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/**
* @file
*
* @brief Scheduler Priority Unblock
* @ingroup RTEMSScoreScheduler
*/
/*
* 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_Node *node
)
{
Scheduler_priority_Context *context;
Scheduler_priority_Node *the_node;
unsigned int priority;
unsigned int unmapped_priority;
context = _Scheduler_priority_Get_context( scheduler );
the_node = _Scheduler_priority_Node_downcast( node );
priority = (unsigned int ) _Scheduler_Node_get_priority( &the_node->Base );
unmapped_priority = SCHEDULER_PRIORITY_UNMAP( priority );
if ( unmapped_priority != the_node->Ready_queue.current_priority ) {
_Scheduler_priority_Ready_queue_update(
&the_node->Ready_queue,
unmapped_priority,
&context->Bit_map,
&context->Ready[ 0 ]
);
}
_Scheduler_priority_Ready_queue_enqueue(
&the_thread->Object.Node,
&the_node->Ready_queue,
&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 ( priority < _Thread_Get_priority( _Thread_Heir ) ) {
_Scheduler_Update_heir( the_thread, priority == PRIORITY_PSEUDO_ISR );
}
}
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