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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSImplClassicSemaphore
*
* @brief This source file contains the implementation of
* rtems_semaphore_set_priority().
*/
/*
* Copyright (c) 2014 embedded brains GmbH. All rights reserved.
*
* 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/tasksimpl.h>
#include <rtems/score/schedulerimpl.h>
static rtems_status_code _Semaphore_Set_priority(
Semaphore_Control *the_semaphore,
const Scheduler_Control *scheduler,
rtems_task_priority new_priority,
rtems_task_priority *old_priority_p,
Thread_queue_Context *queue_context
)
{
bool valid;
Priority_Control core_priority;
Priority_Control old_priority;
Per_CPU_Control *cpu_self;
Semaphore_Variant variant;
core_priority = _RTEMS_Priority_To_core( scheduler, new_priority, &valid );
if ( new_priority != RTEMS_CURRENT_PRIORITY && !valid ) {
_ISR_lock_ISR_enable( &queue_context->Lock_context.Lock_context );
return RTEMS_INVALID_PRIORITY;
}
_Thread_queue_Context_clear_priority_updates( queue_context );
_Thread_queue_Acquire_critical(
&the_semaphore->Core_control.Wait_queue,
queue_context
);
variant = _Semaphore_Get_variant( _Semaphore_Get_flags( the_semaphore ) );
switch ( variant ) {
case SEMAPHORE_VARIANT_MUTEX_PRIORITY_CEILING:
#if defined(RTEMS_SMP)
if (
scheduler != _CORE_ceiling_mutex_Get_scheduler(
&the_semaphore->Core_control.Mutex
)
) {
_Thread_queue_Release(
&the_semaphore->Core_control.Wait_queue,
queue_context
);
return RTEMS_NOT_DEFINED;
}
#endif
old_priority = _CORE_ceiling_mutex_Get_priority(
&the_semaphore->Core_control.Mutex
);
if ( new_priority != RTEMS_CURRENT_PRIORITY ) {
_CORE_ceiling_mutex_Set_priority(
&the_semaphore->Core_control.Mutex,
core_priority
);
}
break;
#if defined(RTEMS_SMP)
case SEMAPHORE_VARIANT_MRSP:
old_priority = _MRSP_Get_priority(
&the_semaphore->Core_control.MRSP,
scheduler
);
if ( new_priority != RTEMS_CURRENT_PRIORITY ) {
_MRSP_Set_priority(
&the_semaphore->Core_control.MRSP,
scheduler,
core_priority
);
}
break;
#endif
default:
_Assert(
variant == SEMAPHORE_VARIANT_MUTEX_INHERIT_PRIORITY
|| variant == SEMAPHORE_VARIANT_MUTEX_NO_PROTOCOL
|| variant == SEMAPHORE_VARIANT_SIMPLE_BINARY
|| variant == SEMAPHORE_VARIANT_COUNTING
);
_Thread_queue_Release(
&the_semaphore->Core_control.Wait_queue,
queue_context
);
return RTEMS_NOT_DEFINED;
}
cpu_self = _Thread_queue_Dispatch_disable( queue_context );
_Thread_queue_Release(
&the_semaphore->Core_control.Wait_queue,
queue_context
);
_Thread_Priority_update( queue_context );
_Thread_Dispatch_enable( cpu_self );
*old_priority_p = _RTEMS_Priority_From_core( scheduler, old_priority );
return RTEMS_SUCCESSFUL;
}
rtems_status_code rtems_semaphore_set_priority(
rtems_id semaphore_id,
rtems_id scheduler_id,
rtems_task_priority new_priority,
rtems_task_priority *old_priority
)
{
const Scheduler_Control *scheduler;
Semaphore_Control *the_semaphore;
Thread_queue_Context queue_context;
if ( old_priority == NULL ) {
return RTEMS_INVALID_ADDRESS;
}
scheduler = _Scheduler_Get_by_id( scheduler_id );
if ( scheduler == NULL ) {
return RTEMS_INVALID_ID;
}
the_semaphore = _Semaphore_Get( semaphore_id, &queue_context );
if ( the_semaphore == NULL ) {
#if defined(RTEMS_MULTIPROCESSING)
if ( _Semaphore_MP_Is_remote( semaphore_id ) ) {
return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
}
#endif
return RTEMS_INVALID_ID;
}
return _Semaphore_Set_priority(
the_semaphore,
scheduler,
new_priority,
old_priority,
&queue_context
);
}
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