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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSImplClassicSemaphore
*
* @brief This source file contains the implementation of
* rtems_semaphore_release().
*/
/*
* COPYRIGHT (c) 1989-2014.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/semimpl.h>
#include <rtems/rtems/statusimpl.h>
rtems_status_code rtems_semaphore_release( rtems_id id )
{
Semaphore_Control *the_semaphore;
Thread_queue_Context queue_context;
Thread_Control *executing;
uintptr_t flags;
Semaphore_Variant variant;
Status_Control status;
the_semaphore = _Semaphore_Get( id, &queue_context );
if ( the_semaphore == NULL ) {
#if defined(RTEMS_MULTIPROCESSING)
return _Semaphore_MP_Release( id );
#else
return RTEMS_INVALID_ID;
#endif
}
executing = _Thread_Executing;
_Thread_queue_Context_set_MP_callout(
&queue_context,
_Semaphore_Core_mutex_mp_support
);
flags = _Semaphore_Get_flags( the_semaphore );
variant = _Semaphore_Get_variant( flags );
switch ( variant ) {
case SEMAPHORE_VARIANT_MUTEX_INHERIT_PRIORITY:
status = _CORE_recursive_mutex_Surrender(
&the_semaphore->Core_control.Mutex.Recursive,
CORE_MUTEX_TQ_PRIORITY_INHERIT_OPERATIONS,
executing,
&queue_context
);
break;
case SEMAPHORE_VARIANT_MUTEX_PRIORITY_CEILING:
status = _CORE_ceiling_mutex_Surrender(
&the_semaphore->Core_control.Mutex,
executing,
&queue_context
);
break;
case SEMAPHORE_VARIANT_MUTEX_NO_PROTOCOL:
status = _CORE_recursive_mutex_Surrender(
&the_semaphore->Core_control.Mutex.Recursive,
_Semaphore_Get_operations( flags ),
executing,
&queue_context
);
break;
case SEMAPHORE_VARIANT_SIMPLE_BINARY:
status = _CORE_semaphore_Surrender(
&the_semaphore->Core_control.Semaphore,
_Semaphore_Get_operations( flags ),
1,
&queue_context
);
_Assert(
status == STATUS_SUCCESSFUL
|| status == STATUS_MAXIMUM_COUNT_EXCEEDED
);
(void) status;
status = STATUS_SUCCESSFUL;
break;
#if defined(RTEMS_SMP)
case SEMAPHORE_VARIANT_MRSP:
status = _MRSP_Surrender(
&the_semaphore->Core_control.MRSP,
executing,
&queue_context
);
break;
#endif
default:
_Assert( variant == SEMAPHORE_VARIANT_COUNTING );
status = _CORE_semaphore_Surrender(
&the_semaphore->Core_control.Semaphore,
_Semaphore_Get_operations( flags ),
UINT32_MAX,
&queue_context
);
break;
}
return _Status_Get( status );
}
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