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Kernel changes:

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Minor change to xQueueGenericReceive() to catch the extreme case of data being placed into a queue between a task timing out and leaving the xQueueGenericReceive() function.
Added xSemaphoreGetCount() macro.


Demo app changes:
Updated countsem.c to test the new xSemaphoreGetCount() macro.
This commit is contained in:
Richard Barry 2016-01-12 15:52:44 +00:00
parent f81575dcee
commit b832d5801f
5 changed files with 53 additions and 19 deletions
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4
FreeRTOS/Source/include/FreeRTOS.h
View file

@ -776,6 +776,10 @@ extern "C" {
#define configSUPPORT_STATIC_ALLOCATION 0
#endif
#if( ( configUSE_RECURSIVE_MUTEXES == 1 ) && ( configUSE_MUTEXES != 1 ) )
#error configUSE_MUTEXES must be set to 1 to use recursive mutexes
#endif
#if( portTICK_TYPE_IS_ATOMIC == 0 )
/* Either variables of tick type cannot be read atomically, or
portTICK_TYPE_IS_ATOMIC was not set - map the critical sections used when

12
FreeRTOS/Source/include/semphr.h
View file

@ -839,6 +839,18 @@ typedef QueueHandle_t SemaphoreHandle_t;
*/
#define xSemaphoreGetMutexHolder( xSemaphore ) xQueueGetMutexHolder( ( xSemaphore ) )
/**
* semphr.h
* <pre>TaskHandle_t xSemaphoreGetCount( SemaphoreHandle_t xMutex );</pre>
*
* If the semaphore is a counting semaphore then xSemaphoreGetCount() returns
* its current count value. If the semaphore is a binary semaphore then
* xSemaphoreGetCount() returns 1 if the semaphore is available, and 0 if the
* semaphore is not available.
*
*/
#define xSemaphoreGetCount( xSemaphore ) uxQueueMessagesWaiting( ( QueueHandle_t ) ( xSemaphore ) )
#endif /* SEMAPHORE_H */