1 /* Test program for POSIX clock_* functions.
2 Copyright (C) 2000-2018 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
26 /* We want to see output immediately. */
27 #define STDOUT_UNBUFFERED
30 clock_test (clockid_t cl)
32 struct timespec old_ts;
34 struct timespec waitit;
38 memset (&ts, '\0', sizeof ts);
41 waitit.tv_nsec = 500000000;
43 /* Get and print resolution of the clock. */
44 if (clock_getres (cl, &ts) == 0)
46 if (ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000)
48 printf ("clock %d: nanosecond value of resolution wrong\n", cl);
52 printf ("clock %d: resolution = %jd.%09jd secs\n",
53 cl, (intmax_t) ts.tv_sec, (intmax_t) ts.tv_nsec);
57 printf ("clock %d: cannot get resolution\n", cl);
61 memset (&ts, '\0', sizeof ts);
62 memset (&old_ts, '\0', sizeof old_ts);
64 /* Next get the current time value a few times. */
65 for (i = 0; i < 10; ++i)
67 if (clock_gettime (cl, &ts) == 0)
69 if (ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000)
71 printf ("clock %d: nanosecond value of time wrong (try %d)\n",
77 printf ("clock %d: time = %jd.%09jd secs\n",
78 cl, (intmax_t) ts.tv_sec, (intmax_t) ts.tv_nsec);
80 if (memcmp (&ts, &old_ts, sizeof ts) == 0)
82 printf ("clock %d: time hasn't changed (try %d)\n", cl, i);
91 printf ("clock %d: cannot get time (try %d)\n", cl, i);
95 /* Wait a bit before the next iteration. */
96 nanosleep (&waitit, NULL);
108 result = clock_test (CLOCK_REALTIME);
110 if (clock_getcpuclockid (0, &cl) == 0)
111 /* XXX It's not yet a bug when this fails. */
114 printf("CPU clock unavailble, skipping test\n");
118 #define TEST_FUNCTION do_test ()
121 #include "../test-skeleton.c"