time.h revision 177494
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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)time.h 8.3 (Berkeley) 1/21/94 39 */ 40 41/* 42 * $FreeBSD: head/include/time.h 177494 2008-03-22 09:59:20Z davidxu $ 43 */ 44 45#ifndef _TIME_H_ 46#define _TIME_H_ 47 48#include <sys/cdefs.h> 49#include <sys/_null.h> 50#include <sys/_types.h> 51 52#if __POSIX_VISIBLE > 0 && __POSIX_VISIBLE < 200112 || __BSD_VISIBLE 53/* 54 * Frequency of the clock ticks reported by times(). Deprecated - use 55 * sysconf(_SC_CLK_TCK) instead. (Removed in 1003.1-2001.) 56 */ 57#define CLK_TCK 128 58#endif 59 60/* Frequency of the clock ticks reported by clock(). */ 61#define CLOCKS_PER_SEC 128 62 63#ifndef _CLOCK_T_DECLARED 64typedef __clock_t clock_t; 65#define _CLOCK_T_DECLARED 66#endif 67 68#ifndef _TIME_T_DECLARED 69typedef __time_t time_t; 70#define _TIME_T_DECLARED 71#endif 72 73#ifndef _SIZE_T_DECLARED 74typedef __size_t size_t; 75#define _SIZE_T_DECLARED 76#endif 77 78#if __POSIX_VISIBLE >= 199309 79/* 80 * New in POSIX 1003.1b-1993. 81 */ 82#ifndef _CLOCKID_T_DECLARED 83typedef __clockid_t clockid_t; 84#define _CLOCKID_T_DECLARED 85#endif 86 87#ifndef _TIMER_T_DECLARED 88typedef __timer_t timer_t; 89#define _TIMER_T_DECLARED 90#endif 91 92#include <sys/timespec.h> 93#endif /* __POSIX_VISIBLE >= 199309 */ 94 95/* These macros are also in sys/time.h. */ 96#if !defined(CLOCK_REALTIME) && __POSIX_VISIBLE >= 200112 97#define CLOCK_REALTIME 0 98#ifdef __BSD_VISIBLE 99#define CLOCK_VIRTUAL 1 100#define CLOCK_PROF 2 101#endif 102#define CLOCK_MONOTONIC 4 103#define CLOCK_UPTIME 5 /* FreeBSD-specific. */ 104#define CLOCK_UPTIME_PRECISE 7 /* FreeBSD-specific. */ 105#define CLOCK_UPTIME_FAST 8 /* FreeBSD-specific. */ 106#define CLOCK_REALTIME_PRECISE 9 /* FreeBSD-specific. */ 107#define CLOCK_REALTIME_FAST 10 /* FreeBSD-specific. */ 108#define CLOCK_MONOTONIC_PRECISE 11 /* FreeBSD-specific. */ 109#define CLOCK_MONOTONIC_FAST 12 /* FreeBSD-specific. */ 110#define CLOCK_SECOND 13 /* FreeBSD-specific. */ 111#define CLOCK_THREAD_CPUTIME_ID 14 112#endif /* !defined(CLOCK_REALTIME) && __POSIX_VISIBLE >= 200112 */ 113 114#if !defined(TIMER_ABSTIME) && __POSIX_VISIBLE >= 200112 115#if __BSD_VISIBLE 116#define TIMER_RELTIME 0x0 /* relative timer */ 117#endif 118#define TIMER_ABSTIME 0x1 /* absolute timer */ 119#endif /* !defined(TIMER_ABSTIME) && __POSIX_VISIBLE >= 200112 */ 120 121struct tm { 122 int tm_sec; /* seconds after the minute [0-60] */ 123 int tm_min; /* minutes after the hour [0-59] */ 124 int tm_hour; /* hours since midnight [0-23] */ 125 int tm_mday; /* day of the month [1-31] */ 126 int tm_mon; /* months since January [0-11] */ 127 int tm_year; /* years since 1900 */ 128 int tm_wday; /* days since Sunday [0-6] */ 129 int tm_yday; /* days since January 1 [0-365] */ 130 int tm_isdst; /* Daylight Savings Time flag */ 131 long tm_gmtoff; /* offset from UTC in seconds */ 132 char *tm_zone; /* timezone abbreviation */ 133}; 134 135#if __POSIX_VISIBLE 136extern char *tzname[]; 137#endif 138 139__BEGIN_DECLS 140char *asctime(const struct tm *); 141clock_t clock(void); 142char *ctime(const time_t *); 143double difftime(time_t, time_t); 144/* XXX missing: getdate() */ 145struct tm *gmtime(const time_t *); 146struct tm *localtime(const time_t *); 147time_t mktime(struct tm *); 148size_t strftime(char * __restrict, size_t, const char * __restrict, 149 const struct tm * __restrict); 150time_t time(time_t *); 151#if __POSIX_VISIBLE >= 200112 152struct sigevent; 153int timer_create(clockid_t, struct sigevent *__restrict, timer_t *__restrict); 154int timer_delete(timer_t); 155int timer_gettime(timer_t, struct itimerspec *); 156int timer_getoverrun(timer_t); 157int timer_settime(timer_t, int, const struct itimerspec *__restrict, 158 struct itimerspec *__restrict); 159#endif 160#if __POSIX_VISIBLE 161void tzset(void); 162#endif 163 164#if __POSIX_VISIBLE >= 199309 165int clock_getres(clockid_t, struct timespec *); 166int clock_gettime(clockid_t, struct timespec *); 167int clock_settime(clockid_t, const struct timespec *); 168/* XXX missing: clock_nanosleep() */ 169int nanosleep(const struct timespec *, struct timespec *); 170#endif /* __POSIX_VISIBLE >= 199309 */ 171 172#if __POSIX_VISIBLE >= 199506 173char *asctime_r(const struct tm *, char *); 174char *ctime_r(const time_t *, char *); 175struct tm *gmtime_r(const time_t *, struct tm *); 176struct tm *localtime_r(const time_t *, struct tm *); 177#endif 178 179#if __XSI_VISIBLE 180char *strptime(const char * __restrict, const char * __restrict, 181 struct tm * __restrict); 182#endif 183 184#if __BSD_VISIBLE 185char *timezone(int, int); /* XXX XSI conflict */ 186void tzsetwall(void); 187time_t timelocal(struct tm * const); 188time_t timegm(struct tm * const); 189#endif /* __BSD_VISIBLE */ 190__END_DECLS 191 192#endif /* !_TIME_H_ */ 193