Notes:

[freertos] / FreeRTOS / Demo / Common / Minimal / QPeek.c

diff --git a/FreeRTOS/Demo/Common/Minimal/QPeek.c b/FreeRTOS/Demo/Common/Minimal/QPeek.c
index 1749203fa6e69be0501d454d835067c54fa9a799..a60d8f0d86239c9a51234e3f12ec41bd40f71856 100644 (file)
--- a/FreeRTOS/Demo/Common/Minimal/QPeek.c
+++ b/FreeRTOS/Demo/Common/Minimal/QPeek.c
@@ -127,21 +127,24 @@ QueueHandle_t xQueue;
        /* Create the queue that we are going to use for the test/demo. */\r
        xQueue = xQueueCreate( qpeekQUEUE_LENGTH, sizeof( uint32_t ) );\r
 \r
-       /* vQueueAddToRegistry() adds the queue to the queue registry, if one is\r
-       in use.  The queue registry is provided as a means for kernel aware\r
-       debuggers to locate queues and has no purpose if a kernel aware debugger\r
-       is not being used.  The call to vQueueAddToRegistry() will be removed\r
-       by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is\r
-       defined to be less than 1. */\r
-       vQueueAddToRegistry( xQueue, "QPeek_Test_Queue" );\r
-\r
-       /* Create the demo tasks and pass it the queue just created.  We are\r
-       passing the queue handle by value so it does not matter that it is declared\r
-       on the stack here. */\r
-       xTaskCreate( prvLowPriorityPeekTask, "PeekL", configMINIMAL_STACK_SIZE, ( void * ) xQueue, qpeekLOW_PRIORITY, NULL );\r
-       xTaskCreate( prvMediumPriorityPeekTask, "PeekM", configMINIMAL_STACK_SIZE, ( void * ) xQueue, qpeekMEDIUM_PRIORITY, &xMediumPriorityTask );\r
-       xTaskCreate( prvHighPriorityPeekTask, "PeekH1", configMINIMAL_STACK_SIZE, ( void * ) xQueue, qpeekHIGH_PRIORITY, &xHighPriorityTask );\r
-       xTaskCreate( prvHighestPriorityPeekTask, "PeekH2", configMINIMAL_STACK_SIZE, ( void * ) xQueue, qpeekHIGHEST_PRIORITY, &xHighestPriorityTask );\r
+       if( xQueue != NULL )\r
+       {\r
+               /* vQueueAddToRegistry() adds the queue to the queue registry, if one is\r
+               in use.  The queue registry is provided as a means for kernel aware\r
+               debuggers to locate queues and has no purpose if a kernel aware debugger\r
+               is not being used.  The call to vQueueAddToRegistry() will be removed\r
+               by the pre-processor if configQUEUE_REGISTRY_SIZE is not defined or is\r
+               defined to be less than 1. */\r
+               vQueueAddToRegistry( xQueue, "QPeek_Test_Queue" );\r
+\r
+               /* Create the demo tasks and pass it the queue just created.  We are\r
+               passing the queue handle by value so it does not matter that it is declared\r
+               on the stack here. */\r
+               xTaskCreate( prvLowPriorityPeekTask, "PeekL", configMINIMAL_STACK_SIZE, ( void * ) xQueue, qpeekLOW_PRIORITY, NULL );\r
+               xTaskCreate( prvMediumPriorityPeekTask, "PeekM", configMINIMAL_STACK_SIZE, ( void * ) xQueue, qpeekMEDIUM_PRIORITY, &xMediumPriorityTask );\r
+               xTaskCreate( prvHighPriorityPeekTask, "PeekH1", configMINIMAL_STACK_SIZE, ( void * ) xQueue, qpeekHIGH_PRIORITY, &xHighPriorityTask );\r
+               xTaskCreate( prvHighestPriorityPeekTask, "PeekH2", configMINIMAL_STACK_SIZE, ( void * ) xQueue, qpeekHIGHEST_PRIORITY, &xHighestPriorityTask );\r
+       }\r
 }\r
 /*-----------------------------------------------------------*/\r
 \r