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/* Test for timerfd related functions
Copyright (C) 2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <time.h>
#include <support/check.h>
#include <support/xunistd.h>
#include <support/timespec.h>
#include <sys/time.h>
#include <sys/timerfd.h>
static int
do_test (void)
{
struct itimerspec settings = { { 2, 0 }, { 2, 0 } };
struct itimerspec val1, val2;
int fd, ret;
fd = timerfd_create (CLOCK_REALTIME, 0);
if (fd < 0)
FAIL_EXIT1 ("*** timerfd_create failed: %m");
/* Set the timer. */
ret = timerfd_settime (fd, 0, &settings, NULL);
if (ret != 0)
FAIL_EXIT1 ("*** timerfd_settime failed: %m\n");
/* Read the timer just before sleep. */
ret = timerfd_gettime (fd, &val1);
if (ret != 0)
FAIL_EXIT1 ("*** timerfd_gettime failed: %m\n");
/* Sleep for 1 second. */
ret = usleep (1000000);
if (ret != 0)
FAIL_EXIT1 ("*** usleep failed: %m\n");
/* Read the timer just after sleep. */
ret = timerfd_gettime (fd, &val2);
if (ret != 0)
FAIL_EXIT1 ("*** timerfd_gettime failed: %m\n");
/* Check difference between timerfd_gettime calls. */
struct timespec r = timespec_sub (val2.it_value, val1.it_value);
TEST_COMPARE (support_timespec_check_in_range
((struct timespec) { 1, 0 }, r, 1.0, 1.5), 0);
return 0;
}
#include <support/test-driver.c>
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