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/**
* @file
*
* @brief Scheduler EDF Extract
* @ingroup ScoreScheduler
*/
/*
* Copyright (C) 2011 Petr Benes.
* Copyright (C) 2011 On-Line Applications Research Corporation (OAR).
*
* 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/score/scheduleredfimpl.h>
Priority_Control _Scheduler_EDF_Map_priority(
const Scheduler_Control *scheduler,
Priority_Control priority
)
{
return SCHEDULER_EDF_PRIO_MSB | priority;
}
Priority_Control _Scheduler_EDF_Unmap_priority(
const Scheduler_Control *scheduler,
Priority_Control priority
)
{
return priority & ~SCHEDULER_EDF_PRIO_MSB;
}
Scheduler_Void_or_thread _Scheduler_EDF_Update_priority(
const Scheduler_Control *scheduler,
Thread_Control *the_thread
)
{
Scheduler_EDF_Context *context;
Scheduler_EDF_Node *node;
Priority_Control priority;
bool prepend_it;
if ( !_Thread_Is_ready( the_thread ) ) {
/* Nothing to do */
SCHEDULER_RETURN_VOID_OR_NULL;
}
node = _Scheduler_EDF_Thread_get_node( the_thread );
priority = _Scheduler_Node_get_priority( &node->Base, &prepend_it );
if ( priority == node->current_priority ) {
/* Nothing to do */
SCHEDULER_RETURN_VOID_OR_NULL;
}
if ( ( priority & SCHEDULER_EDF_PRIO_MSB ) != 0 ) {
node->background_priority = priority;
}
node->current_priority = priority;
context = _Scheduler_EDF_Get_context( scheduler );
_Scheduler_EDF_Extract( context, node );
if ( prepend_it ) {
_Scheduler_EDF_Enqueue_first( context, node, priority );
} else {
_Scheduler_EDF_Enqueue( context, node, priority );
}
_Scheduler_EDF_Schedule_body( scheduler, the_thread, false );
SCHEDULER_RETURN_VOID_OR_NULL;
}
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