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/**
* @file
*
* @brief RTEMS Message Queue Receive
* @ingroup ClassicMessageQueue
*/
/*
* COPYRIGHT (c) 1989-2014.
* 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.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/messageimpl.h>
#include <rtems/rtems/optionsimpl.h>
#include <rtems/rtems/statusimpl.h>
THREAD_QUEUE_OBJECT_ASSERT( Message_queue_Control, message_queue.Wait_queue );
rtems_status_code rtems_message_queue_receive(
rtems_id id,
void *buffer,
size_t *size,
rtems_option option_set,
rtems_interval timeout
)
{
Message_queue_Control *the_message_queue;
Thread_queue_Context queue_context;
Thread_Control *executing;
Status_Control status;
if ( buffer == NULL ) {
return RTEMS_INVALID_ADDRESS;
}
if ( size == NULL ) {
return RTEMS_INVALID_ADDRESS;
}
the_message_queue = _Message_queue_Get( id, &queue_context );
if ( the_message_queue == NULL ) {
#if defined(RTEMS_MULTIPROCESSING)
return _Message_queue_MP_Receive( id, buffer, size, option_set, timeout );
#else
return RTEMS_INVALID_ID;
#endif
}
_CORE_message_queue_Acquire_critical(
&the_message_queue->message_queue,
&queue_context
);
executing = _Thread_Executing;
_Thread_queue_Context_set_enqueue_timeout_ticks( &queue_context, timeout );
status = _CORE_message_queue_Seize(
&the_message_queue->message_queue,
executing,
buffer,
size,
!_Options_Is_no_wait( option_set ),
&queue_context
);
return _Status_Get( status );
}
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