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/* Copyright (C) 2000 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Kaz Kylheku <kaz@ashi.footprints.net>.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Library General Public License as

   published by the Free Software Foundation; either version 2 of the

   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public

   License along with the GNU C Library; see the file COPYING.LIB.  If not,

   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#include <errno.h>

#include <pthread.h>

#include <time.h>

#include "posix-timer.h"

/* Get current value of timer TIMERID and store it in VLAUE.  */

int

timer_gettime (timerid, value)

     timer_t timerid;

     struct itimerspec *value;

{

  struct timer_node *timer;

  struct timespec now, expiry;

  int retval = -1, armed = 0, valid;

  clock_t clock = 0;

  pthread_mutex_lock (&__timer_mutex);

  timer = timer_id2ptr (timerid);

  valid = timer_valid (timer);

  if (valid) {

    armed = timer->armed;

    expiry = timer->expirytime;

    clock = timer->clock;

    value->it_interval = timer->value.it_interval;

  }

  pthread_mutex_unlock (&__timer_mutex);

  if (valid)

    {

      if (armed)

        {

          clock_gettime (clock, &now);

          timespec_sub (&value->it_value, &expiry, &now);

        }

      else

        {

          value->it_value.tv_sec = 0;

          value->it_value.tv_nsec = 0;

        }

      retval = 0;

    }

  else

    __set_errno (EINVAL);

  return retval;

}