/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSImplClassicTask
*
* @brief This source file contains the implementation of
* rtems_task_set_scheduler().
*/
/*
* 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/tasksimpl.h>
#include <rtems/rtems/statusimpl.h>
#include <rtems/score/schedulerimpl.h>
rtems_status_code rtems_task_set_scheduler(
rtems_id task_id,
rtems_id scheduler_id,
rtems_task_priority priority
)
{
const Scheduler_Control *scheduler;
Thread_Control *the_thread;
Thread_queue_Context queue_context;
ISR_lock_Context state_context;
Per_CPU_Control *cpu_self;
bool valid;
Priority_Control core_priority;
Status_Control status;
scheduler = _Scheduler_Get_by_id( scheduler_id );
if ( scheduler == NULL ) {
return RTEMS_INVALID_ID;
}
core_priority = _RTEMS_Priority_To_core( scheduler, priority, &valid );
if ( !valid ) {
return RTEMS_INVALID_PRIORITY;
}
_Thread_queue_Context_initialize( &queue_context );
the_thread = _Thread_Get( task_id, &queue_context.Lock_context.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_queue_Dispatch_disable( &queue_context );
_Thread_Wait_acquire_critical( the_thread, &queue_context );
_Thread_State_acquire_critical( the_thread, &state_context );
status = _Scheduler_Set( scheduler, the_thread, core_priority );
_Thread_State_release_critical( the_thread, &state_context );
_Thread_Wait_release( the_thread, &queue_context );
_Thread_Dispatch_enable( cpu_self );
return _Status_Get( status );
}
