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Change the way the critical sections are handled within interrupts so the critical sections can be nested.

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This commit is contained in:
Richard Barry 2008-05-19 19:16:57 +00:00
parent 4b9fe1e28a
commit 5a2790a998
1 changed files with 7 additions and 7 deletions
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12
Source/queue.c
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@ -690,9 +690,7 @@ xTimeOutType xTimeOut;
{
if( pxQueue->uxQueueType == queueQUEUE_IS_MUTEX )
{
portENTER_CRITICAL();
vTaskPriorityInherit( ( void * ) pxQueue->pxMutexHolder );
portEXIT_CRITICAL();
}
}
#endif
@ -802,13 +800,14 @@ xTimeOutType xTimeOut;
signed portBASE_TYPE xQueueGenericSendFromISR( xQueueHandle pxQueue, const void * const pvItemToQueue, signed portBASE_TYPE *pxHigherPriorityTaskWoken, portBASE_TYPE xCopyPosition )
{
signed portBASE_TYPE xReturn;
unsigned portBASE_TYPE uxSavedInterruptStatus;
/* Similar to xQueueGenericSend, except we don't block if there is no room
in the queue. Also we don't directly wake a task that was blocked on a
queue read, instead we return a flag to say whether a context switch is
required or not (i.e. has a task with a higher priority than us been woken
by this post). */
portSET_INTERRUPT_MASK_FROM_ISR();
uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
{
if( pxQueue->uxMessagesWaiting < pxQueue->uxLength )
{
@ -845,7 +844,7 @@ signed portBASE_TYPE xReturn;
xReturn = errQUEUE_FULL;
}
}
portCLEAR_INTERRUPT_MASK_FROM_ISR();
portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
return xReturn;
}
@ -1007,8 +1006,9 @@ signed portCHAR *pcOriginalReadPosition;
signed portBASE_TYPE xQueueReceiveFromISR( xQueueHandle pxQueue, void * const pvBuffer, signed portBASE_TYPE *pxTaskWoken )
{
signed portBASE_TYPE xReturn;
unsigned portBASE_TYPE uxSavedInterruptStatus;
portSET_INTERRUPT_MASK_FROM_ISR();
uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
{
/* We cannot block from an ISR, so check there is data available. */
if( pxQueue->uxMessagesWaiting > ( unsigned portBASE_TYPE ) 0 )
@ -1048,7 +1048,7 @@ signed portBASE_TYPE xReturn;
traceQUEUE_RECEIVE_FROM_ISR_FAILED( pxQueue );
}
}
portCLEAR_INTERRUPT_MASK_FROM_ISR();
portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
return xReturn;
}