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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.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 are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include <sys/cdefs.h>
30#include <sys/types.h>
31
32__BEGIN_DECLS
33
34struct tm {
35 int tm_sec; /* Seconds (0-60) */
36 int tm_min; /* Minutes (0-59) */
37 int tm_hour; /* Hours (0-23) */
38 int tm_mday; /* Day of the month (1-31) */
39 int tm_mon; /* Month (0-11) */
40 int tm_year; /* Year - 1900 */
41 int tm_wday; /* Day of the week (0-6, Sunday = 0) */
42 int tm_yday; /* Day in the year (0-365, 1 Jan = 0) */
43 int tm_isdst; /* Daylight saving time */
44};
45
46extern long timezone; /* The difference in seconds between UTC and local time */
47extern long altzone;
48extern char* tzname[2];
49extern int daylight;
50
51typedef uint32_t clock_t;
52typedef int64_t time_t;
53
54struct tm* localtime(const time_t*);
55struct tm* gmtime(const time_t*);
56time_t mktime(struct tm*);
57time_t time(time_t*);
58char* ctime(const time_t*);
59void tzset();
60char* asctime(const struct tm*);
61
62#define CLOCKS_PER_SEC 1000
63clock_t clock();
64
65struct timespec {
66 time_t tv_sec;
67 long tv_nsec;
68};
69
70typedef int clockid_t;
71
72#define CLOCK_REALTIME 0
73#define CLOCK_MONOTONIC 1
74#define TIMER_ABSTIME 99
75
76int clock_gettime(clockid_t, struct timespec*);
77int clock_settime(clockid_t, struct timespec*);
78int clock_nanosleep(clockid_t, int flags, const struct timespec* requested_sleep, struct timespec* remaining_sleep);
79int clock_getres(clockid_t, struct timespec* result);
80struct tm* gmtime_r(const time_t* timep, struct tm* result);
81struct tm* localtime_r(const time_t* timep, struct tm* result);
82
83double difftime(time_t, time_t);
84size_t strftime(char* s, size_t max, const char* format, const struct tm*);
85
86#define difftime(t1, t0) (double)(t1 - t0)
87
88__END_DECLS