1 /* $OpenBSD: time.h,v 1.11 2000/10/10 13:36:48 itojun Exp $ */ 2 /* $NetBSD: time.h,v 1.18 1996/04/23 10:29:33 mycroft Exp $ */ 3 4 /* 5 * Copyright (c) 1982, 1986, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)time.h 8.2 (Berkeley) 7/10/94 33 */ 34 35 #ifndef _SYS_TIME_H_ 36 #define _SYS_TIME_H_ 37 38 #include <sys/types.h> 39 40 /* 41 * Structure returned by gettimeofday(2) system call, 42 * and used in other calls. 43 */ 44 struct timeval { 45 long tv_sec; /* seconds */ 46 long tv_usec; /* and microseconds */ 47 }; 48 49 /* 50 * Structure defined by POSIX.1b to be like a timeval. 51 */ 52 struct timespec { 53 time_t tv_sec; /* seconds */ 54 long tv_nsec; /* and nanoseconds */ 55 }; 56 57 #define TIMEVAL_TO_TIMESPEC(tv, ts) { \ 58 (ts)->tv_sec = (tv)->tv_sec; \ 59 (ts)->tv_nsec = (tv)->tv_usec * 1000; \ 60 } 61 #define TIMESPEC_TO_TIMEVAL(tv, ts) { \ 62 (tv)->tv_sec = (ts)->tv_sec; \ 63 (tv)->tv_usec = (ts)->tv_nsec / 1000; \ 64 } 65 66 struct timezone { 67 int tz_minuteswest; /* minutes west of Greenwich */ 68 int tz_dsttime; /* type of dst correction */ 69 }; 70 #define DST_NONE 0 /* not on dst */ 71 #define DST_USA 1 /* USA style dst */ 72 #define DST_AUST 2 /* Australian style dst */ 73 #define DST_WET 3 /* Western European dst */ 74 #define DST_MET 4 /* Middle European dst */ 75 #define DST_EET 5 /* Eastern European dst */ 76 #define DST_CAN 6 /* Canada */ 77 78 /* Operations on timevals. */ 79 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0 80 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) 81 #define timercmp(tvp, uvp, cmp) \ 82 (((tvp)->tv_sec == (uvp)->tv_sec) ? \ 83 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ 84 ((tvp)->tv_sec cmp (uvp)->tv_sec)) 85 #define timeradd(tvp, uvp, vvp) \ 86 do { \ 87 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \ 88 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \ 89 if ((vvp)->tv_usec >= 1000000) { \ 90 (vvp)->tv_sec++; \ 91 (vvp)->tv_usec -= 1000000; \ 92 } \ 93 } while (0) 94 #define timersub(tvp, uvp, vvp) \ 95 do { \ 96 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ 97 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ 98 if ((vvp)->tv_usec < 0) { \ 99 (vvp)->tv_sec--; \ 100 (vvp)->tv_usec += 1000000; \ 101 } \ 102 } while (0) 103 104 /* Operations on timespecs. */ 105 #define timespecclear(tsp) (tsp)->tv_sec = (tsp)->tv_nsec = 0 106 #define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec) 107 #define timespeccmp(tsp, usp, cmp) \ 108 (((tsp)->tv_sec == (usp)->tv_sec) ? \ 109 ((tsp)->tv_nsec cmp (usp)->tv_nsec) : \ 110 ((tsp)->tv_sec cmp (usp)->tv_sec)) 111 #define timespecadd(tsp, usp, vsp) \ 112 do { \ 113 (vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \ 114 (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \ 115 if ((vsp)->tv_nsec >= 1000000000L) { \ 116 (vsp)->tv_sec++; \ 117 (vsp)->tv_nsec -= 1000000000L; \ 118 } \ 119 } while (0) 120 #define timespecsub(tsp, usp, vsp) \ 121 do { \ 122 (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \ 123 (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \ 124 if ((vsp)->tv_nsec < 0) { \ 125 (vsp)->tv_sec--; \ 126 (vsp)->tv_nsec += 1000000000L; \ 127 } \ 128 } while (0) 129 130 /* 131 * Names of the interval timers, and structure 132 * defining a timer setting. 133 */ 134 #define ITIMER_REAL 0 135 #define ITIMER_VIRTUAL 1 136 #define ITIMER_PROF 2 137 138 struct itimerval { 139 struct timeval it_interval; /* timer interval */ 140 struct timeval it_value; /* current value */ 141 }; 142 143 /* 144 * Getkerninfo clock information structure 145 */ 146 struct clockinfo { 147 int hz; /* clock frequency */ 148 int tick; /* micro-seconds per hz tick */ 149 int tickadj; /* clock skew rate for adjtime() */ 150 int stathz; /* statistics clock frequency */ 151 int profhz; /* profiling clock frequency */ 152 }; 153 154 #define CLOCK_REALTIME 0 155 #define CLOCK_VIRTUAL 1 156 #define CLOCK_PROF 2 157 158 #define TIMER_RELTIME 0x0 /* relative timer */ 159 #define TIMER_ABSTIME 0x1 /* absolute timer */ 160 161 /* --- stuff got cut here - niels --- */ 162 163 #endif /* !_SYS_TIME_H_ */ 164
