1/*	$NetBSD: time.h,v 1.48 2022/10/23 15:43:40 jschauma Exp $	*/
  2
  3/*
  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.
 11 *
 12 * Redistribution and use in source and binary forms, with or without
 13 * modification, are permitted provided that the following conditions
 14 * are met:
 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.
 23 *
 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
 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 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
 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 34 * SUCH DAMAGE.
 35 *
 36 *	@(#)time.h	8.3 (Berkeley) 1/21/94
 37 */
 38
 39#ifndef _TIME_H_
 40#define	_TIME_H_
 41
 42#include <sys/cdefs.h>
 43#include <sys/featuretest.h>
 44#include <machine/ansi.h>
 45
 46#include <sys/null.h>
 47
 48#ifdef	_BSD_CLOCK_T_
 49typedef	_BSD_CLOCK_T_	clock_t;
 50#undef	_BSD_CLOCK_T_
 51#endif
 52
 53#ifdef	_BSD_TIME_T_
 54typedef	_BSD_TIME_T_	time_t;
 55#undef	_BSD_TIME_T_
 56#endif
 57
 58#ifdef	_BSD_SIZE_T_
 59typedef	_BSD_SIZE_T_	size_t;
 60#undef	_BSD_SIZE_T_
 61#endif
 62
 63#ifdef	_BSD_CLOCKID_T_
 64typedef	_BSD_CLOCKID_T_	clockid_t;
 65#undef	_BSD_CLOCKID_T_
 66#endif
 67
 68#ifdef	_BSD_TIMER_T_
 69typedef	_BSD_TIMER_T_	timer_t;
 70#undef	_BSD_TIMER_T_
 71#endif
 72
 73#define CLOCKS_PER_SEC	100
 74
 75struct tm {
 76	int	tm_sec;		/* seconds after the minute [0-60] */
 77	int	tm_min;		/* minutes after the hour [0-59] */
 78	int	tm_hour;	/* hours since midnight [0-23] */
 79	int	tm_mday;	/* day of the month [1-31] */
 80	int	tm_mon;		/* months since January [0-11] */
 81	int	tm_year;	/* years since 1900 */
 82	int	tm_wday;	/* days since Sunday [0-6] */
 83	int	tm_yday;	/* days since January 1 [0-365] */
 84	int	tm_isdst;	/* Daylight Savings Time flag */
 85	long	tm_gmtoff;	/* offset from UTC in seconds */
 86	__aconst char *tm_zone;	/* timezone abbreviation */
 87};
 88
 89__BEGIN_DECLS
 90char *asctime(const struct tm *);
 91clock_t clock(void);
 92#ifndef __LIBC12_SOURCE__
 93char *ctime(const time_t *) __RENAME(__ctime50);
 94double difftime(time_t, time_t) __RENAME(__difftime50);
 95struct tm *gmtime(const time_t *) __RENAME(__gmtime50);
 96struct tm *localtime(const time_t *) __RENAME(__locatime50);
 97time_t time(time_t *) __RENAME(__time50);
 98time_t mktime(struct tm *) __RENAME(__mktime50);
 99#endif
100size_t strftime(char * __restrict, size_t, const char * __restrict,
101    const struct tm * __restrict)
102    __attribute__((__format__(__strftime__, 3, 0)));
103
104#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
105    defined(_NETBSD_SOURCE)
106#ifndef __LIBC12_SOURCE__
107/*
108 * CLK_TCK uses libc's internal __sysconf() to retrieve the machine's
109 * HZ. The value of _SC_CLK_TCK is 39 -- we hard code it so we do not
110 * need to include unistd.h
111 */
112long __sysconf(int);
113#define CLK_TCK		(__sysconf(39))
114#endif
115#endif
116
117extern __aconst char *tzname[2];
118#ifndef __LIBC12_SOURCE__
119void tzset(void) __RENAME(__tzset50);
120#endif
121
122/*
123 * X/Open Portability Guide >= Issue 4
124 */
125#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
126extern int daylight;
127#ifndef __LIBC12_SOURCE__
128extern long int timezone __RENAME(__timezone13);
129#endif
130char *strptime(const char * __restrict, const char * __restrict,
131    struct tm * __restrict);
132#endif
133
134#if (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
135    defined(_NETBSD_SOURCE)
136struct tm *getdate(const char *);
137extern int getdate_err;
138#endif
139
140/* ISO/IEC 9899:201x 7.27.1/3 Components of time */
141#include <sys/timespec.h>
142
143#if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
144    defined(_NETBSD_SOURCE)
145#include <sys/time.h>
146struct sigevent;
147struct itimerspec;
148int clock_nanosleep(clockid_t, int, const struct timespec *, struct timespec *);
149#ifndef __LIBC12_SOURCE__
150int clock_getres(clockid_t, struct timespec *)
151    __RENAME(__clock_getres50);
152int clock_gettime(clockid_t, struct timespec *)
153    __RENAME(__clock_gettime50);
154int clock_settime(clockid_t, const struct timespec *)
155    __RENAME(__clock_settime50);
156int nanosleep(const struct timespec *, struct timespec *)
157    __RENAME(__nanosleep50);
158int timer_gettime(timer_t, struct itimerspec *) __RENAME(__timer_gettime50);
159int timer_settime(timer_t, int, const struct itimerspec * __restrict, 
160    struct itimerspec * __restrict) __RENAME(__timer_settime50);
161#endif
162#ifdef _NETBSD_SOURCE
163#include <sys/idtype.h>
164int clock_getcpuclockid2(idtype_t, id_t, clockid_t *);
165#endif
166int clock_getcpuclockid(pid_t, clockid_t *);
167
168int timer_create(clockid_t, struct sigevent * __restrict,
169    timer_t * __restrict);
170int timer_delete(timer_t);
171int timer_getoverrun(timer_t);
172#endif /* _POSIX_C_SOURCE >= 199309 || _XOPEN_SOURCE >= 500 || ... */
173
174#if (_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500 || \
175    defined(_REENTRANT) || defined(_NETBSD_SOURCE)
176char *asctime_r(const struct tm * __restrict, char * __restrict);
177#ifndef __LIBC12_SOURCE__
178char *ctime_r(const time_t *, char *) __RENAME(__ctime_r50);
179struct tm *gmtime_r(const time_t * __restrict, struct tm * __restrict)
180    __RENAME(__gmtime_r50);
181struct tm *localtime_r(const time_t * __restrict, struct tm * __restrict)
182    __RENAME(__localtime_r50);
183#endif
184#endif
185
186#if (_POSIX_C_SOURCE - 0) >= 200809L || defined(_NETBSD_SOURCE)
187#  ifndef __LOCALE_T_DECLARED
188typedef struct _locale		*locale_t;
189#  define __LOCALE_T_DECLARED
190#  endif
191size_t strftime_l(char * __restrict, size_t, const char * __restrict,
192    const struct tm * __restrict, locale_t)
193    __attribute__((__format__(__strftime__, 3, 0)));
194#endif
195
196#if defined(_NETBSD_SOURCE)
197
198typedef struct __state *timezone_t;
199
200#ifndef __LIBC12_SOURCE__
201time_t time2posix(time_t) __RENAME(__time2posix50);
202time_t posix2time(time_t) __RENAME(__posix2time50);
203time_t timegm(struct tm *) __RENAME(__timegm50);
204time_t timeoff(struct tm *, long) __RENAME(__timeoff50);
205time_t timelocal(struct tm *) __RENAME(__timelocal50);
206struct tm *offtime(const time_t *, long) __RENAME(__offtime50);
207void tzsetwall(void) __RENAME(__tzsetwall50);
208
209struct tm *offtime_r(const time_t *, long, struct tm *) __RENAME(__offtime_r50);
210struct tm *localtime_rz(timezone_t __restrict, const time_t * __restrict,
211    struct tm * __restrict) __RENAME(__localtime_rz50);
212char *ctime_rz(timezone_t __restrict, const time_t *, char *)
213    __RENAME(__ctime_rz50);
214time_t mktime_z(timezone_t __restrict, struct tm * __restrict)
215    __RENAME(__mktime_z50);
216time_t timelocal_z(timezone_t __restrict, struct tm *)
217    __RENAME(__timelocal_z50);
218time_t time2posix_z(timezone_t __restrict, time_t) __RENAME(__time2posix_z50);
219time_t posix2time_z(timezone_t __restrict, time_t) __RENAME(__posix2time_z50);
220timezone_t tzalloc(const char *) __RENAME(__tzalloc50);
221void tzfree(timezone_t __restrict) __RENAME(__tzfree50);
222const char *tzgetname(timezone_t __restrict, int) __RENAME(__tzgetname50);
223long tzgetgmtoff(timezone_t __restrict, int) __RENAME(__tzgetgmtoff50);
224#endif
225
226size_t strftime_lz(timezone_t __restrict, char * __restrict, size_t,
227    const char * __restrict, const struct tm * __restrict, locale_t)
228    __attribute__((__format__(__strftime__, 4, 0)));
229size_t strftime_z(timezone_t __restrict, char * __restrict, size_t,
230    const char * __restrict, const struct tm * __restrict)
231    __attribute__((__format__(__strftime__, 4, 0)));
232char *strptime_l(const char * __restrict, const char * __restrict,
233    struct tm * __restrict, locale_t);
234
235#endif /* _NETBSD_SOURCE */
236
237/* ISO/IEC 9899:201x 7.27.2.5 The timespec_get function */
238#define TIME_UTC	1	/* time elapsed since epoch */
239int timespec_get(struct timespec *ts, int base);
240
241__END_DECLS
242
243#endif /* !_TIME_H_ */