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/*

 *  $Id: clockgettime.c,v 1.2 2001-09-27 11:59:17 chris Exp $

 */

#include <assert.h>

#include <time.h>

#include <errno.h>

#include <rtems/system.h>

#include <rtems/score/isr.h>

#include <rtems/score/thread.h>

#include <rtems/score/tod.h>

#include <rtems/posix/seterr.h>

#include <rtems/posix/time.h>

/*PAGE

 *

 *  14.2.1 Clocks, P1003.1b-1993, p. 263

 */

int clock_gettime(

  clockid_t        clock_id,

  struct timespec *tp

)

{

  ISR_Level      level;

  time_t         seconds;

  long           ticks;

  if ( !tp )

    set_errno_and_return_minus_one( EINVAL );

  switch ( clock_id ) {

    case CLOCK_REALTIME:

      _ISR_Disable( level );

        seconds = _TOD_Seconds_since_epoch;

        ticks   = _TOD_Current.ticks;

      _ISR_Enable( level );

      tp->tv_sec  = seconds + POSIX_TIME_SECONDS_1970_THROUGH_1988;

      tp->tv_nsec = ticks * _TOD_Microseconds_per_tick *

                      TOD_NANOSECONDS_PER_MICROSECOND;

      break;

#ifdef _POSIX_CPUTIME

    case CLOCK_PROCESS_CPUTIME:

      /* don't base this on _Watchdog_Ticks_since_boot--duration is too short*/

      return POSIX_NOT_IMPLEMENTED();

      break;

#endif

#ifdef _POSIX_THREAD_CPUTIME

    case CLOCK_THREAD_CPUTIME:

      return POSIX_NOT_IMPLEMENTED();

      break;

#endif

    default:

      set_errno_and_return_minus_one( EINVAL );

  }

  return 0;

}