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/*

 *  clocksettime.c,v 1.4 2002/01/04 18:28:24 joel Exp

 */

#if HAVE_CONFIG_H

#include "config.h"

#endif

#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/seterr.h>

#include <rtems/posix/time.h>

/*PAGE

 *

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

 */

int clock_settime(

  clockid_t              clock_id,

  const struct timespec *tp

)

{

  struct tm         split_time;

  TOD_Control       tod;

  Watchdog_Interval seconds;

  assert( tp );

  switch ( clock_id ) {

    case CLOCK_REALTIME:

      (void) gmtime_r( &tp->tv_sec, &split_time );

      /*

       *  Convert the tm structure format to that used by the TOD Handler

       *

       *  NOTE: TOD Handler does not honor leap seconds.

       */

      tod.year   = split_time.tm_year + 1900;  /* RHS is years since 1900 */

      tod.month  = split_time.tm_mon + 1;      /* RHS uses 0-11 */

      tod.day    = split_time.tm_mday;

      tod.hour   = split_time.tm_hour;

      tod.minute = split_time.tm_min;

      tod.second = split_time.tm_sec;  /* RHS allows 0-61 for leap seconds */

      tod.ticks  = (tp->tv_nsec / TOD_NANOSECONDS_PER_MICROSECOND) /

                      _TOD_Microseconds_per_tick;

      if ( !_TOD_Validate( &tod ) )

        rtems_set_errno_and_return_minus_one( EINVAL );

      /*

       *  We can't use the tp->tv_sec field because it is based on

       *  a different EPOCH.

       */

      seconds = _TOD_To_seconds( &tod );

      _Thread_Disable_dispatch();

        _TOD_Set( &tod, seconds );

      _Thread_Enable_dispatch();

      break;

#ifdef _POSIX_CPUTIME

    case CLOCK_PROCESS_CPUTIME:

      return POSIX_NOT_IMPLEMENTED();

      break;

#endif

#ifdef _POSIX_THREAD_CPUTIME

    case CLOCK_THREAD_CPUTIME:

      return POSIX_NOT_IMPLEMENTED();

      break;

#endif

    default:

      rtems_set_errno_and_return_minus_one( EINVAL );

  }

  return 0;

}