1/*-
2 * Copyright (c) 2016 Maksym Sobolyev <sobomax@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/time.h>
31#include <time.h>
32
33#include "uc_check_time.h"
34
35static const struct timeval max_diff_tv = {.tv_sec = 1, .tv_usec = 0};
36static const struct timespec max_diff_ts = {.tv_sec = 1, .tv_nsec = 0};
37
38int
39uc_check_bintime(const struct bintime *mt)
40{
41	struct timespec bt;
42
43	bintime2timespec(mt, &bt);
44	return (uc_check_timespec_real(&bt));
45}
46
47int
48uc_check_timeval(const struct timeval *bt)
49{
50	struct timeval ct, dt;
51
52	if (gettimeofday(&ct, NULL) < 0)
53		return (-1);
54	timersub(&ct, bt, &dt);
55	if (!timercmp(&dt, &max_diff_tv, <))
56		return (-1);
57
58	return (0);
59}
60
61int
62uc_check_timespec_real(const struct timespec *bt)
63{
64	struct timespec ct;
65
66	if (clock_gettime(CLOCK_REALTIME, &ct) < 0)
67		return (-1);
68	timespecsub(&ct, bt, &ct);
69	if (!timespeccmp(&ct, &max_diff_ts, <))
70		return (-1);
71
72	return (0);
73}
74
75int
76uc_check_timespec_mono(const struct timespec *bt)
77{
78	struct timespec ct;
79
80	if (clock_gettime(CLOCK_MONOTONIC, &ct) < 0)
81		return (-1);
82	timespecsub(&ct, bt, &ct);
83	if (!timespeccmp(&ct, &max_diff_ts, <))
84		return (-1);
85
86	return (0);
87}
88