sys/sys/time.h

   1 /*
   2  * Copyright (c) 1982, 1986, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. 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      8.5 (Berkeley) 5/4/95
  34  * $FreeBSD: src/sys/sys/time.h,v 1.42 1999/12/29 04:24:48 peter Exp $
  35  * $DragonFly: src/sys/sys/time.h,v 1.20 2008/06/18 09:36:07 hasso Exp $
  36  */
  37
  38 #ifndef _SYS_TIME_H_
  39 #define _SYS_TIME_H_
  40
  41 #ifndef _SYS_TYPES_H_
  42 #include <sys/types.h>
  43 #endif
  44
  45 #include <sys/_timespec.h>
  46 #include <sys/_timeval.h>
  47 #include <sys/select.h>
  48
  49 #define TIMEVAL_TO_TIMESPEC(tv, ts)                                     \
  50         do {                                                            \
  51                 (ts)->tv_sec = (tv)->tv_sec;                            \
  52                 (ts)->tv_nsec = (tv)->tv_usec * 1000;                   \
  53         } while (0)
  54 #define TIMESPEC_TO_TIMEVAL(tv, ts)                                     \
  55         do {                                                            \
  56                 (tv)->tv_sec = (ts)->tv_sec;                            \
  57                 (tv)->tv_usec = (ts)->tv_nsec / 1000;                   \
  58         } while (0)
  59
  60 struct timezone {
  61         int     tz_minuteswest; /* minutes west of Greenwich */
  62         int     tz_dsttime;     /* type of dst correction */
  63 };
  64 #define DST_NONE        0       /* not on dst */
  65 #define DST_USA         1       /* USA style dst */
  66 #define DST_AUST        2       /* Australian style dst */
  67 #define DST_WET         3       /* Western European dst */
  68 #define DST_MET         4       /* Middle European dst */
  69 #define DST_EET         5       /* Eastern European dst */
  70 #define DST_CAN         6       /* Canada */
  71
  72 #ifdef _KERNEL
  73
  74 /* Operations on timespecs */
  75 #define timespecclear(tvp)      ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
  76 #define timespecisset(tvp)      ((tvp)->tv_sec || (tvp)->tv_nsec)
  77 #define timespeccmp(tvp, uvp, cmp)                                      \
  78         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
  79             ((tvp)->tv_nsec cmp (uvp)->tv_nsec) :                       \
  80             ((tvp)->tv_sec cmp (uvp)->tv_sec))
  81 #define timespecadd(vvp, uvp)                                           \
  82         do {                                                            \
  83                 (vvp)->tv_sec += (uvp)->tv_sec;                         \
  84                 (vvp)->tv_nsec += (uvp)->tv_nsec;                       \
  85                 if ((vvp)->tv_nsec >= 1000000000) {                     \
  86                         (vvp)->tv_sec++;                                \
  87                         (vvp)->tv_nsec -= 1000000000;                   \
  88                 }                                                       \
  89         } while (0)
  90 #define timespecsub(vvp, uvp)                                           \
  91         do {                                                            \
  92                 (vvp)->tv_sec -= (uvp)->tv_sec;                         \
  93                 (vvp)->tv_nsec -= (uvp)->tv_nsec;                       \
  94                 if ((vvp)->tv_nsec < 0) {                               \
  95                         (vvp)->tv_sec--;                                \
  96                         (vvp)->tv_nsec += 1000000000;                   \
  97                 }                                                       \
  98         } while (0)
  99
 100 /* Operations on timevals. */
 101
 102 #define timevalclear(tvp)               (tvp)->tv_sec = (tvp)->tv_usec = 0
 103 #define timevalisset(tvp)               ((tvp)->tv_sec || (tvp)->tv_usec)
 104 #define timevalcmp(tvp, uvp, cmp)                                       \
 105         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
 106             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
 107             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 108
 109 /* timevaladd and timevalsub are not inlined */
 110
 111 #endif /* _KERNEL */
 112
 113 #ifndef _KERNEL                 /* NetBSD/OpenBSD compatible interfaces */
 114
 115 #define timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
 116 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
 117 #define timercmp(tvp, uvp, cmp)                                 \
 118         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
 119             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
 120             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 121 #define timeradd(tvp, uvp, vvp)                                         \
 122         do {                                                            \
 123                 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;          \
 124                 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;       \
 125                 if ((vvp)->tv_usec >= 1000000) {                        \
 126                         (vvp)->tv_sec++;                                \
 127                         (vvp)->tv_usec -= 1000000;                      \
 128                 }                                                       \
 129         } while (0)
 130 #define timersub(tvp, uvp, vvp)                                         \
 131         do {                                                            \
 132                 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;          \
 133                 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;       \
 134                 if ((vvp)->tv_usec < 0) {                               \
 135                         (vvp)->tv_sec--;                                \
 136                         (vvp)->tv_usec += 1000000;                      \
 137                 }                                                       \
 138         } while (0)
 139 #endif
 140
 141 /*
 142  * Names of the interval timers, and structure
 143  * defining a timer setting.
 144  */
 145 #define ITIMER_REAL     0
 146 #define ITIMER_VIRTUAL  1
 147 #define ITIMER_PROF     2
 148
 149 struct  itimerval {
 150         struct  timeval it_interval;    /* timer interval */
 151         struct  timeval it_value;       /* current value */
 152 };
 153
 154 /*
 155  * Getkerninfo clock information structure
 156  *
 157  * XXX Should be removed, use kinfo_clockinfo insteada.
 158  */
 159 struct clockinfo {
 160         int     hz;             /* clock frequency */
 161         int     tick;           /* micro-seconds per hz tick */
 162         int     tickadj;        /* clock skew rate for adjtime() */
 163         int     stathz;         /* statistics clock frequency */
 164         int     profhz;         /* profiling clock frequency */
 165 };
 166
 167 /* CLOCK_REALTIME and TIMER_ABSTIME are supposed to be in time.h */
 168
 169 #ifndef CLOCK_REALTIME
 170 #define CLOCK_REALTIME  0
 171 #endif
 172 #define CLOCK_VIRTUAL   1
 173 #define CLOCK_PROF      2
 174 #define CLOCK_MONOTONIC 4
 175
 176 #define TIMER_RELTIME   0x0     /* relative timer */
 177 #ifndef TIMER_ABSTIME
 178 #define TIMER_ABSTIME   0x1     /* absolute timer */
 179 #endif
 180
 181 #ifdef _KERNEL
 182
 183 /*
 184  * For krateprintf()
 185  */
 186 struct krate {
 187         int freq;
 188         int ticks;
 189         int count;
 190 };
 191
 192 #endif
 193
 194 #ifdef _KERNEL
 195 extern time_t   time_second;
 196 extern int64_t  ntp_tick_permanent;
 197 extern int64_t  ntp_tick_acc;
 198 extern int64_t  ntp_delta;
 199 extern int64_t  ntp_big_delta;
 200 extern int32_t  ntp_tick_delta;
 201 extern int32_t  ntp_default_tick_delta;
 202 extern time_t   ntp_leap_second;
 203 extern int      ntp_leap_insert;
 204
 205 void    initclocks_pcpu(void);
 206 void    getmicrouptime (struct timeval *tv);
 207 void    getmicrotime (struct timeval *tv);
 208 void    getnanouptime (struct timespec *tv);
 209 void    getnanotime (struct timespec *tv);
 210 int     itimerdecr (struct itimerval *itp, int usec);
 211 int     itimerfix (struct timeval *tv);
 212 int     ppsratecheck (struct timeval *, int *, int usec);
 213 int     ratecheck (struct timeval *, const struct timeval *);
 214 void    microuptime (struct timeval *tv);
 215 void    microtime (struct timeval *tv);
 216 void    nanouptime (struct timespec *ts);
 217 void    nanotime (struct timespec *ts);
 218 time_t  get_approximate_time_t(void);
 219 void    set_timeofday(struct timespec *ts);
 220 void    kern_adjtime(int64_t, int64_t *);
 221 void    kern_reladjtime(int64_t);
 222 void    timevaladd (struct timeval *, const struct timeval *);
 223 void    timevalsub (struct timeval *, const struct timeval *);
 224 int     tvtohz_high (struct timeval *);
 225 int     tvtohz_low (struct timeval *);
 226 int     tstohz_high (struct timespec *);
 227 int     tstohz_low (struct timespec *);
 228 int64_t tsc_get_target(int ns);
 229 int     tsc_test_target(int64_t target);
 230
 231 #else /* !_KERNEL */
 232
 233 #include <time.h>
 234 #include <sys/cdefs.h>
 235
 236 #endif /* !_KERNEL */
 237
 238 __BEGIN_DECLS
 239 int     adjtime (const struct timeval *, struct timeval *);
 240 int     futimes (int, const struct timeval *);
 241 int     getitimer (int, struct itimerval *);
 242 int     gettimeofday (struct timeval *, struct timezone *);
 243 int     lutimes (const char *, const struct timeval *);
 244 int     setitimer (int, const struct itimerval *, struct itimerval *);
 245 int     settimeofday (const struct timeval *, const struct timezone *);
 246 int     utimes (const char *, const struct timeval *);
 247 __END_DECLS
 248
 249
 250 #endif /* !_SYS_TIME_H_ */