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/**
* @file
*
* @brief Scheduler EDF Unblock
* @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>
#include <rtems/score/schedulerimpl.h>
#include <rtems/score/thread.h>
Scheduler_Void_or_thread _Scheduler_EDF_Unblock(
const Scheduler_Control *scheduler,
Thread_Control *the_thread
)
{
Scheduler_EDF_Context *context;
Scheduler_EDF_Node *node;
Priority_Control priority;
bool prepend_it;
context = _Scheduler_EDF_Get_context( scheduler );
node = _Scheduler_EDF_Thread_get_node( the_thread );
priority = _Scheduler_Node_get_priority( &node->Base, &prepend_it );
(void) prepend_it;
node->current_priority = priority;
_Scheduler_EDF_Enqueue( context, node, priority );
/*
* If the thread that was unblocked is more important than the heir,
* then we have a new heir. This may or may not result in a
* context switch.
*
* Normal case:
* If the current thread is preemptible, then we need to do
* a context switch.
* Pseudo-ISR case:
* Even if the thread isn't preemptible, if the new heir is
* a pseudo-ISR system task, we need to do a context switch.
*/
if ( priority < _Thread_Get_priority( _Thread_Heir ) ) {
_Scheduler_Update_heir(
the_thread,
priority == ( SCHEDULER_EDF_PRIO_MSB | PRIORITY_PSEUDO_ISR )
);
}
SCHEDULER_RETURN_VOID_OR_NULL;
}
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