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/**
* @file
*
* @brief Scheduler Priority Unblock
* @ingroup ScoreScheduler
*/
/*
* Scheduler Handler
*
* Copyright (C) 2010 Gedare Bloom.
* 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/schedulerpriorityimpl.h>
void _Scheduler_priority_Unblock (
const Scheduler_Control *scheduler,
Thread_Control *the_thread
)
{
Scheduler_priority_Context *context =
_Scheduler_priority_Get_context( scheduler );
_Scheduler_priority_Ready_queue_enqueue( the_thread, &context->Bit_map );
/* TODO: flash critical section? */
/*
* 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 ( the_thread->current_priority < _Thread_Heir->current_priority ) {
_Thread_Heir = the_thread;
if ( _Thread_Executing->is_preemptible ||
the_thread->current_priority == 0 )
_Thread_Dispatch_necessary = true;
}
}
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