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/*
* CORE Message Queue Handler
*
* DESCRIPTION:
*
* This package is the implementation of the CORE Message Queue Handler.
* This core object provides task synchronization and communication functions
* via messages passed to queue objects.
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#include <rtems/system.h>
#include <rtems/score/chain.h>
#include <rtems/score/isr.h>
#include <rtems/score/object.h>
#include <rtems/score/coremsg.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
#include <rtems/score/wkspace.h>
#if defined(RTEMS_MULTIPROCESSING)
#include <rtems/score/mpci.h>
#endif
/*PAGE
*
* _CORE_message_queue_Flush_waiting_threads
*
* This function flushes the message_queue's task wait queue. The number
* of messages flushed from the queue is returned.
*
* Input parameters:
* the_message_queue - the message_queue to be flushed
*
* Output parameters:
* returns - the number of messages flushed from the queue
*/
void _CORE_message_queue_Flush_waiting_threads(
CORE_message_queue_Control *the_message_queue
)
{
/* XXX this is not supported for global message queues */
/*
* IF there are no pending messages,
* THEN threads may be blocked waiting to RECEIVE a message,
*
* IF the pending message queue is full
* THEN threads may be blocked waiting to SEND a message
*
* But in either case, we will return "unsatisfied nowait"
* to indicate that the blocking condition was not satisfied
* and that the blocking state was canceled.
*/
_Thread_queue_Flush(
&the_message_queue->Wait_queue,
NULL,
CORE_MESSAGE_QUEUE_STATUS_UNSATISFIED_NOWAIT
);
}
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