1/* Copyright (C) 2003-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <stdio.h>
20#include <unistd.h>
21#include <sys/time.h>
22#include <time.h>
23#include <intprops.h>
24#include <support/support.h>
25#include <support/check.h>
26
27/* Test that clock_nanosleep() does sleep. */
28static void
29clock_nanosleep_test (void)
30{
31 /* Current time. */
32 struct timeval tv1;
33 gettimeofday (tv: &tv1, NULL);
34
35 struct timespec ts = { 1, 0 };
36 TEMP_FAILURE_RETRY (clock_nanosleep (CLOCK_REALTIME, 0, &ts, &ts));
37
38 /* At least one second must have passed. */
39 struct timeval tv2;
40 gettimeofday (tv: &tv2, NULL);
41
42 tv2.tv_sec -= tv1.tv_sec;
43 tv2.tv_usec -= tv1.tv_usec;
44 if (tv2.tv_usec < 0)
45 --tv2.tv_sec;
46
47 TEST_VERIFY (tv2.tv_sec >= 1);
48}
49
50static void
51clock_nanosleep_large_timeout (void)
52{
53 support_create_timer (sec: 0, nsec: 100000000, false, NULL);
54 struct timespec ts = { TYPE_MAXIMUM (time_t), 0 };
55 int r = clock_nanosleep (CLOCK_REALTIME, flags: 0, req: &ts, NULL);
56 TEST_VERIFY (r == EINTR || r == EOVERFLOW);
57}
58
59static int
60do_test (void)
61{
62 clock_nanosleep_test ();
63 clock_nanosleep_large_timeout ();
64 return 0;
65}
66
67#include <support/test-driver.c>
68

source code of glibc/time/tst-clock_nanosleep.c