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/**
* @file
*
* @brief Scheduler Priority Yield
* @ingroup ScoreScheduler
*/
/*
* 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>
#include <rtems/score/isr.h>
#include <rtems/score/threadimpl.h>
void _Scheduler_priority_Yield(
const Scheduler_Control *scheduler,
Thread_Control *the_thread
)
{
Scheduler_priority_Node *node = _Scheduler_priority_Node_get( the_thread );
Chain_Control *ready_chain = node->Ready_queue.ready_chain;
ISR_Level level;
(void) scheduler;
_ISR_Disable( level );
if ( !_Chain_Has_only_one_node( ready_chain ) ) {
_Chain_Extract_unprotected( &the_thread->Object.Node );
_Chain_Append_unprotected( ready_chain, &the_thread->Object.Node );
_ISR_Flash( level );
if ( _Thread_Is_heir( the_thread ) )
_Thread_Heir = (Thread_Control *) _Chain_First( ready_chain );
_Thread_Dispatch_necessary = true;
}
else if ( !_Thread_Is_heir( the_thread ) )
_Thread_Dispatch_necessary = true;
_ISR_Enable( level );
}
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