BaseType_t xMessageBufferReset( MessageBufferHandle_t xMessageBuffer );
Resets a message buffer to its initial, empty, state. Any data that was in
the message buffer is discarded. A message buffer can only be reset if there
are no tasks blocked waiting to either send to or receive from the message
Message buffer functionality is enabled by including the FreeRTOS/source/stream_buffer.c
source file in the build (as message buffers use stream buffers).
The handle of the message buffer being reset.
If the message buffer is reset then pdPASS is returned. If there was
a task blocked waiting to send to or read from the message buffer then the
message buffer will not be reset and pdFAIL is returned.
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