2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)time.h 8.3 (Berkeley) 1/21/94
46 #include <sys/cdefs.h>
47 #include <sys/_null.h>
48 #include <sys/_types.h>
50 #if __POSIX_VISIBLE > 0 && __POSIX_VISIBLE < 200112 || __BSD_VISIBLE
52 * Frequency of the clock ticks reported by times(). Deprecated - use
53 * sysconf(_SC_CLK_TCK) instead. (Removed in 1003.1-2001.)
58 /* Frequency of the clock ticks reported by clock(). */
59 #define CLOCKS_PER_SEC 128
61 #ifndef _CLOCK_T_DECLARED
62 typedef __clock_t clock_t;
63 #define _CLOCK_T_DECLARED
66 #ifndef _TIME_T_DECLARED
67 typedef __time_t time_t;
68 #define _TIME_T_DECLARED
71 #ifndef _SIZE_T_DECLARED
72 typedef __size_t size_t;
73 #define _SIZE_T_DECLARED
76 #if __POSIX_VISIBLE >= 199309
78 * New in POSIX 1003.1b-1993.
80 #ifndef _CLOCKID_T_DECLARED
81 typedef __clockid_t clockid_t;
82 #define _CLOCKID_T_DECLARED
85 #ifndef _TIMER_T_DECLARED
86 typedef __timer_t timer_t;
87 #define _TIMER_T_DECLARED
90 #include <sys/timespec.h>
91 #endif /* __POSIX_VISIBLE >= 199309 */
93 #if __POSIX_VISIBLE >= 200112
94 #ifndef _PID_T_DECLARED
95 typedef __pid_t pid_t;
96 #define _PID_T_DECLARED
100 /* These macros are also in sys/time.h. */
101 #if !defined(CLOCK_REALTIME) && __POSIX_VISIBLE >= 199506
102 #define CLOCK_REALTIME 0
103 #endif /* !defined(CLOCK_REALTIME) && __POSIX_VISIBLE >= 199506 */
104 #if !defined(CLOCK_VIRTUAL) && __BSD_VISIBLE
105 #define CLOCK_VIRTUAL 1
107 #endif /* !defined(CLOCK_VIRTUAL) && __BSD_VISIBLE */
108 #if !defined(CLOCK_MONOTONIC) && __POSIX_VISIBLE >= 200112
109 #define CLOCK_MONOTONIC 4
110 #define CLOCK_UPTIME 5 /* FreeBSD-specific. */
111 #define CLOCK_UPTIME_PRECISE 7 /* FreeBSD-specific. */
112 #define CLOCK_UPTIME_FAST 8 /* FreeBSD-specific. */
113 #define CLOCK_REALTIME_PRECISE 9 /* FreeBSD-specific. */
114 #define CLOCK_REALTIME_FAST 10 /* FreeBSD-specific. */
115 #define CLOCK_MONOTONIC_PRECISE 11 /* FreeBSD-specific. */
116 #define CLOCK_MONOTONIC_FAST 12 /* FreeBSD-specific. */
117 #define CLOCK_SECOND 13 /* FreeBSD-specific. */
118 #define CLOCK_THREAD_CPUTIME_ID 14
119 #define CLOCK_PROCESS_CPUTIME_ID 15
120 #endif /* !defined(CLOCK_MONOTONIC) && __POSIX_VISIBLE >= 200112 */
123 #define TIMER_RELTIME 0x0 /* relative timer */
125 #if !defined(TIMER_ABSTIME) && __POSIX_VISIBLE >= 199506
126 #define TIMER_ABSTIME 0x1 /* absolute timer */
127 #endif /* !defined(TIMER_ABSTIME) && __POSIX_VISIBLE >= 199506 */
130 int tm_sec; /* seconds after the minute [0-60] */
131 int tm_min; /* minutes after the hour [0-59] */
132 int tm_hour; /* hours since midnight [0-23] */
133 int tm_mday; /* day of the month [1-31] */
134 int tm_mon; /* months since January [0-11] */
135 int tm_year; /* years since 1900 */
136 int tm_wday; /* days since Sunday [0-6] */
137 int tm_yday; /* days since January 1 [0-365] */
138 int tm_isdst; /* Daylight Savings Time flag */
139 long tm_gmtoff; /* offset from UTC in seconds */
140 char *tm_zone; /* timezone abbreviation */
144 extern char *tzname[];
148 char *asctime(const struct tm *);
150 char *ctime(const time_t *);
152 double difftime(time_t, time_t);
154 /* XXX missing: getdate() */
155 struct tm *gmtime(const time_t *);
156 struct tm *localtime(const time_t *);
157 time_t mktime(struct tm *);
158 size_t strftime(char * __restrict, size_t, const char * __restrict,
159 const struct tm * __restrict);
160 time_t time(time_t *);
161 #if __POSIX_VISIBLE >= 200112
163 int timer_create(clockid_t, struct sigevent *__restrict, timer_t *__restrict);
164 int timer_delete(timer_t);
165 int timer_gettime(timer_t, struct itimerspec *);
166 int timer_getoverrun(timer_t);
167 int timer_settime(timer_t, int, const struct itimerspec *__restrict,
168 struct itimerspec *__restrict);
174 #if __POSIX_VISIBLE >= 199309
175 int clock_getres(clockid_t, struct timespec *);
176 int clock_gettime(clockid_t, struct timespec *);
177 int clock_settime(clockid_t, const struct timespec *);
178 int nanosleep(const struct timespec *, struct timespec *);
179 #endif /* __POSIX_VISIBLE >= 199309 */
181 #if __POSIX_VISIBLE >= 200112
182 int clock_getcpuclockid(pid_t, clockid_t *);
183 int clock_nanosleep(clockid_t, int, const struct timespec *, struct timespec *);
186 #if __POSIX_VISIBLE >= 199506
187 char *asctime_r(const struct tm *, char *);
188 char *ctime_r(const time_t *, char *);
189 struct tm *gmtime_r(const time_t *, struct tm *);
190 struct tm *localtime_r(const time_t *, struct tm *);
194 char *strptime(const char * __restrict, const char * __restrict,
195 struct tm * __restrict);
199 char *timezone(int, int); /* XXX XSI conflict */
200 void tzsetwall(void);
201 time_t timelocal(struct tm * const);
202 time_t timegm(struct tm * const);
203 int timer_oshandle_np(timer_t timerid);
204 time_t time2posix(time_t t);
205 time_t posix2time(time_t t);
206 #endif /* __BSD_VISIBLE */
208 #if __POSIX_VISIBLE >= 200809 || defined(_XLOCALE_H_)
209 #include <xlocale/_time.h>
212 #if defined(__BSD_VISIBLE) || __ISO_C_VISIBLE >= 2011 || \
213 (defined(__cplusplus) && __cplusplus >= 201703)
214 #include <sys/_timespec.h>
215 /* ISO/IEC 9899:201x 7.27.2.5 The timespec_get function */
216 #define TIME_UTC 1 /* time elapsed since epoch */
217 int timespec_get(struct timespec *ts, int base);
222 #endif /* !_TIME_H_ */