1 /* Test program for POSIX clock_* functions.
2 Copyright (C) 2000 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/>. */
25 /* We want to see output immediately. */
26 #define STDOUT_UNBUFFERED
28 /* We expect to run at least 10 seconds. */
32 clock_test (clockid_t cl)
34 struct timespec old_ts;
36 struct timespec waitit;
40 memset (&ts, '\0', sizeof ts);
43 waitit.tv_nsec = 500000000;
45 /* Get and print resolution of the clock. */
46 if (clock_getres (cl, &ts) == 0)
48 if (ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000)
50 printf ("clock %d: nanosecond value of resolution wrong\n", cl);
54 printf ("clock %d: resolution = %ld.%09ld secs\n",
55 cl, ts.tv_sec, ts.tv_nsec);
59 printf ("clock %d: cannot get resolution\n", cl);
63 memset (&ts, '\0', sizeof ts);
64 memset (&old_ts, '\0', sizeof old_ts);
66 /* Next get the current time value a few times. */
67 for (i = 0; i < 10; ++i)
69 if (clock_gettime (cl, &ts) == 0)
71 if (ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000)
73 printf ("clock %d: nanosecond value of time wrong (try %d)\n",
79 printf ("clock %d: time = %ld.%09ld secs\n",
80 cl, ts.tv_sec, ts.tv_nsec);
82 if (memcmp (&ts, &old_ts, sizeof ts) == 0)
84 printf ("clock %d: time hasn't changed (try %d)\n", cl, i);
93 printf ("clock %d: cannot get time (try %d)\n", cl, i);
97 /* Wait a bit before the next iteration. */
98 nanosleep (&waitit, NULL);
110 result = clock_test (CLOCK_REALTIME);
112 if (clock_getcpuclockid (0, &cl) == 0)
113 /* XXX It's not yet a bug when this fails. */
116 printf("CPU clock unavailble, skipping test\n");
120 #define TEST_FUNCTION do_test ()
123 #include "../test-skeleton.c"