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/* Test program for POSIX clock_* functions.
Copyright (C) 2000-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://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
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"
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