time.h revision 25578
1129202Scognet/* 2129202Scognet * Copyright (c) 1982, 1986, 1993 3129202Scognet * The Regents of the University of California. All rights reserved. 4129202Scognet * 5129202Scognet * Redistribution and use in source and binary forms, with or without 6129202Scognet * modification, are permitted provided that the following conditions 7129202Scognet * are met: 8129202Scognet * 1. Redistributions of source code must retain the above copyright 9129202Scognet * notice, this list of conditions and the following disclaimer. 10129202Scognet * 2. Redistributions in binary form must reproduce the above copyright 11129202Scognet * notice, this list of conditions and the following disclaimer in the 12129202Scognet * documentation and/or other materials provided with the distribution. 13129202Scognet * 3. All advertising materials mentioning features or use of this software 14129202Scognet * must display the following acknowledgement: 15129202Scognet * This product includes software developed by the University of 16129202Scognet * California, Berkeley and its contributors. 17129202Scognet * 4. Neither the name of the University nor the names of its contributors 18129202Scognet * may be used to endorse or promote products derived from this software 19129202Scognet * without specific prior written permission. 20129202Scognet * 21129202Scognet * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22129202Scognet * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23129202Scognet * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24129202Scognet * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25129202Scognet * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26129202Scognet * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27129202Scognet * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28129202Scognet * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29129202Scognet * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30129202Scognet * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31129202Scognet * SUCH DAMAGE. 32129202Scognet * 33129202Scognet * @(#)time.h 8.5 (Berkeley) 5/4/95 34129202Scognet * $Id: time.h,v 1.12 1997/03/22 06:53:24 bde Exp $ 35129202Scognet */ 36129202Scognet 37129202Scognet#ifndef _SYS_TIME_H_ 38129202Scognet#define _SYS_TIME_H_ 39129202Scognet 40129202Scognet#include <sys/types.h> 41129202Scognet 42129202Scognet/* 43129202Scognet * Structure returned by gettimeofday(2) system call, 44129202Scognet * and used in other calls. 45137464Scognet */ 46struct timeval { 47 long tv_sec; /* seconds */ 48 long tv_usec; /* and microseconds */ 49}; 50 51/* 52 * Structure defined by POSIX.4 to be like a timeval. 53 */ 54struct timespec { 55 time_t tv_sec; /* seconds */ 56 long tv_nsec; /* and nanoseconds */ 57}; 58 59#define TIMEVAL_TO_TIMESPEC(tv, ts) { \ 60 (ts)->tv_sec = (tv)->tv_sec; \ 61 (ts)->tv_nsec = (tv)->tv_usec * 1000; \ 62} 63#define TIMESPEC_TO_TIMEVAL(tv, ts) { \ 64 (tv)->tv_sec = (ts)->tv_sec; \ 65 (tv)->tv_usec = (ts)->tv_nsec / 1000; \ 66} 67 68struct timezone { 69 int tz_minuteswest; /* minutes west of Greenwich */ 70 int tz_dsttime; /* type of dst correction */ 71}; 72#define DST_NONE 0 /* not on dst */ 73#define DST_USA 1 /* USA style dst */ 74#define DST_AUST 2 /* Australian style dst */ 75#define DST_WET 3 /* Western European dst */ 76#define DST_MET 4 /* Middle European dst */ 77#define DST_EET 5 /* Eastern European dst */ 78#define DST_CAN 6 /* Canada */ 79 80/* Operations on timevals. */ 81#define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0 82#define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) 83#define timercmp(tvp, uvp, cmp) \ 84 (((tvp)->tv_sec == (uvp)->tv_sec) ? \ 85 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ 86 ((tvp)->tv_sec cmp (uvp)->tv_sec)) 87#ifndef KERNEL /* use timevaladd/timevalsub in kernel */ 88/* NetBSD/OpenBSD compatable interfaces */ 89#define timeradd(tvp, uvp, vvp) \ 90 do { \ 91 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \ 92 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \ 93 if ((vvp)->tv_usec >= 1000000) { \ 94 (vvp)->tv_sec++; \ 95 (vvp)->tv_usec -= 1000000; \ 96 } \ 97 } while (0) 98#define timersub(tvp, uvp, vvp) \ 99 do { \ 100 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ 101 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ 102 if ((vvp)->tv_usec < 0) { \ 103 (vvp)->tv_sec--; \ 104 (vvp)->tv_usec += 1000000; \ 105 } \ 106 } while (0) 107#endif 108 109/* 110 * Names of the interval timers, and structure 111 * defining a timer setting. 112 */ 113#define ITIMER_REAL 0 114#define ITIMER_VIRTUAL 1 115#define ITIMER_PROF 2 116 117struct itimerval { 118 struct timeval it_interval; /* timer interval */ 119 struct timeval it_value; /* current value */ 120}; 121 122/* 123 * Getkerninfo clock information structure 124 */ 125struct clockinfo { 126 int hz; /* clock frequency */ 127 int tick; /* micro-seconds per hz tick */ 128 int stathz; /* statistics clock frequency */ 129 int profhz; /* profiling clock frequency */ 130}; 131 132#define CLOCK_REALTIME 0 133#define CLOCK_VIRTUAL 1 134#define CLOCK_PROF 2 135 136#define TIMER_RELTIME 0x0 /* relative timer */ 137#define TIMER_ABSTIME 0x1 /* absolute timer */ 138 139#ifdef KERNEL 140void gettime __P((struct timeval *tv)); 141int itimerfix __P((struct timeval *tv)); 142int itimerdecr __P((struct itimerval *itp, int usec)); 143void microtime __P((struct timeval *tv)); 144void timevaladd __P((struct timeval *, struct timeval *)); 145void timevalsub __P((struct timeval *, struct timeval *)); 146#else /* !KERNEL */ 147#include <time.h> 148 149#ifndef _POSIX_SOURCE 150#include <sys/cdefs.h> 151 152__BEGIN_DECLS 153int adjtime __P((const struct timeval *, struct timeval *)); 154int getitimer __P((int, struct itimerval *)); 155int gettimeofday __P((struct timeval *, struct timezone *)); 156int setitimer __P((int, const struct itimerval *, struct itimerval *)); 157int settimeofday __P((const struct timeval *, const struct timezone *)); 158int utimes __P((const char *, const struct timeval *)); 159__END_DECLS 160#endif /* !POSIX */ 161 162#endif /* !KERNEL */ 163 164#endif /* !_SYS_TIME_H_ */ 165