rtems/src/msgqurgent.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSImplClassicMessage
0007  *
0008  * @brief This source file contains the implementation of
0009  *   rtems_message_queue_urgent().
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-2014.
0014  *  On-Line Applications Research Corporation (OAR).
0015  *
0016  * Redistribution and use in source and binary forms, with or without
0017  * modification, are permitted provided that the following conditions
0018  * are met:
0019  * 1. Redistributions of source code must retain the above copyright
0020  *    notice, this list of conditions and the following disclaimer.
0021  * 2. Redistributions in binary form must reproduce the above copyright
0022  *    notice, this list of conditions and the following disclaimer in the
0023  *    documentation and/or other materials provided with the distribution.
0024  *
0025  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0026  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0027  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0028  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0029  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0030  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0031  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0032  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0033  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0034  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0035  * POSSIBILITY OF SUCH DAMAGE.
0036  */
0037
0038 #ifdef HAVE_CONFIG_H
0039 #include "config.h"
0040 #endif
0041
0042 #include <rtems/rtems/messageimpl.h>
0043 #include <rtems/rtems/statusimpl.h>
0044
0045 rtems_status_code rtems_message_queue_urgent(
0046   rtems_id    id,
0047   const void *buffer,
0048   size_t      size
0049 )
0050 {
0051   Message_queue_Control *the_message_queue;
0052   Thread_queue_Context   queue_context;
0053   Status_Control         status;
0054
0055   if ( buffer == NULL ) {
0056     return RTEMS_INVALID_ADDRESS;
0057   }
0058
0059   the_message_queue = _Message_queue_Get( id, &queue_context );
0060
0061   if ( the_message_queue == NULL ) {
0062 #if defined(RTEMS_MULTIPROCESSING)
0063     return _Message_queue_MP_Urgent( id, buffer, size );
0064 #else
0065     return RTEMS_INVALID_ID;
0066 #endif
0067   }
0068
0069   _CORE_message_queue_Acquire_critical(
0070     &the_message_queue->message_queue,
0071     &queue_context
0072   );
0073   _Thread_queue_Context_set_MP_callout(
0074     &queue_context,
0075     _Message_queue_Core_message_queue_mp_support
0076   );
0077   status = _CORE_message_queue_Urgent(
0078     &the_message_queue->message_queue,
0079     buffer,
0080     size,
0081     false,   /* sender does not block */
0082     &queue_context
0083   );
0084   return _Status_Get( status );
0085 }