Update.
[glibc.git] / rt / tst-clock.c
blob095fca87faa8eec9fa6ab991898e48a309a10434
1 /* Test program for POSIX clock_* functions.
2 Copyright (C) 2000 Free Software Foundation, Inc.
3 Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #include <stdio.h>
21 #include <string.h>
22 #include <time.h>
25 /* We want to see output immediately. */
26 #define STDOUT_UNBUFFERED
28 /* We expect to run at least 10 seconds. */
29 #define TIMEOUT 15
31 static int
32 clock_test (clockid_t cl)
34 struct timespec old_ts;
35 struct timespec ts;
36 struct timespec waitit;
37 int result = 0;
38 int i;
40 memset (&ts, '\0', sizeof ts);
42 waitit.tv_sec = 0;
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);
51 result = 1;
53 else
54 printf ("clock %d: resolution = %ld.%09ld secs\n",
55 cl, ts.tv_sec, ts.tv_nsec);
57 else
59 printf ("clock %d: cannot get resolution\n", cl);
60 result = 1;
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",
74 cl, i);
75 result = 1;
77 else
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);
85 result = 1;
87 old_ts = ts;
91 else
93 printf ("clock %d: cannot get time (try %d)\n", cl, i);
94 result = 1;
97 /* Wait a bit before the next iteration. */
98 nanosleep (&waitit, NULL);
101 return result;
104 static int
105 do_test (void)
107 clockid_t cl;
108 int result;
110 result = clock_test (CLOCK_REALTIME);
112 if (clock_getcpuclockid (0, &cl) == 0)
113 /* XXX It's not yet a bug when this fails. */
114 clock_test (cl);
116 return result;
118 #define TEST_FUNCTION do_test ()
121 #include "../test-skeleton.c"