xref: /freebsd/include/time.h (revision 6472ac3d8a86336899b6cfb789a4cd9897e3fab5)
1 /*
2  * Copyright (c) 1989, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  * (c) UNIX System Laboratories, Inc.
5  * All or some portions of this file are derived from material licensed
6  * to the University of California by American Telephone and Telegraph
7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8  * the permission of UNIX System Laboratories, Inc.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  *
34  *	@(#)time.h	8.3 (Berkeley) 1/21/94
35  */
36 
37 /*
38  * $FreeBSD$
39  */
40 
41 #ifndef _TIME_H_
42 #define	_TIME_H_
43 
44 #include <sys/cdefs.h>
45 #include <sys/_null.h>
46 #include <sys/_types.h>
47 
48 #if __POSIX_VISIBLE > 0 && __POSIX_VISIBLE < 200112 || __BSD_VISIBLE
49 /*
50  * Frequency of the clock ticks reported by times().  Deprecated - use
51  * sysconf(_SC_CLK_TCK) instead.  (Removed in 1003.1-2001.)
52  */
53 #define	CLK_TCK		128
54 #endif
55 
56 /* Frequency of the clock ticks reported by clock().  */
57 #define	CLOCKS_PER_SEC	128
58 
59 #ifndef _CLOCK_T_DECLARED
60 typedef	__clock_t	clock_t;
61 #define	_CLOCK_T_DECLARED
62 #endif
63 
64 #ifndef _TIME_T_DECLARED
65 typedef	__time_t	time_t;
66 #define	_TIME_T_DECLARED
67 #endif
68 
69 #ifndef _SIZE_T_DECLARED
70 typedef	__size_t	size_t;
71 #define	_SIZE_T_DECLARED
72 #endif
73 
74 #if __POSIX_VISIBLE >= 199309
75 /*
76  * New in POSIX 1003.1b-1993.
77  */
78 #ifndef _CLOCKID_T_DECLARED
79 typedef	__clockid_t	clockid_t;
80 #define	_CLOCKID_T_DECLARED
81 #endif
82 
83 #ifndef _TIMER_T_DECLARED
84 typedef	__timer_t	timer_t;
85 #define	_TIMER_T_DECLARED
86 #endif
87 
88 #include <sys/timespec.h>
89 #endif /* __POSIX_VISIBLE >= 199309 */
90 
91 /* These macros are also in sys/time.h. */
92 #if !defined(CLOCK_REALTIME) && __POSIX_VISIBLE >= 200112
93 #define CLOCK_REALTIME	0
94 #ifdef __BSD_VISIBLE
95 #define CLOCK_VIRTUAL	1
96 #define CLOCK_PROF	2
97 #endif
98 #define CLOCK_MONOTONIC	4
99 #define CLOCK_UPTIME	5		/* FreeBSD-specific. */
100 #define CLOCK_UPTIME_PRECISE	7	/* FreeBSD-specific. */
101 #define CLOCK_UPTIME_FAST	8	/* FreeBSD-specific. */
102 #define CLOCK_REALTIME_PRECISE	9	/* FreeBSD-specific. */
103 #define CLOCK_REALTIME_FAST	10	/* FreeBSD-specific. */
104 #define CLOCK_MONOTONIC_PRECISE	11	/* FreeBSD-specific. */
105 #define CLOCK_MONOTONIC_FAST	12	/* FreeBSD-specific. */
106 #define CLOCK_SECOND	13		/* FreeBSD-specific. */
107 #define CLOCK_THREAD_CPUTIME_ID	14
108 #endif /* !defined(CLOCK_REALTIME) && __POSIX_VISIBLE >= 200112 */
109 
110 #if !defined(TIMER_ABSTIME) && __POSIX_VISIBLE >= 200112
111 #if __BSD_VISIBLE
112 #define TIMER_RELTIME	0x0	/* relative timer */
113 #endif
114 #define TIMER_ABSTIME	0x1	/* absolute timer */
115 #endif /* !defined(TIMER_ABSTIME) && __POSIX_VISIBLE >= 200112 */
116 
117 struct tm {
118 	int	tm_sec;		/* seconds after the minute [0-60] */
119 	int	tm_min;		/* minutes after the hour [0-59] */
120 	int	tm_hour;	/* hours since midnight [0-23] */
121 	int	tm_mday;	/* day of the month [1-31] */
122 	int	tm_mon;		/* months since January [0-11] */
123 	int	tm_year;	/* years since 1900 */
124 	int	tm_wday;	/* days since Sunday [0-6] */
125 	int	tm_yday;	/* days since January 1 [0-365] */
126 	int	tm_isdst;	/* Daylight Savings Time flag */
127 	long	tm_gmtoff;	/* offset from UTC in seconds */
128 	char	*tm_zone;	/* timezone abbreviation */
129 };
130 
131 #if __POSIX_VISIBLE
132 extern char *tzname[];
133 #endif
134 
135 __BEGIN_DECLS
136 char *asctime(const struct tm *);
137 clock_t clock(void);
138 char *ctime(const time_t *);
139 double difftime(time_t, time_t);
140 /* XXX missing: getdate() */
141 struct tm *gmtime(const time_t *);
142 struct tm *localtime(const time_t *);
143 time_t mktime(struct tm *);
144 size_t strftime(char * __restrict, size_t, const char * __restrict,
145     const struct tm * __restrict);
146 time_t time(time_t *);
147 #if __POSIX_VISIBLE >= 200112
148 struct sigevent;
149 int timer_create(clockid_t, struct sigevent *__restrict, timer_t *__restrict);
150 int timer_delete(timer_t);
151 int timer_gettime(timer_t, struct itimerspec *);
152 int timer_getoverrun(timer_t);
153 int timer_settime(timer_t, int, const struct itimerspec *__restrict,
154 	struct itimerspec *__restrict);
155 #endif
156 #if __POSIX_VISIBLE
157 void tzset(void);
158 #endif
159 
160 #if __POSIX_VISIBLE >= 199309
161 int clock_getres(clockid_t, struct timespec *);
162 int clock_gettime(clockid_t, struct timespec *);
163 int clock_settime(clockid_t, const struct timespec *);
164 /* XXX missing: clock_nanosleep() */
165 int nanosleep(const struct timespec *, struct timespec *);
166 #endif /* __POSIX_VISIBLE >= 199309 */
167 
168 #if __POSIX_VISIBLE >= 199506
169 char *asctime_r(const struct tm *, char *);
170 char *ctime_r(const time_t *, char *);
171 struct tm *gmtime_r(const time_t *, struct tm *);
172 struct tm *localtime_r(const time_t *, struct tm *);
173 #endif
174 
175 #if __XSI_VISIBLE
176 char *strptime(const char * __restrict, const char * __restrict,
177     struct tm * __restrict);
178 #endif
179 
180 #if __BSD_VISIBLE
181 char *timezone(int, int);	/* XXX XSI conflict */
182 void tzsetwall(void);
183 time_t timelocal(struct tm * const);
184 time_t timegm(struct tm * const);
185 #endif /* __BSD_VISIBLE */
186 __END_DECLS
187 
188 #endif /* !_TIME_H_ */
189