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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/tasks.h>
#include <rtems/score/schedulerimpl.h>
rtems_status_code rtems_task_set_scheduler(
rtems_id task_id,
rtems_id scheduler_id
)
{
const Scheduler_Control *scheduler;
Thread_Control *the_thread;
ISR_lock_Context lock_context;
ISR_lock_Context state_lock_context;
Per_CPU_Control *cpu_self;
void *lock;
bool ok;
if ( !_Scheduler_Get_by_id( scheduler_id, &scheduler ) ) {
return RTEMS_INVALID_ID;
}
the_thread = _Thread_Get( task_id, &lock_context );
if ( the_thread == NULL ) {
#if defined(RTEMS_MULTIPROCESSING)
if ( _Thread_MP_Is_remote( task_id ) ) {
return RTEMS_ILLEGAL_ON_REMOTE_OBJECT;
}
#endif
return RTEMS_INVALID_ID;
}
cpu_self = _Thread_Dispatch_disable_critical( &lock_context );
_ISR_lock_ISR_enable( &lock_context );
lock = _Thread_Lock_acquire( the_thread, &lock_context );
_Thread_State_acquire_critical( the_thread, &state_lock_context );
ok = _Scheduler_Set( scheduler, the_thread );
_Thread_State_release_critical( the_thread, &state_lock_context );
_Thread_Lock_release( lock, &lock_context );
_Thread_Dispatch_enable( cpu_self );
return ok ? RTEMS_SUCCESSFUL : RTEMS_INCORRECT_STATE;
}
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