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Fix bug when xQueueOverwrite() and xQueueOverwrite() from ISR are used to overwrite items in two queues that are part of the same set.

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Minor queue optimisations.
pull/8/head
Richard Barry 5 years ago
parent e5708b38e9
commit 9491af1fd7
1 changed files with 35 additions and 26 deletions
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61
FreeRTOS/Source/queue.c
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@ -203,7 +203,7 @@ static void prvCopyDataFromQueue( Queue_t * const pxQueue, void * const pvBuffer
* Checks to see if a queue is a member of a queue set, and if so, notifies
* the queue set that the queue contains data.
*/
static BaseType_t prvNotifyQueueSetContainer( const Queue_t * const pxQueue, const BaseType_t xCopyPosition ) PRIVILEGED_FUNCTION;
static BaseType_t prvNotifyQueueSetContainer( const Queue_t * const pxQueue ) PRIVILEGED_FUNCTION;
#endif
/*
@ -373,17 +373,10 @@ Queue_t * const pxQueue = xQueue;
configASSERT( uxQueueLength > ( UBaseType_t ) 0 );
if( uxItemSize == ( UBaseType_t ) 0 )
{
/* There is not going to be a queue storage area. */
xQueueSizeInBytes = ( size_t ) 0;
}
else
{
/* Allocate enough space to hold the maximum number of items that
can be in the queue at any time. */
xQueueSizeInBytes = ( size_t ) ( uxQueueLength * uxItemSize ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
}
/* Allocate enough space to hold the maximum number of items that
can be in the queue at any time. It is valid for uxItemSize to be
zero in the case the queue is used as a semaphore. */
xQueueSizeInBytes = ( size_t ) ( uxQueueLength * uxItemSize ); /*lint !e961 MISRA exception as the casts are only redundant for some ports. */
/* Allocate the queue and storage area. Justification for MISRA
deviation as follows: pvPortMalloc() always ensures returned memory
@ -777,7 +770,7 @@ Queue_t * const pxQueue = xQueue;
#if ( configUSE_QUEUE_SETS == 1 )
{
UBaseType_t uxPreviousMessagesWaiting = pxQueue->uxMessagesWaiting;
const UBaseType_t uxPreviousMessagesWaiting = pxQueue->uxMessagesWaiting;
xYieldRequired = prvCopyDataToQueue( pxQueue, pvItemToQueue, xCopyPosition );
@ -790,7 +783,7 @@ Queue_t * const pxQueue = xQueue;
in the queue has not changed. */
mtCOVERAGE_TEST_MARKER();
}
else if( prvNotifyQueueSetContainer( pxQueue, xCopyPosition ) != pdFALSE )
else if( prvNotifyQueueSetContainer( pxQueue ) != pdFALSE )
{
/* The queue is a member of a queue set, and posting
to the queue set caused a higher priority task to
@ -993,22 +986,31 @@ Queue_t * const pxQueue = xQueue;
traceQUEUE_SEND_FROM_ISR( pxQueue );
/* Semaphores use xQueueGiveFromISR(), so pxQueue will not be a
semaphore or mutex. That means prvCopyDataToQueue() cannot result
in a task disinheriting a priority and prvCopyDataToQueue() can be
called here even though the disinherit function does not check if
the scheduler is suspended before accessing the ready lists. */
( void ) prvCopyDataToQueue( pxQueue, pvItemToQueue, xCopyPosition );
/* The event list is not altered if the queue is locked. This will
be done when the queue is unlocked later. */
if( cTxLock == queueUNLOCKED )
{
#if ( configUSE_QUEUE_SETS == 1 )
{
const UBaseType_t uxPreviousMessagesWaiting = pxQueue->uxMessagesWaiting;
/* Semaphores use xQueueGiveFromISR(), so pxQueue will not be a
semaphore or mutex. That means prvCopyDataToQueue() cannot result
in a task disinheriting a priority and prvCopyDataToQueue() can be
called here even though the disinherit function does not check if
the scheduler is suspended before accessing the ready lists. */
( void ) prvCopyDataToQueue( pxQueue, pvItemToQueue, xCopyPosition );
if( pxQueue->pxQueueSetContainer != NULL )
{
if( prvNotifyQueueSetContainer( pxQueue, xCopyPosition ) != pdFALSE )
if( ( xCopyPosition == queueOVERWRITE ) && ( uxPreviousMessagesWaiting != ( UBaseType_t ) 0 ) )
{
/* Do not notify the queue set as an existing item
was overwritten in the queue so the number of items
in the queue has not changed. */
mtCOVERAGE_TEST_MARKER();
}
else if( prvNotifyQueueSetContainer( pxQueue ) != pdFALSE )
{
/* The queue is a member of a queue set, and posting
to the queue set caused a higher priority task to
@ -1057,6 +1059,13 @@ Queue_t * const pxQueue = xQueue;
}
#else /* configUSE_QUEUE_SETS */
{
/* Semaphores use xQueueGiveFromISR(), so pxQueue will not be a
semaphore or mutex. That means prvCopyDataToQueue() cannot result
in a task disinheriting a priority and prvCopyDataToQueue() can be
called here even though the disinherit function does not check if
the scheduler is suspended before accessing the ready lists. */
( void ) prvCopyDataToQueue( pxQueue, pvItemToQueue, xCopyPosition );
if( listLIST_IS_EMPTY( &( pxQueue->xTasksWaitingToReceive ) ) == pdFALSE )
{
if( xTaskRemoveFromEventList( &( pxQueue->xTasksWaitingToReceive ) ) != pdFALSE )
@ -1173,7 +1182,7 @@ Queue_t * const pxQueue = xQueue;
{
if( pxQueue->pxQueueSetContainer != NULL )
{
if( prvNotifyQueueSetContainer( pxQueue, queueSEND_TO_BACK ) != pdFALSE )
if( prvNotifyQueueSetContainer( pxQueue ) != pdFALSE )
{
/* The semaphore is a member of a queue set, and
posting to the queue set caused a higher priority
@ -2185,7 +2194,7 @@ static void prvUnlockQueue( Queue_t * const pxQueue )
{
if( pxQueue->pxQueueSetContainer != NULL )
{
if( prvNotifyQueueSetContainer( pxQueue, queueSEND_TO_BACK ) != pdFALSE )
if( prvNotifyQueueSetContainer( pxQueue ) != pdFALSE )
{
/* The queue is a member of a queue set, and posting to
the queue set caused a higher priority task to unblock.
@ -2875,7 +2884,7 @@ Queue_t * const pxQueue = xQueue;
#if ( configUSE_QUEUE_SETS == 1 )
static BaseType_t prvNotifyQueueSetContainer( const Queue_t * const pxQueue, const BaseType_t xCopyPosition )
static BaseType_t prvNotifyQueueSetContainer( const Queue_t * const pxQueue )
{
Queue_t *pxQueueSetContainer = pxQueue->pxQueueSetContainer;
BaseType_t xReturn = pdFALSE;
@ -2892,7 +2901,7 @@ Queue_t * const pxQueue = xQueue;
traceQUEUE_SEND( pxQueueSetContainer );
/* The data copied is the handle of the queue that contains data. */
xReturn = prvCopyDataToQueue( pxQueueSetContainer, &pxQueue, xCopyPosition );
xReturn = prvCopyDataToQueue( pxQueueSetContainer, &pxQueue, queueSEND_TO_BACK );
if( cTxLock == queueUNLOCKED )
{

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