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Changes to the FreeRTOS code:

Browse source 
+ 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.
This commit is contained in:
Richard Barry 2015-12-20 13:44:21 +00:00
parent 7d6609f8db
commit ea95020ffd
15 changed files with 839 additions and 115 deletions
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26
FreeRTOS/Source/timers.c
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@ -178,6 +178,16 @@ PRIVILEGED_DATA static QueueHandle_t xTimerQueue = NULL;
/*-----------------------------------------------------------*/
#if( configSUPPORT_STATIC_ALLOCATION == 1 )
/* If static allocation is supported then the application must provide the
following callback function - which enables the application to optionally
provide the memory that will be used by the timer task as the task's stack
and TCB. */
extern void vApplicationGetTimerTaskMemory( DummyTCB_t **ppxTimerTaskTCBBuffer, StackType_t **ppxTimerTaskStackBuffer, uint16_t *pusTimerTaskStackSize );
#endif
/*
* Initialise the infrastructure used by the timer service task if it has not
* been initialised already.
@ -240,6 +250,10 @@ static void prvProcessTimerOrBlockTask( const TickType_t xNextExpireTime, BaseTy
BaseType_t xTimerCreateTimerTask( void )
{
BaseType_t xReturn = pdFAIL;
DummyTCB_t *pxTimerTaskTCBBuffer = NULL;
StackType_t *pxTimerTaskStackBuffer = NULL;
uint16_t usTimerTaskStackSize = configTIMER_TASK_STACK_DEPTH;
/* This function is called when the scheduler is started if
configUSE_TIMERS is set to 1. Check that the infrastructure used by the
@ -249,16 +263,24 @@ BaseType_t xReturn = pdFAIL;
if( xTimerQueue != NULL )
{
#if( configSUPPORT_STATIC_ALLOCATION == 1 )
{
vApplicationGetTimerTaskMemory( &pxTimerTaskTCBBuffer, &pxTimerTaskStackBuffer, &usTimerTaskStackSize );
}
#endif /* configSUPPORT_STATIC_ALLOCATION */
#if ( INCLUDE_xTimerGetTimerDaemonTaskHandle == 1 )
{
/* Create the timer task, storing its handle in xTimerTaskHandle so
it can be returned by the xTimerGetTimerDaemonTaskHandle() function. */
xReturn = xTaskCreate( prvTimerTask, "Tmr Svc", ( uint16_t ) configTIMER_TASK_STACK_DEPTH, NULL, ( ( UBaseType_t ) configTIMER_TASK_PRIORITY ) | portPRIVILEGE_BIT, &xTimerTaskHandle );
xReturn = xTaskGenericCreate( prvTimerTask, "Tmr Svc", usTimerTaskStackSize, NULL, ( ( UBaseType_t ) configTIMER_TASK_PRIORITY ) | portPRIVILEGE_BIT, &xTimerTaskHandle, pxTimerTaskStackBuffer, pxTimerTaskTCBBuffer, NULL );
}
#else
{
/* Create the timer task without storing its handle. */
xReturn = xTaskCreate( prvTimerTask, "Tmr Svc", ( uint16_t ) configTIMER_TASK_STACK_DEPTH, NULL, ( ( UBaseType_t ) configTIMER_TASK_PRIORITY ) | portPRIVILEGE_BIT, NULL);
xReturn = xTaskGenericCreate( prvTimerTask, "Tmr Svc", usTimerTaskStackSize, NULL, ( ( UBaseType_t ) configTIMER_TASK_PRIORITY ) | portPRIVILEGE_BIT, NULL, pxTimerTaskStackBuffer, pxTimerTaskTCBBuffer, NULL );
}
#endif
}