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/* $OpenBSD: test_time_skew.c,v 1.1 2020/07/06 13:33:06 pirofti Exp $ */
/*
* Copyright (c) 2020 Paul Irofti <paul@irofti.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/time.h>
#include <assert.h>
#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#define ASSERT_EQ(a, b) assert((a) == (b))
#define ASSERT_NE(a, b) assert((a) != (b))
void
check()
{
struct timespec tp1, tp2, tout;
tout.tv_sec = 0;
tout.tv_nsec = 100000;
ASSERT_EQ(0, clock_gettime(CLOCK_MONOTONIC, &tp1));
nanosleep(&tout, NULL);
ASSERT_EQ(0, clock_gettime(CLOCK_MONOTONIC, &tp2));
/* tp1 should never be larger than tp2 */
ASSERT_NE(1, timespeccmp(&tp1, &tp2, >));
}
int
main(void)
{
int i;
for (i = 0; i < 1000; i++)
check();
return 0;
}
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