rtems/src/semflush.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSImplClassicSemaphore
0007  *
0008  * @brief This source file contains the implementation of
0009  *   rtems_semaphore_flush().
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/semimpl.h>
0043
0044 rtems_status_code rtems_semaphore_flush( rtems_id id )
0045 {
0046   Semaphore_Control    *the_semaphore;
0047   Thread_queue_Context  queue_context;
0048   uintptr_t             flags;
0049   Semaphore_Variant     variant;
0050
0051   the_semaphore = _Semaphore_Get( id, &queue_context );
0052
0053   if ( the_semaphore == NULL ) {
0054 #if defined(RTEMS_MULTIPROCESSING)
0055     if ( _Semaphore_MP_Is_remote( id ) ) {
0056       return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
0057     }
0058 #endif
0059
0060     return RTEMS_INVALID_ID;
0061   }
0062
0063   _Thread_queue_Acquire_critical(
0064     &the_semaphore->Core_control.Wait_queue,
0065     &queue_context
0066   );
0067   _Thread_queue_Context_set_MP_callout(
0068     &queue_context,
0069     _Semaphore_MP_Send_object_was_deleted
0070   );
0071   flags = _Semaphore_Get_flags( the_semaphore );
0072   variant = _Semaphore_Get_variant( flags );
0073
0074   switch ( variant ) {
0075 #if defined(RTEMS_SMP)
0076     case SEMAPHORE_VARIANT_MRSP:
0077       _Thread_queue_Release(
0078         &the_semaphore->Core_control.Wait_queue,
0079         &queue_context
0080       );
0081       return RTEMS_NOT_DEFINED;
0082 #endif
0083     default:
0084       _Assert(
0085         variant == SEMAPHORE_VARIANT_MUTEX_INHERIT_PRIORITY
0086           || variant == SEMAPHORE_VARIANT_MUTEX_PRIORITY_CEILING
0087           || variant == SEMAPHORE_VARIANT_MUTEX_NO_PROTOCOL
0088           || variant == SEMAPHORE_VARIANT_SIMPLE_BINARY
0089           || variant == SEMAPHORE_VARIANT_COUNTING
0090       );
0091       _Thread_queue_Flush_critical(
0092         &the_semaphore->Core_control.Wait_queue.Queue,
0093         _Semaphore_Get_operations( flags ),
0094         _Thread_queue_Flush_status_unavailable,
0095         &queue_context
0096       );
0097       break;
0098   }
0099
0100   return RTEMS_SUCCESSFUL;
0101 }