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glibc/rt/tst-clock.c
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/* Test program for POSIX clock_* functions. | |
Copyright (C) 2000-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <stdio.h> | |
#include <string.h> | |
#include <time.h> | |
#include <stdint.h> | |
/* We want to see output immediately. */ | |
#define STDOUT_UNBUFFERED | |
/* We expect to run at least 10 seconds. */ | |
#define TIMEOUT 15 | |
static int | |
clock_test (clockid_t cl) | |
{ | |
struct timespec old_ts; | |
struct timespec ts; | |
struct timespec waitit; | |
int result = 0; | |
int i; | |
memset (&ts, '\0', sizeof ts); | |
waitit.tv_sec = 0; | |
waitit.tv_nsec = 500000000; | |
/* Get and print resolution of the clock. */ | |
if (clock_getres (cl, &ts) == 0) | |
{ | |
if (ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000) | |
{ | |
printf ("clock %d: nanosecond value of resolution wrong\n", cl); | |
result = 1; | |
} | |
else | |
printf ("clock %d: resolution = %jd.%09jd secs\n", | |
cl, (intmax_t) ts.tv_sec, (intmax_t) ts.tv_nsec); | |
} | |
else | |
{ | |
printf ("clock %d: cannot get resolution\n", cl); | |
result = 1; | |
} | |
memset (&ts, '\0', sizeof ts); | |
memset (&old_ts, '\0', sizeof old_ts); | |
/* Next get the current time value a few times. */ | |
for (i = 0; i < 10; ++i) | |
{ | |
if (clock_gettime (cl, &ts) == 0) | |
{ | |
if (ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000) | |
{ | |
printf ("clock %d: nanosecond value of time wrong (try %d)\n", | |
cl, i); | |
result = 1; | |
} | |
else | |
{ | |
printf ("clock %d: time = %jd.%09jd secs\n", | |
cl, (intmax_t) ts.tv_sec, (intmax_t) ts.tv_nsec); | |
if (memcmp (&ts, &old_ts, sizeof ts) == 0) | |
{ | |
printf ("clock %d: time hasn't changed (try %d)\n", cl, i); | |
result = 1; | |
old_ts = ts; | |
} | |
} | |
} | |
else | |
{ | |
printf ("clock %d: cannot get time (try %d)\n", cl, i); | |
result = 1; | |
} | |
/* Wait a bit before the next iteration. */ | |
nanosleep (&waitit, NULL); | |
} | |
return result; | |
} | |
static int | |
do_test (void) | |
{ | |
clockid_t cl; | |
int result; | |
result = clock_test (CLOCK_REALTIME); | |
if (clock_getcpuclockid (0, &cl) == 0) | |
/* XXX It's not yet a bug when this fails. */ | |
clock_test (cl); | |
else | |
printf("CPU clock unavailble, skipping test\n"); | |
return result; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |