Kernel code:

+ Added mtCOVERAGE_TEST_DELAY() macro to facilitate getting better code coverage during testing.
+ Update prvNotifyQueueSetContainer() so it does not call xTaskRemoveFromEventList() if it is called from an interrupt, and the queue is locked.

Demo apps:
Added QueueSetPolling.c/h demo/test functions.

FreeRTOS/Source/include/FreeRTOS.h

@@ -719,6 +719,10 @@ extern "C" {
 	#define mtCOVERAGE_TEST_MARKER()
 #endif
 
+#ifndef mtCOVERAGE_TEST_DELAY
+	#define mtCOVERAGE_TEST_DELAY()
+#endif
+
 #ifndef portASSERT_IF_IN_ISR
 	#define portASSERT_IF_IN_ISR()
 #endif