jcs.org
jcs's openbsd hax
openbsd
1#ifndef TIMESTAMP_H
2#define TIMESTAMP_H
3
4/* $OpenBSD: timestamp.h,v 1.12 2024/04/09 15:08:21 cheloha Exp $ */
5
6/*
7 * Copyright (c) 2001 Marc Espie.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
22 * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31/* This module handles time stamps on files in a relatively high-level way.
32 * Most of the interface is achieved through inlineable code.
33 *
34 * ts_set_out_of_date(t): set up t so that it is out-of-date.
35 * b = is_out_of_date(t): check whether t is out-of-date.
36 * ts_set_from_stat(s, t): grab date out of stat(2) buffer.
37 * b = is_strictly_before(t1, t2):
38 * check whether t1 is before t2.
39 * ts_set_from_time_t(d, t): create timestamp from time_t.
40 */
41
42#define Init_Timestamp() clock_gettime(CLOCK_REALTIME, &starttime)
43
44#define TMIN (sizeof(time_t) == sizeof(int32_t) ? INT32_MIN : INT64_MIN)
45#define ts_set_out_of_date(t) (t).tv_sec = TMIN, (t).tv_nsec = 0
46#define is_out_of_date(t) ((t).tv_sec == TMIN && (t).tv_nsec == 0)
47
48#define ts_set_from_stat(s, t) \
49do { \
50 (t) = (s).st_mtim; \
51 if (is_out_of_date(t)) \
52 (t).tv_nsec++; \
53} while (0)
54#define is_strictly_before(t1, t2) timespeccmp(&(t1), &(t2), <)
55#define ts_set_from_time_t(d, t) \
56do { \
57 (t).tv_sec = d; \
58 (t).tv_nsec = 0; \
59 if (is_out_of_date(t)) \
60 (t).tv_nsec++; \
61} while (0)
62
63extern struct timespec starttime; /* The time at the start
64 * of this whole process */
65extern char *time_to_string(struct timespec *);
66
67
68#endif