message queue adaptation for ISRs

osal/FreeRTOS/MessageQueue.cpp

@@ -124,6 +124,9 @@ ReturnValue_t MessageQueue::sendMessageFromMessageQueue(MessageQueueId_t sendTo,
                 reinterpret_cast<const void*>(message->getBuffer()), 0);
     }
     else {
+        // If the call context is from an interrupt,
+        // request a context switch if a higher priority task
+        // was blocked by the interrupt.
         BaseType_t xHigherPriorityTaskWoken = pdFALSE;
         result = xQueueSendFromISR(reinterpret_cast<void*>(sendTo),
                 reinterpret_cast<const void*>(message->getBuffer()),