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/*
* Copyright (c) 2014 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/semimpl.h>
#include <rtems/rtems/attrimpl.h>
#include <rtems/rtems/tasksimpl.h>
#include <rtems/score/schedulerimpl.h>
static rtems_status_code _Semaphore_Set_priority(
Semaphore_Control *the_semaphore,
rtems_id scheduler_id,
rtems_task_priority new_priority,
rtems_task_priority *old_priority_p
)
{
rtems_status_code sc;
rtems_attribute attribute_set = the_semaphore->attribute_set;
rtems_task_priority old_priority;
new_priority = _RTEMS_tasks_Priority_to_Core( new_priority );
#if defined(RTEMS_SMP)
if ( _Attributes_Is_multiprocessor_resource_sharing( attribute_set ) ) {
MRSP_Control *mrsp = &the_semaphore->Core_control.mrsp;
uint32_t scheduler_index = _Scheduler_Get_index_by_id( scheduler_id );
old_priority = _MRSP_Get_ceiling_priority( mrsp, scheduler_index );
if ( new_priority != RTEMS_CURRENT_PRIORITY ) {
_MRSP_Set_ceiling_priority( mrsp, scheduler_index, new_priority );
}
sc = RTEMS_SUCCESSFUL;
} else
#endif
if ( _Attributes_Is_priority_ceiling( attribute_set ) ) {
CORE_mutex_Control *mutex = &the_semaphore->Core_control.mutex;
old_priority = mutex->Attributes.priority_ceiling;
if ( new_priority != RTEMS_CURRENT_PRIORITY ) {
mutex->Attributes.priority_ceiling = new_priority;
}
sc = RTEMS_SUCCESSFUL;
} else {
old_priority = 0;
sc = RTEMS_NOT_DEFINED;
}
*old_priority_p = _RTEMS_tasks_Priority_from_Core( old_priority );
_Objects_Put( &the_semaphore->Object );
return sc;
}
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
)
{
Semaphore_Control *the_semaphore;
Objects_Locations location;
if ( new_priority != RTEMS_CURRENT_PRIORITY &&
!_RTEMS_tasks_Priority_is_valid( new_priority ) ) {
return RTEMS_INVALID_PRIORITY;
}
if ( old_priority == NULL ) {
return RTEMS_INVALID_ADDRESS;
}
if ( !_Scheduler_Is_id_valid( scheduler_id ) ) {
return RTEMS_INVALID_ID;
}
the_semaphore = _Semaphore_Get( semaphore_id, &location );
switch ( location ) {
case OBJECTS_LOCAL:
return _Semaphore_Set_priority(
the_semaphore,
scheduler_id,
new_priority,
old_priority
);
#if defined(RTEMS_MULTIPROCESSING)
case OBJECTS_REMOTE:
_Thread_Dispatch();
return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
#endif
case OBJECTS_ERROR:
break;
}
return RTEMS_INVALID_ID;
}
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