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/*

 *  COPYRIGHT (c) 1989-1999.

 *  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.OARcorp.com/rtems/license.html.

 *

 *  $Id: rot_rdq.c,v 1.2 2001-09-27 11:59:13 chris Exp $

 */

#include <itron.h>

#include <rtems/score/thread.h>

#include <rtems/score/userext.h>

#include <rtems/score/wkspace.h>

#include <rtems/score/apiext.h>

#include <rtems/score/sysstate.h>

#include <rtems/itron/task.h>

/*

 *  rot_rdq - Rotate Tasks on the Ready Queue

 */

ER rot_rdq(

  PRI tskpri

)

{

  PRI priority;

  if (( tskpri <= 0 ) || ( tskpri >= 256 ))

    return E_PAR;

  _Thread_Disable_dispatch();

  /*

   * Yield of processor will rotate the queue for this processor.

   */

  priority = _ITRON_Task_Core_to_Priority(_Thread_Executing->current_priority);

  if ( priority == tskpri )

    _Thread_Yield_processor();

  else {

    _Thread_Rotate_Ready_Queue( _ITRON_Task_Core_to_Priority( tskpri ) );

  }

  _Thread_Enable_dispatch();

  return E_OK;

}