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Changes to the FreeRTOS code:
+ Introduced xTaskCreateStatic() to allow tasks to be created without any dynamic memory allocation. + When a task notification is used to unblock a task from an ISR, but the xHigherPriorityTaskWoken parameter is not used, then pend a context switch to occur during the next tick interrupt. Demo application changes: + Updated TaskNotify.c to test the case where a task is unblocked by an ISR, but does not use its xHigherPriorityTaskWoken parameter. + Updated the Win32 MSVC project to test statically allocated tasks being created and deleted. + Introduced StaticAllocation.c standard demo task.
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15 changed files with 839 additions and 115 deletions
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@ -114,9 +114,11 @@ task can tell if any of the suicidal tasks have failed to die.
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*/
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static volatile UBaseType_t uxTasksRunningAtStart = 0;
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/* Tasks are deleted by the idle task. Under heavy load the idle task might
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not get much processing time, so it would be legitimate for several tasks to
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remain undeleted for a short period. */
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/* When a task deletes itself, it stack and TCB are cleaned up by the Idle task.
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Under heavy load the idle task might not get much processing time, so it would
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be legitimate for several tasks to remain undeleted for a short period. There
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may also be a few other unexpected tasks if, for example, the tasks that test
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static allocation are also being used. */
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static const UBaseType_t uxMaxNumberOfExtraTasksRunning = 3;
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/* Used to store a handle to the task that should be killed by a suicidal task,
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@ -151,7 +153,9 @@ UBaseType_t *puxPriority;
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If this is done, then uxTasksRunningAtStart needs incrementing again as that
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too is created when the scheduler is started. */
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#if configUSE_TIMERS == 1
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{
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uxTasksRunningAtStart++;
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}
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#endif
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}
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/*-----------------------------------------------------------*/
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