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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [rtems/] [src/] [timerfirewhen.c] - Blame information for rev 173

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1 30 unneback
/*
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 *  Timer Manager
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 *
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 *
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: timerfirewhen.c,v 1.2 2001-09-27 11:59:19 chris Exp $
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 */
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#include <rtems/system.h>
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#include <rtems/rtems/status.h>
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#include <rtems/rtems/support.h>
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#include <rtems/score/object.h>
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#include <rtems/score/thread.h>
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#include <rtems/rtems/timer.h>
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#include <rtems/score/tod.h>
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#include <rtems/score/watchdog.h>
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/*PAGE
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 *
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 *  rtems_timer_fire_when
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 *
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 *  This directive allows a thread to start a timer.
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 *
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 *  Input parameters:
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 *    id        - timer id
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 *    wall_time - time of day to fire timer
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 *    routine   - routine to schedule
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 *
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 *  Output parameters:
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 *    RTEMS_SUCCESSFUL - if successful
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 *    error code        - if unsuccessful
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 */
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rtems_status_code rtems_timer_fire_when(
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  Objects_Id                          id,
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  rtems_time_of_day                  *wall_time,
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  rtems_timer_service_routine_entry   routine,
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  void                               *user_data
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)
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{
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  Timer_Control       *the_timer;
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  Objects_Locations    location;
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  rtems_interval       seconds;
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  if ( !_TOD_Is_set )
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    return RTEMS_NOT_DEFINED;
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  if ( !_TOD_Validate( wall_time ) )
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    return RTEMS_INVALID_CLOCK;
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  seconds = _TOD_To_seconds( wall_time );
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  if ( seconds <= _TOD_Seconds_since_epoch )
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    return RTEMS_INVALID_CLOCK;
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  the_timer = _Timer_Get( id, &location );
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  switch ( location ) {
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    case OBJECTS_REMOTE:            /* should never return this */
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      return RTEMS_INTERNAL_ERROR;
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    case OBJECTS_ERROR:
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      return RTEMS_INVALID_ID;
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    case OBJECTS_LOCAL:
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      (void) _Watchdog_Remove( &the_timer->Ticker );
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      the_timer->the_class = TIMER_TIME_OF_DAY;
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      _Watchdog_Initialize( &the_timer->Ticker, routine, id, user_data );
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      _Watchdog_Insert_seconds(
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         &the_timer->Ticker,
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         seconds - _TOD_Seconds_since_epoch
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       );
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      _Thread_Enable_dispatch();
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      return RTEMS_SUCCESSFUL;
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  }
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  return RTEMS_INTERNAL_ERROR;   /* unreached - only to remove warnings */
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}

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