posix/src/mqueueunlink.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup POSIX_MQUEUE Message Queues
0007  *
0008  * @brief Remove a Message Queue
0009  */
0010
0011 /*
0012  *  COPYRIGHT (c) 1989-2014.
0013  *  On-Line Applications Research Corporation (OAR).
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #ifdef HAVE_CONFIG_H
0038 #include "config.h"
0039 #endif
0040
0041 #include <rtems/posix/mqueueimpl.h>
0042
0043 /*
0044  *  15.2.2 Remove a Message Queue, P1003.1b-1993, p. 276
0045  */
0046
0047 int mq_unlink(
0048   const char *name
0049 )
0050 {
0051   POSIX_Message_queue_Control *the_mq;
0052   Objects_Get_by_name_error    error;
0053   Thread_queue_Context         queue_context;
0054
0055   _Objects_Allocator_lock();
0056
0057   the_mq = _POSIX_Message_queue_Get_by_name( name, NULL, &error );
0058   if ( the_mq == NULL ) {
0059     _Objects_Allocator_unlock();
0060     rtems_set_errno_and_return_minus_one( _POSIX_Get_by_name_error( error ) );
0061   }
0062
0063   _POSIX_Message_queue_Namespace_remove( the_mq );
0064
0065   _CORE_message_queue_Acquire( &the_mq->Message_queue, &queue_context );
0066
0067   the_mq->linked = false;
0068   _POSIX_Message_queue_Delete( the_mq, &queue_context );
0069
0070   _Objects_Allocator_unlock();
0071   return 0;
0072 }