1 /** $MirOS: src/sys/sys/time.h,v 1.6 2011/11/21 09:39:40 tg Exp $ */ 2 /* $OpenBSD: time.h,v 1.17 2003/08/14 05:34:47 kevlo Exp $ */ 3 /* $NetBSD: time.h,v 1.18 1996/04/23 10:29:33 mycroft Exp $ */ 4 5 /* 6 * Copyright (c) 1982, 1986, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)time.h 8.2 (Berkeley) 7/10/94 34 */ 35 36 #ifndef _SYS_TIME_H_ 37 #define _SYS_TIME_H_ 38 39 #include <sys/types.h> 40 #if defined(_KERNEL) || defined(_STANDALONE) 41 #include <mirtime.h> 42 #else 43 #include <syskern/mirtime.h> 44 #endif 45 46 /* 47 * Structure returned by gettimeofday(2) system call, 48 * and used in other calls. 49 */ 50 struct timeval { 51 time_t tv_sec; /* seconds */ 52 long tv_usec; /* and microseconds */ 53 }; 54 55 /* 56 * Structure defined by POSIX.1b to be like a timeval. 57 */ 58 struct timespec { 59 time_t tv_sec; /* seconds */ 60 long tv_nsec; /* and nanoseconds */ 61 }; 62 63 #define TIMEVAL_TO_TIMESPEC(tv, ts) { \ 64 (ts)->tv_sec = (tv)->tv_sec; \ 65 (ts)->tv_nsec = (tv)->tv_usec * 1000; \ 66 } 67 #define TIMESPEC_TO_TIMEVAL(tv, ts) { \ 68 (tv)->tv_sec = (ts)->tv_sec; \ 69 (tv)->tv_usec = (ts)->tv_nsec / 1000; \ 70 } 71 72 struct timezone { 73 int tz_minuteswest; /* minutes west of Greenwich */ 74 int tz_dsttime; /* type of dst correction */ 75 }; 76 #define DST_NONE 0 /* not on dst */ 77 #define DST_USA 1 /* USA style dst */ 78 #define DST_AUST 2 /* Australian style dst */ 79 #define DST_WET 3 /* Western European dst */ 80 #define DST_MET 4 /* Middle European dst */ 81 #define DST_EET 5 /* Eastern European dst */ 82 #define DST_CAN 6 /* Canada */ 83 84 /* Operations on timevals. */ 85 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0 86 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) 87 #define timercmp(tvp, uvp, cmp) \ 88 (((tvp)->tv_sec == (uvp)->tv_sec) ? \ 89 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ 90 ((tvp)->tv_sec cmp (uvp)->tv_sec)) 91 #define timeradd(tvp, uvp, vvp) \ 92 do { \ 93 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \ 94 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \ 95 if ((vvp)->tv_usec >= 1000000) { \ 96 (vvp)->tv_sec++; \ 97 (vvp)->tv_usec -= 1000000; \ 98 } \ 99 } while (0) 100 #define timersub(tvp, uvp, vvp) \ 101 do { \ 102 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ 103 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ 104 if ((vvp)->tv_usec < 0) { \ 105 (vvp)->tv_sec--; \ 106 (vvp)->tv_usec += 1000000; \ 107 } \ 108 } while (0) 109 110 /* Operations on timespecs. */ 111 #define timespecclear(tsp) (tsp)->tv_sec = (tsp)->tv_nsec = 0 112 #define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec) 113 #define timespeccmp(tsp, usp, cmp) \ 114 (((tsp)->tv_sec == (usp)->tv_sec) ? \ 115 ((tsp)->tv_nsec cmp (usp)->tv_nsec) : \ 116 ((tsp)->tv_sec cmp (usp)->tv_sec)) 117 #define timespecadd(tsp, usp, vsp) \ 118 do { \ 119 (vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \ 120 (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \ 121 if ((vsp)->tv_nsec >= 1000000000L) { \ 122 (vsp)->tv_sec++; \ 123 (vsp)->tv_nsec -= 1000000000L; \ 124 } \ 125 } while (0) 126 #define timespecsub(tsp, usp, vsp) \ 127 do { \ 128 (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \ 129 (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \ 130 if ((vsp)->tv_nsec < 0) { \ 131 (vsp)->tv_sec--; \ 132 (vsp)->tv_nsec += 1000000000L; \ 133 } \ 134 } while (0) 135 136 /* 137 * Names of the interval timers, and structure 138 * defining a timer setting. 139 */ 140 #define ITIMER_REAL 0 141 #define ITIMER_VIRTUAL 1 142 #define ITIMER_PROF 2 143 144 struct itimerval { 145 struct timeval it_interval; /* timer interval */ 146 struct timeval it_value; /* current value */ 147 }; 148 149 /* 150 * Structure defined by POSIX 1003.1b to be like a itimerval, 151 * but with timespecs. Used in the timer_*() system calls. 152 */ 153 struct itimerspec { 154 struct timespec it_interval; /* timer interval */ 155 struct timespec it_value; /* timer expiration */ 156 }; 157 158 /* 159 * Getkerninfo clock information structure 160 */ 161 struct clockinfo { 162 int hz; /* clock frequency */ 163 int tick; /* micro-seconds per hz tick */ 164 int tickadj; /* clock skew rate for adjtime() */ 165 int stathz; /* statistics clock frequency */ 166 int profhz; /* profiling clock frequency */ 167 }; 168 169 #define CLOCK_REALTIME 0 170 #define CLOCK_VIRTUAL 1 171 #define CLOCK_PROF 2 172 #define CLOCK_MONOTONIC 3 173 174 #define TIMER_RELTIME 0x0 /* relative timer */ 175 #define TIMER_ABSTIME 0x1 /* absolute timer */ 176 177 #if defined(_KERNEL) || defined(_STANDALONE) 178 int itimerfix(struct timeval *tv); 179 int itimerdecr(struct itimerval *itp, int usec); 180 void microtime(struct timeval *tv); 181 int settime(struct timeval *tv); 182 int ratecheck(struct timeval *, const struct timeval *); 183 int ppsratecheck(struct timeval *, int *, int); 184 185 #else /* !(_KERNEL || _STANDALONE) */ 186 187 #include <time.h> 188 189 #ifndef _POSIX_SOURCE 190 __BEGIN_DECLS 191 int adjtime(const struct timeval *, struct timeval *); 192 int clock_getres(clockid_t, struct timespec *); 193 int clock_gettime(clockid_t, struct timespec *); 194 int clock_settime(clockid_t, const struct timespec *); 195 int futimes(int, const struct timeval *); 196 int lutimes(const char *, const struct timeval *); 197 int getitimer(int, struct itimerval *); 198 int gettimeofday(struct timeval *, struct timezone *); 199 int setitimer(int, const struct itimerval *, struct itimerval *); 200 int settimeofday(const struct timeval *, const struct timezone *); 201 int utimes(const char *, const struct timeval *); 202 __END_DECLS 203 #endif /* !POSIX */ 204 205 #endif /* !_KERNEL */ 206 207 #endif /* !_SYS_TIME_H_ */ 208