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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;
int retval = -1;
pthread_mutex_lock (&__timer_mutex);
timer = timer_id2ptr (timerid);
if (timer == NULL && !timer->inuse)
/* Invalid timer ID or the timer is not in use. */
errno = EINVAL;
else
{
value->it_interval = timer->value.it_interval;
if (timer->armed)
{
pthread_mutex_unlock (&__timer_mutex);
clock_gettime (timer->clock, &now);
pthread_mutex_lock (&__timer_mutex);
timespec_sub (&value->it_value, &timer->expirytime, &now);
}
else
{
value->it_value.tv_sec = 0;
value->it_value.tv_nsec = 0;
}
retval = 0;
}
pthread_mutex_lock (&__timer_mutex);
return retval;
}
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