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75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/* Copyright (C) 2000-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Kaz Kylheku <kaz@ashi.footprints.net>.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <pthread.h>
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#include <time.h>
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#include "posix-timer.h"
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/* Get current value of timer TIMERID and store it in VLAUE. */
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int
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timer_gettime (timer_t timerid, struct itimerspec *value)
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{
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struct timer_node *timer;
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struct timespec now, expiry;
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int retval = -1, armed = 0, valid;
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clock_t clock = 0;
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pthread_mutex_lock (&__timer_mutex);
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timer = timer_id2ptr (timerid);
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valid = timer_valid (timer);
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if (valid) {
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armed = timer->armed;
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expiry = timer->expirytime;
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clock = timer->clock;
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value->it_interval = timer->value.it_interval;
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}
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pthread_mutex_unlock (&__timer_mutex);
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if (valid)
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{
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if (armed)
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{
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__clock_gettime (clock, &now);
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if (timespec_compare (&now, &expiry) < 0)
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timespec_sub (&value->it_value, &expiry, &now);
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else
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{
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value->it_value.tv_sec = 0;
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value->it_value.tv_nsec = 0;
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}
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}
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else
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{
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value->it_value.tv_sec = 0;
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value->it_value.tv_nsec = 0;
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}
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retval = 0;
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}
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else
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__set_errno (EINVAL);
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return retval;
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}
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