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/**
* @file
*
* @ingroup RTEMSImplClassicTask
*
* @brief This source file contains the implementation of
* rtems_task_get_priority().
*/
/*
* Copyright (c) 2016 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/rtems/tasksimpl.h>
#include <rtems/score/schedulerimpl.h>
#include <rtems/score/threadimpl.h>
rtems_status_code rtems_task_get_priority(
rtems_id task_id,
rtems_id scheduler_id,
rtems_task_priority *priority
)
{
Thread_Control *the_thread;
Thread_queue_Context queue_context;
const Scheduler_Control *scheduler;
const Scheduler_Node *scheduler_node;
Priority_Control core_priority;
if ( priority == NULL ) {
return RTEMS_INVALID_ADDRESS;
}
scheduler = _Scheduler_Get_by_id( scheduler_id );
if ( scheduler == NULL ) {
return RTEMS_INVALID_ID;
}
_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;
}
scheduler_node = _Thread_Scheduler_get_node_by_index(
the_thread,
_Scheduler_Get_index( scheduler )
);
_Thread_Wait_acquire_critical( the_thread, &queue_context );
#if defined(RTEMS_SMP)
if ( _Priority_Is_empty( &scheduler_node->Wait.Priority ) ) {
_Thread_Wait_release( the_thread, &queue_context );
return RTEMS_NOT_DEFINED;
}
#endif
core_priority = _Priority_Get_priority( &scheduler_node->Wait.Priority );
_Thread_Wait_release( the_thread, &queue_context );
*priority = _RTEMS_Priority_From_core( scheduler, core_priority );
return RTEMS_SUCCESSFUL;
}
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