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/*

 *  Clock Manager

 *

 *  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: clockget.c,v 1.2 2001-09-27 11:59:19 chris Exp $

 */

#include <rtems/system.h>

#include <rtems/rtems/status.h>

#include <rtems/rtems/clock.h>

#include <rtems/score/isr.h>

#include <rtems/score/thread.h>

#include <rtems/score/tod.h>

#include <rtems/score/watchdog.h>

/*PAGE

 *

 *  rtems_clock_get

 *

 *  This directive returns the current date and time.  If the time has

 *  not been set by a tm_set then an error is returned.

 *

 *  Input parameters:

 *    option      - which value to return

 *    time_buffer - pointer to output buffer (a time and date structure

 *                  or an interval)

 *

 *  Output parameters:

 *    time_buffer      - output filled in

 *    RTEMS_SUCCESSFUL - if successful

 *    error code       - if unsuccessful

 */

rtems_status_code rtems_clock_get(

  rtems_clock_get_options  option,

  void                    *time_buffer

)

{

  ISR_Level      level;

  rtems_interval tmp;

  switch ( option ) {

    case RTEMS_CLOCK_GET_TOD:

      if ( !_TOD_Is_set )

        return RTEMS_NOT_DEFINED;

      *(rtems_time_of_day *)time_buffer = _TOD_Current;

      return RTEMS_SUCCESSFUL;

    case RTEMS_CLOCK_GET_SECONDS_SINCE_EPOCH:

      if ( !_TOD_Is_set )

        return RTEMS_NOT_DEFINED;

      *(rtems_interval *)time_buffer = _TOD_Seconds_since_epoch;

      return RTEMS_SUCCESSFUL;

    case RTEMS_CLOCK_GET_TICKS_SINCE_BOOT:

      *(rtems_interval *)time_buffer = _Watchdog_Ticks_since_boot;

      return RTEMS_SUCCESSFUL;

    case RTEMS_CLOCK_GET_TICKS_PER_SECOND:

      *(rtems_interval *)time_buffer = _TOD_Ticks_per_second;

      return RTEMS_SUCCESSFUL;

    case RTEMS_CLOCK_GET_TIME_VALUE:

      if ( !_TOD_Is_set )

        return RTEMS_NOT_DEFINED;

      _ISR_Disable( level );

        ((rtems_clock_time_value *)time_buffer)->seconds =

          _TOD_Seconds_since_epoch;

        tmp = _TOD_Current.ticks;

      _ISR_Enable( level );

      tmp *= _TOD_Microseconds_per_tick;

      ((rtems_clock_time_value *)time_buffer)->microseconds = tmp;

      return RTEMS_SUCCESSFUL;

  }

  return RTEMS_INTERNAL_ERROR;   /* should never get here */

}