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Don't free xQueue->ucHead if it is NULL.

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This commit is contained in:
Richard Barry 2013-12-24 10:47:52 +00:00
parent a3c2f45116
commit 6179690dc9
1 changed files with 5 additions and 3 deletions
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8
FreeRTOS/Source/queue.c
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@ -126,13 +126,12 @@ typedef struct QueueDefinition
{ {
signed char *pcHead; /*< Points to the beginning of the queue storage area. */ signed char *pcHead; /*< Points to the beginning of the queue storage area. */
signed char *pcTail; /*< Points to the byte at the end of the queue storage area. Once more byte is allocated than necessary to store the queue items, this is used as a marker. */ signed char *pcTail; /*< Points to the byte at the end of the queue storage area. Once more byte is allocated than necessary to store the queue items, this is used as a marker. */
signed char *pcWriteTo; /*< Points to the free next place in the storage area. */ signed char *pcWriteTo; /*< Points to the free next place in the storage area. */
union /* Use of a union is an exception to the coding standard to ensure two mutually exclusive structure members don't appear simultaneously (wasting RAM). */ union /* Use of a union is an exception to the coding standard to ensure two mutually exclusive structure members don't appear simultaneously (wasting RAM). */
{ {
signed char *pcReadFrom; /*< Points to the last place that a queued item was read from when the structure is used as a queue. */ signed char *pcReadFrom; /*< Points to the last place that a queued item was read from when the structure is used as a queue. */
unsigned portBASE_TYPE uxRecursiveCallCount;/*< Maintains a count of the numebr of times a recursive mutex has been recursively 'taken' when the structure is used as a mutex. */ unsigned portBASE_TYPE uxRecursiveCallCount;/*< Maintains a count of the number of times a recursive mutex has been recursively 'taken' when the structure is used as a mutex. */
} u; } u;
xList xTasksWaitingToSend; /*< List of tasks that are blocked waiting to post onto this queue. Stored in priority order. */ xList xTasksWaitingToSend; /*< List of tasks that are blocked waiting to post onto this queue. Stored in priority order. */
@ -1544,7 +1543,10 @@ xQUEUE * const pxQueue = ( xQUEUE * ) xQueue;
vQueueUnregisterQueue( pxQueue ); vQueueUnregisterQueue( pxQueue );
} }
#endif #endif
vPortFree( pxQueue->pcHead ); if( pxQueue->pcHead != NULL )
{
vPortFree( pxQueue->pcHead );
}
vPortFree( pxQueue ); vPortFree( pxQueue );
} }
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/