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/**
* @file
*
* @brief Returns Highest Priority Thread on Thread Queue
*
* @ingroup ScoreThreadQ
*/
/*
* Thread Queue Handler
*
*
* COPYRIGHT (c) 1989-2008.
* 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.com/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/score/chain.h>
#include <rtems/score/isr.h>
#include <rtems/score/object.h>
#include <rtems/score/states.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
#include <rtems/score/tqdata.h>
Thread_Control *_Thread_queue_First_priority (
Thread_queue_Control *the_thread_queue
)
{
uint32_t index;
for( index=0 ;
index < TASK_QUEUE_DATA_NUMBER_OF_PRIORITY_HEADERS ;
index++ ) {
if ( !_Chain_Is_empty( &the_thread_queue->Queues.Priority[ index ] ) )
return (Thread_Control *) _Chain_First(
&the_thread_queue->Queues.Priority[ index ]
);
}
return NULL;
}
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