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/**
* @file
*
* @brief Function closes the Message Queue
* @ingroup POSIXAPI
*/
/*
* NOTE: The structure of the routines is identical to that of POSIX
* Message_queues to leave the option of having unnamed message
* queues at a future date. They are currently not part of the
* POSIX standard but unnamed message_queues are. This is also
* the reason for the apparently unnecessary tracking of
* the process_shared attribute. [In addition to the fact that
* it would be trivial to add pshared to the mq_attr structure
* and have process private message queues.]
*
* This code ignores the O_RDONLY/O_WRONLY/O_RDWR flag at open
* time.
*
* COPYRIGHT (c) 1989-2008.
* 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 <stdarg.h>
#include <pthread.h>
#include <limits.h>
#include <errno.h>
#include <fcntl.h>
#include <mqueue.h>
#include <rtems/system.h>
#include <rtems/score/watchdog.h>
#include <rtems/seterr.h>
#include <rtems/posix/mqueueimpl.h>
#include <rtems/posix/time.h>
/*
*
* 15.2.2 Close a Message Queue, P1003.1b-1993, p. 275
*/
int mq_close(
mqd_t mqdes
)
{
POSIX_Message_queue_Control *the_mq;
POSIX_Message_queue_Control_fd *the_mq_fd;
Objects_Locations location;
_Objects_Allocator_lock();
the_mq_fd = _POSIX_Message_queue_Get_fd( mqdes, &location );
if ( location == OBJECTS_LOCAL ) {
/* OBJECTS_LOCAL:
*
* First update the actual message queue to reflect this descriptor
* being disassociated. This may result in the queue being really
* deleted.
*/
the_mq = the_mq_fd->Queue;
the_mq->open_count -= 1;
_POSIX_Message_queue_Delete( the_mq );
/*
* Now close this file descriptor.
*/
_Objects_Close(
&_POSIX_Message_queue_Information_fds, &the_mq_fd->Object );
_POSIX_Message_queue_Free_fd( the_mq_fd );
_Objects_Put( &the_mq_fd->Object );
_Objects_Allocator_unlock();
return 0;
}
_Objects_Allocator_unlock();
/*
* OBJECTS_REMOTE:
* OBJECTS_ERROR:
*/
rtems_set_errno_and_return_minus_one( EBADF );
}
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