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5692abd13d
This change adds new test to assess functionality of timerfd_* functions. It creates new timer (operates on its file descriptor) and checks if time before and after sleep is between expected values.
66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
/* Test for timerfd related functions
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Copyright (C) 2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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
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License as published by the Free Software Foundation; either
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version 2.1 of the 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; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <time.h>
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#include <support/check.h>
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#include <support/xunistd.h>
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#include <support/timespec.h>
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#include <sys/time.h>
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#include <sys/timerfd.h>
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static int
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do_test (void)
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{
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struct itimerspec settings = { { 2, 0 }, { 2, 0 } };
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struct itimerspec val1, val2;
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int fd, ret;
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fd = timerfd_create (CLOCK_REALTIME, 0);
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if (fd < 0)
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FAIL_EXIT1 ("*** timerfd_create failed: %m");
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/* Set the timer. */
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ret = timerfd_settime (fd, 0, &settings, NULL);
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if (ret != 0)
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FAIL_EXIT1 ("*** timerfd_settime failed: %m\n");
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/* Read the timer just before sleep. */
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ret = timerfd_gettime (fd, &val1);
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if (ret != 0)
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FAIL_EXIT1 ("*** timerfd_gettime failed: %m\n");
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/* Sleep for 1 second. */
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ret = usleep (1000000);
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if (ret != 0)
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FAIL_EXIT1 ("*** usleep failed: %m\n");
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/* Read the timer just after sleep. */
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ret = timerfd_gettime (fd, &val2);
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if (ret != 0)
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FAIL_EXIT1 ("*** timerfd_gettime failed: %m\n");
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/* Check difference between timerfd_gettime calls. */
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struct timespec r = timespec_sub (val2.it_value, val1.it_value);
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TEST_COMPARE (support_timespec_check_in_range
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((struct timespec) { 1, 0 }, r, 1.0, 1.5), 0);
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return 0;
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}
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#include <support/test-driver.c>
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