time.h revision 1.37
1/* $NetBSD: time.h,v 1.37 2008/09/21 16:59:46 christos 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 [0-61] */ 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); 92char *ctime(const time_t *); 93double difftime(time_t, time_t); 94struct tm *gmtime(const time_t *); 95struct tm *localtime(const time_t *); 96time_t mktime(struct tm *); 97size_t strftime(char * __restrict, size_t, const char * __restrict, 98 const struct tm * __restrict) 99 __attribute__((__format__(__strftime__, 3, 0))); 100time_t time(time_t *); 101 102#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \ 103 defined(_NETBSD_SOURCE) 104#ifndef __LIBC12_SOURCE__ 105/* 106 * CLK_TCK uses libc's internal __sysconf() to retrieve the machine's 107 * HZ. The value of _SC_CLK_TCK is 39 -- we hard code it so we do not 108 * need to include unistd.h 109 */ 110long __sysconf(int); 111#define CLK_TCK (__sysconf(39)) 112#endif 113#endif 114 115extern __aconst char *tzname[2]; 116void tzset(void); 117 118/* 119 * X/Open Portability Guide >= Issue 4 120 */ 121#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) 122extern int daylight; 123#ifndef __LIBC12_SOURCE__ 124extern long int timezone __RENAME(__timezone13); 125#endif 126char *strptime(const char * __restrict, const char * __restrict, 127 struct tm * __restrict); 128#endif 129 130#if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \ 131 defined(_NETBSD_SOURCE) 132#include <sys/time.h> /* XXX for struct timespec */ 133struct sigevent; 134struct itimerspec; 135int clock_getres(clockid_t, struct timespec *); 136int clock_gettime(clockid_t, struct timespec *); 137int clock_settime(clockid_t, const struct timespec *); 138int nanosleep(const struct timespec *, struct timespec *); 139int timer_create(clockid_t, struct sigevent * __restrict, 140 timer_t * __restrict); 141int timer_delete(timer_t); 142int timer_getoverrun(timer_t); 143int timer_gettime(timer_t, struct itimerspec *); 144int timer_settime(timer_t, int, const struct itimerspec * __restrict, 145 struct itimerspec * __restrict); 146#endif /* _POSIX_C_SOURCE >= 199309 || _XOPEN_SOURCE >= 500 || ... */ 147 148#if (_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500 || \ 149 defined(_REENTRANT) || defined(_NETBSD_SOURCE) 150char *asctime_r(const struct tm * __restrict, char * __restrict); 151char *ctime_r(const time_t *, char *); 152struct tm *gmtime_r(const time_t * __restrict, struct tm * __restrict); 153struct tm *localtime_r(const time_t * __restrict, struct tm * __restrict); 154#endif 155 156#if defined(_NETBSD_SOURCE) 157time_t time2posix(time_t); 158time_t posix2time(time_t); 159time_t timegm(struct tm *); 160time_t timeoff(struct tm *, long); 161time_t timelocal(struct tm *); 162void tzsetwall(void); 163struct tm *offtime(const time_t *, long); 164#endif /* _NETBSD_SOURCE */ 165 166__END_DECLS 167 168#endif /* !_TIME_H_ */ 169