score/src/coremutexseize.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSScoreMutex
0007  *
0008  * @brief This source file contains the implementation of
0009  *   _CORE_mutex_Seize_slow().
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-2006.
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/score/coremuteximpl.h>
0043 #include <rtems/score/statesimpl.h>
0044 #include <rtems/score/thread.h>
0045 #include <rtems/score/watchdog.h>
0046
0047 Status_Control _CORE_mutex_Seize_slow(
0048   CORE_mutex_Control            *the_mutex,
0049   const Thread_queue_Operations *operations,
0050   Thread_Control                *executing,
0051   bool                           wait,
0052   Thread_queue_Context          *queue_context
0053 )
0054 {
0055   if ( wait ) {
0056     _Thread_queue_Context_set_thread_state(
0057       queue_context,
0058       STATES_WAITING_FOR_MUTEX
0059     );
0060     _Thread_queue_Context_set_deadlock_callout(
0061       queue_context,
0062       _Thread_queue_Deadlock_status
0063     );
0064     _Thread_queue_Enqueue(
0065       &the_mutex->Wait_queue.Queue,
0066       operations,
0067       executing,
0068       queue_context
0069     );
0070     return _Thread_Wait_get_status( executing );
0071   } else {
0072     _CORE_mutex_Release( the_mutex, queue_context );
0073     return STATUS_UNAVAILABLE;
0074   }
0075 }