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@@ -1,4319 +1,4319 @@
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-/*
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- FreeRTOS V8.2.0 - Copyright (C) 2015 Real Time Engineers Ltd.
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- All rights reserved
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-
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- VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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-
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- This file is part of the FreeRTOS distribution.
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-
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- FreeRTOS is free software; you can redistribute it and/or modify it under
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- the terms of the GNU General Public License (version 2) as published by the
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- Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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-
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- ***************************************************************************
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- >>! NOTE: The modification to the GPL is included to allow you to !<<
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- >>! distribute a combined work that includes FreeRTOS without being !<<
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- >>! obliged to provide the source code for proprietary components !<<
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- >>! outside of the FreeRTOS kernel. !<<
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- ***************************************************************************
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-
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- FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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- WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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- FOR A PARTICULAR PURPOSE. Full license text is available on the following
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- link: http://www.freertos.org/a00114.html
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-
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- ***************************************************************************
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- * *
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- * FreeRTOS provides completely free yet professionally developed, *
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- * robust, strictly quality controlled, supported, and cross *
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- * platform software that is more than just the market leader, it *
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- * is the industry's de facto standard. *
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- * *
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- * Help yourself get started quickly while simultaneously helping *
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- * to support the FreeRTOS project by purchasing a FreeRTOS *
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- * tutorial book, reference manual, or both: *
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- * http://www.FreeRTOS.org/Documentation *
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- * *
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- ***************************************************************************
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-
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- http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
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- the FAQ page "My application does not run, what could be wrong?". Have you
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- defined configASSERT()?
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-
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- http://www.FreeRTOS.org/support - In return for receiving this top quality
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- embedded software for free we request you assist our global community by
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- participating in the support forum.
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-
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- http://www.FreeRTOS.org/training - Investing in training allows your team to
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- be as productive as possible as early as possible. Now you can receive
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- FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
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- Ltd, and the world's leading authority on the world's leading RTOS.
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-
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- http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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- including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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- compatible FAT file system, and our tiny thread aware UDP/IP stack.
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-
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- http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
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- Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
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-
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- http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
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- Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
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- licenses offer ticketed support, indemnification and commercial middleware.
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-
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- http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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- engineered and independently SIL3 certified version for use in safety and
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- mission critical applications that require provable dependability.
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-
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- 1 tab == 4 spaces!
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-*/
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-
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-/* Standard includes. */
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-#include <stdlib.h>
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-#include <string.h>
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-
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-/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
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-all the API functions to use the MPU wrappers. That should only be done when
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-task.h is included from an application file. */
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-#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
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-
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-/* FreeRTOS includes. */
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-#include "FreeRTOS.h"
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-#include "task.h"
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-#include "timers.h"
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-#include "StackMacros.h"
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-
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-/* Lint e961 and e750 are suppressed as a MISRA exception justified because the
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-MPU ports require MPU_WRAPPERS_INCLUDED_FROM_API_FILE to be defined for the
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-header files above, but not in this file, in order to generate the correct
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-privileged Vs unprivileged linkage and placement. */
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-#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE /*lint !e961 !e750. */
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-
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-/* Set configUSE_STATS_FORMATTING_FUNCTIONS to 2 to include the stats formatting
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-functions but without including stdio.h here. */
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-#if ( configUSE_STATS_FORMATTING_FUNCTIONS == 1 )
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- /* At the bottom of this file are two optional functions that can be used
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- to generate human readable text from the raw data generated by the
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- uxTaskGetSystemState() function. Note the formatting functions are provided
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- for convenience only, and are NOT considered part of the kernel. */
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- #include <stdio.h>
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-#endif /* configUSE_STATS_FORMATTING_FUNCTIONS == 1 ) */
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-
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-/* Sanity check the configuration. */
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-#if configUSE_TICKLESS_IDLE != 0
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- #if INCLUDE_vTaskSuspend != 1
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- #error INCLUDE_vTaskSuspend must be set to 1 if configUSE_TICKLESS_IDLE is not set to 0
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- #endif /* INCLUDE_vTaskSuspend */
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-#endif /* configUSE_TICKLESS_IDLE */
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-
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-/*
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- * Defines the size, in words, of the stack allocated to the idle task.
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- */
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-#define tskIDLE_STACK_SIZE configMINIMAL_STACK_SIZE
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-
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-#if( configUSE_PREEMPTION == 0 )
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- /* If the cooperative scheduler is being used then a yield should not be
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- performed just because a higher priority task has been woken. */
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- #define taskYIELD_IF_USING_PREEMPTION()
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-#else
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- #define taskYIELD_IF_USING_PREEMPTION() portYIELD_WITHIN_API()
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-#endif
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-
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-/* Value that can be assigned to the eNotifyState member of the TCB. */
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-typedef enum
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-{
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- eNotWaitingNotification = 0,
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- eWaitingNotification,
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- eNotified
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-} eNotifyValue;
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-
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-/*
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- * Task control block. A task control block (TCB) is allocated for each task,
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- * and stores task state information, including a pointer to the task's context
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- * (the task's run time environment, including register values)
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- */
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-typedef struct tskTaskControlBlock
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-{
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- volatile StackType_t *pxTopOfStack; /*< Points to the location of the last item placed on the tasks stack. THIS MUST BE THE FIRST MEMBER OF THE TCB STRUCT. */
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-
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- #if ( portUSING_MPU_WRAPPERS == 1 )
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- xMPU_SETTINGS xMPUSettings; /*< The MPU settings are defined as part of the port layer. THIS MUST BE THE SECOND MEMBER OF THE TCB STRUCT. */
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- BaseType_t xUsingStaticallyAllocatedStack; /* Set to pdTRUE if the stack is a statically allocated array, and pdFALSE if the stack is dynamically allocated. */
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- #endif
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-
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- ListItem_t xGenericListItem; /*< The list that the state list item of a task is reference from denotes the state of that task (Ready, Blocked, Suspended ). */
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- ListItem_t xEventListItem; /*< Used to reference a task from an event list. */
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- UBaseType_t uxPriority; /*< The priority of the task. 0 is the lowest priority. */
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- StackType_t *pxStack; /*< Points to the start of the stack. */
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- char pcTaskName[ configMAX_TASK_NAME_LEN ];/*< Descriptive name given to the task when created. Facilitates debugging only. */ /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
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-
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- #if ( portSTACK_GROWTH > 0 )
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- StackType_t *pxEndOfStack; /*< Points to the end of the stack on architectures where the stack grows up from low memory. */
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- #endif
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-
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- #if ( portCRITICAL_NESTING_IN_TCB == 1 )
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- UBaseType_t uxCriticalNesting; /*< Holds the critical section nesting depth for ports that do not maintain their own count in the port layer. */
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- #endif
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-
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- #if ( configUSE_TRACE_FACILITY == 1 )
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- UBaseType_t uxTCBNumber; /*< Stores a number that increments each time a TCB is created. It allows debuggers to determine when a task has been deleted and then recreated. */
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- UBaseType_t uxTaskNumber; /*< Stores a number specifically for use by third party trace code. */
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- #endif
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-
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- #if ( configUSE_MUTEXES == 1 )
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- UBaseType_t uxBasePriority; /*< The priority last assigned to the task - used by the priority inheritance mechanism. */
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- UBaseType_t uxMutexesHeld;
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- #endif
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-
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- #if ( configUSE_APPLICATION_TASK_TAG == 1 )
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- TaskHookFunction_t pxTaskTag;
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- #endif
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-
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- #if ( configGENERATE_RUN_TIME_STATS == 1 )
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- uint32_t ulRunTimeCounter; /*< Stores the amount of time the task has spent in the Running state. */
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- #endif
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-
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- #if ( configUSE_NEWLIB_REENTRANT == 1 )
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- /* Allocate a Newlib reent structure that is specific to this task.
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- Note Newlib support has been included by popular demand, but is not
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- used by the FreeRTOS maintainers themselves. FreeRTOS is not
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- responsible for resulting newlib operation. User must be familiar with
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- newlib and must provide system-wide implementations of the necessary
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- stubs. Be warned that (at the time of writing) the current newlib design
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- implements a system-wide malloc() that must be provided with locks. */
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- struct _reent xNewLib_reent;
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- #endif
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-
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- #if ( configUSE_TASK_NOTIFICATIONS == 1 )
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- volatile uint32_t ulNotifiedValue;
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- volatile eNotifyValue eNotifyState;
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- #endif
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-
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-} tskTCB;
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-
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-/* The old tskTCB name is maintained above then typedefed to the new TCB_t name
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-below to enable the use of older kernel aware debuggers. */
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-typedef tskTCB TCB_t;
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-
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-/*
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- * Some kernel aware debuggers require the data the debugger needs access to to
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- * be global, rather than file scope.
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- */
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-#ifdef portREMOVE_STATIC_QUALIFIER
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- #define static
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-#endif
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-
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-/*lint -e956 A manual analysis and inspection has been used to determine which
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-static variables must be declared volatile. */
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-
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-PRIVILEGED_DATA TCB_t * volatile pxCurrentTCB = NULL;
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-
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-/* Lists for ready and blocked tasks. --------------------*/
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-PRIVILEGED_DATA static List_t pxReadyTasksLists[ configMAX_PRIORITIES ];/*< Prioritised ready tasks. */
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-PRIVILEGED_DATA static List_t xDelayedTaskList1; /*< Delayed tasks. */
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-PRIVILEGED_DATA static List_t xDelayedTaskList2; /*< Delayed tasks (two lists are used - one for delays that have overflowed the current tick count. */
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-PRIVILEGED_DATA static List_t * volatile pxDelayedTaskList; /*< Points to the delayed task list currently being used. */
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-PRIVILEGED_DATA static List_t * volatile pxOverflowDelayedTaskList; /*< Points to the delayed task list currently being used to hold tasks that have overflowed the current tick count. */
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-PRIVILEGED_DATA static List_t xPendingReadyList; /*< Tasks that have been readied while the scheduler was suspended. They will be moved to the ready list when the scheduler is resumed. */
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-
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-#if ( INCLUDE_vTaskDelete == 1 )
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-
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- PRIVILEGED_DATA static List_t xTasksWaitingTermination; /*< Tasks that have been deleted - but their memory not yet freed. */
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- PRIVILEGED_DATA static volatile UBaseType_t uxTasksDeleted = ( UBaseType_t ) 0U;
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-
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-#endif
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-
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-#if ( INCLUDE_vTaskSuspend == 1 )
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-
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- PRIVILEGED_DATA static List_t xSuspendedTaskList; /*< Tasks that are currently suspended. */
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-
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-#endif
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-
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-#if ( INCLUDE_xTaskGetIdleTaskHandle == 1 )
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-
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- PRIVILEGED_DATA static TaskHandle_t xIdleTaskHandle = NULL; /*< Holds the handle of the idle task. The idle task is created automatically when the scheduler is started. */
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-
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-#endif
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-
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-/* Other file private variables. --------------------------------*/
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-PRIVILEGED_DATA static volatile UBaseType_t uxCurrentNumberOfTasks = ( UBaseType_t ) 0U;
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-PRIVILEGED_DATA static volatile TickType_t xTickCount = ( TickType_t ) 0U;
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-PRIVILEGED_DATA static volatile UBaseType_t uxTopReadyPriority = tskIDLE_PRIORITY;
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-PRIVILEGED_DATA static volatile BaseType_t xSchedulerRunning = pdFALSE;
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-PRIVILEGED_DATA static volatile UBaseType_t uxPendedTicks = ( UBaseType_t ) 0U;
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-PRIVILEGED_DATA static volatile BaseType_t xYieldPending = pdFALSE;
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-PRIVILEGED_DATA static volatile BaseType_t xNumOfOverflows = ( BaseType_t ) 0;
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-PRIVILEGED_DATA static UBaseType_t uxTaskNumber = ( UBaseType_t ) 0U;
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-PRIVILEGED_DATA static volatile TickType_t xNextTaskUnblockTime = portMAX_DELAY;
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-
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-/* Context switches are held pending while the scheduler is suspended. Also,
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-interrupts must not manipulate the xGenericListItem of a TCB, or any of the
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-lists the xGenericListItem can be referenced from, if the scheduler is suspended.
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-If an interrupt needs to unblock a task while the scheduler is suspended then it
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-moves the task's event list item into the xPendingReadyList, ready for the
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-kernel to move the task from the pending ready list into the real ready list
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-when the scheduler is unsuspended. The pending ready list itself can only be
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-accessed from a critical section. */
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-PRIVILEGED_DATA static volatile UBaseType_t uxSchedulerSuspended = ( UBaseType_t ) pdFALSE;
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-
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-#if ( configGENERATE_RUN_TIME_STATS == 1 )
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-
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- PRIVILEGED_DATA static uint32_t ulTaskSwitchedInTime = 0UL; /*< Holds the value of a timer/counter the last time a task was switched in. */
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- PRIVILEGED_DATA static uint32_t ulTotalRunTime = 0UL; /*< Holds the total amount of execution time as defined by the run time counter clock. */
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-
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-#endif
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-
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-/*lint +e956 */
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-
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-/* Debugging and trace facilities private variables and macros. ------------*/
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-
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-/*
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- * The value used to fill the stack of a task when the task is created. This
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- * is used purely for checking the high water mark for tasks.
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- */
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-#define tskSTACK_FILL_BYTE ( 0xa5U )
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-
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-/*
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- * Macros used by vListTask to indicate which state a task is in.
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- */
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-#define tskBLOCKED_CHAR ( 'B' )
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-#define tskREADY_CHAR ( 'R' )
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-#define tskDELETED_CHAR ( 'D' )
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-#define tskSUSPENDED_CHAR ( 'S' )
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-
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-/*-----------------------------------------------------------*/
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-
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-#if ( configUSE_PORT_OPTIMISED_TASK_SELECTION == 0 )
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-
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- /* If configUSE_PORT_OPTIMISED_TASK_SELECTION is 0 then task selection is
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- performed in a generic way that is not optimised to any particular
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- microcontroller architecture. */
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-
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- /* uxTopReadyPriority holds the priority of the highest priority ready
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- state task. */
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- #define taskRECORD_READY_PRIORITY( uxPriority ) \
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- { \
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- if( ( uxPriority ) > uxTopReadyPriority ) \
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- { \
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- uxTopReadyPriority = ( uxPriority ); \
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- } \
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- } /* taskRECORD_READY_PRIORITY */
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-
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- /*-----------------------------------------------------------*/
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-
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- #define taskSELECT_HIGHEST_PRIORITY_TASK() \
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- { \
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- /* Find the highest priority queue that contains ready tasks. */ \
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- while( listLIST_IS_EMPTY( &( pxReadyTasksLists[ uxTopReadyPriority ] ) ) ) \
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- { \
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- configASSERT( uxTopReadyPriority ); \
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- --uxTopReadyPriority; \
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- } \
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- \
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- /* listGET_OWNER_OF_NEXT_ENTRY indexes through the list, so the tasks of \
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- the same priority get an equal share of the processor time. */ \
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- listGET_OWNER_OF_NEXT_ENTRY( pxCurrentTCB, &( pxReadyTasksLists[ uxTopReadyPriority ] ) ); \
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- } /* taskSELECT_HIGHEST_PRIORITY_TASK */
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-
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- /*-----------------------------------------------------------*/
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-
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- /* Define away taskRESET_READY_PRIORITY() and portRESET_READY_PRIORITY() as
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- they are only required when a port optimised method of task selection is
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- being used. */
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- #define taskRESET_READY_PRIORITY( uxPriority )
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- #define portRESET_READY_PRIORITY( uxPriority, uxTopReadyPriority )
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-
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-#else /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
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-
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- /* If configUSE_PORT_OPTIMISED_TASK_SELECTION is 1 then task selection is
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- performed in a way that is tailored to the particular microcontroller
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- architecture being used. */
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-
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- /* A port optimised version is provided. Call the port defined macros. */
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- #define taskRECORD_READY_PRIORITY( uxPriority ) portRECORD_READY_PRIORITY( uxPriority, uxTopReadyPriority )
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-
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- /*-----------------------------------------------------------*/
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-
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- #define taskSELECT_HIGHEST_PRIORITY_TASK() \
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- { \
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- UBaseType_t uxTopPriority; \
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- \
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- /* Find the highest priority queue that contains ready tasks. */ \
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- portGET_HIGHEST_PRIORITY( uxTopPriority, uxTopReadyPriority ); \
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- configASSERT( listCURRENT_LIST_LENGTH( &( pxReadyTasksLists[ uxTopPriority ] ) ) > 0 ); \
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- listGET_OWNER_OF_NEXT_ENTRY( pxCurrentTCB, &( pxReadyTasksLists[ uxTopPriority ] ) ); \
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- } /* taskSELECT_HIGHEST_PRIORITY_TASK() */
|
|
|
-
|
|
|
- /*-----------------------------------------------------------*/
|
|
|
-
|
|
|
- /* A port optimised version is provided, call it only if the TCB being reset
|
|
|
- is being referenced from a ready list. If it is referenced from a delayed
|
|
|
- or suspended list then it won't be in a ready list. */
|
|
|
- #define taskRESET_READY_PRIORITY( uxPriority ) \
|
|
|
- { \
|
|
|
- if( listCURRENT_LIST_LENGTH( &( pxReadyTasksLists[ ( uxPriority ) ] ) ) == ( UBaseType_t ) 0 ) \
|
|
|
- { \
|
|
|
- portRESET_READY_PRIORITY( ( uxPriority ), ( uxTopReadyPriority ) ); \
|
|
|
- } \
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
|
|
|
-
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-/* pxDelayedTaskList and pxOverflowDelayedTaskList are switched when the tick
|
|
|
-count overflows. */
|
|
|
-#define taskSWITCH_DELAYED_LISTS() \
|
|
|
-{ \
|
|
|
- List_t *pxTemp; \
|
|
|
- \
|
|
|
- /* The delayed tasks list should be empty when the lists are switched. */ \
|
|
|
- configASSERT( ( listLIST_IS_EMPTY( pxDelayedTaskList ) ) ); \
|
|
|
- \
|
|
|
- pxTemp = pxDelayedTaskList; \
|
|
|
- pxDelayedTaskList = pxOverflowDelayedTaskList; \
|
|
|
- pxOverflowDelayedTaskList = pxTemp; \
|
|
|
- xNumOfOverflows++; \
|
|
|
- prvResetNextTaskUnblockTime(); \
|
|
|
-}
|
|
|
-
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-/*
|
|
|
- * Place the task represented by pxTCB into the appropriate ready list for
|
|
|
- * the task. It is inserted at the end of the list.
|
|
|
- */
|
|
|
-#define prvAddTaskToReadyList( pxTCB ) \
|
|
|
- traceMOVED_TASK_TO_READY_STATE( pxTCB ) \
|
|
|
- taskRECORD_READY_PRIORITY( ( pxTCB )->uxPriority ); \
|
|
|
- vListInsertEnd( &( pxReadyTasksLists[ ( pxTCB )->uxPriority ] ), &( ( pxTCB )->xGenericListItem ) )
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-/*
|
|
|
- * Several functions take an TaskHandle_t parameter that can optionally be NULL,
|
|
|
- * where NULL is used to indicate that the handle of the currently executing
|
|
|
- * task should be used in place of the parameter. This macro simply checks to
|
|
|
- * see if the parameter is NULL and returns a pointer to the appropriate TCB.
|
|
|
- */
|
|
|
-#define prvGetTCBFromHandle( pxHandle ) ( ( ( pxHandle ) == NULL ) ? ( TCB_t * ) pxCurrentTCB : ( TCB_t * ) ( pxHandle ) )
|
|
|
-
|
|
|
-/* The item value of the event list item is normally used to hold the priority
|
|
|
-of the task to which it belongs (coded to allow it to be held in reverse
|
|
|
-priority order). However, it is occasionally borrowed for other purposes. It
|
|
|
-is important its value is not updated due to a task priority change while it is
|
|
|
-being used for another purpose. The following bit definition is used to inform
|
|
|
-the scheduler that the value should not be changed - in which case it is the
|
|
|
-responsibility of whichever module is using the value to ensure it gets set back
|
|
|
-to its original value when it is released. */
|
|
|
-#if configUSE_16_BIT_TICKS == 1
|
|
|
- #define taskEVENT_LIST_ITEM_VALUE_IN_USE 0x8000U
|
|
|
-#else
|
|
|
- #define taskEVENT_LIST_ITEM_VALUE_IN_USE 0x80000000UL
|
|
|
-#endif
|
|
|
-
|
|
|
-/* Callback function prototypes. --------------------------*/
|
|
|
-#if configCHECK_FOR_STACK_OVERFLOW > 0
|
|
|
- extern void vApplicationStackOverflowHook( TaskHandle_t xTask, char *pcTaskName );
|
|
|
-#endif
|
|
|
-
|
|
|
-#if configUSE_TICK_HOOK > 0
|
|
|
- extern void vApplicationTickHook( void );
|
|
|
-#endif
|
|
|
-
|
|
|
-/* File private functions. --------------------------------*/
|
|
|
-
|
|
|
-/*
|
|
|
- * Utility to ready a TCB for a given task. Mainly just copies the parameters
|
|
|
- * into the TCB structure.
|
|
|
- */
|
|
|
-static void prvInitialiseTCBVariables( TCB_t * const pxTCB, const char * const pcName, UBaseType_t uxPriority, const MemoryRegion_t * const xRegions, const uint16_t usStackDepth ) PRIVILEGED_FUNCTION; /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
|
|
|
-
|
|
|
-/**
|
|
|
- * Utility task that simply returns pdTRUE if the task referenced by xTask is
|
|
|
- * currently in the Suspended state, or pdFALSE if the task referenced by xTask
|
|
|
- * is in any other state.
|
|
|
- */
|
|
|
-#if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
- static BaseType_t prvTaskIsTaskSuspended( const TaskHandle_t xTask ) PRIVILEGED_FUNCTION;
|
|
|
-#endif /* INCLUDE_vTaskSuspend */
|
|
|
-
|
|
|
-/*
|
|
|
- * Utility to ready all the lists used by the scheduler. This is called
|
|
|
- * automatically upon the creation of the first task.
|
|
|
- */
|
|
|
-static void prvInitialiseTaskLists( void ) PRIVILEGED_FUNCTION;
|
|
|
-
|
|
|
-/*
|
|
|
- * The idle task, which as all tasks is implemented as a never ending loop.
|
|
|
- * The idle task is automatically created and added to the ready lists upon
|
|
|
- * creation of the first user task.
|
|
|
- *
|
|
|
- * The portTASK_FUNCTION_PROTO() macro is used to allow port/compiler specific
|
|
|
- * language extensions. The equivalent prototype for this function is:
|
|
|
- *
|
|
|
- * void prvIdleTask( void *pvParameters );
|
|
|
- *
|
|
|
- */
|
|
|
-static portTASK_FUNCTION_PROTO( prvIdleTask, pvParameters );
|
|
|
-
|
|
|
-/*
|
|
|
- * Utility to free all memory allocated by the scheduler to hold a TCB,
|
|
|
- * including the stack pointed to by the TCB.
|
|
|
- *
|
|
|
- * This does not free memory allocated by the task itself (i.e. memory
|
|
|
- * allocated by calls to pvPortMalloc from within the tasks application code).
|
|
|
- */
|
|
|
-#if ( INCLUDE_vTaskDelete == 1 )
|
|
|
-
|
|
|
- static void prvDeleteTCB( TCB_t *pxTCB ) PRIVILEGED_FUNCTION;
|
|
|
-
|
|
|
-#endif
|
|
|
-
|
|
|
-/*
|
|
|
- * Used only by the idle task. This checks to see if anything has been placed
|
|
|
- * in the list of tasks waiting to be deleted. If so the task is cleaned up
|
|
|
- * and its TCB deleted.
|
|
|
- */
|
|
|
-static void prvCheckTasksWaitingTermination( void ) PRIVILEGED_FUNCTION;
|
|
|
-
|
|
|
-/*
|
|
|
- * The currently executing task is entering the Blocked state. Add the task to
|
|
|
- * either the current or the overflow delayed task list.
|
|
|
- */
|
|
|
-static void prvAddCurrentTaskToDelayedList( const TickType_t xTimeToWake ) PRIVILEGED_FUNCTION;
|
|
|
-
|
|
|
-/*
|
|
|
- * Allocates memory from the heap for a TCB and associated stack. Checks the
|
|
|
- * allocation was successful.
|
|
|
- */
|
|
|
-static TCB_t *prvAllocateTCBAndStack( const uint16_t usStackDepth, StackType_t * const puxStackBuffer ) PRIVILEGED_FUNCTION;
|
|
|
-
|
|
|
-/*
|
|
|
- * Fills an TaskStatus_t structure with information on each task that is
|
|
|
- * referenced from the pxList list (which may be a ready list, a delayed list,
|
|
|
- * a suspended list, etc.).
|
|
|
- *
|
|
|
- * THIS FUNCTION IS INTENDED FOR DEBUGGING ONLY, AND SHOULD NOT BE CALLED FROM
|
|
|
- * NORMAL APPLICATION CODE.
|
|
|
- */
|
|
|
-#if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
-
|
|
|
- static UBaseType_t prvListTaskWithinSingleList( TaskStatus_t *pxTaskStatusArray, List_t *pxList, eTaskState eState ) PRIVILEGED_FUNCTION;
|
|
|
-
|
|
|
-#endif
|
|
|
-
|
|
|
-/*
|
|
|
- * When a task is created, the stack of the task is filled with a known value.
|
|
|
- * This function determines the 'high water mark' of the task stack by
|
|
|
- * determining how much of the stack remains at the original preset value.
|
|
|
- */
|
|
|
-#if ( ( configUSE_TRACE_FACILITY == 1 ) || ( INCLUDE_uxTaskGetStackHighWaterMark == 1 ) )
|
|
|
-
|
|
|
- static uint16_t prvTaskCheckFreeStackSpace( const uint8_t * pucStackByte ) PRIVILEGED_FUNCTION;
|
|
|
-
|
|
|
-#endif
|
|
|
-
|
|
|
-/*
|
|
|
- * Return the amount of time, in ticks, that will pass before the kernel will
|
|
|
- * next move a task from the Blocked state to the Running state.
|
|
|
- *
|
|
|
- * This conditional compilation should use inequality to 0, not equality to 1.
|
|
|
- * This is to ensure portSUPPRESS_TICKS_AND_SLEEP() can be called when user
|
|
|
- * defined low power mode implementations require configUSE_TICKLESS_IDLE to be
|
|
|
- * set to a value other than 1.
|
|
|
- */
|
|
|
-#if ( configUSE_TICKLESS_IDLE != 0 )
|
|
|
-
|
|
|
- static TickType_t prvGetExpectedIdleTime( void ) PRIVILEGED_FUNCTION;
|
|
|
-
|
|
|
-#endif
|
|
|
-
|
|
|
-/*
|
|
|
- * Set xNextTaskUnblockTime to the time at which the next Blocked state task
|
|
|
- * will exit the Blocked state.
|
|
|
- */
|
|
|
-static void prvResetNextTaskUnblockTime( void );
|
|
|
-
|
|
|
-#if ( ( configUSE_TRACE_FACILITY == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) )
|
|
|
-
|
|
|
- /*
|
|
|
- * Helper function used to pad task names with spaces when printing out
|
|
|
- * human readable tables of task information.
|
|
|
- */
|
|
|
- static char *prvWriteNameToBuffer( char *pcBuffer, const char *pcTaskName );
|
|
|
-
|
|
|
-#endif
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-BaseType_t xTaskGenericCreate( TaskFunction_t pxTaskCode, const char * const pcName, const uint16_t usStackDepth, void * const pvParameters, UBaseType_t uxPriority, TaskHandle_t * const pxCreatedTask, StackType_t * const puxStackBuffer, const MemoryRegion_t * const xRegions ) /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
|
|
|
-{
|
|
|
-BaseType_t xReturn;
|
|
|
-TCB_t * pxNewTCB;
|
|
|
-StackType_t *pxTopOfStack;
|
|
|
-
|
|
|
- configASSERT( pxTaskCode );
|
|
|
- configASSERT( ( ( uxPriority & ( ~portPRIVILEGE_BIT ) ) < configMAX_PRIORITIES ) );
|
|
|
-
|
|
|
- /* Allocate the memory required by the TCB and stack for the new task,
|
|
|
- checking that the allocation was successful. */
|
|
|
- pxNewTCB = prvAllocateTCBAndStack( usStackDepth, puxStackBuffer );
|
|
|
-
|
|
|
- if( pxNewTCB != NULL )
|
|
|
- {
|
|
|
- #if( portUSING_MPU_WRAPPERS == 1 )
|
|
|
- /* Should the task be created in privileged mode? */
|
|
|
- BaseType_t xRunPrivileged;
|
|
|
- if( ( uxPriority & portPRIVILEGE_BIT ) != 0U )
|
|
|
- {
|
|
|
- xRunPrivileged = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- xRunPrivileged = pdFALSE;
|
|
|
- }
|
|
|
- uxPriority &= ~portPRIVILEGE_BIT;
|
|
|
-
|
|
|
- if( puxStackBuffer != NULL )
|
|
|
- {
|
|
|
- /* The application provided its own stack. Note this so no
|
|
|
- attempt is made to delete the stack should that task be
|
|
|
- deleted. */
|
|
|
- pxNewTCB->xUsingStaticallyAllocatedStack = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The stack was allocated dynamically. Note this so it can be
|
|
|
- deleted again if the task is deleted. */
|
|
|
- pxNewTCB->xUsingStaticallyAllocatedStack = pdFALSE;
|
|
|
- }
|
|
|
- #endif /* portUSING_MPU_WRAPPERS == 1 */
|
|
|
-
|
|
|
- /* Calculate the top of stack address. This depends on whether the
|
|
|
- stack grows from high memory to low (as per the 80x86) or vice versa.
|
|
|
- portSTACK_GROWTH is used to make the result positive or negative as
|
|
|
- required by the port. */
|
|
|
- #if( portSTACK_GROWTH < 0 )
|
|
|
- {
|
|
|
- pxTopOfStack = pxNewTCB->pxStack + ( usStackDepth - ( uint16_t ) 1 );
|
|
|
- pxTopOfStack = ( StackType_t * ) ( ( ( portPOINTER_SIZE_TYPE ) pxTopOfStack ) & ( ( portPOINTER_SIZE_TYPE ) ~portBYTE_ALIGNMENT_MASK ) ); /*lint !e923 MISRA exception. Avoiding casts between pointers and integers is not practical. Size differences accounted for using portPOINTER_SIZE_TYPE type. */
|
|
|
-
|
|
|
- /* Check the alignment of the calculated top of stack is correct. */
|
|
|
- configASSERT( ( ( ( portPOINTER_SIZE_TYPE ) pxTopOfStack & ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) == 0UL ) );
|
|
|
- }
|
|
|
- #else /* portSTACK_GROWTH */
|
|
|
- {
|
|
|
- pxTopOfStack = pxNewTCB->pxStack;
|
|
|
-
|
|
|
- /* Check the alignment of the stack buffer is correct. */
|
|
|
- configASSERT( ( ( ( portPOINTER_SIZE_TYPE ) pxNewTCB->pxStack & ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) == 0UL ) );
|
|
|
-
|
|
|
- /* If we want to use stack checking on architectures that use
|
|
|
- a positive stack growth direction then we also need to store the
|
|
|
- other extreme of the stack space. */
|
|
|
- pxNewTCB->pxEndOfStack = pxNewTCB->pxStack + ( usStackDepth - 1 );
|
|
|
- }
|
|
|
- #endif /* portSTACK_GROWTH */
|
|
|
-
|
|
|
- /* Setup the newly allocated TCB with the initial state of the task. */
|
|
|
- prvInitialiseTCBVariables( pxNewTCB, pcName, uxPriority, xRegions, usStackDepth );
|
|
|
-
|
|
|
- /* Initialize the TCB stack to look as if the task was already running,
|
|
|
- but had been interrupted by the scheduler. The return address is set
|
|
|
- to the start of the task function. Once the stack has been initialised
|
|
|
- the top of stack variable is updated. */
|
|
|
- #if( portUSING_MPU_WRAPPERS == 1 )
|
|
|
- {
|
|
|
- pxNewTCB->pxTopOfStack = pxPortInitialiseStack( pxTopOfStack, pxTaskCode, pvParameters, xRunPrivileged );
|
|
|
- }
|
|
|
- #else /* portUSING_MPU_WRAPPERS */
|
|
|
- {
|
|
|
- pxNewTCB->pxTopOfStack = pxPortInitialiseStack( pxTopOfStack, pxTaskCode, pvParameters );
|
|
|
- }
|
|
|
- #endif /* portUSING_MPU_WRAPPERS */
|
|
|
-
|
|
|
- if( ( void * ) pxCreatedTask != NULL )
|
|
|
- {
|
|
|
- /* Pass the TCB out - in an anonymous way. The calling function/
|
|
|
- task can use this as a handle to delete the task later if
|
|
|
- required.*/
|
|
|
- *pxCreatedTask = ( TaskHandle_t ) pxNewTCB;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* Ensure interrupts don't access the task lists while they are being
|
|
|
- updated. */
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- uxCurrentNumberOfTasks++;
|
|
|
- if( pxCurrentTCB == NULL )
|
|
|
- {
|
|
|
- /* There are no other tasks, or all the other tasks are in
|
|
|
- the suspended state - make this the current task. */
|
|
|
- pxCurrentTCB = pxNewTCB;
|
|
|
-
|
|
|
- if( uxCurrentNumberOfTasks == ( UBaseType_t ) 1 )
|
|
|
- {
|
|
|
- /* This is the first task to be created so do the preliminary
|
|
|
- initialisation required. We will not recover if this call
|
|
|
- fails, but we will report the failure. */
|
|
|
- prvInitialiseTaskLists();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* If the scheduler is not already running, make this task the
|
|
|
- current task if it is the highest priority task to be created
|
|
|
- so far. */
|
|
|
- if( xSchedulerRunning == pdFALSE )
|
|
|
- {
|
|
|
- if( pxCurrentTCB->uxPriority <= uxPriority )
|
|
|
- {
|
|
|
- pxCurrentTCB = pxNewTCB;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- uxTaskNumber++;
|
|
|
-
|
|
|
- #if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
- {
|
|
|
- /* Add a counter into the TCB for tracing only. */
|
|
|
- pxNewTCB->uxTCBNumber = uxTaskNumber;
|
|
|
- }
|
|
|
- #endif /* configUSE_TRACE_FACILITY */
|
|
|
- traceTASK_CREATE( pxNewTCB );
|
|
|
-
|
|
|
- prvAddTaskToReadyList( pxNewTCB );
|
|
|
-
|
|
|
- xReturn = pdPASS;
|
|
|
- portSETUP_TCB( pxNewTCB );
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- xReturn = errCOULD_NOT_ALLOCATE_REQUIRED_MEMORY;
|
|
|
- traceTASK_CREATE_FAILED();
|
|
|
- }
|
|
|
-
|
|
|
- if( xReturn == pdPASS )
|
|
|
- {
|
|
|
- if( xSchedulerRunning != pdFALSE )
|
|
|
- {
|
|
|
- /* If the created task is of a higher priority than the current task
|
|
|
- then it should run now. */
|
|
|
- if( pxCurrentTCB->uxPriority < uxPriority )
|
|
|
- {
|
|
|
- taskYIELD_IF_USING_PREEMPTION();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- return xReturn;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_vTaskDelete == 1 )
|
|
|
-
|
|
|
- void vTaskDelete( TaskHandle_t xTaskToDelete )
|
|
|
- {
|
|
|
- TCB_t *pxTCB;
|
|
|
-
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- /* If null is passed in here then it is the calling task that is
|
|
|
- being deleted. */
|
|
|
- pxTCB = prvGetTCBFromHandle( xTaskToDelete );
|
|
|
-
|
|
|
- /* Remove task from the ready list and place in the termination list.
|
|
|
- This will stop the task from be scheduled. The idle task will check
|
|
|
- the termination list and free up any memory allocated by the
|
|
|
- scheduler for the TCB and stack. */
|
|
|
- if( uxListRemove( &( pxTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- taskRESET_READY_PRIORITY( pxTCB->uxPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* Is the task waiting on an event also? */
|
|
|
- if( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) != NULL )
|
|
|
- {
|
|
|
- ( void ) uxListRemove( &( pxTCB->xEventListItem ) );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- vListInsertEnd( &xTasksWaitingTermination, &( pxTCB->xGenericListItem ) );
|
|
|
-
|
|
|
- /* Increment the ucTasksDeleted variable so the idle task knows
|
|
|
- there is a task that has been deleted and that it should therefore
|
|
|
- check the xTasksWaitingTermination list. */
|
|
|
- ++uxTasksDeleted;
|
|
|
-
|
|
|
- /* Increment the uxTaskNumberVariable also so kernel aware debuggers
|
|
|
- can detect that the task lists need re-generating. */
|
|
|
- uxTaskNumber++;
|
|
|
-
|
|
|
- traceTASK_DELETE( pxTCB );
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- /* Force a reschedule if it is the currently running task that has just
|
|
|
- been deleted. */
|
|
|
- if( xSchedulerRunning != pdFALSE )
|
|
|
- {
|
|
|
- if( pxTCB == pxCurrentTCB )
|
|
|
- {
|
|
|
- configASSERT( uxSchedulerSuspended == 0 );
|
|
|
-
|
|
|
- /* The pre-delete hook is primarily for the Windows simulator,
|
|
|
- in which Windows specific clean up operations are performed,
|
|
|
- after which it is not possible to yield away from this task -
|
|
|
- hence xYieldPending is used to latch that a context switch is
|
|
|
- required. */
|
|
|
- portPRE_TASK_DELETE_HOOK( pxTCB, &xYieldPending );
|
|
|
- portYIELD_WITHIN_API();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* Reset the next expected unblock time in case it referred to
|
|
|
- the task that has just been deleted. */
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- prvResetNextTaskUnblockTime();
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* INCLUDE_vTaskDelete */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_vTaskDelayUntil == 1 )
|
|
|
-
|
|
|
- void vTaskDelayUntil( TickType_t * const pxPreviousWakeTime, const TickType_t xTimeIncrement )
|
|
|
- {
|
|
|
- TickType_t xTimeToWake;
|
|
|
- BaseType_t xAlreadyYielded, xShouldDelay = pdFALSE;
|
|
|
-
|
|
|
- configASSERT( pxPreviousWakeTime );
|
|
|
- configASSERT( ( xTimeIncrement > 0U ) );
|
|
|
- configASSERT( uxSchedulerSuspended == 0 );
|
|
|
-
|
|
|
- vTaskSuspendAll();
|
|
|
- {
|
|
|
- /* Minor optimisation. The tick count cannot change in this
|
|
|
- block. */
|
|
|
- const TickType_t xConstTickCount = xTickCount;
|
|
|
-
|
|
|
- /* Generate the tick time at which the task wants to wake. */
|
|
|
- xTimeToWake = *pxPreviousWakeTime + xTimeIncrement;
|
|
|
-
|
|
|
- if( xConstTickCount < *pxPreviousWakeTime )
|
|
|
- {
|
|
|
- /* The tick count has overflowed since this function was
|
|
|
- lasted called. In this case the only time we should ever
|
|
|
- actually delay is if the wake time has also overflowed,
|
|
|
- and the wake time is greater than the tick time. When this
|
|
|
- is the case it is as if neither time had overflowed. */
|
|
|
- if( ( xTimeToWake < *pxPreviousWakeTime ) && ( xTimeToWake > xConstTickCount ) )
|
|
|
- {
|
|
|
- xShouldDelay = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The tick time has not overflowed. In this case we will
|
|
|
- delay if either the wake time has overflowed, and/or the
|
|
|
- tick time is less than the wake time. */
|
|
|
- if( ( xTimeToWake < *pxPreviousWakeTime ) || ( xTimeToWake > xConstTickCount ) )
|
|
|
- {
|
|
|
- xShouldDelay = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* Update the wake time ready for the next call. */
|
|
|
- *pxPreviousWakeTime = xTimeToWake;
|
|
|
-
|
|
|
- if( xShouldDelay != pdFALSE )
|
|
|
- {
|
|
|
- traceTASK_DELAY_UNTIL();
|
|
|
-
|
|
|
- /* Remove the task from the ready list before adding it to the
|
|
|
- blocked list as the same list item is used for both lists. */
|
|
|
- if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- /* The current task must be in a ready list, so there is
|
|
|
- no need to check, and the port reset macro can be called
|
|
|
- directly. */
|
|
|
- portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- xAlreadyYielded = xTaskResumeAll();
|
|
|
-
|
|
|
- /* Force a reschedule if xTaskResumeAll has not already done so, we may
|
|
|
- have put ourselves to sleep. */
|
|
|
- if( xAlreadyYielded == pdFALSE )
|
|
|
- {
|
|
|
- portYIELD_WITHIN_API();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* INCLUDE_vTaskDelayUntil */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_vTaskDelay == 1 )
|
|
|
-
|
|
|
- void vTaskDelay( const TickType_t xTicksToDelay )
|
|
|
- {
|
|
|
- TickType_t xTimeToWake;
|
|
|
- BaseType_t xAlreadyYielded = pdFALSE;
|
|
|
-
|
|
|
-
|
|
|
- /* A delay time of zero just forces a reschedule. */
|
|
|
- if( xTicksToDelay > ( TickType_t ) 0U )
|
|
|
- {
|
|
|
- configASSERT( uxSchedulerSuspended == 0 );
|
|
|
- vTaskSuspendAll();
|
|
|
- {
|
|
|
- traceTASK_DELAY();
|
|
|
-
|
|
|
- /* A task that is removed from the event list while the
|
|
|
- scheduler is suspended will not get placed in the ready
|
|
|
- list or removed from the blocked list until the scheduler
|
|
|
- is resumed.
|
|
|
-
|
|
|
- This task cannot be in an event list as it is the currently
|
|
|
- executing task. */
|
|
|
-
|
|
|
- /* Calculate the time to wake - this may overflow but this is
|
|
|
- not a problem. */
|
|
|
- xTimeToWake = xTickCount + xTicksToDelay;
|
|
|
-
|
|
|
- /* We must remove ourselves from the ready list before adding
|
|
|
- ourselves to the blocked list as the same list item is used for
|
|
|
- both lists. */
|
|
|
- if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- /* The current task must be in a ready list, so there is
|
|
|
- no need to check, and the port reset macro can be called
|
|
|
- directly. */
|
|
|
- portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
- }
|
|
|
- xAlreadyYielded = xTaskResumeAll();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* Force a reschedule if xTaskResumeAll has not already done so, we may
|
|
|
- have put ourselves to sleep. */
|
|
|
- if( xAlreadyYielded == pdFALSE )
|
|
|
- {
|
|
|
- portYIELD_WITHIN_API();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* INCLUDE_vTaskDelay */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_eTaskGetState == 1 )
|
|
|
-
|
|
|
- eTaskState eTaskGetState( TaskHandle_t xTask )
|
|
|
- {
|
|
|
- eTaskState eReturn;
|
|
|
- List_t *pxStateList;
|
|
|
- const TCB_t * const pxTCB = ( TCB_t * ) xTask;
|
|
|
-
|
|
|
- configASSERT( pxTCB );
|
|
|
-
|
|
|
- if( pxTCB == pxCurrentTCB )
|
|
|
- {
|
|
|
- /* The task calling this function is querying its own state. */
|
|
|
- eReturn = eRunning;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- pxStateList = ( List_t * ) listLIST_ITEM_CONTAINER( &( pxTCB->xGenericListItem ) );
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- if( ( pxStateList == pxDelayedTaskList ) || ( pxStateList == pxOverflowDelayedTaskList ) )
|
|
|
- {
|
|
|
- /* The task being queried is referenced from one of the Blocked
|
|
|
- lists. */
|
|
|
- eReturn = eBlocked;
|
|
|
- }
|
|
|
-
|
|
|
- #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
- else if( pxStateList == &xSuspendedTaskList )
|
|
|
- {
|
|
|
- /* The task being queried is referenced from the suspended
|
|
|
- list. Is it genuinely suspended or is it block
|
|
|
- indefinitely? */
|
|
|
- if( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) == NULL )
|
|
|
- {
|
|
|
- eReturn = eSuspended;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- eReturn = eBlocked;
|
|
|
- }
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- #if ( INCLUDE_vTaskDelete == 1 )
|
|
|
- else if( pxStateList == &xTasksWaitingTermination )
|
|
|
- {
|
|
|
- /* The task being queried is referenced from the deleted
|
|
|
- tasks list. */
|
|
|
- eReturn = eDeleted;
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- else /*lint !e525 Negative indentation is intended to make use of pre-processor clearer. */
|
|
|
- {
|
|
|
- /* If the task is not in any other state, it must be in the
|
|
|
- Ready (including pending ready) state. */
|
|
|
- eReturn = eReady;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- return eReturn;
|
|
|
- } /*lint !e818 xTask cannot be a pointer to const because it is a typedef. */
|
|
|
-
|
|
|
-#endif /* INCLUDE_eTaskGetState */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_uxTaskPriorityGet == 1 )
|
|
|
-
|
|
|
- UBaseType_t uxTaskPriorityGet( TaskHandle_t xTask )
|
|
|
- {
|
|
|
- TCB_t *pxTCB;
|
|
|
- UBaseType_t uxReturn;
|
|
|
-
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- /* If null is passed in here then we are changing the
|
|
|
- priority of the calling function. */
|
|
|
- pxTCB = prvGetTCBFromHandle( xTask );
|
|
|
- uxReturn = pxTCB->uxPriority;
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- return uxReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* INCLUDE_uxTaskPriorityGet */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_uxTaskPriorityGet == 1 )
|
|
|
-
|
|
|
- UBaseType_t uxTaskPriorityGetFromISR( TaskHandle_t xTask )
|
|
|
- {
|
|
|
- TCB_t *pxTCB;
|
|
|
- UBaseType_t uxReturn, uxSavedInterruptState;
|
|
|
-
|
|
|
- /* RTOS ports that support interrupt nesting have the concept of a
|
|
|
- maximum system call (or maximum API call) interrupt priority.
|
|
|
- Interrupts that are above the maximum system call priority are keep
|
|
|
- permanently enabled, even when the RTOS kernel is in a critical section,
|
|
|
- but cannot make any calls to FreeRTOS API functions. If configASSERT()
|
|
|
- is defined in FreeRTOSConfig.h then
|
|
|
- portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion
|
|
|
- failure if a FreeRTOS API function is called from an interrupt that has
|
|
|
- been assigned a priority above the configured maximum system call
|
|
|
- priority. Only FreeRTOS functions that end in FromISR can be called
|
|
|
- from interrupts that have been assigned a priority at or (logically)
|
|
|
- below the maximum system call interrupt priority. FreeRTOS maintains a
|
|
|
- separate interrupt safe API to ensure interrupt entry is as fast and as
|
|
|
- simple as possible. More information (albeit Cortex-M specific) is
|
|
|
- provided on the following link:
|
|
|
- http://www.freertos.org/RTOS-Cortex-M3-M4.html */
|
|
|
- portASSERT_IF_INTERRUPT_PRIORITY_INVALID();
|
|
|
-
|
|
|
- uxSavedInterruptState = portSET_INTERRUPT_MASK_FROM_ISR();
|
|
|
- {
|
|
|
- /* If null is passed in here then it is the priority of the calling
|
|
|
- task that is being queried. */
|
|
|
- pxTCB = prvGetTCBFromHandle( xTask );
|
|
|
- uxReturn = pxTCB->uxPriority;
|
|
|
- }
|
|
|
- portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptState );
|
|
|
-
|
|
|
- return uxReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* INCLUDE_uxTaskPriorityGet */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_vTaskPrioritySet == 1 )
|
|
|
-
|
|
|
- void vTaskPrioritySet( TaskHandle_t xTask, UBaseType_t uxNewPriority )
|
|
|
- {
|
|
|
- TCB_t *pxTCB;
|
|
|
- UBaseType_t uxCurrentBasePriority, uxPriorityUsedOnEntry;
|
|
|
- BaseType_t xYieldRequired = pdFALSE;
|
|
|
-
|
|
|
- configASSERT( ( uxNewPriority < configMAX_PRIORITIES ) );
|
|
|
-
|
|
|
- /* Ensure the new priority is valid. */
|
|
|
- if( uxNewPriority >= ( UBaseType_t ) configMAX_PRIORITIES )
|
|
|
- {
|
|
|
- uxNewPriority = ( UBaseType_t ) configMAX_PRIORITIES - ( UBaseType_t ) 1U;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- /* If null is passed in here then it is the priority of the calling
|
|
|
- task that is being changed. */
|
|
|
- pxTCB = prvGetTCBFromHandle( xTask );
|
|
|
-
|
|
|
- traceTASK_PRIORITY_SET( pxTCB, uxNewPriority );
|
|
|
-
|
|
|
- #if ( configUSE_MUTEXES == 1 )
|
|
|
- {
|
|
|
- uxCurrentBasePriority = pxTCB->uxBasePriority;
|
|
|
- }
|
|
|
- #else
|
|
|
- {
|
|
|
- uxCurrentBasePriority = pxTCB->uxPriority;
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- if( uxCurrentBasePriority != uxNewPriority )
|
|
|
- {
|
|
|
- /* The priority change may have readied a task of higher
|
|
|
- priority than the calling task. */
|
|
|
- if( uxNewPriority > uxCurrentBasePriority )
|
|
|
- {
|
|
|
- if( pxTCB != pxCurrentTCB )
|
|
|
- {
|
|
|
- /* The priority of a task other than the currently
|
|
|
- running task is being raised. Is the priority being
|
|
|
- raised above that of the running task? */
|
|
|
- if( uxNewPriority >= pxCurrentTCB->uxPriority )
|
|
|
- {
|
|
|
- xYieldRequired = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The priority of the running task is being raised,
|
|
|
- but the running task must already be the highest
|
|
|
- priority task able to run so no yield is required. */
|
|
|
- }
|
|
|
- }
|
|
|
- else if( pxTCB == pxCurrentTCB )
|
|
|
- {
|
|
|
- /* Setting the priority of the running task down means
|
|
|
- there may now be another task of higher priority that
|
|
|
- is ready to execute. */
|
|
|
- xYieldRequired = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* Setting the priority of any other task down does not
|
|
|
- require a yield as the running task must be above the
|
|
|
- new priority of the task being modified. */
|
|
|
- }
|
|
|
-
|
|
|
- /* Remember the ready list the task might be referenced from
|
|
|
- before its uxPriority member is changed so the
|
|
|
- taskRESET_READY_PRIORITY() macro can function correctly. */
|
|
|
- uxPriorityUsedOnEntry = pxTCB->uxPriority;
|
|
|
-
|
|
|
- #if ( configUSE_MUTEXES == 1 )
|
|
|
- {
|
|
|
- /* Only change the priority being used if the task is not
|
|
|
- currently using an inherited priority. */
|
|
|
- if( pxTCB->uxBasePriority == pxTCB->uxPriority )
|
|
|
- {
|
|
|
- pxTCB->uxPriority = uxNewPriority;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* The base priority gets set whatever. */
|
|
|
- pxTCB->uxBasePriority = uxNewPriority;
|
|
|
- }
|
|
|
- #else
|
|
|
- {
|
|
|
- pxTCB->uxPriority = uxNewPriority;
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- /* Only reset the event list item value if the value is not
|
|
|
- being used for anything else. */
|
|
|
- if( ( listGET_LIST_ITEM_VALUE( &( pxTCB->xEventListItem ) ) & taskEVENT_LIST_ITEM_VALUE_IN_USE ) == 0UL )
|
|
|
- {
|
|
|
- listSET_LIST_ITEM_VALUE( &( pxTCB->xEventListItem ), ( ( TickType_t ) configMAX_PRIORITIES - ( TickType_t ) uxNewPriority ) ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* If the task is in the blocked or suspended list we need do
|
|
|
- nothing more than change it's priority variable. However, if
|
|
|
- the task is in a ready list it needs to be removed and placed
|
|
|
- in the list appropriate to its new priority. */
|
|
|
- if( listIS_CONTAINED_WITHIN( &( pxReadyTasksLists[ uxPriorityUsedOnEntry ] ), &( pxTCB->xGenericListItem ) ) != pdFALSE )
|
|
|
- {
|
|
|
- /* The task is currently in its ready list - remove before adding
|
|
|
- it to it's new ready list. As we are in a critical section we
|
|
|
- can do this even if the scheduler is suspended. */
|
|
|
- if( uxListRemove( &( pxTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- /* It is known that the task is in its ready list so
|
|
|
- there is no need to check again and the port level
|
|
|
- reset macro can be called directly. */
|
|
|
- portRESET_READY_PRIORITY( uxPriorityUsedOnEntry, uxTopReadyPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- prvAddTaskToReadyList( pxTCB );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- if( xYieldRequired == pdTRUE )
|
|
|
- {
|
|
|
- taskYIELD_IF_USING_PREEMPTION();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* Remove compiler warning about unused variables when the port
|
|
|
- optimised task selection is not being used. */
|
|
|
- ( void ) uxPriorityUsedOnEntry;
|
|
|
- }
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* INCLUDE_vTaskPrioritySet */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
-
|
|
|
- void vTaskSuspend( TaskHandle_t xTaskToSuspend )
|
|
|
- {
|
|
|
- TCB_t *pxTCB;
|
|
|
-
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- /* If null is passed in here then it is the running task that is
|
|
|
- being suspended. */
|
|
|
- pxTCB = prvGetTCBFromHandle( xTaskToSuspend );
|
|
|
-
|
|
|
- traceTASK_SUSPEND( pxTCB );
|
|
|
-
|
|
|
- /* Remove task from the ready/delayed list and place in the
|
|
|
- suspended list. */
|
|
|
- if( uxListRemove( &( pxTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- taskRESET_READY_PRIORITY( pxTCB->uxPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* Is the task waiting on an event also? */
|
|
|
- if( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) != NULL )
|
|
|
- {
|
|
|
- ( void ) uxListRemove( &( pxTCB->xEventListItem ) );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- vListInsertEnd( &xSuspendedTaskList, &( pxTCB->xGenericListItem ) );
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- if( pxTCB == pxCurrentTCB )
|
|
|
- {
|
|
|
- if( xSchedulerRunning != pdFALSE )
|
|
|
- {
|
|
|
- /* The current task has just been suspended. */
|
|
|
- configASSERT( uxSchedulerSuspended == 0 );
|
|
|
- portYIELD_WITHIN_API();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The scheduler is not running, but the task that was pointed
|
|
|
- to by pxCurrentTCB has just been suspended and pxCurrentTCB
|
|
|
- must be adjusted to point to a different task. */
|
|
|
- if( listCURRENT_LIST_LENGTH( &xSuspendedTaskList ) == uxCurrentNumberOfTasks )
|
|
|
- {
|
|
|
- /* No other tasks are ready, so set pxCurrentTCB back to
|
|
|
- NULL so when the next task is created pxCurrentTCB will
|
|
|
- be set to point to it no matter what its relative priority
|
|
|
- is. */
|
|
|
- pxCurrentTCB = NULL;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- vTaskSwitchContext();
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- if( xSchedulerRunning != pdFALSE )
|
|
|
- {
|
|
|
- /* A task other than the currently running task was suspended,
|
|
|
- reset the next expected unblock time in case it referred to the
|
|
|
- task that is now in the Suspended state. */
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- prvResetNextTaskUnblockTime();
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* INCLUDE_vTaskSuspend */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
-
|
|
|
- static BaseType_t prvTaskIsTaskSuspended( const TaskHandle_t xTask )
|
|
|
- {
|
|
|
- BaseType_t xReturn = pdFALSE;
|
|
|
- const TCB_t * const pxTCB = ( TCB_t * ) xTask;
|
|
|
-
|
|
|
- /* Accesses xPendingReadyList so must be called from a critical
|
|
|
- section. */
|
|
|
-
|
|
|
- /* It does not make sense to check if the calling task is suspended. */
|
|
|
- configASSERT( xTask );
|
|
|
-
|
|
|
- /* Is the task being resumed actually in the suspended list? */
|
|
|
- if( listIS_CONTAINED_WITHIN( &xSuspendedTaskList, &( pxTCB->xGenericListItem ) ) != pdFALSE )
|
|
|
- {
|
|
|
- /* Has the task already been resumed from within an ISR? */
|
|
|
- if( listIS_CONTAINED_WITHIN( &xPendingReadyList, &( pxTCB->xEventListItem ) ) == pdFALSE )
|
|
|
- {
|
|
|
- /* Is it in the suspended list because it is in the Suspended
|
|
|
- state, or because is is blocked with no timeout? */
|
|
|
- if( listIS_CONTAINED_WITHIN( NULL, &( pxTCB->xEventListItem ) ) != pdFALSE )
|
|
|
- {
|
|
|
- xReturn = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- return xReturn;
|
|
|
- } /*lint !e818 xTask cannot be a pointer to const because it is a typedef. */
|
|
|
-
|
|
|
-#endif /* INCLUDE_vTaskSuspend */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
-
|
|
|
- void vTaskResume( TaskHandle_t xTaskToResume )
|
|
|
- {
|
|
|
- TCB_t * const pxTCB = ( TCB_t * ) xTaskToResume;
|
|
|
-
|
|
|
- /* It does not make sense to resume the calling task. */
|
|
|
- configASSERT( xTaskToResume );
|
|
|
-
|
|
|
- /* The parameter cannot be NULL as it is impossible to resume the
|
|
|
- currently executing task. */
|
|
|
- if( ( pxTCB != NULL ) && ( pxTCB != pxCurrentTCB ) )
|
|
|
- {
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- if( prvTaskIsTaskSuspended( pxTCB ) == pdTRUE )
|
|
|
- {
|
|
|
- traceTASK_RESUME( pxTCB );
|
|
|
-
|
|
|
- /* As we are in a critical section we can access the ready
|
|
|
- lists even if the scheduler is suspended. */
|
|
|
- ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
- prvAddTaskToReadyList( pxTCB );
|
|
|
-
|
|
|
- /* We may have just resumed a higher priority task. */
|
|
|
- if( pxTCB->uxPriority >= pxCurrentTCB->uxPriority )
|
|
|
- {
|
|
|
- /* This yield may not cause the task just resumed to run,
|
|
|
- but will leave the lists in the correct state for the
|
|
|
- next yield. */
|
|
|
- taskYIELD_IF_USING_PREEMPTION();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* INCLUDE_vTaskSuspend */
|
|
|
-
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( ( INCLUDE_xTaskResumeFromISR == 1 ) && ( INCLUDE_vTaskSuspend == 1 ) )
|
|
|
-
|
|
|
- BaseType_t xTaskResumeFromISR( TaskHandle_t xTaskToResume )
|
|
|
- {
|
|
|
- BaseType_t xYieldRequired = pdFALSE;
|
|
|
- TCB_t * const pxTCB = ( TCB_t * ) xTaskToResume;
|
|
|
- UBaseType_t uxSavedInterruptStatus;
|
|
|
-
|
|
|
- configASSERT( xTaskToResume );
|
|
|
-
|
|
|
- /* RTOS ports that support interrupt nesting have the concept of a
|
|
|
- maximum system call (or maximum API call) interrupt priority.
|
|
|
- Interrupts that are above the maximum system call priority are keep
|
|
|
- permanently enabled, even when the RTOS kernel is in a critical section,
|
|
|
- but cannot make any calls to FreeRTOS API functions. If configASSERT()
|
|
|
- is defined in FreeRTOSConfig.h then
|
|
|
- portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion
|
|
|
- failure if a FreeRTOS API function is called from an interrupt that has
|
|
|
- been assigned a priority above the configured maximum system call
|
|
|
- priority. Only FreeRTOS functions that end in FromISR can be called
|
|
|
- from interrupts that have been assigned a priority at or (logically)
|
|
|
- below the maximum system call interrupt priority. FreeRTOS maintains a
|
|
|
- separate interrupt safe API to ensure interrupt entry is as fast and as
|
|
|
- simple as possible. More information (albeit Cortex-M specific) is
|
|
|
- provided on the following link:
|
|
|
- http://www.freertos.org/RTOS-Cortex-M3-M4.html */
|
|
|
- portASSERT_IF_INTERRUPT_PRIORITY_INVALID();
|
|
|
-
|
|
|
- uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
|
|
|
- {
|
|
|
- if( prvTaskIsTaskSuspended( pxTCB ) == pdTRUE )
|
|
|
- {
|
|
|
- traceTASK_RESUME_FROM_ISR( pxTCB );
|
|
|
-
|
|
|
- /* Check the ready lists can be accessed. */
|
|
|
- if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
- {
|
|
|
- /* Ready lists can be accessed so move the task from the
|
|
|
- suspended list to the ready list directly. */
|
|
|
- if( pxTCB->uxPriority >= pxCurrentTCB->uxPriority )
|
|
|
- {
|
|
|
- xYieldRequired = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
- prvAddTaskToReadyList( pxTCB );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The delayed or ready lists cannot be accessed so the task
|
|
|
- is held in the pending ready list until the scheduler is
|
|
|
- unsuspended. */
|
|
|
- vListInsertEnd( &( xPendingReadyList ), &( pxTCB->xEventListItem ) );
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
|
|
|
-
|
|
|
- return xYieldRequired;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* ( ( INCLUDE_xTaskResumeFromISR == 1 ) && ( INCLUDE_vTaskSuspend == 1 ) ) */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-void vTaskStartScheduler( void )
|
|
|
-{
|
|
|
-BaseType_t xReturn;
|
|
|
-
|
|
|
- /* Add the idle task at the lowest priority. */
|
|
|
- #if ( INCLUDE_xTaskGetIdleTaskHandle == 1 )
|
|
|
- {
|
|
|
- /* Create the idle task, storing its handle in xIdleTaskHandle so it can
|
|
|
- be returned by the xTaskGetIdleTaskHandle() function. */
|
|
|
- xReturn = xTaskCreate( prvIdleTask, "IDLE", tskIDLE_STACK_SIZE, ( void * ) NULL, ( tskIDLE_PRIORITY | portPRIVILEGE_BIT ), &xIdleTaskHandle ); /*lint !e961 MISRA exception, justified as it is not a redundant explicit cast to all supported compilers. */
|
|
|
- }
|
|
|
- #else
|
|
|
- {
|
|
|
- /* Create the idle task without storing its handle. */
|
|
|
- xReturn = xTaskCreate( prvIdleTask, "IDLE", tskIDLE_STACK_SIZE, ( void * ) NULL, ( tskIDLE_PRIORITY | portPRIVILEGE_BIT ), NULL ); /*lint !e961 MISRA exception, justified as it is not a redundant explicit cast to all supported compilers. */
|
|
|
- }
|
|
|
- #endif /* INCLUDE_xTaskGetIdleTaskHandle */
|
|
|
-
|
|
|
- #if ( configUSE_TIMERS == 1 )
|
|
|
- {
|
|
|
- if( xReturn == pdPASS )
|
|
|
- {
|
|
|
- xReturn = xTimerCreateTimerTask();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- #endif /* configUSE_TIMERS */
|
|
|
-
|
|
|
- if( xReturn == pdPASS )
|
|
|
- {
|
|
|
- /* Interrupts are turned off here, to ensure a tick does not occur
|
|
|
- before or during the call to xPortStartScheduler(). The stacks of
|
|
|
- the created tasks contain a status word with interrupts switched on
|
|
|
- so interrupts will automatically get re-enabled when the first task
|
|
|
- starts to run. */
|
|
|
- portDISABLE_INTERRUPTS();
|
|
|
-
|
|
|
- #if ( configUSE_NEWLIB_REENTRANT == 1 )
|
|
|
- {
|
|
|
- /* Switch Newlib's _impure_ptr variable to point to the _reent
|
|
|
- structure specific to the task that will run first. */
|
|
|
- _impure_ptr = &( pxCurrentTCB->xNewLib_reent );
|
|
|
- }
|
|
|
- #endif /* configUSE_NEWLIB_REENTRANT */
|
|
|
-
|
|
|
- xSchedulerRunning = pdTRUE;
|
|
|
- xTickCount = ( TickType_t ) 0U;
|
|
|
-
|
|
|
- /* If configGENERATE_RUN_TIME_STATS is defined then the following
|
|
|
- macro must be defined to configure the timer/counter used to generate
|
|
|
- the run time counter time base. */
|
|
|
- portCONFIGURE_TIMER_FOR_RUN_TIME_STATS();
|
|
|
-
|
|
|
- /* Setting up the timer tick is hardware specific and thus in the
|
|
|
- portable interface. */
|
|
|
- if( xPortStartScheduler() != pdFALSE )
|
|
|
- {
|
|
|
- /* Should not reach here as if the scheduler is running the
|
|
|
- function will not return. */
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* Should only reach here if a task calls xTaskEndScheduler(). */
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* This line will only be reached if the kernel could not be started,
|
|
|
- because there was not enough FreeRTOS heap to create the idle task
|
|
|
- or the timer task. */
|
|
|
- configASSERT( xReturn );
|
|
|
- }
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-void vTaskEndScheduler( void )
|
|
|
-{
|
|
|
- /* Stop the scheduler interrupts and call the portable scheduler end
|
|
|
- routine so the original ISRs can be restored if necessary. The port
|
|
|
- layer must ensure interrupts enable bit is left in the correct state. */
|
|
|
- portDISABLE_INTERRUPTS();
|
|
|
- xSchedulerRunning = pdFALSE;
|
|
|
- vPortEndScheduler();
|
|
|
-}
|
|
|
-/*----------------------------------------------------------*/
|
|
|
-
|
|
|
-void vTaskSuspendAll( void )
|
|
|
-{
|
|
|
- /* A critical section is not required as the variable is of type
|
|
|
- BaseType_t. Please read Richard Barry's reply in the following link to a
|
|
|
- post in the FreeRTOS support forum before reporting this as a bug! -
|
|
|
- http://goo.gl/wu4acr */
|
|
|
- ++uxSchedulerSuspended;
|
|
|
-}
|
|
|
-/*----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( configUSE_TICKLESS_IDLE != 0 )
|
|
|
-
|
|
|
- static TickType_t prvGetExpectedIdleTime( void )
|
|
|
- {
|
|
|
- TickType_t xReturn;
|
|
|
-
|
|
|
- if( pxCurrentTCB->uxPriority > tskIDLE_PRIORITY )
|
|
|
- {
|
|
|
- xReturn = 0;
|
|
|
- }
|
|
|
- else if( listCURRENT_LIST_LENGTH( &( pxReadyTasksLists[ tskIDLE_PRIORITY ] ) ) > 1 )
|
|
|
- {
|
|
|
- /* There are other idle priority tasks in the ready state. If
|
|
|
- time slicing is used then the very next tick interrupt must be
|
|
|
- processed. */
|
|
|
- xReturn = 0;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- xReturn = xNextTaskUnblockTime - xTickCount;
|
|
|
- }
|
|
|
-
|
|
|
- return xReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_TICKLESS_IDLE */
|
|
|
-/*----------------------------------------------------------*/
|
|
|
-
|
|
|
-BaseType_t xTaskResumeAll( void )
|
|
|
-{
|
|
|
-TCB_t *pxTCB;
|
|
|
-BaseType_t xAlreadyYielded = pdFALSE;
|
|
|
-
|
|
|
- /* If uxSchedulerSuspended is zero then this function does not match a
|
|
|
- previous call to vTaskSuspendAll(). */
|
|
|
- configASSERT( uxSchedulerSuspended );
|
|
|
-
|
|
|
- /* It is possible that an ISR caused a task to be removed from an event
|
|
|
- list while the scheduler was suspended. If this was the case then the
|
|
|
- removed task will have been added to the xPendingReadyList. Once the
|
|
|
- scheduler has been resumed it is safe to move all the pending ready
|
|
|
- tasks from this list into their appropriate ready list. */
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- --uxSchedulerSuspended;
|
|
|
-
|
|
|
- if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
- {
|
|
|
- if( uxCurrentNumberOfTasks > ( UBaseType_t ) 0U )
|
|
|
- {
|
|
|
- /* Move any readied tasks from the pending list into the
|
|
|
- appropriate ready list. */
|
|
|
- while( listLIST_IS_EMPTY( &xPendingReadyList ) == pdFALSE )
|
|
|
- {
|
|
|
- pxTCB = ( TCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( ( &xPendingReadyList ) );
|
|
|
- ( void ) uxListRemove( &( pxTCB->xEventListItem ) );
|
|
|
- ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
- prvAddTaskToReadyList( pxTCB );
|
|
|
-
|
|
|
- /* If the moved task has a priority higher than the current
|
|
|
- task then a yield must be performed. */
|
|
|
- if( pxTCB->uxPriority >= pxCurrentTCB->uxPriority )
|
|
|
- {
|
|
|
- xYieldPending = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* If any ticks occurred while the scheduler was suspended then
|
|
|
- they should be processed now. This ensures the tick count does
|
|
|
- not slip, and that any delayed tasks are resumed at the correct
|
|
|
- time. */
|
|
|
- if( uxPendedTicks > ( UBaseType_t ) 0U )
|
|
|
- {
|
|
|
- while( uxPendedTicks > ( UBaseType_t ) 0U )
|
|
|
- {
|
|
|
- if( xTaskIncrementTick() != pdFALSE )
|
|
|
- {
|
|
|
- xYieldPending = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- --uxPendedTicks;
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- if( xYieldPending == pdTRUE )
|
|
|
- {
|
|
|
- #if( configUSE_PREEMPTION != 0 )
|
|
|
- {
|
|
|
- xAlreadyYielded = pdTRUE;
|
|
|
- }
|
|
|
- #endif
|
|
|
- taskYIELD_IF_USING_PREEMPTION();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- return xAlreadyYielded;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-TickType_t xTaskGetTickCount( void )
|
|
|
-{
|
|
|
-TickType_t xTicks;
|
|
|
-
|
|
|
- /* Critical section required if running on a 16 bit processor. */
|
|
|
- portTICK_TYPE_ENTER_CRITICAL();
|
|
|
- {
|
|
|
- xTicks = xTickCount;
|
|
|
- }
|
|
|
- portTICK_TYPE_EXIT_CRITICAL();
|
|
|
-
|
|
|
- return xTicks;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-TickType_t xTaskGetTickCountFromISR( void )
|
|
|
-{
|
|
|
-TickType_t xReturn;
|
|
|
-UBaseType_t uxSavedInterruptStatus;
|
|
|
-
|
|
|
- /* RTOS ports that support interrupt nesting have the concept of a maximum
|
|
|
- system call (or maximum API call) interrupt priority. Interrupts that are
|
|
|
- above the maximum system call priority are kept permanently enabled, even
|
|
|
- when the RTOS kernel is in a critical section, but cannot make any calls to
|
|
|
- FreeRTOS API functions. If configASSERT() is defined in FreeRTOSConfig.h
|
|
|
- then portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion
|
|
|
- failure if a FreeRTOS API function is called from an interrupt that has been
|
|
|
- assigned a priority above the configured maximum system call priority.
|
|
|
- Only FreeRTOS functions that end in FromISR can be called from interrupts
|
|
|
- that have been assigned a priority at or (logically) below the maximum
|
|
|
- system call interrupt priority. FreeRTOS maintains a separate interrupt
|
|
|
- safe API to ensure interrupt entry is as fast and as simple as possible.
|
|
|
- More information (albeit Cortex-M specific) is provided on the following
|
|
|
- link: http://www.freertos.org/RTOS-Cortex-M3-M4.html */
|
|
|
- portASSERT_IF_INTERRUPT_PRIORITY_INVALID();
|
|
|
-
|
|
|
- uxSavedInterruptStatus = portTICK_TYPE_SET_INTERRUPT_MASK_FROM_ISR();
|
|
|
- {
|
|
|
- xReturn = xTickCount;
|
|
|
- }
|
|
|
- portTICK_TYPE_CLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
|
|
|
-
|
|
|
- return xReturn;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-UBaseType_t uxTaskGetNumberOfTasks( void )
|
|
|
-{
|
|
|
- /* A critical section is not required because the variables are of type
|
|
|
- BaseType_t. */
|
|
|
- return uxCurrentNumberOfTasks;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_pcTaskGetTaskName == 1 )
|
|
|
-
|
|
|
- char *pcTaskGetTaskName( TaskHandle_t xTaskToQuery ) /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
|
|
|
- {
|
|
|
- TCB_t *pxTCB;
|
|
|
-
|
|
|
- /* If null is passed in here then the name of the calling task is being queried. */
|
|
|
- pxTCB = prvGetTCBFromHandle( xTaskToQuery );
|
|
|
- configASSERT( pxTCB );
|
|
|
- return &( pxTCB->pcTaskName[ 0 ] );
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* INCLUDE_pcTaskGetTaskName */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
-
|
|
|
- UBaseType_t uxTaskGetSystemState( TaskStatus_t * const pxTaskStatusArray, const UBaseType_t uxArraySize, uint32_t * const pulTotalRunTime )
|
|
|
- {
|
|
|
- UBaseType_t uxTask = 0, uxQueue = configMAX_PRIORITIES;
|
|
|
-
|
|
|
- vTaskSuspendAll();
|
|
|
- {
|
|
|
- /* Is there a space in the array for each task in the system? */
|
|
|
- if( uxArraySize >= uxCurrentNumberOfTasks )
|
|
|
- {
|
|
|
- /* Fill in an TaskStatus_t structure with information on each
|
|
|
- task in the Ready state. */
|
|
|
- do
|
|
|
- {
|
|
|
- uxQueue--;
|
|
|
- uxTask += prvListTaskWithinSingleList( &( pxTaskStatusArray[ uxTask ] ), &( pxReadyTasksLists[ uxQueue ] ), eReady );
|
|
|
-
|
|
|
- } while( uxQueue > ( UBaseType_t ) tskIDLE_PRIORITY ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
-
|
|
|
- /* Fill in an TaskStatus_t structure with information on each
|
|
|
- task in the Blocked state. */
|
|
|
- uxTask += prvListTaskWithinSingleList( &( pxTaskStatusArray[ uxTask ] ), ( List_t * ) pxDelayedTaskList, eBlocked );
|
|
|
- uxTask += prvListTaskWithinSingleList( &( pxTaskStatusArray[ uxTask ] ), ( List_t * ) pxOverflowDelayedTaskList, eBlocked );
|
|
|
-
|
|
|
- #if( INCLUDE_vTaskDelete == 1 )
|
|
|
- {
|
|
|
- /* Fill in an TaskStatus_t structure with information on
|
|
|
- each task that has been deleted but not yet cleaned up. */
|
|
|
- uxTask += prvListTaskWithinSingleList( &( pxTaskStatusArray[ uxTask ] ), &xTasksWaitingTermination, eDeleted );
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
- {
|
|
|
- /* Fill in an TaskStatus_t structure with information on
|
|
|
- each task in the Suspended state. */
|
|
|
- uxTask += prvListTaskWithinSingleList( &( pxTaskStatusArray[ uxTask ] ), &xSuspendedTaskList, eSuspended );
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- #if ( configGENERATE_RUN_TIME_STATS == 1)
|
|
|
- {
|
|
|
- if( pulTotalRunTime != NULL )
|
|
|
- {
|
|
|
- #ifdef portALT_GET_RUN_TIME_COUNTER_VALUE
|
|
|
- portALT_GET_RUN_TIME_COUNTER_VALUE( ( *pulTotalRunTime ) );
|
|
|
- #else
|
|
|
- *pulTotalRunTime = portGET_RUN_TIME_COUNTER_VALUE();
|
|
|
- #endif
|
|
|
- }
|
|
|
- }
|
|
|
- #else
|
|
|
- {
|
|
|
- if( pulTotalRunTime != NULL )
|
|
|
- {
|
|
|
- *pulTotalRunTime = 0;
|
|
|
- }
|
|
|
- }
|
|
|
- #endif
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- ( void ) xTaskResumeAll();
|
|
|
-
|
|
|
- return uxTask;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_TRACE_FACILITY */
|
|
|
-/*----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_xTaskGetIdleTaskHandle == 1 )
|
|
|
-
|
|
|
- TaskHandle_t xTaskGetIdleTaskHandle( void )
|
|
|
- {
|
|
|
- /* If xTaskGetIdleTaskHandle() is called before the scheduler has been
|
|
|
- started, then xIdleTaskHandle will be NULL. */
|
|
|
- configASSERT( ( xIdleTaskHandle != NULL ) );
|
|
|
- return xIdleTaskHandle;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* INCLUDE_xTaskGetIdleTaskHandle */
|
|
|
-/*----------------------------------------------------------*/
|
|
|
-
|
|
|
-/* This conditional compilation should use inequality to 0, not equality to 1.
|
|
|
-This is to ensure vTaskStepTick() is available when user defined low power mode
|
|
|
-implementations require configUSE_TICKLESS_IDLE to be set to a value other than
|
|
|
-1. */
|
|
|
-#if ( configUSE_TICKLESS_IDLE != 0 )
|
|
|
-
|
|
|
- void vTaskStepTick( const TickType_t xTicksToJump )
|
|
|
- {
|
|
|
- /* Correct the tick count value after a period during which the tick
|
|
|
- was suppressed. Note this does *not* call the tick hook function for
|
|
|
- each stepped tick. */
|
|
|
- configASSERT( ( xTickCount + xTicksToJump ) <= xNextTaskUnblockTime );
|
|
|
- xTickCount += xTicksToJump;
|
|
|
- traceINCREASE_TICK_COUNT( xTicksToJump );
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_TICKLESS_IDLE */
|
|
|
-/*----------------------------------------------------------*/
|
|
|
-
|
|
|
-BaseType_t xTaskIncrementTick( void )
|
|
|
-{
|
|
|
-TCB_t * pxTCB;
|
|
|
-TickType_t xItemValue;
|
|
|
-BaseType_t xSwitchRequired = pdFALSE;
|
|
|
-
|
|
|
- /* Called by the portable layer each time a tick interrupt occurs.
|
|
|
- Increments the tick then checks to see if the new tick value will cause any
|
|
|
- tasks to be unblocked. */
|
|
|
- traceTASK_INCREMENT_TICK( xTickCount );
|
|
|
- if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
- {
|
|
|
- /* Increment the RTOS tick, switching the delayed and overflowed
|
|
|
- delayed lists if it wraps to 0. */
|
|
|
- ++xTickCount;
|
|
|
-
|
|
|
- {
|
|
|
- /* Minor optimisation. The tick count cannot change in this
|
|
|
- block. */
|
|
|
- const TickType_t xConstTickCount = xTickCount;
|
|
|
-
|
|
|
- if( xConstTickCount == ( TickType_t ) 0U )
|
|
|
- {
|
|
|
- taskSWITCH_DELAYED_LISTS();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* See if this tick has made a timeout expire. Tasks are stored in
|
|
|
- the queue in the order of their wake time - meaning once one task
|
|
|
- has been found whose block time has not expired there is no need to
|
|
|
- look any further down the list. */
|
|
|
- if( xConstTickCount >= xNextTaskUnblockTime )
|
|
|
- {
|
|
|
- for( ;; )
|
|
|
- {
|
|
|
- if( listLIST_IS_EMPTY( pxDelayedTaskList ) != pdFALSE )
|
|
|
- {
|
|
|
- /* The delayed list is empty. Set xNextTaskUnblockTime
|
|
|
- to the maximum possible value so it is extremely
|
|
|
- unlikely that the
|
|
|
- if( xTickCount >= xNextTaskUnblockTime ) test will pass
|
|
|
- next time through. */
|
|
|
- xNextTaskUnblockTime = portMAX_DELAY;
|
|
|
- break;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The delayed list is not empty, get the value of the
|
|
|
- item at the head of the delayed list. This is the time
|
|
|
- at which the task at the head of the delayed list must
|
|
|
- be removed from the Blocked state. */
|
|
|
- pxTCB = ( TCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( pxDelayedTaskList );
|
|
|
- xItemValue = listGET_LIST_ITEM_VALUE( &( pxTCB->xGenericListItem ) );
|
|
|
-
|
|
|
- if( xConstTickCount < xItemValue )
|
|
|
- {
|
|
|
- /* It is not time to unblock this item yet, but the
|
|
|
- item value is the time at which the task at the head
|
|
|
- of the blocked list must be removed from the Blocked
|
|
|
- state - so record the item value in
|
|
|
- xNextTaskUnblockTime. */
|
|
|
- xNextTaskUnblockTime = xItemValue;
|
|
|
- break;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* It is time to remove the item from the Blocked state. */
|
|
|
- ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
-
|
|
|
- /* Is the task waiting on an event also? If so remove
|
|
|
- it from the event list. */
|
|
|
- if( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) != NULL )
|
|
|
- {
|
|
|
- ( void ) uxListRemove( &( pxTCB->xEventListItem ) );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* Place the unblocked task into the appropriate ready
|
|
|
- list. */
|
|
|
- prvAddTaskToReadyList( pxTCB );
|
|
|
-
|
|
|
- /* A task being unblocked cannot cause an immediate
|
|
|
- context switch if preemption is turned off. */
|
|
|
- #if ( configUSE_PREEMPTION == 1 )
|
|
|
- {
|
|
|
- /* Preemption is on, but a context switch should
|
|
|
- only be performed if the unblocked task has a
|
|
|
- priority that is equal to or higher than the
|
|
|
- currently executing task. */
|
|
|
- if( pxTCB->uxPriority >= pxCurrentTCB->uxPriority )
|
|
|
- {
|
|
|
- xSwitchRequired = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- #endif /* configUSE_PREEMPTION */
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* Tasks of equal priority to the currently running task will share
|
|
|
- processing time (time slice) if preemption is on, and the application
|
|
|
- writer has not explicitly turned time slicing off. */
|
|
|
- #if ( ( configUSE_PREEMPTION == 1 ) && ( configUSE_TIME_SLICING == 1 ) )
|
|
|
- {
|
|
|
- if( listCURRENT_LIST_LENGTH( &( pxReadyTasksLists[ pxCurrentTCB->uxPriority ] ) ) > ( UBaseType_t ) 1 )
|
|
|
- {
|
|
|
- xSwitchRequired = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- #endif /* ( ( configUSE_PREEMPTION == 1 ) && ( configUSE_TIME_SLICING == 1 ) ) */
|
|
|
-
|
|
|
- #if ( configUSE_TICK_HOOK == 1 )
|
|
|
- {
|
|
|
- /* Guard against the tick hook being called when the pended tick
|
|
|
- count is being unwound (when the scheduler is being unlocked). */
|
|
|
- if( uxPendedTicks == ( UBaseType_t ) 0U )
|
|
|
- {
|
|
|
- vApplicationTickHook();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- #endif /* configUSE_TICK_HOOK */
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- ++uxPendedTicks;
|
|
|
-
|
|
|
- /* The tick hook gets called at regular intervals, even if the
|
|
|
- scheduler is locked. */
|
|
|
- #if ( configUSE_TICK_HOOK == 1 )
|
|
|
- {
|
|
|
- vApplicationTickHook();
|
|
|
- }
|
|
|
- #endif
|
|
|
- }
|
|
|
-
|
|
|
- #if ( configUSE_PREEMPTION == 1 )
|
|
|
- {
|
|
|
- if( xYieldPending != pdFALSE )
|
|
|
- {
|
|
|
- xSwitchRequired = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- #endif /* configUSE_PREEMPTION */
|
|
|
-
|
|
|
- return xSwitchRequired;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( configUSE_APPLICATION_TASK_TAG == 1 )
|
|
|
-
|
|
|
- void vTaskSetApplicationTaskTag( TaskHandle_t xTask, TaskHookFunction_t pxHookFunction )
|
|
|
- {
|
|
|
- TCB_t *xTCB;
|
|
|
-
|
|
|
- /* If xTask is NULL then it is the task hook of the calling task that is
|
|
|
- getting set. */
|
|
|
- if( xTask == NULL )
|
|
|
- {
|
|
|
- xTCB = ( TCB_t * ) pxCurrentTCB;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- xTCB = ( TCB_t * ) xTask;
|
|
|
- }
|
|
|
-
|
|
|
- /* Save the hook function in the TCB. A critical section is required as
|
|
|
- the value can be accessed from an interrupt. */
|
|
|
- taskENTER_CRITICAL();
|
|
|
- xTCB->pxTaskTag = pxHookFunction;
|
|
|
- taskEXIT_CRITICAL();
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_APPLICATION_TASK_TAG */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( configUSE_APPLICATION_TASK_TAG == 1 )
|
|
|
-
|
|
|
- TaskHookFunction_t xTaskGetApplicationTaskTag( TaskHandle_t xTask )
|
|
|
- {
|
|
|
- TCB_t *xTCB;
|
|
|
- TaskHookFunction_t xReturn;
|
|
|
-
|
|
|
- /* If xTask is NULL then we are setting our own task hook. */
|
|
|
- if( xTask == NULL )
|
|
|
- {
|
|
|
- xTCB = ( TCB_t * ) pxCurrentTCB;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- xTCB = ( TCB_t * ) xTask;
|
|
|
- }
|
|
|
-
|
|
|
- /* Save the hook function in the TCB. A critical section is required as
|
|
|
- the value can be accessed from an interrupt. */
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- xReturn = xTCB->pxTaskTag;
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- return xReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_APPLICATION_TASK_TAG */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( configUSE_APPLICATION_TASK_TAG == 1 )
|
|
|
-
|
|
|
- BaseType_t xTaskCallApplicationTaskHook( TaskHandle_t xTask, void *pvParameter )
|
|
|
- {
|
|
|
- TCB_t *xTCB;
|
|
|
- BaseType_t xReturn;
|
|
|
-
|
|
|
- /* If xTask is NULL then we are calling our own task hook. */
|
|
|
- if( xTask == NULL )
|
|
|
- {
|
|
|
- xTCB = ( TCB_t * ) pxCurrentTCB;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- xTCB = ( TCB_t * ) xTask;
|
|
|
- }
|
|
|
-
|
|
|
- if( xTCB->pxTaskTag != NULL )
|
|
|
- {
|
|
|
- xReturn = xTCB->pxTaskTag( pvParameter );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- xReturn = pdFAIL;
|
|
|
- }
|
|
|
-
|
|
|
- return xReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_APPLICATION_TASK_TAG */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-void vTaskSwitchContext( void )
|
|
|
-{
|
|
|
- if( uxSchedulerSuspended != ( UBaseType_t ) pdFALSE )
|
|
|
- {
|
|
|
- /* The scheduler is currently suspended - do not allow a context
|
|
|
- switch. */
|
|
|
- xYieldPending = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- xYieldPending = pdFALSE;
|
|
|
- traceTASK_SWITCHED_OUT();
|
|
|
-
|
|
|
- #if ( configGENERATE_RUN_TIME_STATS == 1 )
|
|
|
- {
|
|
|
- #ifdef portALT_GET_RUN_TIME_COUNTER_VALUE
|
|
|
- portALT_GET_RUN_TIME_COUNTER_VALUE( ulTotalRunTime );
|
|
|
- #else
|
|
|
- ulTotalRunTime = portGET_RUN_TIME_COUNTER_VALUE();
|
|
|
- #endif
|
|
|
-
|
|
|
- /* Add the amount of time the task has been running to the
|
|
|
- accumulated time so far. The time the task started running was
|
|
|
- stored in ulTaskSwitchedInTime. Note that there is no overflow
|
|
|
- protection here so count values are only valid until the timer
|
|
|
- overflows. The guard against negative values is to protect
|
|
|
- against suspect run time stat counter implementations - which
|
|
|
- are provided by the application, not the kernel. */
|
|
|
- if( ulTotalRunTime > ulTaskSwitchedInTime )
|
|
|
- {
|
|
|
- pxCurrentTCB->ulRunTimeCounter += ( ulTotalRunTime - ulTaskSwitchedInTime );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- ulTaskSwitchedInTime = ulTotalRunTime;
|
|
|
- }
|
|
|
- #endif /* configGENERATE_RUN_TIME_STATS */
|
|
|
-
|
|
|
- /* Check for stack overflow, if configured. */
|
|
|
- taskFIRST_CHECK_FOR_STACK_OVERFLOW();
|
|
|
- taskSECOND_CHECK_FOR_STACK_OVERFLOW();
|
|
|
-
|
|
|
- /* Select a new task to run using either the generic C or port
|
|
|
- optimised asm code. */
|
|
|
- taskSELECT_HIGHEST_PRIORITY_TASK();
|
|
|
- traceTASK_SWITCHED_IN();
|
|
|
-
|
|
|
- #if ( configUSE_NEWLIB_REENTRANT == 1 )
|
|
|
- {
|
|
|
- /* Switch Newlib's _impure_ptr variable to point to the _reent
|
|
|
- structure specific to this task. */
|
|
|
- _impure_ptr = &( pxCurrentTCB->xNewLib_reent );
|
|
|
- }
|
|
|
- #endif /* configUSE_NEWLIB_REENTRANT */
|
|
|
- }
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-void vTaskPlaceOnEventList( List_t * const pxEventList, const TickType_t xTicksToWait )
|
|
|
-{
|
|
|
-TickType_t xTimeToWake;
|
|
|
-
|
|
|
- configASSERT( pxEventList );
|
|
|
-
|
|
|
- /* THIS FUNCTION MUST BE CALLED WITH EITHER INTERRUPTS DISABLED OR THE
|
|
|
- SCHEDULER SUSPENDED AND THE QUEUE BEING ACCESSED LOCKED. */
|
|
|
-
|
|
|
- /* Place the event list item of the TCB in the appropriate event list.
|
|
|
- This is placed in the list in priority order so the highest priority task
|
|
|
- is the first to be woken by the event. The queue that contains the event
|
|
|
- list is locked, preventing simultaneous access from interrupts. */
|
|
|
- vListInsert( pxEventList, &( pxCurrentTCB->xEventListItem ) );
|
|
|
-
|
|
|
- /* The task must be removed from from the ready list before it is added to
|
|
|
- the blocked list as the same list item is used for both lists. Exclusive
|
|
|
- access to the ready lists guaranteed because the scheduler is locked. */
|
|
|
- if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- /* The current task must be in a ready list, so there is no need to
|
|
|
- check, and the port reset macro can be called directly. */
|
|
|
- portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
- {
|
|
|
- if( xTicksToWait == portMAX_DELAY )
|
|
|
- {
|
|
|
- /* Add the task to the suspended task list instead of a delayed task
|
|
|
- list to ensure the task is not woken by a timing event. It will
|
|
|
- block indefinitely. */
|
|
|
- vListInsertEnd( &xSuspendedTaskList, &( pxCurrentTCB->xGenericListItem ) );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* Calculate the time at which the task should be woken if the event
|
|
|
- does not occur. This may overflow but this doesn't matter, the
|
|
|
- scheduler will handle it. */
|
|
|
- xTimeToWake = xTickCount + xTicksToWait;
|
|
|
- prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
- }
|
|
|
- }
|
|
|
- #else /* INCLUDE_vTaskSuspend */
|
|
|
- {
|
|
|
- /* Calculate the time at which the task should be woken if the event does
|
|
|
- not occur. This may overflow but this doesn't matter, the scheduler
|
|
|
- will handle it. */
|
|
|
- xTimeToWake = xTickCount + xTicksToWait;
|
|
|
- prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
- }
|
|
|
- #endif /* INCLUDE_vTaskSuspend */
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-void vTaskPlaceOnUnorderedEventList( List_t * pxEventList, const TickType_t xItemValue, const TickType_t xTicksToWait )
|
|
|
-{
|
|
|
-TickType_t xTimeToWake;
|
|
|
-
|
|
|
- configASSERT( pxEventList );
|
|
|
-
|
|
|
- /* THIS FUNCTION MUST BE CALLED WITH THE SCHEDULER SUSPENDED. It is used by
|
|
|
- the event groups implementation. */
|
|
|
- configASSERT( uxSchedulerSuspended != 0 );
|
|
|
-
|
|
|
- /* Store the item value in the event list item. It is safe to access the
|
|
|
- event list item here as interrupts won't access the event list item of a
|
|
|
- task that is not in the Blocked state. */
|
|
|
- listSET_LIST_ITEM_VALUE( &( pxCurrentTCB->xEventListItem ), xItemValue | taskEVENT_LIST_ITEM_VALUE_IN_USE );
|
|
|
-
|
|
|
- /* Place the event list item of the TCB at the end of the appropriate event
|
|
|
- list. It is safe to access the event list here because it is part of an
|
|
|
- event group implementation - and interrupts don't access event groups
|
|
|
- directly (instead they access them indirectly by pending function calls to
|
|
|
- the task level). */
|
|
|
- vListInsertEnd( pxEventList, &( pxCurrentTCB->xEventListItem ) );
|
|
|
-
|
|
|
- /* The task must be removed from the ready list before it is added to the
|
|
|
- blocked list. Exclusive access can be assured to the ready list as the
|
|
|
- scheduler is locked. */
|
|
|
- if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- /* The current task must be in a ready list, so there is no need to
|
|
|
- check, and the port reset macro can be called directly. */
|
|
|
- portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
- {
|
|
|
- if( xTicksToWait == portMAX_DELAY )
|
|
|
- {
|
|
|
- /* Add the task to the suspended task list instead of a delayed task
|
|
|
- list to ensure it is not woken by a timing event. It will block
|
|
|
- indefinitely. */
|
|
|
- vListInsertEnd( &xSuspendedTaskList, &( pxCurrentTCB->xGenericListItem ) );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* Calculate the time at which the task should be woken if the event
|
|
|
- does not occur. This may overflow but this doesn't matter, the
|
|
|
- kernel will manage it correctly. */
|
|
|
- xTimeToWake = xTickCount + xTicksToWait;
|
|
|
- prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
- }
|
|
|
- }
|
|
|
- #else /* INCLUDE_vTaskSuspend */
|
|
|
- {
|
|
|
- /* Calculate the time at which the task should be woken if the event does
|
|
|
- not occur. This may overflow but this doesn't matter, the kernel
|
|
|
- will manage it correctly. */
|
|
|
- xTimeToWake = xTickCount + xTicksToWait;
|
|
|
- prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
- }
|
|
|
- #endif /* INCLUDE_vTaskSuspend */
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if configUSE_TIMERS == 1
|
|
|
-
|
|
|
- void vTaskPlaceOnEventListRestricted( List_t * const pxEventList, const TickType_t xTicksToWait )
|
|
|
- {
|
|
|
- TickType_t xTimeToWake;
|
|
|
-
|
|
|
- configASSERT( pxEventList );
|
|
|
-
|
|
|
- /* This function should not be called by application code hence the
|
|
|
- 'Restricted' in its name. It is not part of the public API. It is
|
|
|
- designed for use by kernel code, and has special calling requirements -
|
|
|
- it should be called from a critical section. */
|
|
|
-
|
|
|
-
|
|
|
- /* Place the event list item of the TCB in the appropriate event list.
|
|
|
- In this case it is assume that this is the only task that is going to
|
|
|
- be waiting on this event list, so the faster vListInsertEnd() function
|
|
|
- can be used in place of vListInsert. */
|
|
|
- vListInsertEnd( pxEventList, &( pxCurrentTCB->xEventListItem ) );
|
|
|
-
|
|
|
- /* We must remove this task from the ready list before adding it to the
|
|
|
- blocked list as the same list item is used for both lists. This
|
|
|
- function is called form a critical section. */
|
|
|
- if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- /* The current task must be in a ready list, so there is no need to
|
|
|
- check, and the port reset macro can be called directly. */
|
|
|
- portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* Calculate the time at which the task should be woken if the event does
|
|
|
- not occur. This may overflow but this doesn't matter. */
|
|
|
- xTimeToWake = xTickCount + xTicksToWait;
|
|
|
-
|
|
|
- traceTASK_DELAY_UNTIL();
|
|
|
- prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_TIMERS */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-BaseType_t xTaskRemoveFromEventList( const List_t * const pxEventList )
|
|
|
-{
|
|
|
-TCB_t *pxUnblockedTCB;
|
|
|
-BaseType_t xReturn;
|
|
|
-
|
|
|
- /* THIS FUNCTION MUST BE CALLED FROM A CRITICAL SECTION. It can also be
|
|
|
- called from a critical section within an ISR. */
|
|
|
-
|
|
|
- /* The event list is sorted in priority order, so the first in the list can
|
|
|
- be removed as it is known to be the highest priority. Remove the TCB from
|
|
|
- the delayed list, and add it to the ready list.
|
|
|
-
|
|
|
- If an event is for a queue that is locked then this function will never
|
|
|
- get called - the lock count on the queue will get modified instead. This
|
|
|
- means exclusive access to the event list is guaranteed here.
|
|
|
-
|
|
|
- This function assumes that a check has already been made to ensure that
|
|
|
- pxEventList is not empty. */
|
|
|
- pxUnblockedTCB = ( TCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( pxEventList );
|
|
|
- configASSERT( pxUnblockedTCB );
|
|
|
- ( void ) uxListRemove( &( pxUnblockedTCB->xEventListItem ) );
|
|
|
-
|
|
|
- if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
- {
|
|
|
- ( void ) uxListRemove( &( pxUnblockedTCB->xGenericListItem ) );
|
|
|
- prvAddTaskToReadyList( pxUnblockedTCB );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The delayed and ready lists cannot be accessed, so hold this task
|
|
|
- pending until the scheduler is resumed. */
|
|
|
- vListInsertEnd( &( xPendingReadyList ), &( pxUnblockedTCB->xEventListItem ) );
|
|
|
- }
|
|
|
-
|
|
|
- if( pxUnblockedTCB->uxPriority > pxCurrentTCB->uxPriority )
|
|
|
- {
|
|
|
- /* Return true if the task removed from the event list has a higher
|
|
|
- priority than the calling task. This allows the calling task to know if
|
|
|
- it should force a context switch now. */
|
|
|
- xReturn = pdTRUE;
|
|
|
-
|
|
|
- /* Mark that a yield is pending in case the user is not using the
|
|
|
- "xHigherPriorityTaskWoken" parameter to an ISR safe FreeRTOS function. */
|
|
|
- xYieldPending = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- xReturn = pdFALSE;
|
|
|
- }
|
|
|
-
|
|
|
- #if( configUSE_TICKLESS_IDLE == 1 )
|
|
|
- {
|
|
|
- /* If a task is blocked on a kernel object then xNextTaskUnblockTime
|
|
|
- might be set to the blocked task's time out time. If the task is
|
|
|
- unblocked for a reason other than a timeout xNextTaskUnblockTime is
|
|
|
- normally left unchanged, because it is automatically get reset to a new
|
|
|
- value when the tick count equals xNextTaskUnblockTime. However if
|
|
|
- tickless idling is used it might be more important to enter sleep mode
|
|
|
- at the earliest possible time - so reset xNextTaskUnblockTime here to
|
|
|
- ensure it is updated at the earliest possible time. */
|
|
|
- prvResetNextTaskUnblockTime();
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- return xReturn;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-BaseType_t xTaskRemoveFromUnorderedEventList( ListItem_t * pxEventListItem, const TickType_t xItemValue )
|
|
|
-{
|
|
|
-TCB_t *pxUnblockedTCB;
|
|
|
-BaseType_t xReturn;
|
|
|
-
|
|
|
- /* THIS FUNCTION MUST BE CALLED WITH THE SCHEDULER SUSPENDED. It is used by
|
|
|
- the event flags implementation. */
|
|
|
- configASSERT( uxSchedulerSuspended != pdFALSE );
|
|
|
-
|
|
|
- /* Store the new item value in the event list. */
|
|
|
- listSET_LIST_ITEM_VALUE( pxEventListItem, xItemValue | taskEVENT_LIST_ITEM_VALUE_IN_USE );
|
|
|
-
|
|
|
- /* Remove the event list form the event flag. Interrupts do not access
|
|
|
- event flags. */
|
|
|
- pxUnblockedTCB = ( TCB_t * ) listGET_LIST_ITEM_OWNER( pxEventListItem );
|
|
|
- configASSERT( pxUnblockedTCB );
|
|
|
- ( void ) uxListRemove( pxEventListItem );
|
|
|
-
|
|
|
- /* Remove the task from the delayed list and add it to the ready list. The
|
|
|
- scheduler is suspended so interrupts will not be accessing the ready
|
|
|
- lists. */
|
|
|
- ( void ) uxListRemove( &( pxUnblockedTCB->xGenericListItem ) );
|
|
|
- prvAddTaskToReadyList( pxUnblockedTCB );
|
|
|
-
|
|
|
- if( pxUnblockedTCB->uxPriority > pxCurrentTCB->uxPriority )
|
|
|
- {
|
|
|
- /* Return true if the task removed from the event list has
|
|
|
- a higher priority than the calling task. This allows
|
|
|
- the calling task to know if it should force a context
|
|
|
- switch now. */
|
|
|
- xReturn = pdTRUE;
|
|
|
-
|
|
|
- /* Mark that a yield is pending in case the user is not using the
|
|
|
- "xHigherPriorityTaskWoken" parameter to an ISR safe FreeRTOS function. */
|
|
|
- xYieldPending = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- xReturn = pdFALSE;
|
|
|
- }
|
|
|
-
|
|
|
- return xReturn;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-void vTaskSetTimeOutState( TimeOut_t * const pxTimeOut )
|
|
|
-{
|
|
|
- configASSERT( pxTimeOut );
|
|
|
- pxTimeOut->xOverflowCount = xNumOfOverflows;
|
|
|
- pxTimeOut->xTimeOnEntering = xTickCount;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-BaseType_t xTaskCheckForTimeOut( TimeOut_t * const pxTimeOut, TickType_t * const pxTicksToWait )
|
|
|
-{
|
|
|
-BaseType_t xReturn;
|
|
|
-
|
|
|
- configASSERT( pxTimeOut );
|
|
|
- configASSERT( pxTicksToWait );
|
|
|
-
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- /* Minor optimisation. The tick count cannot change in this block. */
|
|
|
- const TickType_t xConstTickCount = xTickCount;
|
|
|
-
|
|
|
- #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
- /* If INCLUDE_vTaskSuspend is set to 1 and the block time specified is
|
|
|
- the maximum block time then the task should block indefinitely, and
|
|
|
- therefore never time out. */
|
|
|
- if( *pxTicksToWait == portMAX_DELAY )
|
|
|
- {
|
|
|
- xReturn = pdFALSE;
|
|
|
- }
|
|
|
- else /* We are not blocking indefinitely, perform the checks below. */
|
|
|
- #endif
|
|
|
-
|
|
|
- if( ( xNumOfOverflows != pxTimeOut->xOverflowCount ) && ( xConstTickCount >= pxTimeOut->xTimeOnEntering ) ) /*lint !e525 Indentation preferred as is to make code within pre-processor directives clearer. */
|
|
|
- {
|
|
|
- /* The tick count is greater than the time at which vTaskSetTimeout()
|
|
|
- was called, but has also overflowed since vTaskSetTimeOut() was called.
|
|
|
- It must have wrapped all the way around and gone past us again. This
|
|
|
- passed since vTaskSetTimeout() was called. */
|
|
|
- xReturn = pdTRUE;
|
|
|
- }
|
|
|
- else if( ( xConstTickCount - pxTimeOut->xTimeOnEntering ) < *pxTicksToWait )
|
|
|
- {
|
|
|
- /* Not a genuine timeout. Adjust parameters for time remaining. */
|
|
|
- *pxTicksToWait -= ( xConstTickCount - pxTimeOut->xTimeOnEntering );
|
|
|
- vTaskSetTimeOutState( pxTimeOut );
|
|
|
- xReturn = pdFALSE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- xReturn = pdTRUE;
|
|
|
- }
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- return xReturn;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-void vTaskMissedYield( void )
|
|
|
-{
|
|
|
- xYieldPending = pdTRUE;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
-
|
|
|
- UBaseType_t uxTaskGetTaskNumber( TaskHandle_t xTask )
|
|
|
- {
|
|
|
- UBaseType_t uxReturn;
|
|
|
- TCB_t *pxTCB;
|
|
|
-
|
|
|
- if( xTask != NULL )
|
|
|
- {
|
|
|
- pxTCB = ( TCB_t * ) xTask;
|
|
|
- uxReturn = pxTCB->uxTaskNumber;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- uxReturn = 0U;
|
|
|
- }
|
|
|
-
|
|
|
- return uxReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_TRACE_FACILITY */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
-
|
|
|
- void vTaskSetTaskNumber( TaskHandle_t xTask, const UBaseType_t uxHandle )
|
|
|
- {
|
|
|
- TCB_t *pxTCB;
|
|
|
-
|
|
|
- if( xTask != NULL )
|
|
|
- {
|
|
|
- pxTCB = ( TCB_t * ) xTask;
|
|
|
- pxTCB->uxTaskNumber = uxHandle;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_TRACE_FACILITY */
|
|
|
-
|
|
|
-/*
|
|
|
- * -----------------------------------------------------------
|
|
|
- * The Idle task.
|
|
|
- * ----------------------------------------------------------
|
|
|
- *
|
|
|
- * The portTASK_FUNCTION() macro is used to allow port/compiler specific
|
|
|
- * language extensions. The equivalent prototype for this function is:
|
|
|
- *
|
|
|
- * void prvIdleTask( void *pvParameters );
|
|
|
- *
|
|
|
- */
|
|
|
-static portTASK_FUNCTION( prvIdleTask, pvParameters )
|
|
|
-{
|
|
|
- /* Stop warnings. */
|
|
|
- ( void ) pvParameters;
|
|
|
-
|
|
|
- for( ;; )
|
|
|
- {
|
|
|
- /* See if any tasks have been deleted. */
|
|
|
- prvCheckTasksWaitingTermination();
|
|
|
-
|
|
|
- #if ( configUSE_PREEMPTION == 0 )
|
|
|
- {
|
|
|
- /* If we are not using preemption we keep forcing a task switch to
|
|
|
- see if any other task has become available. If we are using
|
|
|
- preemption we don't need to do this as any task becoming available
|
|
|
- will automatically get the processor anyway. */
|
|
|
- taskYIELD();
|
|
|
- }
|
|
|
- #endif /* configUSE_PREEMPTION */
|
|
|
-
|
|
|
- #if ( ( configUSE_PREEMPTION == 1 ) && ( configIDLE_SHOULD_YIELD == 1 ) )
|
|
|
- {
|
|
|
- /* When using preemption tasks of equal priority will be
|
|
|
- timesliced. If a task that is sharing the idle priority is ready
|
|
|
- to run then the idle task should yield before the end of the
|
|
|
- timeslice.
|
|
|
-
|
|
|
- A critical region is not required here as we are just reading from
|
|
|
- the list, and an occasional incorrect value will not matter. If
|
|
|
- the ready list at the idle priority contains more than one task
|
|
|
- then a task other than the idle task is ready to execute. */
|
|
|
- if( listCURRENT_LIST_LENGTH( &( pxReadyTasksLists[ tskIDLE_PRIORITY ] ) ) > ( UBaseType_t ) 1 )
|
|
|
- {
|
|
|
- taskYIELD();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- #endif /* ( ( configUSE_PREEMPTION == 1 ) && ( configIDLE_SHOULD_YIELD == 1 ) ) */
|
|
|
-
|
|
|
- #if ( configUSE_IDLE_HOOK == 1 )
|
|
|
- {
|
|
|
- extern void vApplicationIdleHook( void );
|
|
|
-
|
|
|
- /* Call the user defined function from within the idle task. This
|
|
|
- allows the application designer to add background functionality
|
|
|
- without the overhead of a separate task.
|
|
|
- NOTE: vApplicationIdleHook() MUST NOT, UNDER ANY CIRCUMSTANCES,
|
|
|
- CALL A FUNCTION THAT MIGHT BLOCK. */
|
|
|
- vApplicationIdleHook();
|
|
|
- }
|
|
|
- #endif /* configUSE_IDLE_HOOK */
|
|
|
-
|
|
|
- /* This conditional compilation should use inequality to 0, not equality
|
|
|
- to 1. This is to ensure portSUPPRESS_TICKS_AND_SLEEP() is called when
|
|
|
- user defined low power mode implementations require
|
|
|
- configUSE_TICKLESS_IDLE to be set to a value other than 1. */
|
|
|
- #if ( configUSE_TICKLESS_IDLE != 0 )
|
|
|
- {
|
|
|
- TickType_t xExpectedIdleTime;
|
|
|
-
|
|
|
- /* It is not desirable to suspend then resume the scheduler on
|
|
|
- each iteration of the idle task. Therefore, a preliminary
|
|
|
- test of the expected idle time is performed without the
|
|
|
- scheduler suspended. The result here is not necessarily
|
|
|
- valid. */
|
|
|
- xExpectedIdleTime = prvGetExpectedIdleTime();
|
|
|
-
|
|
|
- if( xExpectedIdleTime >= configEXPECTED_IDLE_TIME_BEFORE_SLEEP )
|
|
|
- {
|
|
|
- vTaskSuspendAll();
|
|
|
- {
|
|
|
- /* Now the scheduler is suspended, the expected idle
|
|
|
- time can be sampled again, and this time its value can
|
|
|
- be used. */
|
|
|
- configASSERT( xNextTaskUnblockTime >= xTickCount );
|
|
|
- xExpectedIdleTime = prvGetExpectedIdleTime();
|
|
|
-
|
|
|
- if( xExpectedIdleTime >= configEXPECTED_IDLE_TIME_BEFORE_SLEEP )
|
|
|
- {
|
|
|
- traceLOW_POWER_IDLE_BEGIN();
|
|
|
- portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime );
|
|
|
- traceLOW_POWER_IDLE_END();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- ( void ) xTaskResumeAll();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- #endif /* configUSE_TICKLESS_IDLE */
|
|
|
- }
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if configUSE_TICKLESS_IDLE != 0
|
|
|
-
|
|
|
- eSleepModeStatus eTaskConfirmSleepModeStatus( void )
|
|
|
- {
|
|
|
- eSleepModeStatus eReturn = eStandardSleep;
|
|
|
-
|
|
|
- if( listCURRENT_LIST_LENGTH( &xPendingReadyList ) != 0 )
|
|
|
- {
|
|
|
- /* A task was made ready while the scheduler was suspended. */
|
|
|
- eReturn = eAbortSleep;
|
|
|
- }
|
|
|
- else if( xYieldPending != pdFALSE )
|
|
|
- {
|
|
|
- /* A yield was pended while the scheduler was suspended. */
|
|
|
- eReturn = eAbortSleep;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- #if configUSE_TIMERS == 0
|
|
|
- {
|
|
|
- /* The idle task exists in addition to the application tasks. */
|
|
|
- const UBaseType_t uxNonApplicationTasks = 1;
|
|
|
-
|
|
|
- /* If timers are not being used and all the tasks are in the
|
|
|
- suspended list (which might mean they have an infinite block
|
|
|
- time rather than actually being suspended) then it is safe to
|
|
|
- turn all clocks off and just wait for external interrupts. */
|
|
|
- if( listCURRENT_LIST_LENGTH( &xSuspendedTaskList ) == ( uxCurrentNumberOfTasks - uxNonApplicationTasks ) )
|
|
|
- {
|
|
|
- eReturn = eNoTasksWaitingTimeout;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- #endif /* configUSE_TIMERS */
|
|
|
- }
|
|
|
-
|
|
|
- return eReturn;
|
|
|
- }
|
|
|
-#endif /* configUSE_TICKLESS_IDLE */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-static void prvInitialiseTCBVariables( TCB_t * const pxTCB, const char * const pcName, UBaseType_t uxPriority, const MemoryRegion_t * const xRegions, const uint16_t usStackDepth ) /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
|
|
|
-{
|
|
|
-UBaseType_t x;
|
|
|
-
|
|
|
- /* Store the task name in the TCB. */
|
|
|
- for( x = ( UBaseType_t ) 0; x < ( UBaseType_t ) configMAX_TASK_NAME_LEN; x++ )
|
|
|
- {
|
|
|
- pxTCB->pcTaskName[ x ] = pcName[ x ];
|
|
|
-
|
|
|
- /* Don't copy all configMAX_TASK_NAME_LEN if the string is shorter than
|
|
|
- configMAX_TASK_NAME_LEN characters just in case the memory after the
|
|
|
- string is not accessible (extremely unlikely). */
|
|
|
- if( pcName[ x ] == 0x00 )
|
|
|
- {
|
|
|
- break;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /* Ensure the name string is terminated in the case that the string length
|
|
|
- was greater or equal to configMAX_TASK_NAME_LEN. */
|
|
|
- pxTCB->pcTaskName[ configMAX_TASK_NAME_LEN - 1 ] = '\0';
|
|
|
-
|
|
|
- /* This is used as an array index so must ensure it's not too large. First
|
|
|
- remove the privilege bit if one is present. */
|
|
|
- if( uxPriority >= ( UBaseType_t ) configMAX_PRIORITIES )
|
|
|
- {
|
|
|
- uxPriority = ( UBaseType_t ) configMAX_PRIORITIES - ( UBaseType_t ) 1U;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- pxTCB->uxPriority = uxPriority;
|
|
|
- #if ( configUSE_MUTEXES == 1 )
|
|
|
- {
|
|
|
- pxTCB->uxBasePriority = uxPriority;
|
|
|
- pxTCB->uxMutexesHeld = 0;
|
|
|
- }
|
|
|
- #endif /* configUSE_MUTEXES */
|
|
|
-
|
|
|
- vListInitialiseItem( &( pxTCB->xGenericListItem ) );
|
|
|
- vListInitialiseItem( &( pxTCB->xEventListItem ) );
|
|
|
-
|
|
|
- /* Set the pxTCB as a link back from the ListItem_t. This is so we can get
|
|
|
- back to the containing TCB from a generic item in a list. */
|
|
|
- listSET_LIST_ITEM_OWNER( &( pxTCB->xGenericListItem ), pxTCB );
|
|
|
-
|
|
|
- /* Event lists are always in priority order. */
|
|
|
- listSET_LIST_ITEM_VALUE( &( pxTCB->xEventListItem ), ( TickType_t ) configMAX_PRIORITIES - ( TickType_t ) uxPriority ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
- listSET_LIST_ITEM_OWNER( &( pxTCB->xEventListItem ), pxTCB );
|
|
|
-
|
|
|
- #if ( portCRITICAL_NESTING_IN_TCB == 1 )
|
|
|
- {
|
|
|
- pxTCB->uxCriticalNesting = ( UBaseType_t ) 0U;
|
|
|
- }
|
|
|
- #endif /* portCRITICAL_NESTING_IN_TCB */
|
|
|
-
|
|
|
- #if ( configUSE_APPLICATION_TASK_TAG == 1 )
|
|
|
- {
|
|
|
- pxTCB->pxTaskTag = NULL;
|
|
|
- }
|
|
|
- #endif /* configUSE_APPLICATION_TASK_TAG */
|
|
|
-
|
|
|
- #if ( configGENERATE_RUN_TIME_STATS == 1 )
|
|
|
- {
|
|
|
- pxTCB->ulRunTimeCounter = 0UL;
|
|
|
- }
|
|
|
- #endif /* configGENERATE_RUN_TIME_STATS */
|
|
|
-
|
|
|
- #if ( portUSING_MPU_WRAPPERS == 1 )
|
|
|
- {
|
|
|
- vPortStoreTaskMPUSettings( &( pxTCB->xMPUSettings ), xRegions, pxTCB->pxStack, usStackDepth );
|
|
|
- }
|
|
|
- #else /* portUSING_MPU_WRAPPERS */
|
|
|
- {
|
|
|
- ( void ) xRegions;
|
|
|
- ( void ) usStackDepth;
|
|
|
- }
|
|
|
- #endif /* portUSING_MPU_WRAPPERS */
|
|
|
-
|
|
|
- #if ( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
- {
|
|
|
- pxTCB->ulNotifiedValue = 0;
|
|
|
- pxTCB->eNotifyState = eNotWaitingNotification;
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- #if ( configUSE_NEWLIB_REENTRANT == 1 )
|
|
|
- {
|
|
|
- /* Initialise this task's Newlib reent structure. */
|
|
|
- _REENT_INIT_PTR( ( &( pxTCB->xNewLib_reent ) ) );
|
|
|
- }
|
|
|
- #endif /* configUSE_NEWLIB_REENTRANT */
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( portUSING_MPU_WRAPPERS == 1 )
|
|
|
-
|
|
|
- void vTaskAllocateMPURegions( TaskHandle_t xTaskToModify, const MemoryRegion_t * const xRegions )
|
|
|
- {
|
|
|
- TCB_t *pxTCB;
|
|
|
-
|
|
|
- /* If null is passed in here then we are deleting ourselves. */
|
|
|
- pxTCB = prvGetTCBFromHandle( xTaskToModify );
|
|
|
-
|
|
|
- vPortStoreTaskMPUSettings( &( pxTCB->xMPUSettings ), xRegions, NULL, 0 );
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* portUSING_MPU_WRAPPERS */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-static void prvInitialiseTaskLists( void )
|
|
|
-{
|
|
|
-UBaseType_t uxPriority;
|
|
|
-
|
|
|
- for( uxPriority = ( UBaseType_t ) 0U; uxPriority < ( UBaseType_t ) configMAX_PRIORITIES; uxPriority++ )
|
|
|
- {
|
|
|
- vListInitialise( &( pxReadyTasksLists[ uxPriority ] ) );
|
|
|
- }
|
|
|
-
|
|
|
- vListInitialise( &xDelayedTaskList1 );
|
|
|
- vListInitialise( &xDelayedTaskList2 );
|
|
|
- vListInitialise( &xPendingReadyList );
|
|
|
-
|
|
|
- #if ( INCLUDE_vTaskDelete == 1 )
|
|
|
- {
|
|
|
- vListInitialise( &xTasksWaitingTermination );
|
|
|
- }
|
|
|
- #endif /* INCLUDE_vTaskDelete */
|
|
|
-
|
|
|
- #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
- {
|
|
|
- vListInitialise( &xSuspendedTaskList );
|
|
|
- }
|
|
|
- #endif /* INCLUDE_vTaskSuspend */
|
|
|
-
|
|
|
- /* Start with pxDelayedTaskList using list1 and the pxOverflowDelayedTaskList
|
|
|
- using list2. */
|
|
|
- pxDelayedTaskList = &xDelayedTaskList1;
|
|
|
- pxOverflowDelayedTaskList = &xDelayedTaskList2;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-static void prvCheckTasksWaitingTermination( void )
|
|
|
-{
|
|
|
- #if ( INCLUDE_vTaskDelete == 1 )
|
|
|
- {
|
|
|
- BaseType_t xListIsEmpty;
|
|
|
-
|
|
|
- /* ucTasksDeleted is used to prevent vTaskSuspendAll() being called
|
|
|
- too often in the idle task. */
|
|
|
- while( uxTasksDeleted > ( UBaseType_t ) 0U )
|
|
|
- {
|
|
|
- vTaskSuspendAll();
|
|
|
- {
|
|
|
- xListIsEmpty = listLIST_IS_EMPTY( &xTasksWaitingTermination );
|
|
|
- }
|
|
|
- ( void ) xTaskResumeAll();
|
|
|
-
|
|
|
- if( xListIsEmpty == pdFALSE )
|
|
|
- {
|
|
|
- TCB_t *pxTCB;
|
|
|
-
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- pxTCB = ( TCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( ( &xTasksWaitingTermination ) );
|
|
|
- ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
- --uxCurrentNumberOfTasks;
|
|
|
- --uxTasksDeleted;
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- prvDeleteTCB( pxTCB );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- #endif /* vTaskDelete */
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-static void prvAddCurrentTaskToDelayedList( const TickType_t xTimeToWake )
|
|
|
-{
|
|
|
- /* The list item will be inserted in wake time order. */
|
|
|
- listSET_LIST_ITEM_VALUE( &( pxCurrentTCB->xGenericListItem ), xTimeToWake );
|
|
|
-
|
|
|
- if( xTimeToWake < xTickCount )
|
|
|
- {
|
|
|
- /* Wake time has overflowed. Place this item in the overflow list. */
|
|
|
- vListInsert( pxOverflowDelayedTaskList, &( pxCurrentTCB->xGenericListItem ) );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The wake time has not overflowed, so the current block list is used. */
|
|
|
- vListInsert( pxDelayedTaskList, &( pxCurrentTCB->xGenericListItem ) );
|
|
|
-
|
|
|
- /* If the task entering the blocked state was placed at the head of the
|
|
|
- list of blocked tasks then xNextTaskUnblockTime needs to be updated
|
|
|
- too. */
|
|
|
- if( xTimeToWake < xNextTaskUnblockTime )
|
|
|
- {
|
|
|
- xNextTaskUnblockTime = xTimeToWake;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-static TCB_t *prvAllocateTCBAndStack( const uint16_t usStackDepth, StackType_t * const puxStackBuffer )
|
|
|
-{
|
|
|
-TCB_t *pxNewTCB;
|
|
|
-
|
|
|
- /* If the stack grows down then allocate the stack then the TCB so the stack
|
|
|
- does not grow into the TCB. Likewise if the stack grows up then allocate
|
|
|
- the TCB then the stack. */
|
|
|
- #if( portSTACK_GROWTH > 0 )
|
|
|
- {
|
|
|
- /* Allocate space for the TCB. Where the memory comes from depends on
|
|
|
- the implementation of the port malloc function. */
|
|
|
- pxNewTCB = ( TCB_t * ) pvPortMalloc( sizeof( TCB_t ) );
|
|
|
-
|
|
|
- if( pxNewTCB != NULL )
|
|
|
- {
|
|
|
- /* Allocate space for the stack used by the task being created.
|
|
|
- The base of the stack memory stored in the TCB so the task can
|
|
|
- be deleted later if required. */
|
|
|
- pxNewTCB->pxStack = ( StackType_t * ) pvPortMallocAligned( ( ( ( size_t ) usStackDepth ) * sizeof( StackType_t ) ), puxStackBuffer ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
-
|
|
|
- if( pxNewTCB->pxStack == NULL )
|
|
|
- {
|
|
|
- /* Could not allocate the stack. Delete the allocated TCB. */
|
|
|
- vPortFree( pxNewTCB );
|
|
|
- pxNewTCB = NULL;
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- #else /* portSTACK_GROWTH */
|
|
|
- {
|
|
|
- StackType_t *pxStack;
|
|
|
-
|
|
|
- /* Allocate space for the stack used by the task being created. */
|
|
|
- pxStack = ( StackType_t * ) pvPortMallocAligned( ( ( ( size_t ) usStackDepth ) * sizeof( StackType_t ) ), puxStackBuffer ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
-
|
|
|
- if( pxStack != NULL )
|
|
|
- {
|
|
|
- /* Allocate space for the TCB. Where the memory comes from depends
|
|
|
- on the implementation of the port malloc function. */
|
|
|
- pxNewTCB = ( TCB_t * ) pvPortMalloc( sizeof( TCB_t ) );
|
|
|
-
|
|
|
- if( pxNewTCB != NULL )
|
|
|
- {
|
|
|
- /* Store the stack location in the TCB. */
|
|
|
- pxNewTCB->pxStack = pxStack;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The stack cannot be used as the TCB was not created. Free it
|
|
|
- again. */
|
|
|
- vPortFree( pxStack );
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- pxNewTCB = NULL;
|
|
|
- }
|
|
|
- }
|
|
|
- #endif /* portSTACK_GROWTH */
|
|
|
-
|
|
|
- if( pxNewTCB != NULL )
|
|
|
- {
|
|
|
- /* Avoid dependency on memset() if it is not required. */
|
|
|
- #if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) || ( configUSE_TRACE_FACILITY == 1 ) || ( INCLUDE_uxTaskGetStackHighWaterMark == 1 ) )
|
|
|
- {
|
|
|
- /* Just to help debugging. */
|
|
|
- ( void ) memset( pxNewTCB->pxStack, ( int ) tskSTACK_FILL_BYTE, ( size_t ) usStackDepth * sizeof( StackType_t ) );
|
|
|
- }
|
|
|
- #endif /* ( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) || ( ( configUSE_TRACE_FACILITY == 1 ) || ( INCLUDE_uxTaskGetStackHighWaterMark == 1 ) ) ) */
|
|
|
- }
|
|
|
-
|
|
|
- return pxNewTCB;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
-
|
|
|
- static UBaseType_t prvListTaskWithinSingleList( TaskStatus_t *pxTaskStatusArray, List_t *pxList, eTaskState eState )
|
|
|
- {
|
|
|
- volatile TCB_t *pxNextTCB, *pxFirstTCB;
|
|
|
- UBaseType_t uxTask = 0;
|
|
|
-
|
|
|
- if( listCURRENT_LIST_LENGTH( pxList ) > ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- listGET_OWNER_OF_NEXT_ENTRY( pxFirstTCB, pxList );
|
|
|
-
|
|
|
- /* Populate an TaskStatus_t structure within the
|
|
|
- pxTaskStatusArray array for each task that is referenced from
|
|
|
- pxList. See the definition of TaskStatus_t in task.h for the
|
|
|
- meaning of each TaskStatus_t structure member. */
|
|
|
- do
|
|
|
- {
|
|
|
- listGET_OWNER_OF_NEXT_ENTRY( pxNextTCB, pxList );
|
|
|
-
|
|
|
- pxTaskStatusArray[ uxTask ].xHandle = ( TaskHandle_t ) pxNextTCB;
|
|
|
- pxTaskStatusArray[ uxTask ].pcTaskName = ( const char * ) &( pxNextTCB->pcTaskName [ 0 ] );
|
|
|
- pxTaskStatusArray[ uxTask ].xTaskNumber = pxNextTCB->uxTCBNumber;
|
|
|
- pxTaskStatusArray[ uxTask ].eCurrentState = eState;
|
|
|
- pxTaskStatusArray[ uxTask ].uxCurrentPriority = pxNextTCB->uxPriority;
|
|
|
-
|
|
|
- #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
- {
|
|
|
- /* If the task is in the suspended list then there is a chance
|
|
|
- it is actually just blocked indefinitely - so really it should
|
|
|
- be reported as being in the Blocked state. */
|
|
|
- if( eState == eSuspended )
|
|
|
- {
|
|
|
- if( listLIST_ITEM_CONTAINER( &( pxNextTCB->xEventListItem ) ) != NULL )
|
|
|
- {
|
|
|
- pxTaskStatusArray[ uxTask ].eCurrentState = eBlocked;
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- #endif /* INCLUDE_vTaskSuspend */
|
|
|
-
|
|
|
- #if ( configUSE_MUTEXES == 1 )
|
|
|
- {
|
|
|
- pxTaskStatusArray[ uxTask ].uxBasePriority = pxNextTCB->uxBasePriority;
|
|
|
- }
|
|
|
- #else
|
|
|
- {
|
|
|
- pxTaskStatusArray[ uxTask ].uxBasePriority = 0;
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- #if ( configGENERATE_RUN_TIME_STATS == 1 )
|
|
|
- {
|
|
|
- pxTaskStatusArray[ uxTask ].ulRunTimeCounter = pxNextTCB->ulRunTimeCounter;
|
|
|
- }
|
|
|
- #else
|
|
|
- {
|
|
|
- pxTaskStatusArray[ uxTask ].ulRunTimeCounter = 0;
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- #if ( portSTACK_GROWTH > 0 )
|
|
|
- {
|
|
|
- pxTaskStatusArray[ uxTask ].usStackHighWaterMark = prvTaskCheckFreeStackSpace( ( uint8_t * ) pxNextTCB->pxEndOfStack );
|
|
|
- }
|
|
|
- #else
|
|
|
- {
|
|
|
- pxTaskStatusArray[ uxTask ].usStackHighWaterMark = prvTaskCheckFreeStackSpace( ( uint8_t * ) pxNextTCB->pxStack );
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- uxTask++;
|
|
|
-
|
|
|
- } while( pxNextTCB != pxFirstTCB );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- return uxTask;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_TRACE_FACILITY */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( ( configUSE_TRACE_FACILITY == 1 ) || ( INCLUDE_uxTaskGetStackHighWaterMark == 1 ) )
|
|
|
-
|
|
|
- static uint16_t prvTaskCheckFreeStackSpace( const uint8_t * pucStackByte )
|
|
|
- {
|
|
|
- uint32_t ulCount = 0U;
|
|
|
-
|
|
|
- while( *pucStackByte == ( uint8_t ) tskSTACK_FILL_BYTE )
|
|
|
- {
|
|
|
- pucStackByte -= portSTACK_GROWTH;
|
|
|
- ulCount++;
|
|
|
- }
|
|
|
-
|
|
|
- ulCount /= ( uint32_t ) sizeof( StackType_t ); /*lint !e961 Casting is not redundant on smaller architectures. */
|
|
|
-
|
|
|
- return ( uint16_t ) ulCount;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* ( ( configUSE_TRACE_FACILITY == 1 ) || ( INCLUDE_uxTaskGetStackHighWaterMark == 1 ) ) */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_uxTaskGetStackHighWaterMark == 1 )
|
|
|
-
|
|
|
- UBaseType_t uxTaskGetStackHighWaterMark( TaskHandle_t xTask )
|
|
|
- {
|
|
|
- TCB_t *pxTCB;
|
|
|
- uint8_t *pucEndOfStack;
|
|
|
- UBaseType_t uxReturn;
|
|
|
-
|
|
|
- pxTCB = prvGetTCBFromHandle( xTask );
|
|
|
-
|
|
|
- #if portSTACK_GROWTH < 0
|
|
|
- {
|
|
|
- pucEndOfStack = ( uint8_t * ) pxTCB->pxStack;
|
|
|
- }
|
|
|
- #else
|
|
|
- {
|
|
|
- pucEndOfStack = ( uint8_t * ) pxTCB->pxEndOfStack;
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- uxReturn = ( UBaseType_t ) prvTaskCheckFreeStackSpace( pucEndOfStack );
|
|
|
-
|
|
|
- return uxReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* INCLUDE_uxTaskGetStackHighWaterMark */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( INCLUDE_vTaskDelete == 1 )
|
|
|
-
|
|
|
- static void prvDeleteTCB( TCB_t *pxTCB )
|
|
|
- {
|
|
|
- /* This call is required specifically for the TriCore port. It must be
|
|
|
- above the vPortFree() calls. The call is also used by ports/demos that
|
|
|
- want to allocate and clean RAM statically. */
|
|
|
- portCLEAN_UP_TCB( pxTCB );
|
|
|
-
|
|
|
- /* Free up the memory allocated by the scheduler for the task. It is up
|
|
|
- to the task to free any memory allocated at the application level. */
|
|
|
- #if ( configUSE_NEWLIB_REENTRANT == 1 )
|
|
|
- {
|
|
|
- _reclaim_reent( &( pxTCB->xNewLib_reent ) );
|
|
|
- }
|
|
|
- #endif /* configUSE_NEWLIB_REENTRANT */
|
|
|
-
|
|
|
- #if( portUSING_MPU_WRAPPERS == 1 )
|
|
|
- {
|
|
|
- /* Only free the stack if it was allocated dynamically in the first
|
|
|
- place. */
|
|
|
- if( pxTCB->xUsingStaticallyAllocatedStack == pdFALSE )
|
|
|
- {
|
|
|
- vPortFreeAligned( pxTCB->pxStack );
|
|
|
- }
|
|
|
- }
|
|
|
- #else
|
|
|
- {
|
|
|
- vPortFreeAligned( pxTCB->pxStack );
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- vPortFree( pxTCB );
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* INCLUDE_vTaskDelete */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-static void prvResetNextTaskUnblockTime( void )
|
|
|
-{
|
|
|
-TCB_t *pxTCB;
|
|
|
-
|
|
|
- if( listLIST_IS_EMPTY( pxDelayedTaskList ) != pdFALSE )
|
|
|
- {
|
|
|
- /* The new current delayed list is empty. Set
|
|
|
- xNextTaskUnblockTime to the maximum possible value so it is
|
|
|
- extremely unlikely that the
|
|
|
- if( xTickCount >= xNextTaskUnblockTime ) test will pass until
|
|
|
- there is an item in the delayed list. */
|
|
|
- xNextTaskUnblockTime = portMAX_DELAY;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The new current delayed list is not empty, get the value of
|
|
|
- the item at the head of the delayed list. This is the time at
|
|
|
- which the task at the head of the delayed list should be removed
|
|
|
- from the Blocked state. */
|
|
|
- ( pxTCB ) = ( TCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( pxDelayedTaskList );
|
|
|
- xNextTaskUnblockTime = listGET_LIST_ITEM_VALUE( &( ( pxTCB )->xGenericListItem ) );
|
|
|
- }
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( ( INCLUDE_xTaskGetCurrentTaskHandle == 1 ) || ( configUSE_MUTEXES == 1 ) )
|
|
|
-
|
|
|
- TaskHandle_t xTaskGetCurrentTaskHandle( void )
|
|
|
- {
|
|
|
- TaskHandle_t xReturn;
|
|
|
-
|
|
|
- /* A critical section is not required as this is not called from
|
|
|
- an interrupt and the current TCB will always be the same for any
|
|
|
- individual execution thread. */
|
|
|
- xReturn = pxCurrentTCB;
|
|
|
-
|
|
|
- return xReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* ( ( INCLUDE_xTaskGetCurrentTaskHandle == 1 ) || ( configUSE_MUTEXES == 1 ) ) */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )
|
|
|
-
|
|
|
- BaseType_t xTaskGetSchedulerState( void )
|
|
|
- {
|
|
|
- BaseType_t xReturn;
|
|
|
-
|
|
|
- if( xSchedulerRunning == pdFALSE )
|
|
|
- {
|
|
|
- xReturn = taskSCHEDULER_NOT_STARTED;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
- {
|
|
|
- xReturn = taskSCHEDULER_RUNNING;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- xReturn = taskSCHEDULER_SUSPENDED;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- return xReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) ) */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( configUSE_MUTEXES == 1 )
|
|
|
-
|
|
|
- void vTaskPriorityInherit( TaskHandle_t const pxMutexHolder )
|
|
|
- {
|
|
|
- TCB_t * const pxTCB = ( TCB_t * ) pxMutexHolder;
|
|
|
-
|
|
|
- /* If the mutex was given back by an interrupt while the queue was
|
|
|
- locked then the mutex holder might now be NULL. */
|
|
|
- if( pxMutexHolder != NULL )
|
|
|
- {
|
|
|
- if( pxTCB->uxPriority < pxCurrentTCB->uxPriority )
|
|
|
- {
|
|
|
- /* Adjust the mutex holder state to account for its new
|
|
|
- priority. Only reset the event list item value if the value is
|
|
|
- not being used for anything else. */
|
|
|
- if( ( listGET_LIST_ITEM_VALUE( &( pxTCB->xEventListItem ) ) & taskEVENT_LIST_ITEM_VALUE_IN_USE ) == 0UL )
|
|
|
- {
|
|
|
- listSET_LIST_ITEM_VALUE( &( pxTCB->xEventListItem ), ( TickType_t ) configMAX_PRIORITIES - ( TickType_t ) pxCurrentTCB->uxPriority ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* If the task being modified is in the ready state it will need to
|
|
|
- be moved into a new list. */
|
|
|
- if( listIS_CONTAINED_WITHIN( &( pxReadyTasksLists[ pxTCB->uxPriority ] ), &( pxTCB->xGenericListItem ) ) != pdFALSE )
|
|
|
- {
|
|
|
- if( uxListRemove( &( pxTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- taskRESET_READY_PRIORITY( pxTCB->uxPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* Inherit the priority before being moved into the new list. */
|
|
|
- pxTCB->uxPriority = pxCurrentTCB->uxPriority;
|
|
|
- prvAddTaskToReadyList( pxTCB );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* Just inherit the priority. */
|
|
|
- pxTCB->uxPriority = pxCurrentTCB->uxPriority;
|
|
|
- }
|
|
|
-
|
|
|
- traceTASK_PRIORITY_INHERIT( pxTCB, pxCurrentTCB->uxPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_MUTEXES */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( configUSE_MUTEXES == 1 )
|
|
|
-
|
|
|
- BaseType_t xTaskPriorityDisinherit( TaskHandle_t const pxMutexHolder )
|
|
|
- {
|
|
|
- TCB_t * const pxTCB = ( TCB_t * ) pxMutexHolder;
|
|
|
- BaseType_t xReturn = pdFALSE;
|
|
|
-
|
|
|
- if( pxMutexHolder != NULL )
|
|
|
- {
|
|
|
- configASSERT( pxTCB->uxMutexesHeld );
|
|
|
- ( pxTCB->uxMutexesHeld )--;
|
|
|
-
|
|
|
- if( pxTCB->uxPriority != pxTCB->uxBasePriority )
|
|
|
- {
|
|
|
- /* Only disinherit if no other mutexes are held. */
|
|
|
- if( pxTCB->uxMutexesHeld == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- /* A task can only have an inhertied priority if it holds
|
|
|
- the mutex. If the mutex is held by a task then it cannot be
|
|
|
- given from an interrupt, and if a mutex is given by the
|
|
|
- holding task then it must be the running state task. Remove
|
|
|
- the holding task from the ready list. */
|
|
|
- if( uxListRemove( &( pxTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- taskRESET_READY_PRIORITY( pxTCB->uxPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* Disinherit the priority before adding the task into the
|
|
|
- new ready list. */
|
|
|
- traceTASK_PRIORITY_DISINHERIT( pxTCB, pxTCB->uxBasePriority );
|
|
|
- pxTCB->uxPriority = pxTCB->uxBasePriority;
|
|
|
-
|
|
|
- /* Reset the event list item value. It cannot be in use for
|
|
|
- any other purpose if this task is running, and it must be
|
|
|
- running to give back the mutex. */
|
|
|
- listSET_LIST_ITEM_VALUE( &( pxTCB->xEventListItem ), ( TickType_t ) configMAX_PRIORITIES - ( TickType_t ) pxTCB->uxPriority ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
- prvAddTaskToReadyList( pxTCB );
|
|
|
-
|
|
|
- /* Return true to indicate that a context switch is required.
|
|
|
- This is only actually required in the corner case whereby
|
|
|
- multiple mutexes were held and the mutexes were given back
|
|
|
- in an order different to that in which they were taken.
|
|
|
- If a context switch did not occur when the first mutex was
|
|
|
- returned, even if a task was waiting on it, then a context
|
|
|
- switch should occur when the last mutex is returned whether
|
|
|
- a task is waiting on it or not. */
|
|
|
- xReturn = pdTRUE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- return xReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_MUTEXES */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( portCRITICAL_NESTING_IN_TCB == 1 )
|
|
|
-
|
|
|
- void vTaskEnterCritical( void )
|
|
|
- {
|
|
|
- portDISABLE_INTERRUPTS();
|
|
|
-
|
|
|
- if( xSchedulerRunning != pdFALSE )
|
|
|
- {
|
|
|
- ( pxCurrentTCB->uxCriticalNesting )++;
|
|
|
-
|
|
|
- /* This is not the interrupt safe version of the enter critical
|
|
|
- function so assert() if it is being called from an interrupt
|
|
|
- context. Only API functions that end in "FromISR" can be used in an
|
|
|
- interrupt. Only assert if the critical nesting count is 1 to
|
|
|
- protect against recursive calls if the assert function also uses a
|
|
|
- critical section. */
|
|
|
- if( pxCurrentTCB->uxCriticalNesting == 1 )
|
|
|
- {
|
|
|
- portASSERT_IF_IN_ISR();
|
|
|
- }
|
|
|
-
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* portCRITICAL_NESTING_IN_TCB */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( portCRITICAL_NESTING_IN_TCB == 1 )
|
|
|
-
|
|
|
- void vTaskExitCritical( void )
|
|
|
- {
|
|
|
- if( xSchedulerRunning != pdFALSE )
|
|
|
- {
|
|
|
- if( pxCurrentTCB->uxCriticalNesting > 0U )
|
|
|
- {
|
|
|
- ( pxCurrentTCB->uxCriticalNesting )--;
|
|
|
-
|
|
|
- if( pxCurrentTCB->uxCriticalNesting == 0U )
|
|
|
- {
|
|
|
- portENABLE_INTERRUPTS();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* portCRITICAL_NESTING_IN_TCB */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( ( configUSE_TRACE_FACILITY == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) )
|
|
|
-
|
|
|
- static char *prvWriteNameToBuffer( char *pcBuffer, const char *pcTaskName )
|
|
|
- {
|
|
|
- BaseType_t x;
|
|
|
-
|
|
|
- /* Start by copying the entire string. */
|
|
|
- strcpy( pcBuffer, pcTaskName );
|
|
|
-
|
|
|
- /* Pad the end of the string with spaces to ensure columns line up when
|
|
|
- printed out. */
|
|
|
- for( x = strlen( pcBuffer ); x < ( configMAX_TASK_NAME_LEN - 1 ); x++ )
|
|
|
- {
|
|
|
- pcBuffer[ x ] = ' ';
|
|
|
- }
|
|
|
-
|
|
|
- /* Terminate. */
|
|
|
- pcBuffer[ x ] = 0x00;
|
|
|
-
|
|
|
- /* Return the new end of string. */
|
|
|
- return &( pcBuffer[ x ] );
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* ( configUSE_TRACE_FACILITY == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( ( configUSE_TRACE_FACILITY == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) )
|
|
|
-
|
|
|
- void vTaskList( char * pcWriteBuffer )
|
|
|
- {
|
|
|
- TaskStatus_t *pxTaskStatusArray;
|
|
|
- volatile UBaseType_t uxArraySize, x;
|
|
|
- char cStatus;
|
|
|
-
|
|
|
- /*
|
|
|
- * PLEASE NOTE:
|
|
|
- *
|
|
|
- * This function is provided for convenience only, and is used by many
|
|
|
- * of the demo applications. Do not consider it to be part of the
|
|
|
- * scheduler.
|
|
|
- *
|
|
|
- * vTaskList() calls uxTaskGetSystemState(), then formats part of the
|
|
|
- * uxTaskGetSystemState() output into a human readable table that
|
|
|
- * displays task names, states and stack usage.
|
|
|
- *
|
|
|
- * vTaskList() has a dependency on the sprintf() C library function that
|
|
|
- * might bloat the code size, use a lot of stack, and provide different
|
|
|
- * results on different platforms. An alternative, tiny, third party,
|
|
|
- * and limited functionality implementation of sprintf() is provided in
|
|
|
- * many of the FreeRTOS/Demo sub-directories in a file called
|
|
|
- * printf-stdarg.c (note printf-stdarg.c does not provide a full
|
|
|
- * snprintf() implementation!).
|
|
|
- *
|
|
|
- * It is recommended that production systems call uxTaskGetSystemState()
|
|
|
- * directly to get access to raw stats data, rather than indirectly
|
|
|
- * through a call to vTaskList().
|
|
|
- */
|
|
|
-
|
|
|
-
|
|
|
- /* Make sure the write buffer does not contain a string. */
|
|
|
- *pcWriteBuffer = 0x00;
|
|
|
-
|
|
|
- /* Take a snapshot of the number of tasks in case it changes while this
|
|
|
- function is executing. */
|
|
|
- uxArraySize = uxCurrentNumberOfTasks;
|
|
|
-
|
|
|
- /* Allocate an array index for each task. */
|
|
|
- pxTaskStatusArray = pvPortMalloc( uxCurrentNumberOfTasks * sizeof( TaskStatus_t ) );
|
|
|
-
|
|
|
- if( pxTaskStatusArray != NULL )
|
|
|
- {
|
|
|
- /* Generate the (binary) data. */
|
|
|
- uxArraySize = uxTaskGetSystemState( pxTaskStatusArray, uxArraySize, NULL );
|
|
|
-
|
|
|
- /* Create a human readable table from the binary data. */
|
|
|
- for( x = 0; x < uxArraySize; x++ )
|
|
|
- {
|
|
|
- switch( pxTaskStatusArray[ x ].eCurrentState )
|
|
|
- {
|
|
|
- case eReady: cStatus = tskREADY_CHAR;
|
|
|
- break;
|
|
|
-
|
|
|
- case eBlocked: cStatus = tskBLOCKED_CHAR;
|
|
|
- break;
|
|
|
-
|
|
|
- case eSuspended: cStatus = tskSUSPENDED_CHAR;
|
|
|
- break;
|
|
|
-
|
|
|
- case eDeleted: cStatus = tskDELETED_CHAR;
|
|
|
- break;
|
|
|
-
|
|
|
- default: /* Should not get here, but it is included
|
|
|
- to prevent static checking errors. */
|
|
|
- cStatus = 0x00;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- /* Write the task name to the string, padding with spaces so it
|
|
|
- can be printed in tabular form more easily. */
|
|
|
- pcWriteBuffer = prvWriteNameToBuffer( pcWriteBuffer, pxTaskStatusArray[ x ].pcTaskName );
|
|
|
-
|
|
|
- /* Write the rest of the string. */
|
|
|
- sprintf( pcWriteBuffer, "\t%c\t%u\t%u\t%u\r\n", cStatus, ( unsigned int ) pxTaskStatusArray[ x ].uxCurrentPriority, ( unsigned int ) pxTaskStatusArray[ x ].usStackHighWaterMark, ( unsigned int ) pxTaskStatusArray[ x ].xTaskNumber );
|
|
|
- pcWriteBuffer += strlen( pcWriteBuffer );
|
|
|
- }
|
|
|
-
|
|
|
- /* Free the array again. */
|
|
|
- vPortFree( pxTaskStatusArray );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* ( ( configUSE_TRACE_FACILITY == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) ) */
|
|
|
-/*----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( ( configGENERATE_RUN_TIME_STATS == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) )
|
|
|
-
|
|
|
- void vTaskGetRunTimeStats( char *pcWriteBuffer )
|
|
|
- {
|
|
|
- TaskStatus_t *pxTaskStatusArray;
|
|
|
- volatile UBaseType_t uxArraySize, x;
|
|
|
- uint32_t ulTotalTime, ulStatsAsPercentage;
|
|
|
-
|
|
|
- #if( configUSE_TRACE_FACILITY != 1 )
|
|
|
- {
|
|
|
- #error configUSE_TRACE_FACILITY must also be set to 1 in FreeRTOSConfig.h to use vTaskGetRunTimeStats().
|
|
|
- }
|
|
|
- #endif
|
|
|
-
|
|
|
- /*
|
|
|
- * PLEASE NOTE:
|
|
|
- *
|
|
|
- * This function is provided for convenience only, and is used by many
|
|
|
- * of the demo applications. Do not consider it to be part of the
|
|
|
- * scheduler.
|
|
|
- *
|
|
|
- * vTaskGetRunTimeStats() calls uxTaskGetSystemState(), then formats part
|
|
|
- * of the uxTaskGetSystemState() output into a human readable table that
|
|
|
- * displays the amount of time each task has spent in the Running state
|
|
|
- * in both absolute and percentage terms.
|
|
|
- *
|
|
|
- * vTaskGetRunTimeStats() has a dependency on the sprintf() C library
|
|
|
- * function that might bloat the code size, use a lot of stack, and
|
|
|
- * provide different results on different platforms. An alternative,
|
|
|
- * tiny, third party, and limited functionality implementation of
|
|
|
- * sprintf() is provided in many of the FreeRTOS/Demo sub-directories in
|
|
|
- * a file called printf-stdarg.c (note printf-stdarg.c does not provide
|
|
|
- * a full snprintf() implementation!).
|
|
|
- *
|
|
|
- * It is recommended that production systems call uxTaskGetSystemState()
|
|
|
- * directly to get access to raw stats data, rather than indirectly
|
|
|
- * through a call to vTaskGetRunTimeStats().
|
|
|
- */
|
|
|
-
|
|
|
- /* Make sure the write buffer does not contain a string. */
|
|
|
- *pcWriteBuffer = 0x00;
|
|
|
-
|
|
|
- /* Take a snapshot of the number of tasks in case it changes while this
|
|
|
- function is executing. */
|
|
|
- uxArraySize = uxCurrentNumberOfTasks;
|
|
|
-
|
|
|
- /* Allocate an array index for each task. */
|
|
|
- pxTaskStatusArray = pvPortMalloc( uxCurrentNumberOfTasks * sizeof( TaskStatus_t ) );
|
|
|
-
|
|
|
- if( pxTaskStatusArray != NULL )
|
|
|
- {
|
|
|
- /* Generate the (binary) data. */
|
|
|
- uxArraySize = uxTaskGetSystemState( pxTaskStatusArray, uxArraySize, &ulTotalTime );
|
|
|
-
|
|
|
- /* For percentage calculations. */
|
|
|
- ulTotalTime /= 100UL;
|
|
|
-
|
|
|
- /* Avoid divide by zero errors. */
|
|
|
- if( ulTotalTime > 0 )
|
|
|
- {
|
|
|
- /* Create a human readable table from the binary data. */
|
|
|
- for( x = 0; x < uxArraySize; x++ )
|
|
|
- {
|
|
|
- /* What percentage of the total run time has the task used?
|
|
|
- This will always be rounded down to the nearest integer.
|
|
|
- ulTotalRunTimeDiv100 has already been divided by 100. */
|
|
|
- ulStatsAsPercentage = pxTaskStatusArray[ x ].ulRunTimeCounter / ulTotalTime;
|
|
|
-
|
|
|
- /* Write the task name to the string, padding with
|
|
|
- spaces so it can be printed in tabular form more
|
|
|
- easily. */
|
|
|
- pcWriteBuffer = prvWriteNameToBuffer( pcWriteBuffer, pxTaskStatusArray[ x ].pcTaskName );
|
|
|
-
|
|
|
- if( ulStatsAsPercentage > 0UL )
|
|
|
- {
|
|
|
- #ifdef portLU_PRINTF_SPECIFIER_REQUIRED
|
|
|
- {
|
|
|
- sprintf( pcWriteBuffer, "\t%lu\t\t%lu%%\r\n", pxTaskStatusArray[ x ].ulRunTimeCounter, ulStatsAsPercentage );
|
|
|
- }
|
|
|
- #else
|
|
|
- {
|
|
|
- /* sizeof( int ) == sizeof( long ) so a smaller
|
|
|
- printf() library can be used. */
|
|
|
- sprintf( pcWriteBuffer, "\t%u\t\t%u%%\r\n", ( unsigned int ) pxTaskStatusArray[ x ].ulRunTimeCounter, ( unsigned int ) ulStatsAsPercentage );
|
|
|
- }
|
|
|
- #endif
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* If the percentage is zero here then the task has
|
|
|
- consumed less than 1% of the total run time. */
|
|
|
- #ifdef portLU_PRINTF_SPECIFIER_REQUIRED
|
|
|
- {
|
|
|
- sprintf( pcWriteBuffer, "\t%lu\t\t<1%%\r\n", pxTaskStatusArray[ x ].ulRunTimeCounter );
|
|
|
- }
|
|
|
- #else
|
|
|
- {
|
|
|
- /* sizeof( int ) == sizeof( long ) so a smaller
|
|
|
- printf() library can be used. */
|
|
|
- sprintf( pcWriteBuffer, "\t%u\t\t<1%%\r\n", ( unsigned int ) pxTaskStatusArray[ x ].ulRunTimeCounter );
|
|
|
- }
|
|
|
- #endif
|
|
|
- }
|
|
|
-
|
|
|
- pcWriteBuffer += strlen( pcWriteBuffer );
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- /* Free the array again. */
|
|
|
- vPortFree( pxTaskStatusArray );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* ( ( configGENERATE_RUN_TIME_STATS == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) ) */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-TickType_t uxTaskResetEventItemValue( void )
|
|
|
-{
|
|
|
-TickType_t uxReturn;
|
|
|
-
|
|
|
- uxReturn = listGET_LIST_ITEM_VALUE( &( pxCurrentTCB->xEventListItem ) );
|
|
|
-
|
|
|
- /* Reset the event list item to its normal value - so it can be used with
|
|
|
- queues and semaphores. */
|
|
|
- listSET_LIST_ITEM_VALUE( &( pxCurrentTCB->xEventListItem ), ( ( TickType_t ) configMAX_PRIORITIES - ( TickType_t ) pxCurrentTCB->uxPriority ) ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
-
|
|
|
- return uxReturn;
|
|
|
-}
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if ( configUSE_MUTEXES == 1 )
|
|
|
-
|
|
|
- void *pvTaskIncrementMutexHeldCount( void )
|
|
|
- {
|
|
|
- /* If xSemaphoreCreateMutex() is called before any tasks have been created
|
|
|
- then pxCurrentTCB will be NULL. */
|
|
|
- if( pxCurrentTCB != NULL )
|
|
|
- {
|
|
|
- ( pxCurrentTCB->uxMutexesHeld )++;
|
|
|
- }
|
|
|
-
|
|
|
- return pxCurrentTCB;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_MUTEXES */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
-
|
|
|
- uint32_t ulTaskNotifyTake( BaseType_t xClearCountOnExit, TickType_t xTicksToWait )
|
|
|
- {
|
|
|
- TickType_t xTimeToWake;
|
|
|
- uint32_t ulReturn;
|
|
|
-
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- /* Only block if the notification count is not already non-zero. */
|
|
|
- if( pxCurrentTCB->ulNotifiedValue == 0UL )
|
|
|
- {
|
|
|
- /* Mark this task as waiting for a notification. */
|
|
|
- pxCurrentTCB->eNotifyState = eWaitingNotification;
|
|
|
-
|
|
|
- if( xTicksToWait > ( TickType_t ) 0 )
|
|
|
- {
|
|
|
- /* The task is going to block. First it must be removed
|
|
|
- from the ready list. */
|
|
|
- if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- /* The current task must be in a ready list, so there is
|
|
|
- no need to check, and the port reset macro can be called
|
|
|
- directly. */
|
|
|
- portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
- {
|
|
|
- if( xTicksToWait == portMAX_DELAY )
|
|
|
- {
|
|
|
- /* Add the task to the suspended task list instead
|
|
|
- of a delayed task list to ensure the task is not
|
|
|
- woken by a timing event. It will block
|
|
|
- indefinitely. */
|
|
|
- vListInsertEnd( &xSuspendedTaskList, &( pxCurrentTCB->xGenericListItem ) );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* Calculate the time at which the task should be
|
|
|
- woken if no notification events occur. This may
|
|
|
- overflow but this doesn't matter, the scheduler will
|
|
|
- handle it. */
|
|
|
- xTimeToWake = xTickCount + xTicksToWait;
|
|
|
- prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
- }
|
|
|
- }
|
|
|
- #else /* INCLUDE_vTaskSuspend */
|
|
|
- {
|
|
|
- /* Calculate the time at which the task should be
|
|
|
- woken if the event does not occur. This may
|
|
|
- overflow but this doesn't matter, the scheduler will
|
|
|
- handle it. */
|
|
|
- xTimeToWake = xTickCount + xTicksToWait;
|
|
|
- prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
- }
|
|
|
- #endif /* INCLUDE_vTaskSuspend */
|
|
|
-
|
|
|
- /* All ports are written to allow a yield in a critical
|
|
|
- section (some will yield immediately, others wait until the
|
|
|
- critical section exits) - but it is not something that
|
|
|
- application code should ever do. */
|
|
|
- portYIELD_WITHIN_API();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- ulReturn = pxCurrentTCB->ulNotifiedValue;
|
|
|
-
|
|
|
- if( ulReturn != 0UL )
|
|
|
- {
|
|
|
- if( xClearCountOnExit != pdFALSE )
|
|
|
- {
|
|
|
- pxCurrentTCB->ulNotifiedValue = 0UL;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- ( pxCurrentTCB->ulNotifiedValue )--;
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- pxCurrentTCB->eNotifyState = eNotWaitingNotification;
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- return ulReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_TASK_NOTIFICATIONS */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
-
|
|
|
- BaseType_t xTaskNotifyWait( uint32_t ulBitsToClearOnEntry, uint32_t ulBitsToClearOnExit, uint32_t *pulNotificationValue, TickType_t xTicksToWait )
|
|
|
- {
|
|
|
- TickType_t xTimeToWake;
|
|
|
- BaseType_t xReturn;
|
|
|
-
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- /* Only block if a notification is not already pending. */
|
|
|
- if( pxCurrentTCB->eNotifyState != eNotified )
|
|
|
- {
|
|
|
- /* Clear bits in the task's notification value as bits may get
|
|
|
- set by the notifying task or interrupt. This can be used to
|
|
|
- clear the value to zero. */
|
|
|
- pxCurrentTCB->ulNotifiedValue &= ~ulBitsToClearOnEntry;
|
|
|
-
|
|
|
- /* Mark this task as waiting for a notification. */
|
|
|
- pxCurrentTCB->eNotifyState = eWaitingNotification;
|
|
|
-
|
|
|
- if( xTicksToWait > ( TickType_t ) 0 )
|
|
|
- {
|
|
|
- /* The task is going to block. First it must be removed
|
|
|
- from the ready list. */
|
|
|
- if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
- {
|
|
|
- /* The current task must be in a ready list, so there is
|
|
|
- no need to check, and the port reset macro can be called
|
|
|
- directly. */
|
|
|
- portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
-
|
|
|
- #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
- {
|
|
|
- if( xTicksToWait == portMAX_DELAY )
|
|
|
- {
|
|
|
- /* Add the task to the suspended task list instead
|
|
|
- of a delayed task list to ensure the task is not
|
|
|
- woken by a timing event. It will block
|
|
|
- indefinitely. */
|
|
|
- vListInsertEnd( &xSuspendedTaskList, &( pxCurrentTCB->xGenericListItem ) );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* Calculate the time at which the task should be
|
|
|
- woken if no notification events occur. This may
|
|
|
- overflow but this doesn't matter, the scheduler will
|
|
|
- handle it. */
|
|
|
- xTimeToWake = xTickCount + xTicksToWait;
|
|
|
- prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
- }
|
|
|
- }
|
|
|
- #else /* INCLUDE_vTaskSuspend */
|
|
|
- {
|
|
|
- /* Calculate the time at which the task should be
|
|
|
- woken if the event does not occur. This may
|
|
|
- overflow but this doesn't matter, the scheduler will
|
|
|
- handle it. */
|
|
|
- xTimeToWake = xTickCount + xTicksToWait;
|
|
|
- prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
- }
|
|
|
- #endif /* INCLUDE_vTaskSuspend */
|
|
|
-
|
|
|
- /* All ports are written to allow a yield in a critical
|
|
|
- section (some will yield immediately, others wait until the
|
|
|
- critical section exits) - but it is not something that
|
|
|
- application code should ever do. */
|
|
|
- portYIELD_WITHIN_API();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- if( pulNotificationValue != NULL )
|
|
|
- {
|
|
|
- /* Output the current notification value, which may or may not
|
|
|
- have changed. */
|
|
|
- *pulNotificationValue = pxCurrentTCB->ulNotifiedValue;
|
|
|
- }
|
|
|
-
|
|
|
- /* If eNotifyValue is set then either the task never entered the
|
|
|
- blocked state (because a notification was already pending) or the
|
|
|
- task unblocked because of a notification. Otherwise the task
|
|
|
- unblocked because of a timeout. */
|
|
|
- if( pxCurrentTCB->eNotifyState == eWaitingNotification )
|
|
|
- {
|
|
|
- /* A notification was not received. */
|
|
|
- xReturn = pdFALSE;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* A notification was already pending or a notification was
|
|
|
- received while the task was waiting. */
|
|
|
- pxCurrentTCB->ulNotifiedValue &= ~ulBitsToClearOnExit;
|
|
|
- xReturn = pdTRUE;
|
|
|
- }
|
|
|
-
|
|
|
- pxCurrentTCB->eNotifyState = eNotWaitingNotification;
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- return xReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_TASK_NOTIFICATIONS */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
-
|
|
|
- BaseType_t xTaskNotify( TaskHandle_t xTaskToNotify, uint32_t ulValue, eNotifyAction eAction )
|
|
|
- {
|
|
|
- TCB_t * pxTCB;
|
|
|
- eNotifyValue eOriginalNotifyState;
|
|
|
- BaseType_t xReturn = pdPASS;
|
|
|
-
|
|
|
- configASSERT( xTaskToNotify );
|
|
|
- pxTCB = ( TCB_t * ) xTaskToNotify;
|
|
|
-
|
|
|
- taskENTER_CRITICAL();
|
|
|
- {
|
|
|
- eOriginalNotifyState = pxTCB->eNotifyState;
|
|
|
-
|
|
|
- pxTCB->eNotifyState = eNotified;
|
|
|
-
|
|
|
- switch( eAction )
|
|
|
- {
|
|
|
- case eSetBits :
|
|
|
- pxTCB->ulNotifiedValue |= ulValue;
|
|
|
- break;
|
|
|
-
|
|
|
- case eIncrement :
|
|
|
- ( pxTCB->ulNotifiedValue )++;
|
|
|
- break;
|
|
|
-
|
|
|
- case eSetValueWithOverwrite :
|
|
|
- pxTCB->ulNotifiedValue = ulValue;
|
|
|
- break;
|
|
|
-
|
|
|
- case eSetValueWithoutOverwrite :
|
|
|
- if( eOriginalNotifyState != eNotified )
|
|
|
- {
|
|
|
- pxTCB->ulNotifiedValue = ulValue;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The value could not be written to the task. */
|
|
|
- xReturn = pdFAIL;
|
|
|
- }
|
|
|
- break;
|
|
|
-
|
|
|
- case eNoAction:
|
|
|
- /* The task is being notified without its notify value being
|
|
|
- updated. */
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
-
|
|
|
- /* If the task is in the blocked state specifically to wait for a
|
|
|
- notification then unblock it now. */
|
|
|
- if( eOriginalNotifyState == eWaitingNotification )
|
|
|
- {
|
|
|
- ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
- prvAddTaskToReadyList( pxTCB );
|
|
|
-
|
|
|
- /* The task should not have been on an event list. */
|
|
|
- configASSERT( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) == NULL );
|
|
|
-
|
|
|
- if( pxTCB->uxPriority > pxCurrentTCB->uxPriority )
|
|
|
- {
|
|
|
- /* The notified task has a priority above the currently
|
|
|
- executing task so a yield is required. */
|
|
|
- portYIELD_WITHIN_API();
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- taskEXIT_CRITICAL();
|
|
|
-
|
|
|
- return xReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_TASK_NOTIFICATIONS */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
-
|
|
|
- BaseType_t xTaskNotifyFromISR( TaskHandle_t xTaskToNotify, uint32_t ulValue, eNotifyAction eAction, BaseType_t *pxHigherPriorityTaskWoken )
|
|
|
- {
|
|
|
- TCB_t * pxTCB;
|
|
|
- eNotifyValue eOriginalNotifyState;
|
|
|
- BaseType_t xReturn = pdPASS;
|
|
|
- UBaseType_t uxSavedInterruptStatus;
|
|
|
-
|
|
|
- configASSERT( xTaskToNotify );
|
|
|
-
|
|
|
- /* RTOS ports that support interrupt nesting have the concept of a
|
|
|
- maximum system call (or maximum API call) interrupt priority.
|
|
|
- Interrupts that are above the maximum system call priority are keep
|
|
|
- permanently enabled, even when the RTOS kernel is in a critical section,
|
|
|
- but cannot make any calls to FreeRTOS API functions. If configASSERT()
|
|
|
- is defined in FreeRTOSConfig.h then
|
|
|
- portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion
|
|
|
- failure if a FreeRTOS API function is called from an interrupt that has
|
|
|
- been assigned a priority above the configured maximum system call
|
|
|
- priority. Only FreeRTOS functions that end in FromISR can be called
|
|
|
- from interrupts that have been assigned a priority at or (logically)
|
|
|
- below the maximum system call interrupt priority. FreeRTOS maintains a
|
|
|
- separate interrupt safe API to ensure interrupt entry is as fast and as
|
|
|
- simple as possible. More information (albeit Cortex-M specific) is
|
|
|
- provided on the following link:
|
|
|
- http://www.freertos.org/RTOS-Cortex-M3-M4.html */
|
|
|
- portASSERT_IF_INTERRUPT_PRIORITY_INVALID();
|
|
|
-
|
|
|
- pxTCB = ( TCB_t * ) xTaskToNotify;
|
|
|
-
|
|
|
- uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
|
|
|
- {
|
|
|
- eOriginalNotifyState = pxTCB->eNotifyState;
|
|
|
-
|
|
|
- pxTCB->eNotifyState = eNotified;
|
|
|
-
|
|
|
- switch( eAction )
|
|
|
- {
|
|
|
- case eSetBits :
|
|
|
- pxTCB->ulNotifiedValue |= ulValue;
|
|
|
- break;
|
|
|
-
|
|
|
- case eIncrement :
|
|
|
- ( pxTCB->ulNotifiedValue )++;
|
|
|
- break;
|
|
|
-
|
|
|
- case eSetValueWithOverwrite :
|
|
|
- pxTCB->ulNotifiedValue = ulValue;
|
|
|
- break;
|
|
|
-
|
|
|
- case eSetValueWithoutOverwrite :
|
|
|
- if( eOriginalNotifyState != eNotified )
|
|
|
- {
|
|
|
- pxTCB->ulNotifiedValue = ulValue;
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The value could not be written to the task. */
|
|
|
- xReturn = pdFAIL;
|
|
|
- }
|
|
|
- break;
|
|
|
-
|
|
|
- case eNoAction :
|
|
|
- /* The task is being notified without its notify value being
|
|
|
- updated. */
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
-
|
|
|
- /* If the task is in the blocked state specifically to wait for a
|
|
|
- notification then unblock it now. */
|
|
|
- if( eOriginalNotifyState == eWaitingNotification )
|
|
|
- {
|
|
|
- /* The task should not have been on an event list. */
|
|
|
- configASSERT( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) == NULL );
|
|
|
-
|
|
|
- if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
- {
|
|
|
- ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
- prvAddTaskToReadyList( pxTCB );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The delayed and ready lists cannot be accessed, so hold
|
|
|
- this task pending until the scheduler is resumed. */
|
|
|
- vListInsertEnd( &( xPendingReadyList ), &( pxTCB->xEventListItem ) );
|
|
|
- }
|
|
|
-
|
|
|
- if( pxTCB->uxPriority > pxCurrentTCB->uxPriority )
|
|
|
- {
|
|
|
- /* The notified task has a priority above the currently
|
|
|
- executing task so a yield is required. */
|
|
|
- if( pxHigherPriorityTaskWoken != NULL )
|
|
|
- {
|
|
|
- *pxHigherPriorityTaskWoken = pdTRUE;
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
|
|
|
-
|
|
|
- return xReturn;
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_TASK_NOTIFICATIONS */
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-#if( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
-
|
|
|
- void vTaskNotifyGiveFromISR( TaskHandle_t xTaskToNotify, BaseType_t *pxHigherPriorityTaskWoken )
|
|
|
- {
|
|
|
- TCB_t * pxTCB;
|
|
|
- eNotifyValue eOriginalNotifyState;
|
|
|
- UBaseType_t uxSavedInterruptStatus;
|
|
|
-
|
|
|
- configASSERT( xTaskToNotify );
|
|
|
-
|
|
|
- /* RTOS ports that support interrupt nesting have the concept of a
|
|
|
- maximum system call (or maximum API call) interrupt priority.
|
|
|
- Interrupts that are above the maximum system call priority are keep
|
|
|
- permanently enabled, even when the RTOS kernel is in a critical section,
|
|
|
- but cannot make any calls to FreeRTOS API functions. If configASSERT()
|
|
|
- is defined in FreeRTOSConfig.h then
|
|
|
- portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion
|
|
|
- failure if a FreeRTOS API function is called from an interrupt that has
|
|
|
- been assigned a priority above the configured maximum system call
|
|
|
- priority. Only FreeRTOS functions that end in FromISR can be called
|
|
|
- from interrupts that have been assigned a priority at or (logically)
|
|
|
- below the maximum system call interrupt priority. FreeRTOS maintains a
|
|
|
- separate interrupt safe API to ensure interrupt entry is as fast and as
|
|
|
- simple as possible. More information (albeit Cortex-M specific) is
|
|
|
- provided on the following link:
|
|
|
- http://www.freertos.org/RTOS-Cortex-M3-M4.html */
|
|
|
- portASSERT_IF_INTERRUPT_PRIORITY_INVALID();
|
|
|
-
|
|
|
- pxTCB = ( TCB_t * ) xTaskToNotify;
|
|
|
-
|
|
|
- uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
|
|
|
- {
|
|
|
- eOriginalNotifyState = pxTCB->eNotifyState;
|
|
|
- pxTCB->eNotifyState = eNotified;
|
|
|
-
|
|
|
- /* 'Giving' is equivalent to incrementing a count in a counting
|
|
|
- semaphore. */
|
|
|
- ( pxTCB->ulNotifiedValue )++;
|
|
|
-
|
|
|
- /* If the task is in the blocked state specifically to wait for a
|
|
|
- notification then unblock it now. */
|
|
|
- if( eOriginalNotifyState == eWaitingNotification )
|
|
|
- {
|
|
|
- /* The task should not have been on an event list. */
|
|
|
- configASSERT( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) == NULL );
|
|
|
-
|
|
|
- if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
- {
|
|
|
- ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
- prvAddTaskToReadyList( pxTCB );
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- /* The delayed and ready lists cannot be accessed, so hold
|
|
|
- this task pending until the scheduler is resumed. */
|
|
|
- vListInsertEnd( &( xPendingReadyList ), &( pxTCB->xEventListItem ) );
|
|
|
- }
|
|
|
-
|
|
|
- if( pxTCB->uxPriority > pxCurrentTCB->uxPriority )
|
|
|
- {
|
|
|
- /* The notified task has a priority above the currently
|
|
|
- executing task so a yield is required. */
|
|
|
- if( pxHigherPriorityTaskWoken != NULL )
|
|
|
- {
|
|
|
- *pxHigherPriorityTaskWoken = pdTRUE;
|
|
|
- }
|
|
|
- }
|
|
|
- else
|
|
|
- {
|
|
|
- mtCOVERAGE_TEST_MARKER();
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
|
|
|
- }
|
|
|
-
|
|
|
-#endif /* configUSE_TASK_NOTIFICATIONS */
|
|
|
-
|
|
|
-/*-----------------------------------------------------------*/
|
|
|
-
|
|
|
-
|
|
|
-#ifdef FREERTOS_MODULE_TEST
|
|
|
- #include "tasks_test_access_functions.h"
|
|
|
-#endif
|
|
|
-
|
|
|
+/*
|
|
|
+ FreeRTOS V8.2.0 - Copyright (C) 2015 Real Time Engineers Ltd.
|
|
|
+ All rights reserved
|
|
|
+
|
|
|
+ VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
|
|
|
+
|
|
|
+ This file is part of the FreeRTOS distribution.
|
|
|
+
|
|
|
+ FreeRTOS is free software; you can redistribute it and/or modify it under
|
|
|
+ the terms of the GNU General Public License (version 2) as published by the
|
|
|
+ Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
|
|
|
+
|
|
|
+ ***************************************************************************
|
|
|
+ >>! NOTE: The modification to the GPL is included to allow you to !<<
|
|
|
+ >>! distribute a combined work that includes FreeRTOS without being !<<
|
|
|
+ >>! obliged to provide the source code for proprietary components !<<
|
|
|
+ >>! outside of the FreeRTOS kernel. !<<
|
|
|
+ ***************************************************************************
|
|
|
+
|
|
|
+ FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
|
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
|
+ FOR A PARTICULAR PURPOSE. Full license text is available on the following
|
|
|
+ link: http://www.freertos.org/a00114.html
|
|
|
+
|
|
|
+ ***************************************************************************
|
|
|
+ * *
|
|
|
+ * FreeRTOS provides completely free yet professionally developed, *
|
|
|
+ * robust, strictly quality controlled, supported, and cross *
|
|
|
+ * platform software that is more than just the market leader, it *
|
|
|
+ * is the industry's de facto standard. *
|
|
|
+ * *
|
|
|
+ * Help yourself get started quickly while simultaneously helping *
|
|
|
+ * to support the FreeRTOS project by purchasing a FreeRTOS *
|
|
|
+ * tutorial book, reference manual, or both: *
|
|
|
+ * http://www.FreeRTOS.org/Documentation *
|
|
|
+ * *
|
|
|
+ ***************************************************************************
|
|
|
+
|
|
|
+ http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
|
|
|
+ the FAQ page "My application does not run, what could be wrong?". Have you
|
|
|
+ defined configASSERT()?
|
|
|
+
|
|
|
+ http://www.FreeRTOS.org/support - In return for receiving this top quality
|
|
|
+ embedded software for free we request you assist our global community by
|
|
|
+ participating in the support forum.
|
|
|
+
|
|
|
+ http://www.FreeRTOS.org/training - Investing in training allows your team to
|
|
|
+ be as productive as possible as early as possible. Now you can receive
|
|
|
+ FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
|
|
|
+ Ltd, and the world's leading authority on the world's leading RTOS.
|
|
|
+
|
|
|
+ http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
|
|
|
+ including FreeRTOS+Trace - an indispensable productivity tool, a DOS
|
|
|
+ compatible FAT file system, and our tiny thread aware UDP/IP stack.
|
|
|
+
|
|
|
+ http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
|
|
|
+ Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
|
|
|
+
|
|
|
+ http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
|
|
|
+ Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
|
|
|
+ licenses offer ticketed support, indemnification and commercial middleware.
|
|
|
+
|
|
|
+ http://www.SafeRTOS.com - High Integrity Systems also provide a safety
|
|
|
+ engineered and independently SIL3 certified version for use in safety and
|
|
|
+ mission critical applications that require provable dependability.
|
|
|
+
|
|
|
+ 1 tab == 4 spaces!
|
|
|
+*/
|
|
|
+
|
|
|
+/* Standard includes. */
|
|
|
+#include <stdlib.h>
|
|
|
+#include <string.h>
|
|
|
+
|
|
|
+/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
|
|
|
+all the API functions to use the MPU wrappers. That should only be done when
|
|
|
+task.h is included from an application file. */
|
|
|
+#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
|
|
|
+
|
|
|
+/* FreeRTOS includes. */
|
|
|
+#include "FreeRTOS.h"
|
|
|
+#include "task.h"
|
|
|
+#include "fr_timers.h"
|
|
|
+#include "StackMacros.h"
|
|
|
+
|
|
|
+/* Lint e961 and e750 are suppressed as a MISRA exception justified because the
|
|
|
+MPU ports require MPU_WRAPPERS_INCLUDED_FROM_API_FILE to be defined for the
|
|
|
+header files above, but not in this file, in order to generate the correct
|
|
|
+privileged Vs unprivileged linkage and placement. */
|
|
|
+#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE /*lint !e961 !e750. */
|
|
|
+
|
|
|
+/* Set configUSE_STATS_FORMATTING_FUNCTIONS to 2 to include the stats formatting
|
|
|
+functions but without including stdio.h here. */
|
|
|
+#if ( configUSE_STATS_FORMATTING_FUNCTIONS == 1 )
|
|
|
+ /* At the bottom of this file are two optional functions that can be used
|
|
|
+ to generate human readable text from the raw data generated by the
|
|
|
+ uxTaskGetSystemState() function. Note the formatting functions are provided
|
|
|
+ for convenience only, and are NOT considered part of the kernel. */
|
|
|
+ #include <stdio.h>
|
|
|
+#endif /* configUSE_STATS_FORMATTING_FUNCTIONS == 1 ) */
|
|
|
+
|
|
|
+/* Sanity check the configuration. */
|
|
|
+#if configUSE_TICKLESS_IDLE != 0
|
|
|
+ #if INCLUDE_vTaskSuspend != 1
|
|
|
+ #error INCLUDE_vTaskSuspend must be set to 1 if configUSE_TICKLESS_IDLE is not set to 0
|
|
|
+ #endif /* INCLUDE_vTaskSuspend */
|
|
|
+#endif /* configUSE_TICKLESS_IDLE */
|
|
|
+
|
|
|
+/*
|
|
|
+ * Defines the size, in words, of the stack allocated to the idle task.
|
|
|
+ */
|
|
|
+#define tskIDLE_STACK_SIZE configMINIMAL_STACK_SIZE
|
|
|
+
|
|
|
+#if( configUSE_PREEMPTION == 0 )
|
|
|
+ /* If the cooperative scheduler is being used then a yield should not be
|
|
|
+ performed just because a higher priority task has been woken. */
|
|
|
+ #define taskYIELD_IF_USING_PREEMPTION()
|
|
|
+#else
|
|
|
+ #define taskYIELD_IF_USING_PREEMPTION() portYIELD_WITHIN_API()
|
|
|
+#endif
|
|
|
+
|
|
|
+/* Value that can be assigned to the eNotifyState member of the TCB. */
|
|
|
+typedef enum
|
|
|
+{
|
|
|
+ eNotWaitingNotification = 0,
|
|
|
+ eWaitingNotification,
|
|
|
+ eNotified
|
|
|
+} eNotifyValue;
|
|
|
+
|
|
|
+/*
|
|
|
+ * Task control block. A task control block (TCB) is allocated for each task,
|
|
|
+ * and stores task state information, including a pointer to the task's context
|
|
|
+ * (the task's run time environment, including register values)
|
|
|
+ */
|
|
|
+typedef struct tskTaskControlBlock
|
|
|
+{
|
|
|
+ volatile StackType_t *pxTopOfStack; /*< Points to the location of the last item placed on the tasks stack. THIS MUST BE THE FIRST MEMBER OF THE TCB STRUCT. */
|
|
|
+
|
|
|
+ #if ( portUSING_MPU_WRAPPERS == 1 )
|
|
|
+ xMPU_SETTINGS xMPUSettings; /*< The MPU settings are defined as part of the port layer. THIS MUST BE THE SECOND MEMBER OF THE TCB STRUCT. */
|
|
|
+ BaseType_t xUsingStaticallyAllocatedStack; /* Set to pdTRUE if the stack is a statically allocated array, and pdFALSE if the stack is dynamically allocated. */
|
|
|
+ #endif
|
|
|
+
|
|
|
+ ListItem_t xGenericListItem; /*< The list that the state list item of a task is reference from denotes the state of that task (Ready, Blocked, Suspended ). */
|
|
|
+ ListItem_t xEventListItem; /*< Used to reference a task from an event list. */
|
|
|
+ UBaseType_t uxPriority; /*< The priority of the task. 0 is the lowest priority. */
|
|
|
+ StackType_t *pxStack; /*< Points to the start of the stack. */
|
|
|
+ char pcTaskName[ configMAX_TASK_NAME_LEN ];/*< Descriptive name given to the task when created. Facilitates debugging only. */ /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
|
|
|
+
|
|
|
+ #if ( portSTACK_GROWTH > 0 )
|
|
|
+ StackType_t *pxEndOfStack; /*< Points to the end of the stack on architectures where the stack grows up from low memory. */
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( portCRITICAL_NESTING_IN_TCB == 1 )
|
|
|
+ UBaseType_t uxCriticalNesting; /*< Holds the critical section nesting depth for ports that do not maintain their own count in the port layer. */
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
+ UBaseType_t uxTCBNumber; /*< Stores a number that increments each time a TCB is created. It allows debuggers to determine when a task has been deleted and then recreated. */
|
|
|
+ UBaseType_t uxTaskNumber; /*< Stores a number specifically for use by third party trace code. */
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( configUSE_MUTEXES == 1 )
|
|
|
+ UBaseType_t uxBasePriority; /*< The priority last assigned to the task - used by the priority inheritance mechanism. */
|
|
|
+ UBaseType_t uxMutexesHeld;
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( configUSE_APPLICATION_TASK_TAG == 1 )
|
|
|
+ TaskHookFunction_t pxTaskTag;
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( configGENERATE_RUN_TIME_STATS == 1 )
|
|
|
+ uint32_t ulRunTimeCounter; /*< Stores the amount of time the task has spent in the Running state. */
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( configUSE_NEWLIB_REENTRANT == 1 )
|
|
|
+ /* Allocate a Newlib reent structure that is specific to this task.
|
|
|
+ Note Newlib support has been included by popular demand, but is not
|
|
|
+ used by the FreeRTOS maintainers themselves. FreeRTOS is not
|
|
|
+ responsible for resulting newlib operation. User must be familiar with
|
|
|
+ newlib and must provide system-wide implementations of the necessary
|
|
|
+ stubs. Be warned that (at the time of writing) the current newlib design
|
|
|
+ implements a system-wide malloc() that must be provided with locks. */
|
|
|
+ struct _reent xNewLib_reent;
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
+ volatile uint32_t ulNotifiedValue;
|
|
|
+ volatile eNotifyValue eNotifyState;
|
|
|
+ #endif
|
|
|
+
|
|
|
+} tskTCB;
|
|
|
+
|
|
|
+/* The old tskTCB name is maintained above then typedefed to the new TCB_t name
|
|
|
+below to enable the use of older kernel aware debuggers. */
|
|
|
+typedef tskTCB TCB_t;
|
|
|
+
|
|
|
+/*
|
|
|
+ * Some kernel aware debuggers require the data the debugger needs access to to
|
|
|
+ * be global, rather than file scope.
|
|
|
+ */
|
|
|
+#ifdef portREMOVE_STATIC_QUALIFIER
|
|
|
+ #define static
|
|
|
+#endif
|
|
|
+
|
|
|
+/*lint -e956 A manual analysis and inspection has been used to determine which
|
|
|
+static variables must be declared volatile. */
|
|
|
+
|
|
|
+PRIVILEGED_DATA TCB_t * volatile pxCurrentTCB = NULL;
|
|
|
+
|
|
|
+/* Lists for ready and blocked tasks. --------------------*/
|
|
|
+PRIVILEGED_DATA static List_t pxReadyTasksLists[ configMAX_PRIORITIES ];/*< Prioritised ready tasks. */
|
|
|
+PRIVILEGED_DATA static List_t xDelayedTaskList1; /*< Delayed tasks. */
|
|
|
+PRIVILEGED_DATA static List_t xDelayedTaskList2; /*< Delayed tasks (two lists are used - one for delays that have overflowed the current tick count. */
|
|
|
+PRIVILEGED_DATA static List_t * volatile pxDelayedTaskList; /*< Points to the delayed task list currently being used. */
|
|
|
+PRIVILEGED_DATA static List_t * volatile pxOverflowDelayedTaskList; /*< Points to the delayed task list currently being used to hold tasks that have overflowed the current tick count. */
|
|
|
+PRIVILEGED_DATA static List_t xPendingReadyList; /*< Tasks that have been readied while the scheduler was suspended. They will be moved to the ready list when the scheduler is resumed. */
|
|
|
+
|
|
|
+#if ( INCLUDE_vTaskDelete == 1 )
|
|
|
+
|
|
|
+ PRIVILEGED_DATA static List_t xTasksWaitingTermination; /*< Tasks that have been deleted - but their memory not yet freed. */
|
|
|
+ PRIVILEGED_DATA static volatile UBaseType_t uxTasksDeleted = ( UBaseType_t ) 0U;
|
|
|
+
|
|
|
+#endif
|
|
|
+
|
|
|
+#if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+
|
|
|
+ PRIVILEGED_DATA static List_t xSuspendedTaskList; /*< Tasks that are currently suspended. */
|
|
|
+
|
|
|
+#endif
|
|
|
+
|
|
|
+#if ( INCLUDE_xTaskGetIdleTaskHandle == 1 )
|
|
|
+
|
|
|
+ PRIVILEGED_DATA static TaskHandle_t xIdleTaskHandle = NULL; /*< Holds the handle of the idle task. The idle task is created automatically when the scheduler is started. */
|
|
|
+
|
|
|
+#endif
|
|
|
+
|
|
|
+/* Other file private variables. --------------------------------*/
|
|
|
+PRIVILEGED_DATA static volatile UBaseType_t uxCurrentNumberOfTasks = ( UBaseType_t ) 0U;
|
|
|
+PRIVILEGED_DATA static volatile TickType_t xTickCount = ( TickType_t ) 0U;
|
|
|
+PRIVILEGED_DATA static volatile UBaseType_t uxTopReadyPriority = tskIDLE_PRIORITY;
|
|
|
+PRIVILEGED_DATA static volatile BaseType_t xSchedulerRunning = pdFALSE;
|
|
|
+PRIVILEGED_DATA static volatile UBaseType_t uxPendedTicks = ( UBaseType_t ) 0U;
|
|
|
+PRIVILEGED_DATA static volatile BaseType_t xYieldPending = pdFALSE;
|
|
|
+PRIVILEGED_DATA static volatile BaseType_t xNumOfOverflows = ( BaseType_t ) 0;
|
|
|
+PRIVILEGED_DATA static UBaseType_t uxTaskNumber = ( UBaseType_t ) 0U;
|
|
|
+PRIVILEGED_DATA static volatile TickType_t xNextTaskUnblockTime = portMAX_DELAY;
|
|
|
+
|
|
|
+/* Context switches are held pending while the scheduler is suspended. Also,
|
|
|
+interrupts must not manipulate the xGenericListItem of a TCB, or any of the
|
|
|
+lists the xGenericListItem can be referenced from, if the scheduler is suspended.
|
|
|
+If an interrupt needs to unblock a task while the scheduler is suspended then it
|
|
|
+moves the task's event list item into the xPendingReadyList, ready for the
|
|
|
+kernel to move the task from the pending ready list into the real ready list
|
|
|
+when the scheduler is unsuspended. The pending ready list itself can only be
|
|
|
+accessed from a critical section. */
|
|
|
+PRIVILEGED_DATA static volatile UBaseType_t uxSchedulerSuspended = ( UBaseType_t ) pdFALSE;
|
|
|
+
|
|
|
+#if ( configGENERATE_RUN_TIME_STATS == 1 )
|
|
|
+
|
|
|
+ PRIVILEGED_DATA static uint32_t ulTaskSwitchedInTime = 0UL; /*< Holds the value of a timer/counter the last time a task was switched in. */
|
|
|
+ PRIVILEGED_DATA static uint32_t ulTotalRunTime = 0UL; /*< Holds the total amount of execution time as defined by the run time counter clock. */
|
|
|
+
|
|
|
+#endif
|
|
|
+
|
|
|
+/*lint +e956 */
|
|
|
+
|
|
|
+/* Debugging and trace facilities private variables and macros. ------------*/
|
|
|
+
|
|
|
+/*
|
|
|
+ * The value used to fill the stack of a task when the task is created. This
|
|
|
+ * is used purely for checking the high water mark for tasks.
|
|
|
+ */
|
|
|
+#define tskSTACK_FILL_BYTE ( 0xa5U )
|
|
|
+
|
|
|
+/*
|
|
|
+ * Macros used by vListTask to indicate which state a task is in.
|
|
|
+ */
|
|
|
+#define tskBLOCKED_CHAR ( 'B' )
|
|
|
+#define tskREADY_CHAR ( 'R' )
|
|
|
+#define tskDELETED_CHAR ( 'D' )
|
|
|
+#define tskSUSPENDED_CHAR ( 'S' )
|
|
|
+
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( configUSE_PORT_OPTIMISED_TASK_SELECTION == 0 )
|
|
|
+
|
|
|
+ /* If configUSE_PORT_OPTIMISED_TASK_SELECTION is 0 then task selection is
|
|
|
+ performed in a generic way that is not optimised to any particular
|
|
|
+ microcontroller architecture. */
|
|
|
+
|
|
|
+ /* uxTopReadyPriority holds the priority of the highest priority ready
|
|
|
+ state task. */
|
|
|
+ #define taskRECORD_READY_PRIORITY( uxPriority ) \
|
|
|
+ { \
|
|
|
+ if( ( uxPriority ) > uxTopReadyPriority ) \
|
|
|
+ { \
|
|
|
+ uxTopReadyPriority = ( uxPriority ); \
|
|
|
+ } \
|
|
|
+ } /* taskRECORD_READY_PRIORITY */
|
|
|
+
|
|
|
+ /*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+ #define taskSELECT_HIGHEST_PRIORITY_TASK() \
|
|
|
+ { \
|
|
|
+ /* Find the highest priority queue that contains ready tasks. */ \
|
|
|
+ while( listLIST_IS_EMPTY( &( pxReadyTasksLists[ uxTopReadyPriority ] ) ) ) \
|
|
|
+ { \
|
|
|
+ configASSERT( uxTopReadyPriority ); \
|
|
|
+ --uxTopReadyPriority; \
|
|
|
+ } \
|
|
|
+ \
|
|
|
+ /* listGET_OWNER_OF_NEXT_ENTRY indexes through the list, so the tasks of \
|
|
|
+ the same priority get an equal share of the processor time. */ \
|
|
|
+ listGET_OWNER_OF_NEXT_ENTRY( pxCurrentTCB, &( pxReadyTasksLists[ uxTopReadyPriority ] ) ); \
|
|
|
+ } /* taskSELECT_HIGHEST_PRIORITY_TASK */
|
|
|
+
|
|
|
+ /*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+ /* Define away taskRESET_READY_PRIORITY() and portRESET_READY_PRIORITY() as
|
|
|
+ they are only required when a port optimised method of task selection is
|
|
|
+ being used. */
|
|
|
+ #define taskRESET_READY_PRIORITY( uxPriority )
|
|
|
+ #define portRESET_READY_PRIORITY( uxPriority, uxTopReadyPriority )
|
|
|
+
|
|
|
+#else /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
|
|
|
+
|
|
|
+ /* If configUSE_PORT_OPTIMISED_TASK_SELECTION is 1 then task selection is
|
|
|
+ performed in a way that is tailored to the particular microcontroller
|
|
|
+ architecture being used. */
|
|
|
+
|
|
|
+ /* A port optimised version is provided. Call the port defined macros. */
|
|
|
+ #define taskRECORD_READY_PRIORITY( uxPriority ) portRECORD_READY_PRIORITY( uxPriority, uxTopReadyPriority )
|
|
|
+
|
|
|
+ /*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+ #define taskSELECT_HIGHEST_PRIORITY_TASK() \
|
|
|
+ { \
|
|
|
+ UBaseType_t uxTopPriority; \
|
|
|
+ \
|
|
|
+ /* Find the highest priority queue that contains ready tasks. */ \
|
|
|
+ portGET_HIGHEST_PRIORITY( uxTopPriority, uxTopReadyPriority ); \
|
|
|
+ configASSERT( listCURRENT_LIST_LENGTH( &( pxReadyTasksLists[ uxTopPriority ] ) ) > 0 ); \
|
|
|
+ listGET_OWNER_OF_NEXT_ENTRY( pxCurrentTCB, &( pxReadyTasksLists[ uxTopPriority ] ) ); \
|
|
|
+ } /* taskSELECT_HIGHEST_PRIORITY_TASK() */
|
|
|
+
|
|
|
+ /*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+ /* A port optimised version is provided, call it only if the TCB being reset
|
|
|
+ is being referenced from a ready list. If it is referenced from a delayed
|
|
|
+ or suspended list then it won't be in a ready list. */
|
|
|
+ #define taskRESET_READY_PRIORITY( uxPriority ) \
|
|
|
+ { \
|
|
|
+ if( listCURRENT_LIST_LENGTH( &( pxReadyTasksLists[ ( uxPriority ) ] ) ) == ( UBaseType_t ) 0 ) \
|
|
|
+ { \
|
|
|
+ portRESET_READY_PRIORITY( ( uxPriority ), ( uxTopReadyPriority ) ); \
|
|
|
+ } \
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
|
|
|
+
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+/* pxDelayedTaskList and pxOverflowDelayedTaskList are switched when the tick
|
|
|
+count overflows. */
|
|
|
+#define taskSWITCH_DELAYED_LISTS() \
|
|
|
+{ \
|
|
|
+ List_t *pxTemp; \
|
|
|
+ \
|
|
|
+ /* The delayed tasks list should be empty when the lists are switched. */ \
|
|
|
+ configASSERT( ( listLIST_IS_EMPTY( pxDelayedTaskList ) ) ); \
|
|
|
+ \
|
|
|
+ pxTemp = pxDelayedTaskList; \
|
|
|
+ pxDelayedTaskList = pxOverflowDelayedTaskList; \
|
|
|
+ pxOverflowDelayedTaskList = pxTemp; \
|
|
|
+ xNumOfOverflows++; \
|
|
|
+ prvResetNextTaskUnblockTime(); \
|
|
|
+}
|
|
|
+
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+/*
|
|
|
+ * Place the task represented by pxTCB into the appropriate ready list for
|
|
|
+ * the task. It is inserted at the end of the list.
|
|
|
+ */
|
|
|
+#define prvAddTaskToReadyList( pxTCB ) \
|
|
|
+ traceMOVED_TASK_TO_READY_STATE( pxTCB ) \
|
|
|
+ taskRECORD_READY_PRIORITY( ( pxTCB )->uxPriority ); \
|
|
|
+ vListInsertEnd( &( pxReadyTasksLists[ ( pxTCB )->uxPriority ] ), &( ( pxTCB )->xGenericListItem ) )
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+/*
|
|
|
+ * Several functions take an TaskHandle_t parameter that can optionally be NULL,
|
|
|
+ * where NULL is used to indicate that the handle of the currently executing
|
|
|
+ * task should be used in place of the parameter. This macro simply checks to
|
|
|
+ * see if the parameter is NULL and returns a pointer to the appropriate TCB.
|
|
|
+ */
|
|
|
+#define prvGetTCBFromHandle( pxHandle ) ( ( ( pxHandle ) == NULL ) ? ( TCB_t * ) pxCurrentTCB : ( TCB_t * ) ( pxHandle ) )
|
|
|
+
|
|
|
+/* The item value of the event list item is normally used to hold the priority
|
|
|
+of the task to which it belongs (coded to allow it to be held in reverse
|
|
|
+priority order). However, it is occasionally borrowed for other purposes. It
|
|
|
+is important its value is not updated due to a task priority change while it is
|
|
|
+being used for another purpose. The following bit definition is used to inform
|
|
|
+the scheduler that the value should not be changed - in which case it is the
|
|
|
+responsibility of whichever module is using the value to ensure it gets set back
|
|
|
+to its original value when it is released. */
|
|
|
+#if configUSE_16_BIT_TICKS == 1
|
|
|
+ #define taskEVENT_LIST_ITEM_VALUE_IN_USE 0x8000U
|
|
|
+#else
|
|
|
+ #define taskEVENT_LIST_ITEM_VALUE_IN_USE 0x80000000UL
|
|
|
+#endif
|
|
|
+
|
|
|
+/* Callback function prototypes. --------------------------*/
|
|
|
+#if configCHECK_FOR_STACK_OVERFLOW > 0
|
|
|
+ extern void vApplicationStackOverflowHook( TaskHandle_t xTask, char *pcTaskName );
|
|
|
+#endif
|
|
|
+
|
|
|
+#if configUSE_TICK_HOOK > 0
|
|
|
+ extern void vApplicationTickHook( void );
|
|
|
+#endif
|
|
|
+
|
|
|
+/* File private functions. --------------------------------*/
|
|
|
+
|
|
|
+/*
|
|
|
+ * Utility to ready a TCB for a given task. Mainly just copies the parameters
|
|
|
+ * into the TCB structure.
|
|
|
+ */
|
|
|
+static void prvInitialiseTCBVariables( TCB_t * const pxTCB, const char * const pcName, UBaseType_t uxPriority, const MemoryRegion_t * const xRegions, const uint16_t usStackDepth ) PRIVILEGED_FUNCTION; /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
|
|
|
+
|
|
|
+/**
|
|
|
+ * Utility task that simply returns pdTRUE if the task referenced by xTask is
|
|
|
+ * currently in the Suspended state, or pdFALSE if the task referenced by xTask
|
|
|
+ * is in any other state.
|
|
|
+ */
|
|
|
+#if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+ static BaseType_t prvTaskIsTaskSuspended( const TaskHandle_t xTask ) PRIVILEGED_FUNCTION;
|
|
|
+#endif /* INCLUDE_vTaskSuspend */
|
|
|
+
|
|
|
+/*
|
|
|
+ * Utility to ready all the lists used by the scheduler. This is called
|
|
|
+ * automatically upon the creation of the first task.
|
|
|
+ */
|
|
|
+static void prvInitialiseTaskLists( void ) PRIVILEGED_FUNCTION;
|
|
|
+
|
|
|
+/*
|
|
|
+ * The idle task, which as all tasks is implemented as a never ending loop.
|
|
|
+ * The idle task is automatically created and added to the ready lists upon
|
|
|
+ * creation of the first user task.
|
|
|
+ *
|
|
|
+ * The portTASK_FUNCTION_PROTO() macro is used to allow port/compiler specific
|
|
|
+ * language extensions. The equivalent prototype for this function is:
|
|
|
+ *
|
|
|
+ * void prvIdleTask( void *pvParameters );
|
|
|
+ *
|
|
|
+ */
|
|
|
+static portTASK_FUNCTION_PROTO( prvIdleTask, pvParameters );
|
|
|
+
|
|
|
+/*
|
|
|
+ * Utility to free all memory allocated by the scheduler to hold a TCB,
|
|
|
+ * including the stack pointed to by the TCB.
|
|
|
+ *
|
|
|
+ * This does not free memory allocated by the task itself (i.e. memory
|
|
|
+ * allocated by calls to pvPortMalloc from within the tasks application code).
|
|
|
+ */
|
|
|
+#if ( INCLUDE_vTaskDelete == 1 )
|
|
|
+
|
|
|
+ static void prvDeleteTCB( TCB_t *pxTCB ) PRIVILEGED_FUNCTION;
|
|
|
+
|
|
|
+#endif
|
|
|
+
|
|
|
+/*
|
|
|
+ * Used only by the idle task. This checks to see if anything has been placed
|
|
|
+ * in the list of tasks waiting to be deleted. If so the task is cleaned up
|
|
|
+ * and its TCB deleted.
|
|
|
+ */
|
|
|
+static void prvCheckTasksWaitingTermination( void ) PRIVILEGED_FUNCTION;
|
|
|
+
|
|
|
+/*
|
|
|
+ * The currently executing task is entering the Blocked state. Add the task to
|
|
|
+ * either the current or the overflow delayed task list.
|
|
|
+ */
|
|
|
+static void prvAddCurrentTaskToDelayedList( const TickType_t xTimeToWake ) PRIVILEGED_FUNCTION;
|
|
|
+
|
|
|
+/*
|
|
|
+ * Allocates memory from the heap for a TCB and associated stack. Checks the
|
|
|
+ * allocation was successful.
|
|
|
+ */
|
|
|
+static TCB_t *prvAllocateTCBAndStack( const uint16_t usStackDepth, StackType_t * const puxStackBuffer ) PRIVILEGED_FUNCTION;
|
|
|
+
|
|
|
+/*
|
|
|
+ * Fills an TaskStatus_t structure with information on each task that is
|
|
|
+ * referenced from the pxList list (which may be a ready list, a delayed list,
|
|
|
+ * a suspended list, etc.).
|
|
|
+ *
|
|
|
+ * THIS FUNCTION IS INTENDED FOR DEBUGGING ONLY, AND SHOULD NOT BE CALLED FROM
|
|
|
+ * NORMAL APPLICATION CODE.
|
|
|
+ */
|
|
|
+#if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
+
|
|
|
+ static UBaseType_t prvListTaskWithinSingleList( TaskStatus_t *pxTaskStatusArray, List_t *pxList, eTaskState eState ) PRIVILEGED_FUNCTION;
|
|
|
+
|
|
|
+#endif
|
|
|
+
|
|
|
+/*
|
|
|
+ * When a task is created, the stack of the task is filled with a known value.
|
|
|
+ * This function determines the 'high water mark' of the task stack by
|
|
|
+ * determining how much of the stack remains at the original preset value.
|
|
|
+ */
|
|
|
+#if ( ( configUSE_TRACE_FACILITY == 1 ) || ( INCLUDE_uxTaskGetStackHighWaterMark == 1 ) )
|
|
|
+
|
|
|
+ static uint16_t prvTaskCheckFreeStackSpace( const uint8_t * pucStackByte ) PRIVILEGED_FUNCTION;
|
|
|
+
|
|
|
+#endif
|
|
|
+
|
|
|
+/*
|
|
|
+ * Return the amount of time, in ticks, that will pass before the kernel will
|
|
|
+ * next move a task from the Blocked state to the Running state.
|
|
|
+ *
|
|
|
+ * This conditional compilation should use inequality to 0, not equality to 1.
|
|
|
+ * This is to ensure portSUPPRESS_TICKS_AND_SLEEP() can be called when user
|
|
|
+ * defined low power mode implementations require configUSE_TICKLESS_IDLE to be
|
|
|
+ * set to a value other than 1.
|
|
|
+ */
|
|
|
+#if ( configUSE_TICKLESS_IDLE != 0 )
|
|
|
+
|
|
|
+ static TickType_t prvGetExpectedIdleTime( void ) PRIVILEGED_FUNCTION;
|
|
|
+
|
|
|
+#endif
|
|
|
+
|
|
|
+/*
|
|
|
+ * Set xNextTaskUnblockTime to the time at which the next Blocked state task
|
|
|
+ * will exit the Blocked state.
|
|
|
+ */
|
|
|
+static void prvResetNextTaskUnblockTime( void );
|
|
|
+
|
|
|
+#if ( ( configUSE_TRACE_FACILITY == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) )
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Helper function used to pad task names with spaces when printing out
|
|
|
+ * human readable tables of task information.
|
|
|
+ */
|
|
|
+ static char *prvWriteNameToBuffer( char *pcBuffer, const char *pcTaskName );
|
|
|
+
|
|
|
+#endif
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+BaseType_t xTaskGenericCreate( TaskFunction_t pxTaskCode, const char * const pcName, const uint16_t usStackDepth, void * const pvParameters, UBaseType_t uxPriority, TaskHandle_t * const pxCreatedTask, StackType_t * const puxStackBuffer, const MemoryRegion_t * const xRegions ) /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
|
|
|
+{
|
|
|
+BaseType_t xReturn;
|
|
|
+TCB_t * pxNewTCB;
|
|
|
+StackType_t *pxTopOfStack;
|
|
|
+
|
|
|
+ configASSERT( pxTaskCode );
|
|
|
+ configASSERT( ( ( uxPriority & ( ~portPRIVILEGE_BIT ) ) < configMAX_PRIORITIES ) );
|
|
|
+
|
|
|
+ /* Allocate the memory required by the TCB and stack for the new task,
|
|
|
+ checking that the allocation was successful. */
|
|
|
+ pxNewTCB = prvAllocateTCBAndStack( usStackDepth, puxStackBuffer );
|
|
|
+
|
|
|
+ if( pxNewTCB != NULL )
|
|
|
+ {
|
|
|
+ #if( portUSING_MPU_WRAPPERS == 1 )
|
|
|
+ /* Should the task be created in privileged mode? */
|
|
|
+ BaseType_t xRunPrivileged;
|
|
|
+ if( ( uxPriority & portPRIVILEGE_BIT ) != 0U )
|
|
|
+ {
|
|
|
+ xRunPrivileged = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ xRunPrivileged = pdFALSE;
|
|
|
+ }
|
|
|
+ uxPriority &= ~portPRIVILEGE_BIT;
|
|
|
+
|
|
|
+ if( puxStackBuffer != NULL )
|
|
|
+ {
|
|
|
+ /* The application provided its own stack. Note this so no
|
|
|
+ attempt is made to delete the stack should that task be
|
|
|
+ deleted. */
|
|
|
+ pxNewTCB->xUsingStaticallyAllocatedStack = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The stack was allocated dynamically. Note this so it can be
|
|
|
+ deleted again if the task is deleted. */
|
|
|
+ pxNewTCB->xUsingStaticallyAllocatedStack = pdFALSE;
|
|
|
+ }
|
|
|
+ #endif /* portUSING_MPU_WRAPPERS == 1 */
|
|
|
+
|
|
|
+ /* Calculate the top of stack address. This depends on whether the
|
|
|
+ stack grows from high memory to low (as per the 80x86) or vice versa.
|
|
|
+ portSTACK_GROWTH is used to make the result positive or negative as
|
|
|
+ required by the port. */
|
|
|
+ #if( portSTACK_GROWTH < 0 )
|
|
|
+ {
|
|
|
+ pxTopOfStack = pxNewTCB->pxStack + ( usStackDepth - ( uint16_t ) 1 );
|
|
|
+ pxTopOfStack = ( StackType_t * ) ( ( ( portPOINTER_SIZE_TYPE ) pxTopOfStack ) & ( ( portPOINTER_SIZE_TYPE ) ~portBYTE_ALIGNMENT_MASK ) ); /*lint !e923 MISRA exception. Avoiding casts between pointers and integers is not practical. Size differences accounted for using portPOINTER_SIZE_TYPE type. */
|
|
|
+
|
|
|
+ /* Check the alignment of the calculated top of stack is correct. */
|
|
|
+ configASSERT( ( ( ( portPOINTER_SIZE_TYPE ) pxTopOfStack & ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) == 0UL ) );
|
|
|
+ }
|
|
|
+ #else /* portSTACK_GROWTH */
|
|
|
+ {
|
|
|
+ pxTopOfStack = pxNewTCB->pxStack;
|
|
|
+
|
|
|
+ /* Check the alignment of the stack buffer is correct. */
|
|
|
+ configASSERT( ( ( ( portPOINTER_SIZE_TYPE ) pxNewTCB->pxStack & ( portPOINTER_SIZE_TYPE ) portBYTE_ALIGNMENT_MASK ) == 0UL ) );
|
|
|
+
|
|
|
+ /* If we want to use stack checking on architectures that use
|
|
|
+ a positive stack growth direction then we also need to store the
|
|
|
+ other extreme of the stack space. */
|
|
|
+ pxNewTCB->pxEndOfStack = pxNewTCB->pxStack + ( usStackDepth - 1 );
|
|
|
+ }
|
|
|
+ #endif /* portSTACK_GROWTH */
|
|
|
+
|
|
|
+ /* Setup the newly allocated TCB with the initial state of the task. */
|
|
|
+ prvInitialiseTCBVariables( pxNewTCB, pcName, uxPriority, xRegions, usStackDepth );
|
|
|
+
|
|
|
+ /* Initialize the TCB stack to look as if the task was already running,
|
|
|
+ but had been interrupted by the scheduler. The return address is set
|
|
|
+ to the start of the task function. Once the stack has been initialised
|
|
|
+ the top of stack variable is updated. */
|
|
|
+ #if( portUSING_MPU_WRAPPERS == 1 )
|
|
|
+ {
|
|
|
+ pxNewTCB->pxTopOfStack = pxPortInitialiseStack( pxTopOfStack, pxTaskCode, pvParameters, xRunPrivileged );
|
|
|
+ }
|
|
|
+ #else /* portUSING_MPU_WRAPPERS */
|
|
|
+ {
|
|
|
+ pxNewTCB->pxTopOfStack = pxPortInitialiseStack( pxTopOfStack, pxTaskCode, pvParameters );
|
|
|
+ }
|
|
|
+ #endif /* portUSING_MPU_WRAPPERS */
|
|
|
+
|
|
|
+ if( ( void * ) pxCreatedTask != NULL )
|
|
|
+ {
|
|
|
+ /* Pass the TCB out - in an anonymous way. The calling function/
|
|
|
+ task can use this as a handle to delete the task later if
|
|
|
+ required.*/
|
|
|
+ *pxCreatedTask = ( TaskHandle_t ) pxNewTCB;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Ensure interrupts don't access the task lists while they are being
|
|
|
+ updated. */
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ uxCurrentNumberOfTasks++;
|
|
|
+ if( pxCurrentTCB == NULL )
|
|
|
+ {
|
|
|
+ /* There are no other tasks, or all the other tasks are in
|
|
|
+ the suspended state - make this the current task. */
|
|
|
+ pxCurrentTCB = pxNewTCB;
|
|
|
+
|
|
|
+ if( uxCurrentNumberOfTasks == ( UBaseType_t ) 1 )
|
|
|
+ {
|
|
|
+ /* This is the first task to be created so do the preliminary
|
|
|
+ initialisation required. We will not recover if this call
|
|
|
+ fails, but we will report the failure. */
|
|
|
+ prvInitialiseTaskLists();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* If the scheduler is not already running, make this task the
|
|
|
+ current task if it is the highest priority task to be created
|
|
|
+ so far. */
|
|
|
+ if( xSchedulerRunning == pdFALSE )
|
|
|
+ {
|
|
|
+ if( pxCurrentTCB->uxPriority <= uxPriority )
|
|
|
+ {
|
|
|
+ pxCurrentTCB = pxNewTCB;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ uxTaskNumber++;
|
|
|
+
|
|
|
+ #if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
+ {
|
|
|
+ /* Add a counter into the TCB for tracing only. */
|
|
|
+ pxNewTCB->uxTCBNumber = uxTaskNumber;
|
|
|
+ }
|
|
|
+ #endif /* configUSE_TRACE_FACILITY */
|
|
|
+ traceTASK_CREATE( pxNewTCB );
|
|
|
+
|
|
|
+ prvAddTaskToReadyList( pxNewTCB );
|
|
|
+
|
|
|
+ xReturn = pdPASS;
|
|
|
+ portSETUP_TCB( pxNewTCB );
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ xReturn = errCOULD_NOT_ALLOCATE_REQUIRED_MEMORY;
|
|
|
+ traceTASK_CREATE_FAILED();
|
|
|
+ }
|
|
|
+
|
|
|
+ if( xReturn == pdPASS )
|
|
|
+ {
|
|
|
+ if( xSchedulerRunning != pdFALSE )
|
|
|
+ {
|
|
|
+ /* If the created task is of a higher priority than the current task
|
|
|
+ then it should run now. */
|
|
|
+ if( pxCurrentTCB->uxPriority < uxPriority )
|
|
|
+ {
|
|
|
+ taskYIELD_IF_USING_PREEMPTION();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_vTaskDelete == 1 )
|
|
|
+
|
|
|
+ void vTaskDelete( TaskHandle_t xTaskToDelete )
|
|
|
+ {
|
|
|
+ TCB_t *pxTCB;
|
|
|
+
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ /* If null is passed in here then it is the calling task that is
|
|
|
+ being deleted. */
|
|
|
+ pxTCB = prvGetTCBFromHandle( xTaskToDelete );
|
|
|
+
|
|
|
+ /* Remove task from the ready list and place in the termination list.
|
|
|
+ This will stop the task from be scheduled. The idle task will check
|
|
|
+ the termination list and free up any memory allocated by the
|
|
|
+ scheduler for the TCB and stack. */
|
|
|
+ if( uxListRemove( &( pxTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ taskRESET_READY_PRIORITY( pxTCB->uxPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Is the task waiting on an event also? */
|
|
|
+ if( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) != NULL )
|
|
|
+ {
|
|
|
+ ( void ) uxListRemove( &( pxTCB->xEventListItem ) );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ vListInsertEnd( &xTasksWaitingTermination, &( pxTCB->xGenericListItem ) );
|
|
|
+
|
|
|
+ /* Increment the ucTasksDeleted variable so the idle task knows
|
|
|
+ there is a task that has been deleted and that it should therefore
|
|
|
+ check the xTasksWaitingTermination list. */
|
|
|
+ ++uxTasksDeleted;
|
|
|
+
|
|
|
+ /* Increment the uxTaskNumberVariable also so kernel aware debuggers
|
|
|
+ can detect that the task lists need re-generating. */
|
|
|
+ uxTaskNumber++;
|
|
|
+
|
|
|
+ traceTASK_DELETE( pxTCB );
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ /* Force a reschedule if it is the currently running task that has just
|
|
|
+ been deleted. */
|
|
|
+ if( xSchedulerRunning != pdFALSE )
|
|
|
+ {
|
|
|
+ if( pxTCB == pxCurrentTCB )
|
|
|
+ {
|
|
|
+ configASSERT( uxSchedulerSuspended == 0 );
|
|
|
+
|
|
|
+ /* The pre-delete hook is primarily for the Windows simulator,
|
|
|
+ in which Windows specific clean up operations are performed,
|
|
|
+ after which it is not possible to yield away from this task -
|
|
|
+ hence xYieldPending is used to latch that a context switch is
|
|
|
+ required. */
|
|
|
+ portPRE_TASK_DELETE_HOOK( pxTCB, &xYieldPending );
|
|
|
+ portYIELD_WITHIN_API();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* Reset the next expected unblock time in case it referred to
|
|
|
+ the task that has just been deleted. */
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ prvResetNextTaskUnblockTime();
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* INCLUDE_vTaskDelete */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_vTaskDelayUntil == 1 )
|
|
|
+
|
|
|
+ void vTaskDelayUntil( TickType_t * const pxPreviousWakeTime, const TickType_t xTimeIncrement )
|
|
|
+ {
|
|
|
+ TickType_t xTimeToWake;
|
|
|
+ BaseType_t xAlreadyYielded, xShouldDelay = pdFALSE;
|
|
|
+
|
|
|
+ configASSERT( pxPreviousWakeTime );
|
|
|
+ configASSERT( ( xTimeIncrement > 0U ) );
|
|
|
+ configASSERT( uxSchedulerSuspended == 0 );
|
|
|
+
|
|
|
+ vTaskSuspendAll();
|
|
|
+ {
|
|
|
+ /* Minor optimisation. The tick count cannot change in this
|
|
|
+ block. */
|
|
|
+ const TickType_t xConstTickCount = xTickCount;
|
|
|
+
|
|
|
+ /* Generate the tick time at which the task wants to wake. */
|
|
|
+ xTimeToWake = *pxPreviousWakeTime + xTimeIncrement;
|
|
|
+
|
|
|
+ if( xConstTickCount < *pxPreviousWakeTime )
|
|
|
+ {
|
|
|
+ /* The tick count has overflowed since this function was
|
|
|
+ lasted called. In this case the only time we should ever
|
|
|
+ actually delay is if the wake time has also overflowed,
|
|
|
+ and the wake time is greater than the tick time. When this
|
|
|
+ is the case it is as if neither time had overflowed. */
|
|
|
+ if( ( xTimeToWake < *pxPreviousWakeTime ) && ( xTimeToWake > xConstTickCount ) )
|
|
|
+ {
|
|
|
+ xShouldDelay = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The tick time has not overflowed. In this case we will
|
|
|
+ delay if either the wake time has overflowed, and/or the
|
|
|
+ tick time is less than the wake time. */
|
|
|
+ if( ( xTimeToWake < *pxPreviousWakeTime ) || ( xTimeToWake > xConstTickCount ) )
|
|
|
+ {
|
|
|
+ xShouldDelay = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Update the wake time ready for the next call. */
|
|
|
+ *pxPreviousWakeTime = xTimeToWake;
|
|
|
+
|
|
|
+ if( xShouldDelay != pdFALSE )
|
|
|
+ {
|
|
|
+ traceTASK_DELAY_UNTIL();
|
|
|
+
|
|
|
+ /* Remove the task from the ready list before adding it to the
|
|
|
+ blocked list as the same list item is used for both lists. */
|
|
|
+ if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ /* The current task must be in a ready list, so there is
|
|
|
+ no need to check, and the port reset macro can be called
|
|
|
+ directly. */
|
|
|
+ portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ xAlreadyYielded = xTaskResumeAll();
|
|
|
+
|
|
|
+ /* Force a reschedule if xTaskResumeAll has not already done so, we may
|
|
|
+ have put ourselves to sleep. */
|
|
|
+ if( xAlreadyYielded == pdFALSE )
|
|
|
+ {
|
|
|
+ portYIELD_WITHIN_API();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* INCLUDE_vTaskDelayUntil */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_vTaskDelay == 1 )
|
|
|
+
|
|
|
+ void vTaskDelay( const TickType_t xTicksToDelay )
|
|
|
+ {
|
|
|
+ TickType_t xTimeToWake;
|
|
|
+ BaseType_t xAlreadyYielded = pdFALSE;
|
|
|
+
|
|
|
+
|
|
|
+ /* A delay time of zero just forces a reschedule. */
|
|
|
+ if( xTicksToDelay > ( TickType_t ) 0U )
|
|
|
+ {
|
|
|
+ configASSERT( uxSchedulerSuspended == 0 );
|
|
|
+ vTaskSuspendAll();
|
|
|
+ {
|
|
|
+ traceTASK_DELAY();
|
|
|
+
|
|
|
+ /* A task that is removed from the event list while the
|
|
|
+ scheduler is suspended will not get placed in the ready
|
|
|
+ list or removed from the blocked list until the scheduler
|
|
|
+ is resumed.
|
|
|
+
|
|
|
+ This task cannot be in an event list as it is the currently
|
|
|
+ executing task. */
|
|
|
+
|
|
|
+ /* Calculate the time to wake - this may overflow but this is
|
|
|
+ not a problem. */
|
|
|
+ xTimeToWake = xTickCount + xTicksToDelay;
|
|
|
+
|
|
|
+ /* We must remove ourselves from the ready list before adding
|
|
|
+ ourselves to the blocked list as the same list item is used for
|
|
|
+ both lists. */
|
|
|
+ if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ /* The current task must be in a ready list, so there is
|
|
|
+ no need to check, and the port reset macro can be called
|
|
|
+ directly. */
|
|
|
+ portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
+ }
|
|
|
+ xAlreadyYielded = xTaskResumeAll();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Force a reschedule if xTaskResumeAll has not already done so, we may
|
|
|
+ have put ourselves to sleep. */
|
|
|
+ if( xAlreadyYielded == pdFALSE )
|
|
|
+ {
|
|
|
+ portYIELD_WITHIN_API();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* INCLUDE_vTaskDelay */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_eTaskGetState == 1 )
|
|
|
+
|
|
|
+ eTaskState eTaskGetState( TaskHandle_t xTask )
|
|
|
+ {
|
|
|
+ eTaskState eReturn;
|
|
|
+ List_t *pxStateList;
|
|
|
+ const TCB_t * const pxTCB = ( TCB_t * ) xTask;
|
|
|
+
|
|
|
+ configASSERT( pxTCB );
|
|
|
+
|
|
|
+ if( pxTCB == pxCurrentTCB )
|
|
|
+ {
|
|
|
+ /* The task calling this function is querying its own state. */
|
|
|
+ eReturn = eRunning;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ pxStateList = ( List_t * ) listLIST_ITEM_CONTAINER( &( pxTCB->xGenericListItem ) );
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ if( ( pxStateList == pxDelayedTaskList ) || ( pxStateList == pxOverflowDelayedTaskList ) )
|
|
|
+ {
|
|
|
+ /* The task being queried is referenced from one of the Blocked
|
|
|
+ lists. */
|
|
|
+ eReturn = eBlocked;
|
|
|
+ }
|
|
|
+
|
|
|
+ #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+ else if( pxStateList == &xSuspendedTaskList )
|
|
|
+ {
|
|
|
+ /* The task being queried is referenced from the suspended
|
|
|
+ list. Is it genuinely suspended or is it block
|
|
|
+ indefinitely? */
|
|
|
+ if( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) == NULL )
|
|
|
+ {
|
|
|
+ eReturn = eSuspended;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ eReturn = eBlocked;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( INCLUDE_vTaskDelete == 1 )
|
|
|
+ else if( pxStateList == &xTasksWaitingTermination )
|
|
|
+ {
|
|
|
+ /* The task being queried is referenced from the deleted
|
|
|
+ tasks list. */
|
|
|
+ eReturn = eDeleted;
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ else /*lint !e525 Negative indentation is intended to make use of pre-processor clearer. */
|
|
|
+ {
|
|
|
+ /* If the task is not in any other state, it must be in the
|
|
|
+ Ready (including pending ready) state. */
|
|
|
+ eReturn = eReady;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return eReturn;
|
|
|
+ } /*lint !e818 xTask cannot be a pointer to const because it is a typedef. */
|
|
|
+
|
|
|
+#endif /* INCLUDE_eTaskGetState */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_uxTaskPriorityGet == 1 )
|
|
|
+
|
|
|
+ UBaseType_t uxTaskPriorityGet( TaskHandle_t xTask )
|
|
|
+ {
|
|
|
+ TCB_t *pxTCB;
|
|
|
+ UBaseType_t uxReturn;
|
|
|
+
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ /* If null is passed in here then we are changing the
|
|
|
+ priority of the calling function. */
|
|
|
+ pxTCB = prvGetTCBFromHandle( xTask );
|
|
|
+ uxReturn = pxTCB->uxPriority;
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ return uxReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* INCLUDE_uxTaskPriorityGet */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_uxTaskPriorityGet == 1 )
|
|
|
+
|
|
|
+ UBaseType_t uxTaskPriorityGetFromISR( TaskHandle_t xTask )
|
|
|
+ {
|
|
|
+ TCB_t *pxTCB;
|
|
|
+ UBaseType_t uxReturn, uxSavedInterruptState;
|
|
|
+
|
|
|
+ /* RTOS ports that support interrupt nesting have the concept of a
|
|
|
+ maximum system call (or maximum API call) interrupt priority.
|
|
|
+ Interrupts that are above the maximum system call priority are keep
|
|
|
+ permanently enabled, even when the RTOS kernel is in a critical section,
|
|
|
+ but cannot make any calls to FreeRTOS API functions. If configASSERT()
|
|
|
+ is defined in FreeRTOSConfig.h then
|
|
|
+ portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion
|
|
|
+ failure if a FreeRTOS API function is called from an interrupt that has
|
|
|
+ been assigned a priority above the configured maximum system call
|
|
|
+ priority. Only FreeRTOS functions that end in FromISR can be called
|
|
|
+ from interrupts that have been assigned a priority at or (logically)
|
|
|
+ below the maximum system call interrupt priority. FreeRTOS maintains a
|
|
|
+ separate interrupt safe API to ensure interrupt entry is as fast and as
|
|
|
+ simple as possible. More information (albeit Cortex-M specific) is
|
|
|
+ provided on the following link:
|
|
|
+ http://www.freertos.org/RTOS-Cortex-M3-M4.html */
|
|
|
+ portASSERT_IF_INTERRUPT_PRIORITY_INVALID();
|
|
|
+
|
|
|
+ uxSavedInterruptState = portSET_INTERRUPT_MASK_FROM_ISR();
|
|
|
+ {
|
|
|
+ /* If null is passed in here then it is the priority of the calling
|
|
|
+ task that is being queried. */
|
|
|
+ pxTCB = prvGetTCBFromHandle( xTask );
|
|
|
+ uxReturn = pxTCB->uxPriority;
|
|
|
+ }
|
|
|
+ portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptState );
|
|
|
+
|
|
|
+ return uxReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* INCLUDE_uxTaskPriorityGet */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_vTaskPrioritySet == 1 )
|
|
|
+
|
|
|
+ void vTaskPrioritySet( TaskHandle_t xTask, UBaseType_t uxNewPriority )
|
|
|
+ {
|
|
|
+ TCB_t *pxTCB;
|
|
|
+ UBaseType_t uxCurrentBasePriority, uxPriorityUsedOnEntry;
|
|
|
+ BaseType_t xYieldRequired = pdFALSE;
|
|
|
+
|
|
|
+ configASSERT( ( uxNewPriority < configMAX_PRIORITIES ) );
|
|
|
+
|
|
|
+ /* Ensure the new priority is valid. */
|
|
|
+ if( uxNewPriority >= ( UBaseType_t ) configMAX_PRIORITIES )
|
|
|
+ {
|
|
|
+ uxNewPriority = ( UBaseType_t ) configMAX_PRIORITIES - ( UBaseType_t ) 1U;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ /* If null is passed in here then it is the priority of the calling
|
|
|
+ task that is being changed. */
|
|
|
+ pxTCB = prvGetTCBFromHandle( xTask );
|
|
|
+
|
|
|
+ traceTASK_PRIORITY_SET( pxTCB, uxNewPriority );
|
|
|
+
|
|
|
+ #if ( configUSE_MUTEXES == 1 )
|
|
|
+ {
|
|
|
+ uxCurrentBasePriority = pxTCB->uxBasePriority;
|
|
|
+ }
|
|
|
+ #else
|
|
|
+ {
|
|
|
+ uxCurrentBasePriority = pxTCB->uxPriority;
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ if( uxCurrentBasePriority != uxNewPriority )
|
|
|
+ {
|
|
|
+ /* The priority change may have readied a task of higher
|
|
|
+ priority than the calling task. */
|
|
|
+ if( uxNewPriority > uxCurrentBasePriority )
|
|
|
+ {
|
|
|
+ if( pxTCB != pxCurrentTCB )
|
|
|
+ {
|
|
|
+ /* The priority of a task other than the currently
|
|
|
+ running task is being raised. Is the priority being
|
|
|
+ raised above that of the running task? */
|
|
|
+ if( uxNewPriority >= pxCurrentTCB->uxPriority )
|
|
|
+ {
|
|
|
+ xYieldRequired = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The priority of the running task is being raised,
|
|
|
+ but the running task must already be the highest
|
|
|
+ priority task able to run so no yield is required. */
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else if( pxTCB == pxCurrentTCB )
|
|
|
+ {
|
|
|
+ /* Setting the priority of the running task down means
|
|
|
+ there may now be another task of higher priority that
|
|
|
+ is ready to execute. */
|
|
|
+ xYieldRequired = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* Setting the priority of any other task down does not
|
|
|
+ require a yield as the running task must be above the
|
|
|
+ new priority of the task being modified. */
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Remember the ready list the task might be referenced from
|
|
|
+ before its uxPriority member is changed so the
|
|
|
+ taskRESET_READY_PRIORITY() macro can function correctly. */
|
|
|
+ uxPriorityUsedOnEntry = pxTCB->uxPriority;
|
|
|
+
|
|
|
+ #if ( configUSE_MUTEXES == 1 )
|
|
|
+ {
|
|
|
+ /* Only change the priority being used if the task is not
|
|
|
+ currently using an inherited priority. */
|
|
|
+ if( pxTCB->uxBasePriority == pxTCB->uxPriority )
|
|
|
+ {
|
|
|
+ pxTCB->uxPriority = uxNewPriority;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* The base priority gets set whatever. */
|
|
|
+ pxTCB->uxBasePriority = uxNewPriority;
|
|
|
+ }
|
|
|
+ #else
|
|
|
+ {
|
|
|
+ pxTCB->uxPriority = uxNewPriority;
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ /* Only reset the event list item value if the value is not
|
|
|
+ being used for anything else. */
|
|
|
+ if( ( listGET_LIST_ITEM_VALUE( &( pxTCB->xEventListItem ) ) & taskEVENT_LIST_ITEM_VALUE_IN_USE ) == 0UL )
|
|
|
+ {
|
|
|
+ listSET_LIST_ITEM_VALUE( &( pxTCB->xEventListItem ), ( ( TickType_t ) configMAX_PRIORITIES - ( TickType_t ) uxNewPriority ) ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* If the task is in the blocked or suspended list we need do
|
|
|
+ nothing more than change it's priority variable. However, if
|
|
|
+ the task is in a ready list it needs to be removed and placed
|
|
|
+ in the list appropriate to its new priority. */
|
|
|
+ if( listIS_CONTAINED_WITHIN( &( pxReadyTasksLists[ uxPriorityUsedOnEntry ] ), &( pxTCB->xGenericListItem ) ) != pdFALSE )
|
|
|
+ {
|
|
|
+ /* The task is currently in its ready list - remove before adding
|
|
|
+ it to it's new ready list. As we are in a critical section we
|
|
|
+ can do this even if the scheduler is suspended. */
|
|
|
+ if( uxListRemove( &( pxTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ /* It is known that the task is in its ready list so
|
|
|
+ there is no need to check again and the port level
|
|
|
+ reset macro can be called directly. */
|
|
|
+ portRESET_READY_PRIORITY( uxPriorityUsedOnEntry, uxTopReadyPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ prvAddTaskToReadyList( pxTCB );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ if( xYieldRequired == pdTRUE )
|
|
|
+ {
|
|
|
+ taskYIELD_IF_USING_PREEMPTION();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Remove compiler warning about unused variables when the port
|
|
|
+ optimised task selection is not being used. */
|
|
|
+ ( void ) uxPriorityUsedOnEntry;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* INCLUDE_vTaskPrioritySet */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+
|
|
|
+ void vTaskSuspend( TaskHandle_t xTaskToSuspend )
|
|
|
+ {
|
|
|
+ TCB_t *pxTCB;
|
|
|
+
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ /* If null is passed in here then it is the running task that is
|
|
|
+ being suspended. */
|
|
|
+ pxTCB = prvGetTCBFromHandle( xTaskToSuspend );
|
|
|
+
|
|
|
+ traceTASK_SUSPEND( pxTCB );
|
|
|
+
|
|
|
+ /* Remove task from the ready/delayed list and place in the
|
|
|
+ suspended list. */
|
|
|
+ if( uxListRemove( &( pxTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ taskRESET_READY_PRIORITY( pxTCB->uxPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Is the task waiting on an event also? */
|
|
|
+ if( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) != NULL )
|
|
|
+ {
|
|
|
+ ( void ) uxListRemove( &( pxTCB->xEventListItem ) );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ vListInsertEnd( &xSuspendedTaskList, &( pxTCB->xGenericListItem ) );
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ if( pxTCB == pxCurrentTCB )
|
|
|
+ {
|
|
|
+ if( xSchedulerRunning != pdFALSE )
|
|
|
+ {
|
|
|
+ /* The current task has just been suspended. */
|
|
|
+ configASSERT( uxSchedulerSuspended == 0 );
|
|
|
+ portYIELD_WITHIN_API();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The scheduler is not running, but the task that was pointed
|
|
|
+ to by pxCurrentTCB has just been suspended and pxCurrentTCB
|
|
|
+ must be adjusted to point to a different task. */
|
|
|
+ if( listCURRENT_LIST_LENGTH( &xSuspendedTaskList ) == uxCurrentNumberOfTasks )
|
|
|
+ {
|
|
|
+ /* No other tasks are ready, so set pxCurrentTCB back to
|
|
|
+ NULL so when the next task is created pxCurrentTCB will
|
|
|
+ be set to point to it no matter what its relative priority
|
|
|
+ is. */
|
|
|
+ pxCurrentTCB = NULL;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ vTaskSwitchContext();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ if( xSchedulerRunning != pdFALSE )
|
|
|
+ {
|
|
|
+ /* A task other than the currently running task was suspended,
|
|
|
+ reset the next expected unblock time in case it referred to the
|
|
|
+ task that is now in the Suspended state. */
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ prvResetNextTaskUnblockTime();
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* INCLUDE_vTaskSuspend */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+
|
|
|
+ static BaseType_t prvTaskIsTaskSuspended( const TaskHandle_t xTask )
|
|
|
+ {
|
|
|
+ BaseType_t xReturn = pdFALSE;
|
|
|
+ const TCB_t * const pxTCB = ( TCB_t * ) xTask;
|
|
|
+
|
|
|
+ /* Accesses xPendingReadyList so must be called from a critical
|
|
|
+ section. */
|
|
|
+
|
|
|
+ /* It does not make sense to check if the calling task is suspended. */
|
|
|
+ configASSERT( xTask );
|
|
|
+
|
|
|
+ /* Is the task being resumed actually in the suspended list? */
|
|
|
+ if( listIS_CONTAINED_WITHIN( &xSuspendedTaskList, &( pxTCB->xGenericListItem ) ) != pdFALSE )
|
|
|
+ {
|
|
|
+ /* Has the task already been resumed from within an ISR? */
|
|
|
+ if( listIS_CONTAINED_WITHIN( &xPendingReadyList, &( pxTCB->xEventListItem ) ) == pdFALSE )
|
|
|
+ {
|
|
|
+ /* Is it in the suspended list because it is in the Suspended
|
|
|
+ state, or because is is blocked with no timeout? */
|
|
|
+ if( listIS_CONTAINED_WITHIN( NULL, &( pxTCB->xEventListItem ) ) != pdFALSE )
|
|
|
+ {
|
|
|
+ xReturn = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+ } /*lint !e818 xTask cannot be a pointer to const because it is a typedef. */
|
|
|
+
|
|
|
+#endif /* INCLUDE_vTaskSuspend */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+
|
|
|
+ void vTaskResume( TaskHandle_t xTaskToResume )
|
|
|
+ {
|
|
|
+ TCB_t * const pxTCB = ( TCB_t * ) xTaskToResume;
|
|
|
+
|
|
|
+ /* It does not make sense to resume the calling task. */
|
|
|
+ configASSERT( xTaskToResume );
|
|
|
+
|
|
|
+ /* The parameter cannot be NULL as it is impossible to resume the
|
|
|
+ currently executing task. */
|
|
|
+ if( ( pxTCB != NULL ) && ( pxTCB != pxCurrentTCB ) )
|
|
|
+ {
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ if( prvTaskIsTaskSuspended( pxTCB ) == pdTRUE )
|
|
|
+ {
|
|
|
+ traceTASK_RESUME( pxTCB );
|
|
|
+
|
|
|
+ /* As we are in a critical section we can access the ready
|
|
|
+ lists even if the scheduler is suspended. */
|
|
|
+ ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
+ prvAddTaskToReadyList( pxTCB );
|
|
|
+
|
|
|
+ /* We may have just resumed a higher priority task. */
|
|
|
+ if( pxTCB->uxPriority >= pxCurrentTCB->uxPriority )
|
|
|
+ {
|
|
|
+ /* This yield may not cause the task just resumed to run,
|
|
|
+ but will leave the lists in the correct state for the
|
|
|
+ next yield. */
|
|
|
+ taskYIELD_IF_USING_PREEMPTION();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* INCLUDE_vTaskSuspend */
|
|
|
+
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( ( INCLUDE_xTaskResumeFromISR == 1 ) && ( INCLUDE_vTaskSuspend == 1 ) )
|
|
|
+
|
|
|
+ BaseType_t xTaskResumeFromISR( TaskHandle_t xTaskToResume )
|
|
|
+ {
|
|
|
+ BaseType_t xYieldRequired = pdFALSE;
|
|
|
+ TCB_t * const pxTCB = ( TCB_t * ) xTaskToResume;
|
|
|
+ UBaseType_t uxSavedInterruptStatus;
|
|
|
+
|
|
|
+ configASSERT( xTaskToResume );
|
|
|
+
|
|
|
+ /* RTOS ports that support interrupt nesting have the concept of a
|
|
|
+ maximum system call (or maximum API call) interrupt priority.
|
|
|
+ Interrupts that are above the maximum system call priority are keep
|
|
|
+ permanently enabled, even when the RTOS kernel is in a critical section,
|
|
|
+ but cannot make any calls to FreeRTOS API functions. If configASSERT()
|
|
|
+ is defined in FreeRTOSConfig.h then
|
|
|
+ portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion
|
|
|
+ failure if a FreeRTOS API function is called from an interrupt that has
|
|
|
+ been assigned a priority above the configured maximum system call
|
|
|
+ priority. Only FreeRTOS functions that end in FromISR can be called
|
|
|
+ from interrupts that have been assigned a priority at or (logically)
|
|
|
+ below the maximum system call interrupt priority. FreeRTOS maintains a
|
|
|
+ separate interrupt safe API to ensure interrupt entry is as fast and as
|
|
|
+ simple as possible. More information (albeit Cortex-M specific) is
|
|
|
+ provided on the following link:
|
|
|
+ http://www.freertos.org/RTOS-Cortex-M3-M4.html */
|
|
|
+ portASSERT_IF_INTERRUPT_PRIORITY_INVALID();
|
|
|
+
|
|
|
+ uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
|
|
|
+ {
|
|
|
+ if( prvTaskIsTaskSuspended( pxTCB ) == pdTRUE )
|
|
|
+ {
|
|
|
+ traceTASK_RESUME_FROM_ISR( pxTCB );
|
|
|
+
|
|
|
+ /* Check the ready lists can be accessed. */
|
|
|
+ if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
+ {
|
|
|
+ /* Ready lists can be accessed so move the task from the
|
|
|
+ suspended list to the ready list directly. */
|
|
|
+ if( pxTCB->uxPriority >= pxCurrentTCB->uxPriority )
|
|
|
+ {
|
|
|
+ xYieldRequired = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
+ prvAddTaskToReadyList( pxTCB );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The delayed or ready lists cannot be accessed so the task
|
|
|
+ is held in the pending ready list until the scheduler is
|
|
|
+ unsuspended. */
|
|
|
+ vListInsertEnd( &( xPendingReadyList ), &( pxTCB->xEventListItem ) );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
|
|
|
+
|
|
|
+ return xYieldRequired;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* ( ( INCLUDE_xTaskResumeFromISR == 1 ) && ( INCLUDE_vTaskSuspend == 1 ) ) */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+void vTaskStartScheduler( void )
|
|
|
+{
|
|
|
+BaseType_t xReturn;
|
|
|
+
|
|
|
+ /* Add the idle task at the lowest priority. */
|
|
|
+ #if ( INCLUDE_xTaskGetIdleTaskHandle == 1 )
|
|
|
+ {
|
|
|
+ /* Create the idle task, storing its handle in xIdleTaskHandle so it can
|
|
|
+ be returned by the xTaskGetIdleTaskHandle() function. */
|
|
|
+ xReturn = xTaskCreate( prvIdleTask, "IDLE", tskIDLE_STACK_SIZE, ( void * ) NULL, ( tskIDLE_PRIORITY | portPRIVILEGE_BIT ), &xIdleTaskHandle ); /*lint !e961 MISRA exception, justified as it is not a redundant explicit cast to all supported compilers. */
|
|
|
+ }
|
|
|
+ #else
|
|
|
+ {
|
|
|
+ /* Create the idle task without storing its handle. */
|
|
|
+ xReturn = xTaskCreate( prvIdleTask, "IDLE", tskIDLE_STACK_SIZE, ( void * ) NULL, ( tskIDLE_PRIORITY | portPRIVILEGE_BIT ), NULL ); /*lint !e961 MISRA exception, justified as it is not a redundant explicit cast to all supported compilers. */
|
|
|
+ }
|
|
|
+ #endif /* INCLUDE_xTaskGetIdleTaskHandle */
|
|
|
+
|
|
|
+ #if ( configUSE_TIMERS == 1 )
|
|
|
+ {
|
|
|
+ if( xReturn == pdPASS )
|
|
|
+ {
|
|
|
+ xReturn = xTimerCreateTimerTask();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif /* configUSE_TIMERS */
|
|
|
+
|
|
|
+ if( xReturn == pdPASS )
|
|
|
+ {
|
|
|
+ /* Interrupts are turned off here, to ensure a tick does not occur
|
|
|
+ before or during the call to xPortStartScheduler(). The stacks of
|
|
|
+ the created tasks contain a status word with interrupts switched on
|
|
|
+ so interrupts will automatically get re-enabled when the first task
|
|
|
+ starts to run. */
|
|
|
+ portDISABLE_INTERRUPTS();
|
|
|
+
|
|
|
+ #if ( configUSE_NEWLIB_REENTRANT == 1 )
|
|
|
+ {
|
|
|
+ /* Switch Newlib's _impure_ptr variable to point to the _reent
|
|
|
+ structure specific to the task that will run first. */
|
|
|
+ _impure_ptr = &( pxCurrentTCB->xNewLib_reent );
|
|
|
+ }
|
|
|
+ #endif /* configUSE_NEWLIB_REENTRANT */
|
|
|
+
|
|
|
+ xSchedulerRunning = pdTRUE;
|
|
|
+ xTickCount = ( TickType_t ) 0U;
|
|
|
+
|
|
|
+ /* If configGENERATE_RUN_TIME_STATS is defined then the following
|
|
|
+ macro must be defined to configure the timer/counter used to generate
|
|
|
+ the run time counter time base. */
|
|
|
+ portCONFIGURE_TIMER_FOR_RUN_TIME_STATS();
|
|
|
+
|
|
|
+ /* Setting up the timer tick is hardware specific and thus in the
|
|
|
+ portable interface. */
|
|
|
+ if( xPortStartScheduler() != pdFALSE )
|
|
|
+ {
|
|
|
+ /* Should not reach here as if the scheduler is running the
|
|
|
+ function will not return. */
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* Should only reach here if a task calls xTaskEndScheduler(). */
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* This line will only be reached if the kernel could not be started,
|
|
|
+ because there was not enough FreeRTOS heap to create the idle task
|
|
|
+ or the timer task. */
|
|
|
+ configASSERT( xReturn );
|
|
|
+ }
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+void vTaskEndScheduler( void )
|
|
|
+{
|
|
|
+ /* Stop the scheduler interrupts and call the portable scheduler end
|
|
|
+ routine so the original ISRs can be restored if necessary. The port
|
|
|
+ layer must ensure interrupts enable bit is left in the correct state. */
|
|
|
+ portDISABLE_INTERRUPTS();
|
|
|
+ xSchedulerRunning = pdFALSE;
|
|
|
+ vPortEndScheduler();
|
|
|
+}
|
|
|
+/*----------------------------------------------------------*/
|
|
|
+
|
|
|
+void vTaskSuspendAll( void )
|
|
|
+{
|
|
|
+ /* A critical section is not required as the variable is of type
|
|
|
+ BaseType_t. Please read Richard Barry's reply in the following link to a
|
|
|
+ post in the FreeRTOS support forum before reporting this as a bug! -
|
|
|
+ http://goo.gl/wu4acr */
|
|
|
+ ++uxSchedulerSuspended;
|
|
|
+}
|
|
|
+/*----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( configUSE_TICKLESS_IDLE != 0 )
|
|
|
+
|
|
|
+ static TickType_t prvGetExpectedIdleTime( void )
|
|
|
+ {
|
|
|
+ TickType_t xReturn;
|
|
|
+
|
|
|
+ if( pxCurrentTCB->uxPriority > tskIDLE_PRIORITY )
|
|
|
+ {
|
|
|
+ xReturn = 0;
|
|
|
+ }
|
|
|
+ else if( listCURRENT_LIST_LENGTH( &( pxReadyTasksLists[ tskIDLE_PRIORITY ] ) ) > 1 )
|
|
|
+ {
|
|
|
+ /* There are other idle priority tasks in the ready state. If
|
|
|
+ time slicing is used then the very next tick interrupt must be
|
|
|
+ processed. */
|
|
|
+ xReturn = 0;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ xReturn = xNextTaskUnblockTime - xTickCount;
|
|
|
+ }
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_TICKLESS_IDLE */
|
|
|
+/*----------------------------------------------------------*/
|
|
|
+
|
|
|
+BaseType_t xTaskResumeAll( void )
|
|
|
+{
|
|
|
+TCB_t *pxTCB;
|
|
|
+BaseType_t xAlreadyYielded = pdFALSE;
|
|
|
+
|
|
|
+ /* If uxSchedulerSuspended is zero then this function does not match a
|
|
|
+ previous call to vTaskSuspendAll(). */
|
|
|
+ configASSERT( uxSchedulerSuspended );
|
|
|
+
|
|
|
+ /* It is possible that an ISR caused a task to be removed from an event
|
|
|
+ list while the scheduler was suspended. If this was the case then the
|
|
|
+ removed task will have been added to the xPendingReadyList. Once the
|
|
|
+ scheduler has been resumed it is safe to move all the pending ready
|
|
|
+ tasks from this list into their appropriate ready list. */
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ --uxSchedulerSuspended;
|
|
|
+
|
|
|
+ if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
+ {
|
|
|
+ if( uxCurrentNumberOfTasks > ( UBaseType_t ) 0U )
|
|
|
+ {
|
|
|
+ /* Move any readied tasks from the pending list into the
|
|
|
+ appropriate ready list. */
|
|
|
+ while( listLIST_IS_EMPTY( &xPendingReadyList ) == pdFALSE )
|
|
|
+ {
|
|
|
+ pxTCB = ( TCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( ( &xPendingReadyList ) );
|
|
|
+ ( void ) uxListRemove( &( pxTCB->xEventListItem ) );
|
|
|
+ ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
+ prvAddTaskToReadyList( pxTCB );
|
|
|
+
|
|
|
+ /* If the moved task has a priority higher than the current
|
|
|
+ task then a yield must be performed. */
|
|
|
+ if( pxTCB->uxPriority >= pxCurrentTCB->uxPriority )
|
|
|
+ {
|
|
|
+ xYieldPending = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* If any ticks occurred while the scheduler was suspended then
|
|
|
+ they should be processed now. This ensures the tick count does
|
|
|
+ not slip, and that any delayed tasks are resumed at the correct
|
|
|
+ time. */
|
|
|
+ if( uxPendedTicks > ( UBaseType_t ) 0U )
|
|
|
+ {
|
|
|
+ while( uxPendedTicks > ( UBaseType_t ) 0U )
|
|
|
+ {
|
|
|
+ if( xTaskIncrementTick() != pdFALSE )
|
|
|
+ {
|
|
|
+ xYieldPending = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ --uxPendedTicks;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ if( xYieldPending == pdTRUE )
|
|
|
+ {
|
|
|
+ #if( configUSE_PREEMPTION != 0 )
|
|
|
+ {
|
|
|
+ xAlreadyYielded = pdTRUE;
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+ taskYIELD_IF_USING_PREEMPTION();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ return xAlreadyYielded;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+TickType_t xTaskGetTickCount( void )
|
|
|
+{
|
|
|
+TickType_t xTicks;
|
|
|
+
|
|
|
+ /* Critical section required if running on a 16 bit processor. */
|
|
|
+ portTICK_TYPE_ENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ xTicks = xTickCount;
|
|
|
+ }
|
|
|
+ portTICK_TYPE_EXIT_CRITICAL();
|
|
|
+
|
|
|
+ return xTicks;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+TickType_t xTaskGetTickCountFromISR( void )
|
|
|
+{
|
|
|
+TickType_t xReturn;
|
|
|
+UBaseType_t uxSavedInterruptStatus;
|
|
|
+
|
|
|
+ /* RTOS ports that support interrupt nesting have the concept of a maximum
|
|
|
+ system call (or maximum API call) interrupt priority. Interrupts that are
|
|
|
+ above the maximum system call priority are kept permanently enabled, even
|
|
|
+ when the RTOS kernel is in a critical section, but cannot make any calls to
|
|
|
+ FreeRTOS API functions. If configASSERT() is defined in FreeRTOSConfig.h
|
|
|
+ then portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion
|
|
|
+ failure if a FreeRTOS API function is called from an interrupt that has been
|
|
|
+ assigned a priority above the configured maximum system call priority.
|
|
|
+ Only FreeRTOS functions that end in FromISR can be called from interrupts
|
|
|
+ that have been assigned a priority at or (logically) below the maximum
|
|
|
+ system call interrupt priority. FreeRTOS maintains a separate interrupt
|
|
|
+ safe API to ensure interrupt entry is as fast and as simple as possible.
|
|
|
+ More information (albeit Cortex-M specific) is provided on the following
|
|
|
+ link: http://www.freertos.org/RTOS-Cortex-M3-M4.html */
|
|
|
+ portASSERT_IF_INTERRUPT_PRIORITY_INVALID();
|
|
|
+
|
|
|
+ uxSavedInterruptStatus = portTICK_TYPE_SET_INTERRUPT_MASK_FROM_ISR();
|
|
|
+ {
|
|
|
+ xReturn = xTickCount;
|
|
|
+ }
|
|
|
+ portTICK_TYPE_CLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+UBaseType_t uxTaskGetNumberOfTasks( void )
|
|
|
+{
|
|
|
+ /* A critical section is not required because the variables are of type
|
|
|
+ BaseType_t. */
|
|
|
+ return uxCurrentNumberOfTasks;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_pcTaskGetTaskName == 1 )
|
|
|
+
|
|
|
+ char *pcTaskGetTaskName( TaskHandle_t xTaskToQuery ) /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
|
|
|
+ {
|
|
|
+ TCB_t *pxTCB;
|
|
|
+
|
|
|
+ /* If null is passed in here then the name of the calling task is being queried. */
|
|
|
+ pxTCB = prvGetTCBFromHandle( xTaskToQuery );
|
|
|
+ configASSERT( pxTCB );
|
|
|
+ return &( pxTCB->pcTaskName[ 0 ] );
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* INCLUDE_pcTaskGetTaskName */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
+
|
|
|
+ UBaseType_t uxTaskGetSystemState( TaskStatus_t * const pxTaskStatusArray, const UBaseType_t uxArraySize, uint32_t * const pulTotalRunTime )
|
|
|
+ {
|
|
|
+ UBaseType_t uxTask = 0, uxQueue = configMAX_PRIORITIES;
|
|
|
+
|
|
|
+ vTaskSuspendAll();
|
|
|
+ {
|
|
|
+ /* Is there a space in the array for each task in the system? */
|
|
|
+ if( uxArraySize >= uxCurrentNumberOfTasks )
|
|
|
+ {
|
|
|
+ /* Fill in an TaskStatus_t structure with information on each
|
|
|
+ task in the Ready state. */
|
|
|
+ do
|
|
|
+ {
|
|
|
+ uxQueue--;
|
|
|
+ uxTask += prvListTaskWithinSingleList( &( pxTaskStatusArray[ uxTask ] ), &( pxReadyTasksLists[ uxQueue ] ), eReady );
|
|
|
+
|
|
|
+ } while( uxQueue > ( UBaseType_t ) tskIDLE_PRIORITY ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
+
|
|
|
+ /* Fill in an TaskStatus_t structure with information on each
|
|
|
+ task in the Blocked state. */
|
|
|
+ uxTask += prvListTaskWithinSingleList( &( pxTaskStatusArray[ uxTask ] ), ( List_t * ) pxDelayedTaskList, eBlocked );
|
|
|
+ uxTask += prvListTaskWithinSingleList( &( pxTaskStatusArray[ uxTask ] ), ( List_t * ) pxOverflowDelayedTaskList, eBlocked );
|
|
|
+
|
|
|
+ #if( INCLUDE_vTaskDelete == 1 )
|
|
|
+ {
|
|
|
+ /* Fill in an TaskStatus_t structure with information on
|
|
|
+ each task that has been deleted but not yet cleaned up. */
|
|
|
+ uxTask += prvListTaskWithinSingleList( &( pxTaskStatusArray[ uxTask ] ), &xTasksWaitingTermination, eDeleted );
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+ {
|
|
|
+ /* Fill in an TaskStatus_t structure with information on
|
|
|
+ each task in the Suspended state. */
|
|
|
+ uxTask += prvListTaskWithinSingleList( &( pxTaskStatusArray[ uxTask ] ), &xSuspendedTaskList, eSuspended );
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( configGENERATE_RUN_TIME_STATS == 1)
|
|
|
+ {
|
|
|
+ if( pulTotalRunTime != NULL )
|
|
|
+ {
|
|
|
+ #ifdef portALT_GET_RUN_TIME_COUNTER_VALUE
|
|
|
+ portALT_GET_RUN_TIME_COUNTER_VALUE( ( *pulTotalRunTime ) );
|
|
|
+ #else
|
|
|
+ *pulTotalRunTime = portGET_RUN_TIME_COUNTER_VALUE();
|
|
|
+ #endif
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #else
|
|
|
+ {
|
|
|
+ if( pulTotalRunTime != NULL )
|
|
|
+ {
|
|
|
+ *pulTotalRunTime = 0;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ ( void ) xTaskResumeAll();
|
|
|
+
|
|
|
+ return uxTask;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_TRACE_FACILITY */
|
|
|
+/*----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_xTaskGetIdleTaskHandle == 1 )
|
|
|
+
|
|
|
+ TaskHandle_t xTaskGetIdleTaskHandle( void )
|
|
|
+ {
|
|
|
+ /* If xTaskGetIdleTaskHandle() is called before the scheduler has been
|
|
|
+ started, then xIdleTaskHandle will be NULL. */
|
|
|
+ configASSERT( ( xIdleTaskHandle != NULL ) );
|
|
|
+ return xIdleTaskHandle;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* INCLUDE_xTaskGetIdleTaskHandle */
|
|
|
+/*----------------------------------------------------------*/
|
|
|
+
|
|
|
+/* This conditional compilation should use inequality to 0, not equality to 1.
|
|
|
+This is to ensure vTaskStepTick() is available when user defined low power mode
|
|
|
+implementations require configUSE_TICKLESS_IDLE to be set to a value other than
|
|
|
+1. */
|
|
|
+#if ( configUSE_TICKLESS_IDLE != 0 )
|
|
|
+
|
|
|
+ void vTaskStepTick( const TickType_t xTicksToJump )
|
|
|
+ {
|
|
|
+ /* Correct the tick count value after a period during which the tick
|
|
|
+ was suppressed. Note this does *not* call the tick hook function for
|
|
|
+ each stepped tick. */
|
|
|
+ configASSERT( ( xTickCount + xTicksToJump ) <= xNextTaskUnblockTime );
|
|
|
+ xTickCount += xTicksToJump;
|
|
|
+ traceINCREASE_TICK_COUNT( xTicksToJump );
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_TICKLESS_IDLE */
|
|
|
+/*----------------------------------------------------------*/
|
|
|
+
|
|
|
+BaseType_t xTaskIncrementTick( void )
|
|
|
+{
|
|
|
+TCB_t * pxTCB;
|
|
|
+TickType_t xItemValue;
|
|
|
+BaseType_t xSwitchRequired = pdFALSE;
|
|
|
+
|
|
|
+ /* Called by the portable layer each time a tick interrupt occurs.
|
|
|
+ Increments the tick then checks to see if the new tick value will cause any
|
|
|
+ tasks to be unblocked. */
|
|
|
+ traceTASK_INCREMENT_TICK( xTickCount );
|
|
|
+ if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
+ {
|
|
|
+ /* Increment the RTOS tick, switching the delayed and overflowed
|
|
|
+ delayed lists if it wraps to 0. */
|
|
|
+ ++xTickCount;
|
|
|
+
|
|
|
+ {
|
|
|
+ /* Minor optimisation. The tick count cannot change in this
|
|
|
+ block. */
|
|
|
+ const TickType_t xConstTickCount = xTickCount;
|
|
|
+
|
|
|
+ if( xConstTickCount == ( TickType_t ) 0U )
|
|
|
+ {
|
|
|
+ taskSWITCH_DELAYED_LISTS();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* See if this tick has made a timeout expire. Tasks are stored in
|
|
|
+ the queue in the order of their wake time - meaning once one task
|
|
|
+ has been found whose block time has not expired there is no need to
|
|
|
+ look any further down the list. */
|
|
|
+ if( xConstTickCount >= xNextTaskUnblockTime )
|
|
|
+ {
|
|
|
+ for( ;; )
|
|
|
+ {
|
|
|
+ if( listLIST_IS_EMPTY( pxDelayedTaskList ) != pdFALSE )
|
|
|
+ {
|
|
|
+ /* The delayed list is empty. Set xNextTaskUnblockTime
|
|
|
+ to the maximum possible value so it is extremely
|
|
|
+ unlikely that the
|
|
|
+ if( xTickCount >= xNextTaskUnblockTime ) test will pass
|
|
|
+ next time through. */
|
|
|
+ xNextTaskUnblockTime = portMAX_DELAY;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The delayed list is not empty, get the value of the
|
|
|
+ item at the head of the delayed list. This is the time
|
|
|
+ at which the task at the head of the delayed list must
|
|
|
+ be removed from the Blocked state. */
|
|
|
+ pxTCB = ( TCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( pxDelayedTaskList );
|
|
|
+ xItemValue = listGET_LIST_ITEM_VALUE( &( pxTCB->xGenericListItem ) );
|
|
|
+
|
|
|
+ if( xConstTickCount < xItemValue )
|
|
|
+ {
|
|
|
+ /* It is not time to unblock this item yet, but the
|
|
|
+ item value is the time at which the task at the head
|
|
|
+ of the blocked list must be removed from the Blocked
|
|
|
+ state - so record the item value in
|
|
|
+ xNextTaskUnblockTime. */
|
|
|
+ xNextTaskUnblockTime = xItemValue;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* It is time to remove the item from the Blocked state. */
|
|
|
+ ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
+
|
|
|
+ /* Is the task waiting on an event also? If so remove
|
|
|
+ it from the event list. */
|
|
|
+ if( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) != NULL )
|
|
|
+ {
|
|
|
+ ( void ) uxListRemove( &( pxTCB->xEventListItem ) );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Place the unblocked task into the appropriate ready
|
|
|
+ list. */
|
|
|
+ prvAddTaskToReadyList( pxTCB );
|
|
|
+
|
|
|
+ /* A task being unblocked cannot cause an immediate
|
|
|
+ context switch if preemption is turned off. */
|
|
|
+ #if ( configUSE_PREEMPTION == 1 )
|
|
|
+ {
|
|
|
+ /* Preemption is on, but a context switch should
|
|
|
+ only be performed if the unblocked task has a
|
|
|
+ priority that is equal to or higher than the
|
|
|
+ currently executing task. */
|
|
|
+ if( pxTCB->uxPriority >= pxCurrentTCB->uxPriority )
|
|
|
+ {
|
|
|
+ xSwitchRequired = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif /* configUSE_PREEMPTION */
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Tasks of equal priority to the currently running task will share
|
|
|
+ processing time (time slice) if preemption is on, and the application
|
|
|
+ writer has not explicitly turned time slicing off. */
|
|
|
+ #if ( ( configUSE_PREEMPTION == 1 ) && ( configUSE_TIME_SLICING == 1 ) )
|
|
|
+ {
|
|
|
+ if( listCURRENT_LIST_LENGTH( &( pxReadyTasksLists[ pxCurrentTCB->uxPriority ] ) ) > ( UBaseType_t ) 1 )
|
|
|
+ {
|
|
|
+ xSwitchRequired = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif /* ( ( configUSE_PREEMPTION == 1 ) && ( configUSE_TIME_SLICING == 1 ) ) */
|
|
|
+
|
|
|
+ #if ( configUSE_TICK_HOOK == 1 )
|
|
|
+ {
|
|
|
+ /* Guard against the tick hook being called when the pended tick
|
|
|
+ count is being unwound (when the scheduler is being unlocked). */
|
|
|
+ if( uxPendedTicks == ( UBaseType_t ) 0U )
|
|
|
+ {
|
|
|
+ vApplicationTickHook();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif /* configUSE_TICK_HOOK */
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ ++uxPendedTicks;
|
|
|
+
|
|
|
+ /* The tick hook gets called at regular intervals, even if the
|
|
|
+ scheduler is locked. */
|
|
|
+ #if ( configUSE_TICK_HOOK == 1 )
|
|
|
+ {
|
|
|
+ vApplicationTickHook();
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+ }
|
|
|
+
|
|
|
+ #if ( configUSE_PREEMPTION == 1 )
|
|
|
+ {
|
|
|
+ if( xYieldPending != pdFALSE )
|
|
|
+ {
|
|
|
+ xSwitchRequired = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif /* configUSE_PREEMPTION */
|
|
|
+
|
|
|
+ return xSwitchRequired;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( configUSE_APPLICATION_TASK_TAG == 1 )
|
|
|
+
|
|
|
+ void vTaskSetApplicationTaskTag( TaskHandle_t xTask, TaskHookFunction_t pxHookFunction )
|
|
|
+ {
|
|
|
+ TCB_t *xTCB;
|
|
|
+
|
|
|
+ /* If xTask is NULL then it is the task hook of the calling task that is
|
|
|
+ getting set. */
|
|
|
+ if( xTask == NULL )
|
|
|
+ {
|
|
|
+ xTCB = ( TCB_t * ) pxCurrentTCB;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ xTCB = ( TCB_t * ) xTask;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Save the hook function in the TCB. A critical section is required as
|
|
|
+ the value can be accessed from an interrupt. */
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ xTCB->pxTaskTag = pxHookFunction;
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_APPLICATION_TASK_TAG */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( configUSE_APPLICATION_TASK_TAG == 1 )
|
|
|
+
|
|
|
+ TaskHookFunction_t xTaskGetApplicationTaskTag( TaskHandle_t xTask )
|
|
|
+ {
|
|
|
+ TCB_t *xTCB;
|
|
|
+ TaskHookFunction_t xReturn;
|
|
|
+
|
|
|
+ /* If xTask is NULL then we are setting our own task hook. */
|
|
|
+ if( xTask == NULL )
|
|
|
+ {
|
|
|
+ xTCB = ( TCB_t * ) pxCurrentTCB;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ xTCB = ( TCB_t * ) xTask;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Save the hook function in the TCB. A critical section is required as
|
|
|
+ the value can be accessed from an interrupt. */
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ xReturn = xTCB->pxTaskTag;
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_APPLICATION_TASK_TAG */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( configUSE_APPLICATION_TASK_TAG == 1 )
|
|
|
+
|
|
|
+ BaseType_t xTaskCallApplicationTaskHook( TaskHandle_t xTask, void *pvParameter )
|
|
|
+ {
|
|
|
+ TCB_t *xTCB;
|
|
|
+ BaseType_t xReturn;
|
|
|
+
|
|
|
+ /* If xTask is NULL then we are calling our own task hook. */
|
|
|
+ if( xTask == NULL )
|
|
|
+ {
|
|
|
+ xTCB = ( TCB_t * ) pxCurrentTCB;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ xTCB = ( TCB_t * ) xTask;
|
|
|
+ }
|
|
|
+
|
|
|
+ if( xTCB->pxTaskTag != NULL )
|
|
|
+ {
|
|
|
+ xReturn = xTCB->pxTaskTag( pvParameter );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ xReturn = pdFAIL;
|
|
|
+ }
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_APPLICATION_TASK_TAG */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+void vTaskSwitchContext( void )
|
|
|
+{
|
|
|
+ if( uxSchedulerSuspended != ( UBaseType_t ) pdFALSE )
|
|
|
+ {
|
|
|
+ /* The scheduler is currently suspended - do not allow a context
|
|
|
+ switch. */
|
|
|
+ xYieldPending = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ xYieldPending = pdFALSE;
|
|
|
+ traceTASK_SWITCHED_OUT();
|
|
|
+
|
|
|
+ #if ( configGENERATE_RUN_TIME_STATS == 1 )
|
|
|
+ {
|
|
|
+ #ifdef portALT_GET_RUN_TIME_COUNTER_VALUE
|
|
|
+ portALT_GET_RUN_TIME_COUNTER_VALUE( ulTotalRunTime );
|
|
|
+ #else
|
|
|
+ ulTotalRunTime = portGET_RUN_TIME_COUNTER_VALUE();
|
|
|
+ #endif
|
|
|
+
|
|
|
+ /* Add the amount of time the task has been running to the
|
|
|
+ accumulated time so far. The time the task started running was
|
|
|
+ stored in ulTaskSwitchedInTime. Note that there is no overflow
|
|
|
+ protection here so count values are only valid until the timer
|
|
|
+ overflows. The guard against negative values is to protect
|
|
|
+ against suspect run time stat counter implementations - which
|
|
|
+ are provided by the application, not the kernel. */
|
|
|
+ if( ulTotalRunTime > ulTaskSwitchedInTime )
|
|
|
+ {
|
|
|
+ pxCurrentTCB->ulRunTimeCounter += ( ulTotalRunTime - ulTaskSwitchedInTime );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ ulTaskSwitchedInTime = ulTotalRunTime;
|
|
|
+ }
|
|
|
+ #endif /* configGENERATE_RUN_TIME_STATS */
|
|
|
+
|
|
|
+ /* Check for stack overflow, if configured. */
|
|
|
+ taskFIRST_CHECK_FOR_STACK_OVERFLOW();
|
|
|
+ taskSECOND_CHECK_FOR_STACK_OVERFLOW();
|
|
|
+
|
|
|
+ /* Select a new task to run using either the generic C or port
|
|
|
+ optimised asm code. */
|
|
|
+ taskSELECT_HIGHEST_PRIORITY_TASK();
|
|
|
+ traceTASK_SWITCHED_IN();
|
|
|
+
|
|
|
+ #if ( configUSE_NEWLIB_REENTRANT == 1 )
|
|
|
+ {
|
|
|
+ /* Switch Newlib's _impure_ptr variable to point to the _reent
|
|
|
+ structure specific to this task. */
|
|
|
+ _impure_ptr = &( pxCurrentTCB->xNewLib_reent );
|
|
|
+ }
|
|
|
+ #endif /* configUSE_NEWLIB_REENTRANT */
|
|
|
+ }
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+void vTaskPlaceOnEventList( List_t * const pxEventList, const TickType_t xTicksToWait )
|
|
|
+{
|
|
|
+TickType_t xTimeToWake;
|
|
|
+
|
|
|
+ configASSERT( pxEventList );
|
|
|
+
|
|
|
+ /* THIS FUNCTION MUST BE CALLED WITH EITHER INTERRUPTS DISABLED OR THE
|
|
|
+ SCHEDULER SUSPENDED AND THE QUEUE BEING ACCESSED LOCKED. */
|
|
|
+
|
|
|
+ /* Place the event list item of the TCB in the appropriate event list.
|
|
|
+ This is placed in the list in priority order so the highest priority task
|
|
|
+ is the first to be woken by the event. The queue that contains the event
|
|
|
+ list is locked, preventing simultaneous access from interrupts. */
|
|
|
+ vListInsert( pxEventList, &( pxCurrentTCB->xEventListItem ) );
|
|
|
+
|
|
|
+ /* The task must be removed from from the ready list before it is added to
|
|
|
+ the blocked list as the same list item is used for both lists. Exclusive
|
|
|
+ access to the ready lists guaranteed because the scheduler is locked. */
|
|
|
+ if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ /* The current task must be in a ready list, so there is no need to
|
|
|
+ check, and the port reset macro can be called directly. */
|
|
|
+ portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+ {
|
|
|
+ if( xTicksToWait == portMAX_DELAY )
|
|
|
+ {
|
|
|
+ /* Add the task to the suspended task list instead of a delayed task
|
|
|
+ list to ensure the task is not woken by a timing event. It will
|
|
|
+ block indefinitely. */
|
|
|
+ vListInsertEnd( &xSuspendedTaskList, &( pxCurrentTCB->xGenericListItem ) );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* Calculate the time at which the task should be woken if the event
|
|
|
+ does not occur. This may overflow but this doesn't matter, the
|
|
|
+ scheduler will handle it. */
|
|
|
+ xTimeToWake = xTickCount + xTicksToWait;
|
|
|
+ prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #else /* INCLUDE_vTaskSuspend */
|
|
|
+ {
|
|
|
+ /* Calculate the time at which the task should be woken if the event does
|
|
|
+ not occur. This may overflow but this doesn't matter, the scheduler
|
|
|
+ will handle it. */
|
|
|
+ xTimeToWake = xTickCount + xTicksToWait;
|
|
|
+ prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
+ }
|
|
|
+ #endif /* INCLUDE_vTaskSuspend */
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+void vTaskPlaceOnUnorderedEventList( List_t * pxEventList, const TickType_t xItemValue, const TickType_t xTicksToWait )
|
|
|
+{
|
|
|
+TickType_t xTimeToWake;
|
|
|
+
|
|
|
+ configASSERT( pxEventList );
|
|
|
+
|
|
|
+ /* THIS FUNCTION MUST BE CALLED WITH THE SCHEDULER SUSPENDED. It is used by
|
|
|
+ the event groups implementation. */
|
|
|
+ configASSERT( uxSchedulerSuspended != 0 );
|
|
|
+
|
|
|
+ /* Store the item value in the event list item. It is safe to access the
|
|
|
+ event list item here as interrupts won't access the event list item of a
|
|
|
+ task that is not in the Blocked state. */
|
|
|
+ listSET_LIST_ITEM_VALUE( &( pxCurrentTCB->xEventListItem ), xItemValue | taskEVENT_LIST_ITEM_VALUE_IN_USE );
|
|
|
+
|
|
|
+ /* Place the event list item of the TCB at the end of the appropriate event
|
|
|
+ list. It is safe to access the event list here because it is part of an
|
|
|
+ event group implementation - and interrupts don't access event groups
|
|
|
+ directly (instead they access them indirectly by pending function calls to
|
|
|
+ the task level). */
|
|
|
+ vListInsertEnd( pxEventList, &( pxCurrentTCB->xEventListItem ) );
|
|
|
+
|
|
|
+ /* The task must be removed from the ready list before it is added to the
|
|
|
+ blocked list. Exclusive access can be assured to the ready list as the
|
|
|
+ scheduler is locked. */
|
|
|
+ if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ /* The current task must be in a ready list, so there is no need to
|
|
|
+ check, and the port reset macro can be called directly. */
|
|
|
+ portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+ {
|
|
|
+ if( xTicksToWait == portMAX_DELAY )
|
|
|
+ {
|
|
|
+ /* Add the task to the suspended task list instead of a delayed task
|
|
|
+ list to ensure it is not woken by a timing event. It will block
|
|
|
+ indefinitely. */
|
|
|
+ vListInsertEnd( &xSuspendedTaskList, &( pxCurrentTCB->xGenericListItem ) );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* Calculate the time at which the task should be woken if the event
|
|
|
+ does not occur. This may overflow but this doesn't matter, the
|
|
|
+ kernel will manage it correctly. */
|
|
|
+ xTimeToWake = xTickCount + xTicksToWait;
|
|
|
+ prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #else /* INCLUDE_vTaskSuspend */
|
|
|
+ {
|
|
|
+ /* Calculate the time at which the task should be woken if the event does
|
|
|
+ not occur. This may overflow but this doesn't matter, the kernel
|
|
|
+ will manage it correctly. */
|
|
|
+ xTimeToWake = xTickCount + xTicksToWait;
|
|
|
+ prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
+ }
|
|
|
+ #endif /* INCLUDE_vTaskSuspend */
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if configUSE_TIMERS == 1
|
|
|
+
|
|
|
+ void vTaskPlaceOnEventListRestricted( List_t * const pxEventList, const TickType_t xTicksToWait )
|
|
|
+ {
|
|
|
+ TickType_t xTimeToWake;
|
|
|
+
|
|
|
+ configASSERT( pxEventList );
|
|
|
+
|
|
|
+ /* This function should not be called by application code hence the
|
|
|
+ 'Restricted' in its name. It is not part of the public API. It is
|
|
|
+ designed for use by kernel code, and has special calling requirements -
|
|
|
+ it should be called from a critical section. */
|
|
|
+
|
|
|
+
|
|
|
+ /* Place the event list item of the TCB in the appropriate event list.
|
|
|
+ In this case it is assume that this is the only task that is going to
|
|
|
+ be waiting on this event list, so the faster vListInsertEnd() function
|
|
|
+ can be used in place of vListInsert. */
|
|
|
+ vListInsertEnd( pxEventList, &( pxCurrentTCB->xEventListItem ) );
|
|
|
+
|
|
|
+ /* We must remove this task from the ready list before adding it to the
|
|
|
+ blocked list as the same list item is used for both lists. This
|
|
|
+ function is called form a critical section. */
|
|
|
+ if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ /* The current task must be in a ready list, so there is no need to
|
|
|
+ check, and the port reset macro can be called directly. */
|
|
|
+ portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Calculate the time at which the task should be woken if the event does
|
|
|
+ not occur. This may overflow but this doesn't matter. */
|
|
|
+ xTimeToWake = xTickCount + xTicksToWait;
|
|
|
+
|
|
|
+ traceTASK_DELAY_UNTIL();
|
|
|
+ prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_TIMERS */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+BaseType_t xTaskRemoveFromEventList( const List_t * const pxEventList )
|
|
|
+{
|
|
|
+TCB_t *pxUnblockedTCB;
|
|
|
+BaseType_t xReturn;
|
|
|
+
|
|
|
+ /* THIS FUNCTION MUST BE CALLED FROM A CRITICAL SECTION. It can also be
|
|
|
+ called from a critical section within an ISR. */
|
|
|
+
|
|
|
+ /* The event list is sorted in priority order, so the first in the list can
|
|
|
+ be removed as it is known to be the highest priority. Remove the TCB from
|
|
|
+ the delayed list, and add it to the ready list.
|
|
|
+
|
|
|
+ If an event is for a queue that is locked then this function will never
|
|
|
+ get called - the lock count on the queue will get modified instead. This
|
|
|
+ means exclusive access to the event list is guaranteed here.
|
|
|
+
|
|
|
+ This function assumes that a check has already been made to ensure that
|
|
|
+ pxEventList is not empty. */
|
|
|
+ pxUnblockedTCB = ( TCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( pxEventList );
|
|
|
+ configASSERT( pxUnblockedTCB );
|
|
|
+ ( void ) uxListRemove( &( pxUnblockedTCB->xEventListItem ) );
|
|
|
+
|
|
|
+ if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
+ {
|
|
|
+ ( void ) uxListRemove( &( pxUnblockedTCB->xGenericListItem ) );
|
|
|
+ prvAddTaskToReadyList( pxUnblockedTCB );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The delayed and ready lists cannot be accessed, so hold this task
|
|
|
+ pending until the scheduler is resumed. */
|
|
|
+ vListInsertEnd( &( xPendingReadyList ), &( pxUnblockedTCB->xEventListItem ) );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( pxUnblockedTCB->uxPriority > pxCurrentTCB->uxPriority )
|
|
|
+ {
|
|
|
+ /* Return true if the task removed from the event list has a higher
|
|
|
+ priority than the calling task. This allows the calling task to know if
|
|
|
+ it should force a context switch now. */
|
|
|
+ xReturn = pdTRUE;
|
|
|
+
|
|
|
+ /* Mark that a yield is pending in case the user is not using the
|
|
|
+ "xHigherPriorityTaskWoken" parameter to an ISR safe FreeRTOS function. */
|
|
|
+ xYieldPending = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ xReturn = pdFALSE;
|
|
|
+ }
|
|
|
+
|
|
|
+ #if( configUSE_TICKLESS_IDLE == 1 )
|
|
|
+ {
|
|
|
+ /* If a task is blocked on a kernel object then xNextTaskUnblockTime
|
|
|
+ might be set to the blocked task's time out time. If the task is
|
|
|
+ unblocked for a reason other than a timeout xNextTaskUnblockTime is
|
|
|
+ normally left unchanged, because it is automatically get reset to a new
|
|
|
+ value when the tick count equals xNextTaskUnblockTime. However if
|
|
|
+ tickless idling is used it might be more important to enter sleep mode
|
|
|
+ at the earliest possible time - so reset xNextTaskUnblockTime here to
|
|
|
+ ensure it is updated at the earliest possible time. */
|
|
|
+ prvResetNextTaskUnblockTime();
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+BaseType_t xTaskRemoveFromUnorderedEventList( ListItem_t * pxEventListItem, const TickType_t xItemValue )
|
|
|
+{
|
|
|
+TCB_t *pxUnblockedTCB;
|
|
|
+BaseType_t xReturn;
|
|
|
+
|
|
|
+ /* THIS FUNCTION MUST BE CALLED WITH THE SCHEDULER SUSPENDED. It is used by
|
|
|
+ the event flags implementation. */
|
|
|
+ configASSERT( uxSchedulerSuspended != pdFALSE );
|
|
|
+
|
|
|
+ /* Store the new item value in the event list. */
|
|
|
+ listSET_LIST_ITEM_VALUE( pxEventListItem, xItemValue | taskEVENT_LIST_ITEM_VALUE_IN_USE );
|
|
|
+
|
|
|
+ /* Remove the event list form the event flag. Interrupts do not access
|
|
|
+ event flags. */
|
|
|
+ pxUnblockedTCB = ( TCB_t * ) listGET_LIST_ITEM_OWNER( pxEventListItem );
|
|
|
+ configASSERT( pxUnblockedTCB );
|
|
|
+ ( void ) uxListRemove( pxEventListItem );
|
|
|
+
|
|
|
+ /* Remove the task from the delayed list and add it to the ready list. The
|
|
|
+ scheduler is suspended so interrupts will not be accessing the ready
|
|
|
+ lists. */
|
|
|
+ ( void ) uxListRemove( &( pxUnblockedTCB->xGenericListItem ) );
|
|
|
+ prvAddTaskToReadyList( pxUnblockedTCB );
|
|
|
+
|
|
|
+ if( pxUnblockedTCB->uxPriority > pxCurrentTCB->uxPriority )
|
|
|
+ {
|
|
|
+ /* Return true if the task removed from the event list has
|
|
|
+ a higher priority than the calling task. This allows
|
|
|
+ the calling task to know if it should force a context
|
|
|
+ switch now. */
|
|
|
+ xReturn = pdTRUE;
|
|
|
+
|
|
|
+ /* Mark that a yield is pending in case the user is not using the
|
|
|
+ "xHigherPriorityTaskWoken" parameter to an ISR safe FreeRTOS function. */
|
|
|
+ xYieldPending = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ xReturn = pdFALSE;
|
|
|
+ }
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+void vTaskSetTimeOutState( TimeOut_t * const pxTimeOut )
|
|
|
+{
|
|
|
+ configASSERT( pxTimeOut );
|
|
|
+ pxTimeOut->xOverflowCount = xNumOfOverflows;
|
|
|
+ pxTimeOut->xTimeOnEntering = xTickCount;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+BaseType_t xTaskCheckForTimeOut( TimeOut_t * const pxTimeOut, TickType_t * const pxTicksToWait )
|
|
|
+{
|
|
|
+BaseType_t xReturn;
|
|
|
+
|
|
|
+ configASSERT( pxTimeOut );
|
|
|
+ configASSERT( pxTicksToWait );
|
|
|
+
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ /* Minor optimisation. The tick count cannot change in this block. */
|
|
|
+ const TickType_t xConstTickCount = xTickCount;
|
|
|
+
|
|
|
+ #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+ /* If INCLUDE_vTaskSuspend is set to 1 and the block time specified is
|
|
|
+ the maximum block time then the task should block indefinitely, and
|
|
|
+ therefore never time out. */
|
|
|
+ if( *pxTicksToWait == portMAX_DELAY )
|
|
|
+ {
|
|
|
+ xReturn = pdFALSE;
|
|
|
+ }
|
|
|
+ else /* We are not blocking indefinitely, perform the checks below. */
|
|
|
+ #endif
|
|
|
+
|
|
|
+ if( ( xNumOfOverflows != pxTimeOut->xOverflowCount ) && ( xConstTickCount >= pxTimeOut->xTimeOnEntering ) ) /*lint !e525 Indentation preferred as is to make code within pre-processor directives clearer. */
|
|
|
+ {
|
|
|
+ /* The tick count is greater than the time at which vTaskSetTimeout()
|
|
|
+ was called, but has also overflowed since vTaskSetTimeOut() was called.
|
|
|
+ It must have wrapped all the way around and gone past us again. This
|
|
|
+ passed since vTaskSetTimeout() was called. */
|
|
|
+ xReturn = pdTRUE;
|
|
|
+ }
|
|
|
+ else if( ( xConstTickCount - pxTimeOut->xTimeOnEntering ) < *pxTicksToWait )
|
|
|
+ {
|
|
|
+ /* Not a genuine timeout. Adjust parameters for time remaining. */
|
|
|
+ *pxTicksToWait -= ( xConstTickCount - pxTimeOut->xTimeOnEntering );
|
|
|
+ vTaskSetTimeOutState( pxTimeOut );
|
|
|
+ xReturn = pdFALSE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ xReturn = pdTRUE;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+void vTaskMissedYield( void )
|
|
|
+{
|
|
|
+ xYieldPending = pdTRUE;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
+
|
|
|
+ UBaseType_t uxTaskGetTaskNumber( TaskHandle_t xTask )
|
|
|
+ {
|
|
|
+ UBaseType_t uxReturn;
|
|
|
+ TCB_t *pxTCB;
|
|
|
+
|
|
|
+ if( xTask != NULL )
|
|
|
+ {
|
|
|
+ pxTCB = ( TCB_t * ) xTask;
|
|
|
+ uxReturn = pxTCB->uxTaskNumber;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ uxReturn = 0U;
|
|
|
+ }
|
|
|
+
|
|
|
+ return uxReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_TRACE_FACILITY */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
+
|
|
|
+ void vTaskSetTaskNumber( TaskHandle_t xTask, const UBaseType_t uxHandle )
|
|
|
+ {
|
|
|
+ TCB_t *pxTCB;
|
|
|
+
|
|
|
+ if( xTask != NULL )
|
|
|
+ {
|
|
|
+ pxTCB = ( TCB_t * ) xTask;
|
|
|
+ pxTCB->uxTaskNumber = uxHandle;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_TRACE_FACILITY */
|
|
|
+
|
|
|
+/*
|
|
|
+ * -----------------------------------------------------------
|
|
|
+ * The Idle task.
|
|
|
+ * ----------------------------------------------------------
|
|
|
+ *
|
|
|
+ * The portTASK_FUNCTION() macro is used to allow port/compiler specific
|
|
|
+ * language extensions. The equivalent prototype for this function is:
|
|
|
+ *
|
|
|
+ * void prvIdleTask( void *pvParameters );
|
|
|
+ *
|
|
|
+ */
|
|
|
+static portTASK_FUNCTION( prvIdleTask, pvParameters )
|
|
|
+{
|
|
|
+ /* Stop warnings. */
|
|
|
+ ( void ) pvParameters;
|
|
|
+
|
|
|
+ for( ;; )
|
|
|
+ {
|
|
|
+ /* See if any tasks have been deleted. */
|
|
|
+ prvCheckTasksWaitingTermination();
|
|
|
+
|
|
|
+ #if ( configUSE_PREEMPTION == 0 )
|
|
|
+ {
|
|
|
+ /* If we are not using preemption we keep forcing a task switch to
|
|
|
+ see if any other task has become available. If we are using
|
|
|
+ preemption we don't need to do this as any task becoming available
|
|
|
+ will automatically get the processor anyway. */
|
|
|
+ taskYIELD();
|
|
|
+ }
|
|
|
+ #endif /* configUSE_PREEMPTION */
|
|
|
+
|
|
|
+ #if ( ( configUSE_PREEMPTION == 1 ) && ( configIDLE_SHOULD_YIELD == 1 ) )
|
|
|
+ {
|
|
|
+ /* When using preemption tasks of equal priority will be
|
|
|
+ timesliced. If a task that is sharing the idle priority is ready
|
|
|
+ to run then the idle task should yield before the end of the
|
|
|
+ timeslice.
|
|
|
+
|
|
|
+ A critical region is not required here as we are just reading from
|
|
|
+ the list, and an occasional incorrect value will not matter. If
|
|
|
+ the ready list at the idle priority contains more than one task
|
|
|
+ then a task other than the idle task is ready to execute. */
|
|
|
+ if( listCURRENT_LIST_LENGTH( &( pxReadyTasksLists[ tskIDLE_PRIORITY ] ) ) > ( UBaseType_t ) 1 )
|
|
|
+ {
|
|
|
+ taskYIELD();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif /* ( ( configUSE_PREEMPTION == 1 ) && ( configIDLE_SHOULD_YIELD == 1 ) ) */
|
|
|
+
|
|
|
+ #if ( configUSE_IDLE_HOOK == 1 )
|
|
|
+ {
|
|
|
+ extern void vApplicationIdleHook( void );
|
|
|
+
|
|
|
+ /* Call the user defined function from within the idle task. This
|
|
|
+ allows the application designer to add background functionality
|
|
|
+ without the overhead of a separate task.
|
|
|
+ NOTE: vApplicationIdleHook() MUST NOT, UNDER ANY CIRCUMSTANCES,
|
|
|
+ CALL A FUNCTION THAT MIGHT BLOCK. */
|
|
|
+ vApplicationIdleHook();
|
|
|
+ }
|
|
|
+ #endif /* configUSE_IDLE_HOOK */
|
|
|
+
|
|
|
+ /* This conditional compilation should use inequality to 0, not equality
|
|
|
+ to 1. This is to ensure portSUPPRESS_TICKS_AND_SLEEP() is called when
|
|
|
+ user defined low power mode implementations require
|
|
|
+ configUSE_TICKLESS_IDLE to be set to a value other than 1. */
|
|
|
+ #if ( configUSE_TICKLESS_IDLE != 0 )
|
|
|
+ {
|
|
|
+ TickType_t xExpectedIdleTime;
|
|
|
+
|
|
|
+ /* It is not desirable to suspend then resume the scheduler on
|
|
|
+ each iteration of the idle task. Therefore, a preliminary
|
|
|
+ test of the expected idle time is performed without the
|
|
|
+ scheduler suspended. The result here is not necessarily
|
|
|
+ valid. */
|
|
|
+ xExpectedIdleTime = prvGetExpectedIdleTime();
|
|
|
+
|
|
|
+ if( xExpectedIdleTime >= configEXPECTED_IDLE_TIME_BEFORE_SLEEP )
|
|
|
+ {
|
|
|
+ vTaskSuspendAll();
|
|
|
+ {
|
|
|
+ /* Now the scheduler is suspended, the expected idle
|
|
|
+ time can be sampled again, and this time its value can
|
|
|
+ be used. */
|
|
|
+ configASSERT( xNextTaskUnblockTime >= xTickCount );
|
|
|
+ xExpectedIdleTime = prvGetExpectedIdleTime();
|
|
|
+
|
|
|
+ if( xExpectedIdleTime >= configEXPECTED_IDLE_TIME_BEFORE_SLEEP )
|
|
|
+ {
|
|
|
+ traceLOW_POWER_IDLE_BEGIN();
|
|
|
+ portSUPPRESS_TICKS_AND_SLEEP( xExpectedIdleTime );
|
|
|
+ traceLOW_POWER_IDLE_END();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ ( void ) xTaskResumeAll();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif /* configUSE_TICKLESS_IDLE */
|
|
|
+ }
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if configUSE_TICKLESS_IDLE != 0
|
|
|
+
|
|
|
+ eSleepModeStatus eTaskConfirmSleepModeStatus( void )
|
|
|
+ {
|
|
|
+ eSleepModeStatus eReturn = eStandardSleep;
|
|
|
+
|
|
|
+ if( listCURRENT_LIST_LENGTH( &xPendingReadyList ) != 0 )
|
|
|
+ {
|
|
|
+ /* A task was made ready while the scheduler was suspended. */
|
|
|
+ eReturn = eAbortSleep;
|
|
|
+ }
|
|
|
+ else if( xYieldPending != pdFALSE )
|
|
|
+ {
|
|
|
+ /* A yield was pended while the scheduler was suspended. */
|
|
|
+ eReturn = eAbortSleep;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ #if configUSE_TIMERS == 0
|
|
|
+ {
|
|
|
+ /* The idle task exists in addition to the application tasks. */
|
|
|
+ const UBaseType_t uxNonApplicationTasks = 1;
|
|
|
+
|
|
|
+ /* If timers are not being used and all the tasks are in the
|
|
|
+ suspended list (which might mean they have an infinite block
|
|
|
+ time rather than actually being suspended) then it is safe to
|
|
|
+ turn all clocks off and just wait for external interrupts. */
|
|
|
+ if( listCURRENT_LIST_LENGTH( &xSuspendedTaskList ) == ( uxCurrentNumberOfTasks - uxNonApplicationTasks ) )
|
|
|
+ {
|
|
|
+ eReturn = eNoTasksWaitingTimeout;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif /* configUSE_TIMERS */
|
|
|
+ }
|
|
|
+
|
|
|
+ return eReturn;
|
|
|
+ }
|
|
|
+#endif /* configUSE_TICKLESS_IDLE */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+static void prvInitialiseTCBVariables( TCB_t * const pxTCB, const char * const pcName, UBaseType_t uxPriority, const MemoryRegion_t * const xRegions, const uint16_t usStackDepth ) /*lint !e971 Unqualified char types are allowed for strings and single characters only. */
|
|
|
+{
|
|
|
+UBaseType_t x;
|
|
|
+
|
|
|
+ /* Store the task name in the TCB. */
|
|
|
+ for( x = ( UBaseType_t ) 0; x < ( UBaseType_t ) configMAX_TASK_NAME_LEN; x++ )
|
|
|
+ {
|
|
|
+ pxTCB->pcTaskName[ x ] = pcName[ x ];
|
|
|
+
|
|
|
+ /* Don't copy all configMAX_TASK_NAME_LEN if the string is shorter than
|
|
|
+ configMAX_TASK_NAME_LEN characters just in case the memory after the
|
|
|
+ string is not accessible (extremely unlikely). */
|
|
|
+ if( pcName[ x ] == 0x00 )
|
|
|
+ {
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Ensure the name string is terminated in the case that the string length
|
|
|
+ was greater or equal to configMAX_TASK_NAME_LEN. */
|
|
|
+ pxTCB->pcTaskName[ configMAX_TASK_NAME_LEN - 1 ] = '\0';
|
|
|
+
|
|
|
+ /* This is used as an array index so must ensure it's not too large. First
|
|
|
+ remove the privilege bit if one is present. */
|
|
|
+ if( uxPriority >= ( UBaseType_t ) configMAX_PRIORITIES )
|
|
|
+ {
|
|
|
+ uxPriority = ( UBaseType_t ) configMAX_PRIORITIES - ( UBaseType_t ) 1U;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ pxTCB->uxPriority = uxPriority;
|
|
|
+ #if ( configUSE_MUTEXES == 1 )
|
|
|
+ {
|
|
|
+ pxTCB->uxBasePriority = uxPriority;
|
|
|
+ pxTCB->uxMutexesHeld = 0;
|
|
|
+ }
|
|
|
+ #endif /* configUSE_MUTEXES */
|
|
|
+
|
|
|
+ vListInitialiseItem( &( pxTCB->xGenericListItem ) );
|
|
|
+ vListInitialiseItem( &( pxTCB->xEventListItem ) );
|
|
|
+
|
|
|
+ /* Set the pxTCB as a link back from the ListItem_t. This is so we can get
|
|
|
+ back to the containing TCB from a generic item in a list. */
|
|
|
+ listSET_LIST_ITEM_OWNER( &( pxTCB->xGenericListItem ), pxTCB );
|
|
|
+
|
|
|
+ /* Event lists are always in priority order. */
|
|
|
+ listSET_LIST_ITEM_VALUE( &( pxTCB->xEventListItem ), ( TickType_t ) configMAX_PRIORITIES - ( TickType_t ) uxPriority ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
+ listSET_LIST_ITEM_OWNER( &( pxTCB->xEventListItem ), pxTCB );
|
|
|
+
|
|
|
+ #if ( portCRITICAL_NESTING_IN_TCB == 1 )
|
|
|
+ {
|
|
|
+ pxTCB->uxCriticalNesting = ( UBaseType_t ) 0U;
|
|
|
+ }
|
|
|
+ #endif /* portCRITICAL_NESTING_IN_TCB */
|
|
|
+
|
|
|
+ #if ( configUSE_APPLICATION_TASK_TAG == 1 )
|
|
|
+ {
|
|
|
+ pxTCB->pxTaskTag = NULL;
|
|
|
+ }
|
|
|
+ #endif /* configUSE_APPLICATION_TASK_TAG */
|
|
|
+
|
|
|
+ #if ( configGENERATE_RUN_TIME_STATS == 1 )
|
|
|
+ {
|
|
|
+ pxTCB->ulRunTimeCounter = 0UL;
|
|
|
+ }
|
|
|
+ #endif /* configGENERATE_RUN_TIME_STATS */
|
|
|
+
|
|
|
+ #if ( portUSING_MPU_WRAPPERS == 1 )
|
|
|
+ {
|
|
|
+ vPortStoreTaskMPUSettings( &( pxTCB->xMPUSettings ), xRegions, pxTCB->pxStack, usStackDepth );
|
|
|
+ }
|
|
|
+ #else /* portUSING_MPU_WRAPPERS */
|
|
|
+ {
|
|
|
+ ( void ) xRegions;
|
|
|
+ ( void ) usStackDepth;
|
|
|
+ }
|
|
|
+ #endif /* portUSING_MPU_WRAPPERS */
|
|
|
+
|
|
|
+ #if ( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
+ {
|
|
|
+ pxTCB->ulNotifiedValue = 0;
|
|
|
+ pxTCB->eNotifyState = eNotWaitingNotification;
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( configUSE_NEWLIB_REENTRANT == 1 )
|
|
|
+ {
|
|
|
+ /* Initialise this task's Newlib reent structure. */
|
|
|
+ _REENT_INIT_PTR( ( &( pxTCB->xNewLib_reent ) ) );
|
|
|
+ }
|
|
|
+ #endif /* configUSE_NEWLIB_REENTRANT */
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( portUSING_MPU_WRAPPERS == 1 )
|
|
|
+
|
|
|
+ void vTaskAllocateMPURegions( TaskHandle_t xTaskToModify, const MemoryRegion_t * const xRegions )
|
|
|
+ {
|
|
|
+ TCB_t *pxTCB;
|
|
|
+
|
|
|
+ /* If null is passed in here then we are deleting ourselves. */
|
|
|
+ pxTCB = prvGetTCBFromHandle( xTaskToModify );
|
|
|
+
|
|
|
+ vPortStoreTaskMPUSettings( &( pxTCB->xMPUSettings ), xRegions, NULL, 0 );
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* portUSING_MPU_WRAPPERS */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+static void prvInitialiseTaskLists( void )
|
|
|
+{
|
|
|
+UBaseType_t uxPriority;
|
|
|
+
|
|
|
+ for( uxPriority = ( UBaseType_t ) 0U; uxPriority < ( UBaseType_t ) configMAX_PRIORITIES; uxPriority++ )
|
|
|
+ {
|
|
|
+ vListInitialise( &( pxReadyTasksLists[ uxPriority ] ) );
|
|
|
+ }
|
|
|
+
|
|
|
+ vListInitialise( &xDelayedTaskList1 );
|
|
|
+ vListInitialise( &xDelayedTaskList2 );
|
|
|
+ vListInitialise( &xPendingReadyList );
|
|
|
+
|
|
|
+ #if ( INCLUDE_vTaskDelete == 1 )
|
|
|
+ {
|
|
|
+ vListInitialise( &xTasksWaitingTermination );
|
|
|
+ }
|
|
|
+ #endif /* INCLUDE_vTaskDelete */
|
|
|
+
|
|
|
+ #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+ {
|
|
|
+ vListInitialise( &xSuspendedTaskList );
|
|
|
+ }
|
|
|
+ #endif /* INCLUDE_vTaskSuspend */
|
|
|
+
|
|
|
+ /* Start with pxDelayedTaskList using list1 and the pxOverflowDelayedTaskList
|
|
|
+ using list2. */
|
|
|
+ pxDelayedTaskList = &xDelayedTaskList1;
|
|
|
+ pxOverflowDelayedTaskList = &xDelayedTaskList2;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+static void prvCheckTasksWaitingTermination( void )
|
|
|
+{
|
|
|
+ #if ( INCLUDE_vTaskDelete == 1 )
|
|
|
+ {
|
|
|
+ BaseType_t xListIsEmpty;
|
|
|
+
|
|
|
+ /* ucTasksDeleted is used to prevent vTaskSuspendAll() being called
|
|
|
+ too often in the idle task. */
|
|
|
+ while( uxTasksDeleted > ( UBaseType_t ) 0U )
|
|
|
+ {
|
|
|
+ vTaskSuspendAll();
|
|
|
+ {
|
|
|
+ xListIsEmpty = listLIST_IS_EMPTY( &xTasksWaitingTermination );
|
|
|
+ }
|
|
|
+ ( void ) xTaskResumeAll();
|
|
|
+
|
|
|
+ if( xListIsEmpty == pdFALSE )
|
|
|
+ {
|
|
|
+ TCB_t *pxTCB;
|
|
|
+
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ pxTCB = ( TCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( ( &xTasksWaitingTermination ) );
|
|
|
+ ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
+ --uxCurrentNumberOfTasks;
|
|
|
+ --uxTasksDeleted;
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ prvDeleteTCB( pxTCB );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif /* vTaskDelete */
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+static void prvAddCurrentTaskToDelayedList( const TickType_t xTimeToWake )
|
|
|
+{
|
|
|
+ /* The list item will be inserted in wake time order. */
|
|
|
+ listSET_LIST_ITEM_VALUE( &( pxCurrentTCB->xGenericListItem ), xTimeToWake );
|
|
|
+
|
|
|
+ if( xTimeToWake < xTickCount )
|
|
|
+ {
|
|
|
+ /* Wake time has overflowed. Place this item in the overflow list. */
|
|
|
+ vListInsert( pxOverflowDelayedTaskList, &( pxCurrentTCB->xGenericListItem ) );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The wake time has not overflowed, so the current block list is used. */
|
|
|
+ vListInsert( pxDelayedTaskList, &( pxCurrentTCB->xGenericListItem ) );
|
|
|
+
|
|
|
+ /* If the task entering the blocked state was placed at the head of the
|
|
|
+ list of blocked tasks then xNextTaskUnblockTime needs to be updated
|
|
|
+ too. */
|
|
|
+ if( xTimeToWake < xNextTaskUnblockTime )
|
|
|
+ {
|
|
|
+ xNextTaskUnblockTime = xTimeToWake;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+static TCB_t *prvAllocateTCBAndStack( const uint16_t usStackDepth, StackType_t * const puxStackBuffer )
|
|
|
+{
|
|
|
+TCB_t *pxNewTCB;
|
|
|
+
|
|
|
+ /* If the stack grows down then allocate the stack then the TCB so the stack
|
|
|
+ does not grow into the TCB. Likewise if the stack grows up then allocate
|
|
|
+ the TCB then the stack. */
|
|
|
+ #if( portSTACK_GROWTH > 0 )
|
|
|
+ {
|
|
|
+ /* Allocate space for the TCB. Where the memory comes from depends on
|
|
|
+ the implementation of the port malloc function. */
|
|
|
+ pxNewTCB = ( TCB_t * ) pvPortMalloc( sizeof( TCB_t ) );
|
|
|
+
|
|
|
+ if( pxNewTCB != NULL )
|
|
|
+ {
|
|
|
+ /* Allocate space for the stack used by the task being created.
|
|
|
+ The base of the stack memory stored in the TCB so the task can
|
|
|
+ be deleted later if required. */
|
|
|
+ pxNewTCB->pxStack = ( StackType_t * ) pvPortMallocAligned( ( ( ( size_t ) usStackDepth ) * sizeof( StackType_t ) ), puxStackBuffer ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
+
|
|
|
+ if( pxNewTCB->pxStack == NULL )
|
|
|
+ {
|
|
|
+ /* Could not allocate the stack. Delete the allocated TCB. */
|
|
|
+ vPortFree( pxNewTCB );
|
|
|
+ pxNewTCB = NULL;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #else /* portSTACK_GROWTH */
|
|
|
+ {
|
|
|
+ StackType_t *pxStack;
|
|
|
+
|
|
|
+ /* Allocate space for the stack used by the task being created. */
|
|
|
+ pxStack = ( StackType_t * ) pvPortMallocAligned( ( ( ( size_t ) usStackDepth ) * sizeof( StackType_t ) ), puxStackBuffer ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
+
|
|
|
+ if( pxStack != NULL )
|
|
|
+ {
|
|
|
+ /* Allocate space for the TCB. Where the memory comes from depends
|
|
|
+ on the implementation of the port malloc function. */
|
|
|
+ pxNewTCB = ( TCB_t * ) pvPortMalloc( sizeof( TCB_t ) );
|
|
|
+
|
|
|
+ if( pxNewTCB != NULL )
|
|
|
+ {
|
|
|
+ /* Store the stack location in the TCB. */
|
|
|
+ pxNewTCB->pxStack = pxStack;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The stack cannot be used as the TCB was not created. Free it
|
|
|
+ again. */
|
|
|
+ vPortFree( pxStack );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ pxNewTCB = NULL;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif /* portSTACK_GROWTH */
|
|
|
+
|
|
|
+ if( pxNewTCB != NULL )
|
|
|
+ {
|
|
|
+ /* Avoid dependency on memset() if it is not required. */
|
|
|
+ #if( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) || ( configUSE_TRACE_FACILITY == 1 ) || ( INCLUDE_uxTaskGetStackHighWaterMark == 1 ) )
|
|
|
+ {
|
|
|
+ /* Just to help debugging. */
|
|
|
+ ( void ) memset( pxNewTCB->pxStack, ( int ) tskSTACK_FILL_BYTE, ( size_t ) usStackDepth * sizeof( StackType_t ) );
|
|
|
+ }
|
|
|
+ #endif /* ( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) || ( ( configUSE_TRACE_FACILITY == 1 ) || ( INCLUDE_uxTaskGetStackHighWaterMark == 1 ) ) ) */
|
|
|
+ }
|
|
|
+
|
|
|
+ return pxNewTCB;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( configUSE_TRACE_FACILITY == 1 )
|
|
|
+
|
|
|
+ static UBaseType_t prvListTaskWithinSingleList( TaskStatus_t *pxTaskStatusArray, List_t *pxList, eTaskState eState )
|
|
|
+ {
|
|
|
+ volatile TCB_t *pxNextTCB, *pxFirstTCB;
|
|
|
+ UBaseType_t uxTask = 0;
|
|
|
+
|
|
|
+ if( listCURRENT_LIST_LENGTH( pxList ) > ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ listGET_OWNER_OF_NEXT_ENTRY( pxFirstTCB, pxList );
|
|
|
+
|
|
|
+ /* Populate an TaskStatus_t structure within the
|
|
|
+ pxTaskStatusArray array for each task that is referenced from
|
|
|
+ pxList. See the definition of TaskStatus_t in task.h for the
|
|
|
+ meaning of each TaskStatus_t structure member. */
|
|
|
+ do
|
|
|
+ {
|
|
|
+ listGET_OWNER_OF_NEXT_ENTRY( pxNextTCB, pxList );
|
|
|
+
|
|
|
+ pxTaskStatusArray[ uxTask ].xHandle = ( TaskHandle_t ) pxNextTCB;
|
|
|
+ pxTaskStatusArray[ uxTask ].pcTaskName = ( const char * ) &( pxNextTCB->pcTaskName [ 0 ] );
|
|
|
+ pxTaskStatusArray[ uxTask ].xTaskNumber = pxNextTCB->uxTCBNumber;
|
|
|
+ pxTaskStatusArray[ uxTask ].eCurrentState = eState;
|
|
|
+ pxTaskStatusArray[ uxTask ].uxCurrentPriority = pxNextTCB->uxPriority;
|
|
|
+
|
|
|
+ #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+ {
|
|
|
+ /* If the task is in the suspended list then there is a chance
|
|
|
+ it is actually just blocked indefinitely - so really it should
|
|
|
+ be reported as being in the Blocked state. */
|
|
|
+ if( eState == eSuspended )
|
|
|
+ {
|
|
|
+ if( listLIST_ITEM_CONTAINER( &( pxNextTCB->xEventListItem ) ) != NULL )
|
|
|
+ {
|
|
|
+ pxTaskStatusArray[ uxTask ].eCurrentState = eBlocked;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #endif /* INCLUDE_vTaskSuspend */
|
|
|
+
|
|
|
+ #if ( configUSE_MUTEXES == 1 )
|
|
|
+ {
|
|
|
+ pxTaskStatusArray[ uxTask ].uxBasePriority = pxNextTCB->uxBasePriority;
|
|
|
+ }
|
|
|
+ #else
|
|
|
+ {
|
|
|
+ pxTaskStatusArray[ uxTask ].uxBasePriority = 0;
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( configGENERATE_RUN_TIME_STATS == 1 )
|
|
|
+ {
|
|
|
+ pxTaskStatusArray[ uxTask ].ulRunTimeCounter = pxNextTCB->ulRunTimeCounter;
|
|
|
+ }
|
|
|
+ #else
|
|
|
+ {
|
|
|
+ pxTaskStatusArray[ uxTask ].ulRunTimeCounter = 0;
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ #if ( portSTACK_GROWTH > 0 )
|
|
|
+ {
|
|
|
+ pxTaskStatusArray[ uxTask ].usStackHighWaterMark = prvTaskCheckFreeStackSpace( ( uint8_t * ) pxNextTCB->pxEndOfStack );
|
|
|
+ }
|
|
|
+ #else
|
|
|
+ {
|
|
|
+ pxTaskStatusArray[ uxTask ].usStackHighWaterMark = prvTaskCheckFreeStackSpace( ( uint8_t * ) pxNextTCB->pxStack );
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ uxTask++;
|
|
|
+
|
|
|
+ } while( pxNextTCB != pxFirstTCB );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ return uxTask;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_TRACE_FACILITY */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( ( configUSE_TRACE_FACILITY == 1 ) || ( INCLUDE_uxTaskGetStackHighWaterMark == 1 ) )
|
|
|
+
|
|
|
+ static uint16_t prvTaskCheckFreeStackSpace( const uint8_t * pucStackByte )
|
|
|
+ {
|
|
|
+ uint32_t ulCount = 0U;
|
|
|
+
|
|
|
+ while( *pucStackByte == ( uint8_t ) tskSTACK_FILL_BYTE )
|
|
|
+ {
|
|
|
+ pucStackByte -= portSTACK_GROWTH;
|
|
|
+ ulCount++;
|
|
|
+ }
|
|
|
+
|
|
|
+ ulCount /= ( uint32_t ) sizeof( StackType_t ); /*lint !e961 Casting is not redundant on smaller architectures. */
|
|
|
+
|
|
|
+ return ( uint16_t ) ulCount;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* ( ( configUSE_TRACE_FACILITY == 1 ) || ( INCLUDE_uxTaskGetStackHighWaterMark == 1 ) ) */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_uxTaskGetStackHighWaterMark == 1 )
|
|
|
+
|
|
|
+ UBaseType_t uxTaskGetStackHighWaterMark( TaskHandle_t xTask )
|
|
|
+ {
|
|
|
+ TCB_t *pxTCB;
|
|
|
+ uint8_t *pucEndOfStack;
|
|
|
+ UBaseType_t uxReturn;
|
|
|
+
|
|
|
+ pxTCB = prvGetTCBFromHandle( xTask );
|
|
|
+
|
|
|
+ #if portSTACK_GROWTH < 0
|
|
|
+ {
|
|
|
+ pucEndOfStack = ( uint8_t * ) pxTCB->pxStack;
|
|
|
+ }
|
|
|
+ #else
|
|
|
+ {
|
|
|
+ pucEndOfStack = ( uint8_t * ) pxTCB->pxEndOfStack;
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ uxReturn = ( UBaseType_t ) prvTaskCheckFreeStackSpace( pucEndOfStack );
|
|
|
+
|
|
|
+ return uxReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* INCLUDE_uxTaskGetStackHighWaterMark */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( INCLUDE_vTaskDelete == 1 )
|
|
|
+
|
|
|
+ static void prvDeleteTCB( TCB_t *pxTCB )
|
|
|
+ {
|
|
|
+ /* This call is required specifically for the TriCore port. It must be
|
|
|
+ above the vPortFree() calls. The call is also used by ports/demos that
|
|
|
+ want to allocate and clean RAM statically. */
|
|
|
+ portCLEAN_UP_TCB( pxTCB );
|
|
|
+
|
|
|
+ /* Free up the memory allocated by the scheduler for the task. It is up
|
|
|
+ to the task to free any memory allocated at the application level. */
|
|
|
+ #if ( configUSE_NEWLIB_REENTRANT == 1 )
|
|
|
+ {
|
|
|
+ _reclaim_reent( &( pxTCB->xNewLib_reent ) );
|
|
|
+ }
|
|
|
+ #endif /* configUSE_NEWLIB_REENTRANT */
|
|
|
+
|
|
|
+ #if( portUSING_MPU_WRAPPERS == 1 )
|
|
|
+ {
|
|
|
+ /* Only free the stack if it was allocated dynamically in the first
|
|
|
+ place. */
|
|
|
+ if( pxTCB->xUsingStaticallyAllocatedStack == pdFALSE )
|
|
|
+ {
|
|
|
+ vPortFreeAligned( pxTCB->pxStack );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #else
|
|
|
+ {
|
|
|
+ vPortFreeAligned( pxTCB->pxStack );
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ vPortFree( pxTCB );
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* INCLUDE_vTaskDelete */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+static void prvResetNextTaskUnblockTime( void )
|
|
|
+{
|
|
|
+TCB_t *pxTCB;
|
|
|
+
|
|
|
+ if( listLIST_IS_EMPTY( pxDelayedTaskList ) != pdFALSE )
|
|
|
+ {
|
|
|
+ /* The new current delayed list is empty. Set
|
|
|
+ xNextTaskUnblockTime to the maximum possible value so it is
|
|
|
+ extremely unlikely that the
|
|
|
+ if( xTickCount >= xNextTaskUnblockTime ) test will pass until
|
|
|
+ there is an item in the delayed list. */
|
|
|
+ xNextTaskUnblockTime = portMAX_DELAY;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The new current delayed list is not empty, get the value of
|
|
|
+ the item at the head of the delayed list. This is the time at
|
|
|
+ which the task at the head of the delayed list should be removed
|
|
|
+ from the Blocked state. */
|
|
|
+ ( pxTCB ) = ( TCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( pxDelayedTaskList );
|
|
|
+ xNextTaskUnblockTime = listGET_LIST_ITEM_VALUE( &( ( pxTCB )->xGenericListItem ) );
|
|
|
+ }
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( ( INCLUDE_xTaskGetCurrentTaskHandle == 1 ) || ( configUSE_MUTEXES == 1 ) )
|
|
|
+
|
|
|
+ TaskHandle_t xTaskGetCurrentTaskHandle( void )
|
|
|
+ {
|
|
|
+ TaskHandle_t xReturn;
|
|
|
+
|
|
|
+ /* A critical section is not required as this is not called from
|
|
|
+ an interrupt and the current TCB will always be the same for any
|
|
|
+ individual execution thread. */
|
|
|
+ xReturn = pxCurrentTCB;
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* ( ( INCLUDE_xTaskGetCurrentTaskHandle == 1 ) || ( configUSE_MUTEXES == 1 ) ) */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )
|
|
|
+
|
|
|
+ BaseType_t xTaskGetSchedulerState( void )
|
|
|
+ {
|
|
|
+ BaseType_t xReturn;
|
|
|
+
|
|
|
+ if( xSchedulerRunning == pdFALSE )
|
|
|
+ {
|
|
|
+ xReturn = taskSCHEDULER_NOT_STARTED;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
+ {
|
|
|
+ xReturn = taskSCHEDULER_RUNNING;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ xReturn = taskSCHEDULER_SUSPENDED;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) ) */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( configUSE_MUTEXES == 1 )
|
|
|
+
|
|
|
+ void vTaskPriorityInherit( TaskHandle_t const pxMutexHolder )
|
|
|
+ {
|
|
|
+ TCB_t * const pxTCB = ( TCB_t * ) pxMutexHolder;
|
|
|
+
|
|
|
+ /* If the mutex was given back by an interrupt while the queue was
|
|
|
+ locked then the mutex holder might now be NULL. */
|
|
|
+ if( pxMutexHolder != NULL )
|
|
|
+ {
|
|
|
+ if( pxTCB->uxPriority < pxCurrentTCB->uxPriority )
|
|
|
+ {
|
|
|
+ /* Adjust the mutex holder state to account for its new
|
|
|
+ priority. Only reset the event list item value if the value is
|
|
|
+ not being used for anything else. */
|
|
|
+ if( ( listGET_LIST_ITEM_VALUE( &( pxTCB->xEventListItem ) ) & taskEVENT_LIST_ITEM_VALUE_IN_USE ) == 0UL )
|
|
|
+ {
|
|
|
+ listSET_LIST_ITEM_VALUE( &( pxTCB->xEventListItem ), ( TickType_t ) configMAX_PRIORITIES - ( TickType_t ) pxCurrentTCB->uxPriority ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* If the task being modified is in the ready state it will need to
|
|
|
+ be moved into a new list. */
|
|
|
+ if( listIS_CONTAINED_WITHIN( &( pxReadyTasksLists[ pxTCB->uxPriority ] ), &( pxTCB->xGenericListItem ) ) != pdFALSE )
|
|
|
+ {
|
|
|
+ if( uxListRemove( &( pxTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ taskRESET_READY_PRIORITY( pxTCB->uxPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Inherit the priority before being moved into the new list. */
|
|
|
+ pxTCB->uxPriority = pxCurrentTCB->uxPriority;
|
|
|
+ prvAddTaskToReadyList( pxTCB );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* Just inherit the priority. */
|
|
|
+ pxTCB->uxPriority = pxCurrentTCB->uxPriority;
|
|
|
+ }
|
|
|
+
|
|
|
+ traceTASK_PRIORITY_INHERIT( pxTCB, pxCurrentTCB->uxPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_MUTEXES */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( configUSE_MUTEXES == 1 )
|
|
|
+
|
|
|
+ BaseType_t xTaskPriorityDisinherit( TaskHandle_t const pxMutexHolder )
|
|
|
+ {
|
|
|
+ TCB_t * const pxTCB = ( TCB_t * ) pxMutexHolder;
|
|
|
+ BaseType_t xReturn = pdFALSE;
|
|
|
+
|
|
|
+ if( pxMutexHolder != NULL )
|
|
|
+ {
|
|
|
+ configASSERT( pxTCB->uxMutexesHeld );
|
|
|
+ ( pxTCB->uxMutexesHeld )--;
|
|
|
+
|
|
|
+ if( pxTCB->uxPriority != pxTCB->uxBasePriority )
|
|
|
+ {
|
|
|
+ /* Only disinherit if no other mutexes are held. */
|
|
|
+ if( pxTCB->uxMutexesHeld == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ /* A task can only have an inhertied priority if it holds
|
|
|
+ the mutex. If the mutex is held by a task then it cannot be
|
|
|
+ given from an interrupt, and if a mutex is given by the
|
|
|
+ holding task then it must be the running state task. Remove
|
|
|
+ the holding task from the ready list. */
|
|
|
+ if( uxListRemove( &( pxTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ taskRESET_READY_PRIORITY( pxTCB->uxPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Disinherit the priority before adding the task into the
|
|
|
+ new ready list. */
|
|
|
+ traceTASK_PRIORITY_DISINHERIT( pxTCB, pxTCB->uxBasePriority );
|
|
|
+ pxTCB->uxPriority = pxTCB->uxBasePriority;
|
|
|
+
|
|
|
+ /* Reset the event list item value. It cannot be in use for
|
|
|
+ any other purpose if this task is running, and it must be
|
|
|
+ running to give back the mutex. */
|
|
|
+ listSET_LIST_ITEM_VALUE( &( pxTCB->xEventListItem ), ( TickType_t ) configMAX_PRIORITIES - ( TickType_t ) pxTCB->uxPriority ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
+ prvAddTaskToReadyList( pxTCB );
|
|
|
+
|
|
|
+ /* Return true to indicate that a context switch is required.
|
|
|
+ This is only actually required in the corner case whereby
|
|
|
+ multiple mutexes were held and the mutexes were given back
|
|
|
+ in an order different to that in which they were taken.
|
|
|
+ If a context switch did not occur when the first mutex was
|
|
|
+ returned, even if a task was waiting on it, then a context
|
|
|
+ switch should occur when the last mutex is returned whether
|
|
|
+ a task is waiting on it or not. */
|
|
|
+ xReturn = pdTRUE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_MUTEXES */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( portCRITICAL_NESTING_IN_TCB == 1 )
|
|
|
+
|
|
|
+ void vTaskEnterCritical( void )
|
|
|
+ {
|
|
|
+ portDISABLE_INTERRUPTS();
|
|
|
+
|
|
|
+ if( xSchedulerRunning != pdFALSE )
|
|
|
+ {
|
|
|
+ ( pxCurrentTCB->uxCriticalNesting )++;
|
|
|
+
|
|
|
+ /* This is not the interrupt safe version of the enter critical
|
|
|
+ function so assert() if it is being called from an interrupt
|
|
|
+ context. Only API functions that end in "FromISR" can be used in an
|
|
|
+ interrupt. Only assert if the critical nesting count is 1 to
|
|
|
+ protect against recursive calls if the assert function also uses a
|
|
|
+ critical section. */
|
|
|
+ if( pxCurrentTCB->uxCriticalNesting == 1 )
|
|
|
+ {
|
|
|
+ portASSERT_IF_IN_ISR();
|
|
|
+ }
|
|
|
+
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* portCRITICAL_NESTING_IN_TCB */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( portCRITICAL_NESTING_IN_TCB == 1 )
|
|
|
+
|
|
|
+ void vTaskExitCritical( void )
|
|
|
+ {
|
|
|
+ if( xSchedulerRunning != pdFALSE )
|
|
|
+ {
|
|
|
+ if( pxCurrentTCB->uxCriticalNesting > 0U )
|
|
|
+ {
|
|
|
+ ( pxCurrentTCB->uxCriticalNesting )--;
|
|
|
+
|
|
|
+ if( pxCurrentTCB->uxCriticalNesting == 0U )
|
|
|
+ {
|
|
|
+ portENABLE_INTERRUPTS();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* portCRITICAL_NESTING_IN_TCB */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( ( configUSE_TRACE_FACILITY == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) )
|
|
|
+
|
|
|
+ static char *prvWriteNameToBuffer( char *pcBuffer, const char *pcTaskName )
|
|
|
+ {
|
|
|
+ BaseType_t x;
|
|
|
+
|
|
|
+ /* Start by copying the entire string. */
|
|
|
+ strcpy( pcBuffer, pcTaskName );
|
|
|
+
|
|
|
+ /* Pad the end of the string with spaces to ensure columns line up when
|
|
|
+ printed out. */
|
|
|
+ for( x = strlen( pcBuffer ); x < ( configMAX_TASK_NAME_LEN - 1 ); x++ )
|
|
|
+ {
|
|
|
+ pcBuffer[ x ] = ' ';
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Terminate. */
|
|
|
+ pcBuffer[ x ] = 0x00;
|
|
|
+
|
|
|
+ /* Return the new end of string. */
|
|
|
+ return &( pcBuffer[ x ] );
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* ( configUSE_TRACE_FACILITY == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( ( configUSE_TRACE_FACILITY == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) )
|
|
|
+
|
|
|
+ void vTaskList( char * pcWriteBuffer )
|
|
|
+ {
|
|
|
+ TaskStatus_t *pxTaskStatusArray;
|
|
|
+ volatile UBaseType_t uxArraySize, x;
|
|
|
+ char cStatus;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * PLEASE NOTE:
|
|
|
+ *
|
|
|
+ * This function is provided for convenience only, and is used by many
|
|
|
+ * of the demo applications. Do not consider it to be part of the
|
|
|
+ * scheduler.
|
|
|
+ *
|
|
|
+ * vTaskList() calls uxTaskGetSystemState(), then formats part of the
|
|
|
+ * uxTaskGetSystemState() output into a human readable table that
|
|
|
+ * displays task names, states and stack usage.
|
|
|
+ *
|
|
|
+ * vTaskList() has a dependency on the sprintf() C library function that
|
|
|
+ * might bloat the code size, use a lot of stack, and provide different
|
|
|
+ * results on different platforms. An alternative, tiny, third party,
|
|
|
+ * and limited functionality implementation of sprintf() is provided in
|
|
|
+ * many of the FreeRTOS/Demo sub-directories in a file called
|
|
|
+ * printf-stdarg.c (note printf-stdarg.c does not provide a full
|
|
|
+ * snprintf() implementation!).
|
|
|
+ *
|
|
|
+ * It is recommended that production systems call uxTaskGetSystemState()
|
|
|
+ * directly to get access to raw stats data, rather than indirectly
|
|
|
+ * through a call to vTaskList().
|
|
|
+ */
|
|
|
+
|
|
|
+
|
|
|
+ /* Make sure the write buffer does not contain a string. */
|
|
|
+ *pcWriteBuffer = 0x00;
|
|
|
+
|
|
|
+ /* Take a snapshot of the number of tasks in case it changes while this
|
|
|
+ function is executing. */
|
|
|
+ uxArraySize = uxCurrentNumberOfTasks;
|
|
|
+
|
|
|
+ /* Allocate an array index for each task. */
|
|
|
+ pxTaskStatusArray = pvPortMalloc( uxCurrentNumberOfTasks * sizeof( TaskStatus_t ) );
|
|
|
+
|
|
|
+ if( pxTaskStatusArray != NULL )
|
|
|
+ {
|
|
|
+ /* Generate the (binary) data. */
|
|
|
+ uxArraySize = uxTaskGetSystemState( pxTaskStatusArray, uxArraySize, NULL );
|
|
|
+
|
|
|
+ /* Create a human readable table from the binary data. */
|
|
|
+ for( x = 0; x < uxArraySize; x++ )
|
|
|
+ {
|
|
|
+ switch( pxTaskStatusArray[ x ].eCurrentState )
|
|
|
+ {
|
|
|
+ case eReady: cStatus = tskREADY_CHAR;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case eBlocked: cStatus = tskBLOCKED_CHAR;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case eSuspended: cStatus = tskSUSPENDED_CHAR;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case eDeleted: cStatus = tskDELETED_CHAR;
|
|
|
+ break;
|
|
|
+
|
|
|
+ default: /* Should not get here, but it is included
|
|
|
+ to prevent static checking errors. */
|
|
|
+ cStatus = 0x00;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Write the task name to the string, padding with spaces so it
|
|
|
+ can be printed in tabular form more easily. */
|
|
|
+ pcWriteBuffer = prvWriteNameToBuffer( pcWriteBuffer, pxTaskStatusArray[ x ].pcTaskName );
|
|
|
+
|
|
|
+ /* Write the rest of the string. */
|
|
|
+ sprintf( pcWriteBuffer, "\t%c\t%u\t%u\t%u\r\n", cStatus, ( unsigned int ) pxTaskStatusArray[ x ].uxCurrentPriority, ( unsigned int ) pxTaskStatusArray[ x ].usStackHighWaterMark, ( unsigned int ) pxTaskStatusArray[ x ].xTaskNumber );
|
|
|
+ pcWriteBuffer += strlen( pcWriteBuffer );
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Free the array again. */
|
|
|
+ vPortFree( pxTaskStatusArray );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* ( ( configUSE_TRACE_FACILITY == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) ) */
|
|
|
+/*----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( ( configGENERATE_RUN_TIME_STATS == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) )
|
|
|
+
|
|
|
+ void vTaskGetRunTimeStats( char *pcWriteBuffer )
|
|
|
+ {
|
|
|
+ TaskStatus_t *pxTaskStatusArray;
|
|
|
+ volatile UBaseType_t uxArraySize, x;
|
|
|
+ uint32_t ulTotalTime, ulStatsAsPercentage;
|
|
|
+
|
|
|
+ #if( configUSE_TRACE_FACILITY != 1 )
|
|
|
+ {
|
|
|
+ #error configUSE_TRACE_FACILITY must also be set to 1 in FreeRTOSConfig.h to use vTaskGetRunTimeStats().
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+
|
|
|
+ /*
|
|
|
+ * PLEASE NOTE:
|
|
|
+ *
|
|
|
+ * This function is provided for convenience only, and is used by many
|
|
|
+ * of the demo applications. Do not consider it to be part of the
|
|
|
+ * scheduler.
|
|
|
+ *
|
|
|
+ * vTaskGetRunTimeStats() calls uxTaskGetSystemState(), then formats part
|
|
|
+ * of the uxTaskGetSystemState() output into a human readable table that
|
|
|
+ * displays the amount of time each task has spent in the Running state
|
|
|
+ * in both absolute and percentage terms.
|
|
|
+ *
|
|
|
+ * vTaskGetRunTimeStats() has a dependency on the sprintf() C library
|
|
|
+ * function that might bloat the code size, use a lot of stack, and
|
|
|
+ * provide different results on different platforms. An alternative,
|
|
|
+ * tiny, third party, and limited functionality implementation of
|
|
|
+ * sprintf() is provided in many of the FreeRTOS/Demo sub-directories in
|
|
|
+ * a file called printf-stdarg.c (note printf-stdarg.c does not provide
|
|
|
+ * a full snprintf() implementation!).
|
|
|
+ *
|
|
|
+ * It is recommended that production systems call uxTaskGetSystemState()
|
|
|
+ * directly to get access to raw stats data, rather than indirectly
|
|
|
+ * through a call to vTaskGetRunTimeStats().
|
|
|
+ */
|
|
|
+
|
|
|
+ /* Make sure the write buffer does not contain a string. */
|
|
|
+ *pcWriteBuffer = 0x00;
|
|
|
+
|
|
|
+ /* Take a snapshot of the number of tasks in case it changes while this
|
|
|
+ function is executing. */
|
|
|
+ uxArraySize = uxCurrentNumberOfTasks;
|
|
|
+
|
|
|
+ /* Allocate an array index for each task. */
|
|
|
+ pxTaskStatusArray = pvPortMalloc( uxCurrentNumberOfTasks * sizeof( TaskStatus_t ) );
|
|
|
+
|
|
|
+ if( pxTaskStatusArray != NULL )
|
|
|
+ {
|
|
|
+ /* Generate the (binary) data. */
|
|
|
+ uxArraySize = uxTaskGetSystemState( pxTaskStatusArray, uxArraySize, &ulTotalTime );
|
|
|
+
|
|
|
+ /* For percentage calculations. */
|
|
|
+ ulTotalTime /= 100UL;
|
|
|
+
|
|
|
+ /* Avoid divide by zero errors. */
|
|
|
+ if( ulTotalTime > 0 )
|
|
|
+ {
|
|
|
+ /* Create a human readable table from the binary data. */
|
|
|
+ for( x = 0; x < uxArraySize; x++ )
|
|
|
+ {
|
|
|
+ /* What percentage of the total run time has the task used?
|
|
|
+ This will always be rounded down to the nearest integer.
|
|
|
+ ulTotalRunTimeDiv100 has already been divided by 100. */
|
|
|
+ ulStatsAsPercentage = pxTaskStatusArray[ x ].ulRunTimeCounter / ulTotalTime;
|
|
|
+
|
|
|
+ /* Write the task name to the string, padding with
|
|
|
+ spaces so it can be printed in tabular form more
|
|
|
+ easily. */
|
|
|
+ pcWriteBuffer = prvWriteNameToBuffer( pcWriteBuffer, pxTaskStatusArray[ x ].pcTaskName );
|
|
|
+
|
|
|
+ if( ulStatsAsPercentage > 0UL )
|
|
|
+ {
|
|
|
+ #ifdef portLU_PRINTF_SPECIFIER_REQUIRED
|
|
|
+ {
|
|
|
+ sprintf( pcWriteBuffer, "\t%lu\t\t%lu%%\r\n", pxTaskStatusArray[ x ].ulRunTimeCounter, ulStatsAsPercentage );
|
|
|
+ }
|
|
|
+ #else
|
|
|
+ {
|
|
|
+ /* sizeof( int ) == sizeof( long ) so a smaller
|
|
|
+ printf() library can be used. */
|
|
|
+ sprintf( pcWriteBuffer, "\t%u\t\t%u%%\r\n", ( unsigned int ) pxTaskStatusArray[ x ].ulRunTimeCounter, ( unsigned int ) ulStatsAsPercentage );
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* If the percentage is zero here then the task has
|
|
|
+ consumed less than 1% of the total run time. */
|
|
|
+ #ifdef portLU_PRINTF_SPECIFIER_REQUIRED
|
|
|
+ {
|
|
|
+ sprintf( pcWriteBuffer, "\t%lu\t\t<1%%\r\n", pxTaskStatusArray[ x ].ulRunTimeCounter );
|
|
|
+ }
|
|
|
+ #else
|
|
|
+ {
|
|
|
+ /* sizeof( int ) == sizeof( long ) so a smaller
|
|
|
+ printf() library can be used. */
|
|
|
+ sprintf( pcWriteBuffer, "\t%u\t\t<1%%\r\n", ( unsigned int ) pxTaskStatusArray[ x ].ulRunTimeCounter );
|
|
|
+ }
|
|
|
+ #endif
|
|
|
+ }
|
|
|
+
|
|
|
+ pcWriteBuffer += strlen( pcWriteBuffer );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Free the array again. */
|
|
|
+ vPortFree( pxTaskStatusArray );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* ( ( configGENERATE_RUN_TIME_STATS == 1 ) && ( configUSE_STATS_FORMATTING_FUNCTIONS > 0 ) ) */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+TickType_t uxTaskResetEventItemValue( void )
|
|
|
+{
|
|
|
+TickType_t uxReturn;
|
|
|
+
|
|
|
+ uxReturn = listGET_LIST_ITEM_VALUE( &( pxCurrentTCB->xEventListItem ) );
|
|
|
+
|
|
|
+ /* Reset the event list item to its normal value - so it can be used with
|
|
|
+ queues and semaphores. */
|
|
|
+ listSET_LIST_ITEM_VALUE( &( pxCurrentTCB->xEventListItem ), ( ( TickType_t ) configMAX_PRIORITIES - ( TickType_t ) pxCurrentTCB->uxPriority ) ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
|
|
|
+
|
|
|
+ return uxReturn;
|
|
|
+}
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if ( configUSE_MUTEXES == 1 )
|
|
|
+
|
|
|
+ void *pvTaskIncrementMutexHeldCount( void )
|
|
|
+ {
|
|
|
+ /* If xSemaphoreCreateMutex() is called before any tasks have been created
|
|
|
+ then pxCurrentTCB will be NULL. */
|
|
|
+ if( pxCurrentTCB != NULL )
|
|
|
+ {
|
|
|
+ ( pxCurrentTCB->uxMutexesHeld )++;
|
|
|
+ }
|
|
|
+
|
|
|
+ return pxCurrentTCB;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_MUTEXES */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
+
|
|
|
+ uint32_t ulTaskNotifyTake( BaseType_t xClearCountOnExit, TickType_t xTicksToWait )
|
|
|
+ {
|
|
|
+ TickType_t xTimeToWake;
|
|
|
+ uint32_t ulReturn;
|
|
|
+
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ /* Only block if the notification count is not already non-zero. */
|
|
|
+ if( pxCurrentTCB->ulNotifiedValue == 0UL )
|
|
|
+ {
|
|
|
+ /* Mark this task as waiting for a notification. */
|
|
|
+ pxCurrentTCB->eNotifyState = eWaitingNotification;
|
|
|
+
|
|
|
+ if( xTicksToWait > ( TickType_t ) 0 )
|
|
|
+ {
|
|
|
+ /* The task is going to block. First it must be removed
|
|
|
+ from the ready list. */
|
|
|
+ if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ /* The current task must be in a ready list, so there is
|
|
|
+ no need to check, and the port reset macro can be called
|
|
|
+ directly. */
|
|
|
+ portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+ {
|
|
|
+ if( xTicksToWait == portMAX_DELAY )
|
|
|
+ {
|
|
|
+ /* Add the task to the suspended task list instead
|
|
|
+ of a delayed task list to ensure the task is not
|
|
|
+ woken by a timing event. It will block
|
|
|
+ indefinitely. */
|
|
|
+ vListInsertEnd( &xSuspendedTaskList, &( pxCurrentTCB->xGenericListItem ) );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* Calculate the time at which the task should be
|
|
|
+ woken if no notification events occur. This may
|
|
|
+ overflow but this doesn't matter, the scheduler will
|
|
|
+ handle it. */
|
|
|
+ xTimeToWake = xTickCount + xTicksToWait;
|
|
|
+ prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #else /* INCLUDE_vTaskSuspend */
|
|
|
+ {
|
|
|
+ /* Calculate the time at which the task should be
|
|
|
+ woken if the event does not occur. This may
|
|
|
+ overflow but this doesn't matter, the scheduler will
|
|
|
+ handle it. */
|
|
|
+ xTimeToWake = xTickCount + xTicksToWait;
|
|
|
+ prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
+ }
|
|
|
+ #endif /* INCLUDE_vTaskSuspend */
|
|
|
+
|
|
|
+ /* All ports are written to allow a yield in a critical
|
|
|
+ section (some will yield immediately, others wait until the
|
|
|
+ critical section exits) - but it is not something that
|
|
|
+ application code should ever do. */
|
|
|
+ portYIELD_WITHIN_API();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ ulReturn = pxCurrentTCB->ulNotifiedValue;
|
|
|
+
|
|
|
+ if( ulReturn != 0UL )
|
|
|
+ {
|
|
|
+ if( xClearCountOnExit != pdFALSE )
|
|
|
+ {
|
|
|
+ pxCurrentTCB->ulNotifiedValue = 0UL;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ ( pxCurrentTCB->ulNotifiedValue )--;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ pxCurrentTCB->eNotifyState = eNotWaitingNotification;
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ return ulReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_TASK_NOTIFICATIONS */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
+
|
|
|
+ BaseType_t xTaskNotifyWait( uint32_t ulBitsToClearOnEntry, uint32_t ulBitsToClearOnExit, uint32_t *pulNotificationValue, TickType_t xTicksToWait )
|
|
|
+ {
|
|
|
+ TickType_t xTimeToWake;
|
|
|
+ BaseType_t xReturn;
|
|
|
+
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ /* Only block if a notification is not already pending. */
|
|
|
+ if( pxCurrentTCB->eNotifyState != eNotified )
|
|
|
+ {
|
|
|
+ /* Clear bits in the task's notification value as bits may get
|
|
|
+ set by the notifying task or interrupt. This can be used to
|
|
|
+ clear the value to zero. */
|
|
|
+ pxCurrentTCB->ulNotifiedValue &= ~ulBitsToClearOnEntry;
|
|
|
+
|
|
|
+ /* Mark this task as waiting for a notification. */
|
|
|
+ pxCurrentTCB->eNotifyState = eWaitingNotification;
|
|
|
+
|
|
|
+ if( xTicksToWait > ( TickType_t ) 0 )
|
|
|
+ {
|
|
|
+ /* The task is going to block. First it must be removed
|
|
|
+ from the ready list. */
|
|
|
+ if( uxListRemove( &( pxCurrentTCB->xGenericListItem ) ) == ( UBaseType_t ) 0 )
|
|
|
+ {
|
|
|
+ /* The current task must be in a ready list, so there is
|
|
|
+ no need to check, and the port reset macro can be called
|
|
|
+ directly. */
|
|
|
+ portRESET_READY_PRIORITY( pxCurrentTCB->uxPriority, uxTopReadyPriority );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+
|
|
|
+ #if ( INCLUDE_vTaskSuspend == 1 )
|
|
|
+ {
|
|
|
+ if( xTicksToWait == portMAX_DELAY )
|
|
|
+ {
|
|
|
+ /* Add the task to the suspended task list instead
|
|
|
+ of a delayed task list to ensure the task is not
|
|
|
+ woken by a timing event. It will block
|
|
|
+ indefinitely. */
|
|
|
+ vListInsertEnd( &xSuspendedTaskList, &( pxCurrentTCB->xGenericListItem ) );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* Calculate the time at which the task should be
|
|
|
+ woken if no notification events occur. This may
|
|
|
+ overflow but this doesn't matter, the scheduler will
|
|
|
+ handle it. */
|
|
|
+ xTimeToWake = xTickCount + xTicksToWait;
|
|
|
+ prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
+ }
|
|
|
+ }
|
|
|
+ #else /* INCLUDE_vTaskSuspend */
|
|
|
+ {
|
|
|
+ /* Calculate the time at which the task should be
|
|
|
+ woken if the event does not occur. This may
|
|
|
+ overflow but this doesn't matter, the scheduler will
|
|
|
+ handle it. */
|
|
|
+ xTimeToWake = xTickCount + xTicksToWait;
|
|
|
+ prvAddCurrentTaskToDelayedList( xTimeToWake );
|
|
|
+ }
|
|
|
+ #endif /* INCLUDE_vTaskSuspend */
|
|
|
+
|
|
|
+ /* All ports are written to allow a yield in a critical
|
|
|
+ section (some will yield immediately, others wait until the
|
|
|
+ critical section exits) - but it is not something that
|
|
|
+ application code should ever do. */
|
|
|
+ portYIELD_WITHIN_API();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ if( pulNotificationValue != NULL )
|
|
|
+ {
|
|
|
+ /* Output the current notification value, which may or may not
|
|
|
+ have changed. */
|
|
|
+ *pulNotificationValue = pxCurrentTCB->ulNotifiedValue;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* If eNotifyValue is set then either the task never entered the
|
|
|
+ blocked state (because a notification was already pending) or the
|
|
|
+ task unblocked because of a notification. Otherwise the task
|
|
|
+ unblocked because of a timeout. */
|
|
|
+ if( pxCurrentTCB->eNotifyState == eWaitingNotification )
|
|
|
+ {
|
|
|
+ /* A notification was not received. */
|
|
|
+ xReturn = pdFALSE;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* A notification was already pending or a notification was
|
|
|
+ received while the task was waiting. */
|
|
|
+ pxCurrentTCB->ulNotifiedValue &= ~ulBitsToClearOnExit;
|
|
|
+ xReturn = pdTRUE;
|
|
|
+ }
|
|
|
+
|
|
|
+ pxCurrentTCB->eNotifyState = eNotWaitingNotification;
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_TASK_NOTIFICATIONS */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
+
|
|
|
+ BaseType_t xTaskNotify( TaskHandle_t xTaskToNotify, uint32_t ulValue, eNotifyAction eAction )
|
|
|
+ {
|
|
|
+ TCB_t * pxTCB;
|
|
|
+ eNotifyValue eOriginalNotifyState;
|
|
|
+ BaseType_t xReturn = pdPASS;
|
|
|
+
|
|
|
+ configASSERT( xTaskToNotify );
|
|
|
+ pxTCB = ( TCB_t * ) xTaskToNotify;
|
|
|
+
|
|
|
+ taskENTER_CRITICAL();
|
|
|
+ {
|
|
|
+ eOriginalNotifyState = pxTCB->eNotifyState;
|
|
|
+
|
|
|
+ pxTCB->eNotifyState = eNotified;
|
|
|
+
|
|
|
+ switch( eAction )
|
|
|
+ {
|
|
|
+ case eSetBits :
|
|
|
+ pxTCB->ulNotifiedValue |= ulValue;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case eIncrement :
|
|
|
+ ( pxTCB->ulNotifiedValue )++;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case eSetValueWithOverwrite :
|
|
|
+ pxTCB->ulNotifiedValue = ulValue;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case eSetValueWithoutOverwrite :
|
|
|
+ if( eOriginalNotifyState != eNotified )
|
|
|
+ {
|
|
|
+ pxTCB->ulNotifiedValue = ulValue;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The value could not be written to the task. */
|
|
|
+ xReturn = pdFAIL;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+
|
|
|
+ case eNoAction:
|
|
|
+ /* The task is being notified without its notify value being
|
|
|
+ updated. */
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* If the task is in the blocked state specifically to wait for a
|
|
|
+ notification then unblock it now. */
|
|
|
+ if( eOriginalNotifyState == eWaitingNotification )
|
|
|
+ {
|
|
|
+ ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
+ prvAddTaskToReadyList( pxTCB );
|
|
|
+
|
|
|
+ /* The task should not have been on an event list. */
|
|
|
+ configASSERT( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) == NULL );
|
|
|
+
|
|
|
+ if( pxTCB->uxPriority > pxCurrentTCB->uxPriority )
|
|
|
+ {
|
|
|
+ /* The notified task has a priority above the currently
|
|
|
+ executing task so a yield is required. */
|
|
|
+ portYIELD_WITHIN_API();
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ taskEXIT_CRITICAL();
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_TASK_NOTIFICATIONS */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
+
|
|
|
+ BaseType_t xTaskNotifyFromISR( TaskHandle_t xTaskToNotify, uint32_t ulValue, eNotifyAction eAction, BaseType_t *pxHigherPriorityTaskWoken )
|
|
|
+ {
|
|
|
+ TCB_t * pxTCB;
|
|
|
+ eNotifyValue eOriginalNotifyState;
|
|
|
+ BaseType_t xReturn = pdPASS;
|
|
|
+ UBaseType_t uxSavedInterruptStatus;
|
|
|
+
|
|
|
+ configASSERT( xTaskToNotify );
|
|
|
+
|
|
|
+ /* RTOS ports that support interrupt nesting have the concept of a
|
|
|
+ maximum system call (or maximum API call) interrupt priority.
|
|
|
+ Interrupts that are above the maximum system call priority are keep
|
|
|
+ permanently enabled, even when the RTOS kernel is in a critical section,
|
|
|
+ but cannot make any calls to FreeRTOS API functions. If configASSERT()
|
|
|
+ is defined in FreeRTOSConfig.h then
|
|
|
+ portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion
|
|
|
+ failure if a FreeRTOS API function is called from an interrupt that has
|
|
|
+ been assigned a priority above the configured maximum system call
|
|
|
+ priority. Only FreeRTOS functions that end in FromISR can be called
|
|
|
+ from interrupts that have been assigned a priority at or (logically)
|
|
|
+ below the maximum system call interrupt priority. FreeRTOS maintains a
|
|
|
+ separate interrupt safe API to ensure interrupt entry is as fast and as
|
|
|
+ simple as possible. More information (albeit Cortex-M specific) is
|
|
|
+ provided on the following link:
|
|
|
+ http://www.freertos.org/RTOS-Cortex-M3-M4.html */
|
|
|
+ portASSERT_IF_INTERRUPT_PRIORITY_INVALID();
|
|
|
+
|
|
|
+ pxTCB = ( TCB_t * ) xTaskToNotify;
|
|
|
+
|
|
|
+ uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
|
|
|
+ {
|
|
|
+ eOriginalNotifyState = pxTCB->eNotifyState;
|
|
|
+
|
|
|
+ pxTCB->eNotifyState = eNotified;
|
|
|
+
|
|
|
+ switch( eAction )
|
|
|
+ {
|
|
|
+ case eSetBits :
|
|
|
+ pxTCB->ulNotifiedValue |= ulValue;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case eIncrement :
|
|
|
+ ( pxTCB->ulNotifiedValue )++;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case eSetValueWithOverwrite :
|
|
|
+ pxTCB->ulNotifiedValue = ulValue;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case eSetValueWithoutOverwrite :
|
|
|
+ if( eOriginalNotifyState != eNotified )
|
|
|
+ {
|
|
|
+ pxTCB->ulNotifiedValue = ulValue;
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The value could not be written to the task. */
|
|
|
+ xReturn = pdFAIL;
|
|
|
+ }
|
|
|
+ break;
|
|
|
+
|
|
|
+ case eNoAction :
|
|
|
+ /* The task is being notified without its notify value being
|
|
|
+ updated. */
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ /* If the task is in the blocked state specifically to wait for a
|
|
|
+ notification then unblock it now. */
|
|
|
+ if( eOriginalNotifyState == eWaitingNotification )
|
|
|
+ {
|
|
|
+ /* The task should not have been on an event list. */
|
|
|
+ configASSERT( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) == NULL );
|
|
|
+
|
|
|
+ if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
+ {
|
|
|
+ ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
+ prvAddTaskToReadyList( pxTCB );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The delayed and ready lists cannot be accessed, so hold
|
|
|
+ this task pending until the scheduler is resumed. */
|
|
|
+ vListInsertEnd( &( xPendingReadyList ), &( pxTCB->xEventListItem ) );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( pxTCB->uxPriority > pxCurrentTCB->uxPriority )
|
|
|
+ {
|
|
|
+ /* The notified task has a priority above the currently
|
|
|
+ executing task so a yield is required. */
|
|
|
+ if( pxHigherPriorityTaskWoken != NULL )
|
|
|
+ {
|
|
|
+ *pxHigherPriorityTaskWoken = pdTRUE;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
|
|
|
+
|
|
|
+ return xReturn;
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_TASK_NOTIFICATIONS */
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+#if( configUSE_TASK_NOTIFICATIONS == 1 )
|
|
|
+
|
|
|
+ void vTaskNotifyGiveFromISR( TaskHandle_t xTaskToNotify, BaseType_t *pxHigherPriorityTaskWoken )
|
|
|
+ {
|
|
|
+ TCB_t * pxTCB;
|
|
|
+ eNotifyValue eOriginalNotifyState;
|
|
|
+ UBaseType_t uxSavedInterruptStatus;
|
|
|
+
|
|
|
+ configASSERT( xTaskToNotify );
|
|
|
+
|
|
|
+ /* RTOS ports that support interrupt nesting have the concept of a
|
|
|
+ maximum system call (or maximum API call) interrupt priority.
|
|
|
+ Interrupts that are above the maximum system call priority are keep
|
|
|
+ permanently enabled, even when the RTOS kernel is in a critical section,
|
|
|
+ but cannot make any calls to FreeRTOS API functions. If configASSERT()
|
|
|
+ is defined in FreeRTOSConfig.h then
|
|
|
+ portASSERT_IF_INTERRUPT_PRIORITY_INVALID() will result in an assertion
|
|
|
+ failure if a FreeRTOS API function is called from an interrupt that has
|
|
|
+ been assigned a priority above the configured maximum system call
|
|
|
+ priority. Only FreeRTOS functions that end in FromISR can be called
|
|
|
+ from interrupts that have been assigned a priority at or (logically)
|
|
|
+ below the maximum system call interrupt priority. FreeRTOS maintains a
|
|
|
+ separate interrupt safe API to ensure interrupt entry is as fast and as
|
|
|
+ simple as possible. More information (albeit Cortex-M specific) is
|
|
|
+ provided on the following link:
|
|
|
+ http://www.freertos.org/RTOS-Cortex-M3-M4.html */
|
|
|
+ portASSERT_IF_INTERRUPT_PRIORITY_INVALID();
|
|
|
+
|
|
|
+ pxTCB = ( TCB_t * ) xTaskToNotify;
|
|
|
+
|
|
|
+ uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
|
|
|
+ {
|
|
|
+ eOriginalNotifyState = pxTCB->eNotifyState;
|
|
|
+ pxTCB->eNotifyState = eNotified;
|
|
|
+
|
|
|
+ /* 'Giving' is equivalent to incrementing a count in a counting
|
|
|
+ semaphore. */
|
|
|
+ ( pxTCB->ulNotifiedValue )++;
|
|
|
+
|
|
|
+ /* If the task is in the blocked state specifically to wait for a
|
|
|
+ notification then unblock it now. */
|
|
|
+ if( eOriginalNotifyState == eWaitingNotification )
|
|
|
+ {
|
|
|
+ /* The task should not have been on an event list. */
|
|
|
+ configASSERT( listLIST_ITEM_CONTAINER( &( pxTCB->xEventListItem ) ) == NULL );
|
|
|
+
|
|
|
+ if( uxSchedulerSuspended == ( UBaseType_t ) pdFALSE )
|
|
|
+ {
|
|
|
+ ( void ) uxListRemove( &( pxTCB->xGenericListItem ) );
|
|
|
+ prvAddTaskToReadyList( pxTCB );
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ /* The delayed and ready lists cannot be accessed, so hold
|
|
|
+ this task pending until the scheduler is resumed. */
|
|
|
+ vListInsertEnd( &( xPendingReadyList ), &( pxTCB->xEventListItem ) );
|
|
|
+ }
|
|
|
+
|
|
|
+ if( pxTCB->uxPriority > pxCurrentTCB->uxPriority )
|
|
|
+ {
|
|
|
+ /* The notified task has a priority above the currently
|
|
|
+ executing task so a yield is required. */
|
|
|
+ if( pxHigherPriorityTaskWoken != NULL )
|
|
|
+ {
|
|
|
+ *pxHigherPriorityTaskWoken = pdTRUE;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ else
|
|
|
+ {
|
|
|
+ mtCOVERAGE_TEST_MARKER();
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
|
|
|
+ }
|
|
|
+
|
|
|
+#endif /* configUSE_TASK_NOTIFICATIONS */
|
|
|
+
|
|
|
+/*-----------------------------------------------------------*/
|
|
|
+
|
|
|
+
|
|
|
+#ifdef FREERTOS_MODULE_TEST
|
|
|
+ #include "tasks_test_access_functions.h"
|
|
|
+#endif
|
|
|
+
|