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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)time.h      8.5 (Berkeley) 5/4/95
  30  * $FreeBSD: src/sys/sys/time.h,v 1.42 1999/12/29 04:24:48 peter Exp $
  31  */
  32
  33 #ifndef _SYS_TIME_H_
  34 #define _SYS_TIME_H_
  35
  36 #ifdef _KERNEL
  37 #include <sys/types.h>
  38 #include <machine/clock.h>
  39 #else
  40 #include <machine/stdint.h>
  41 #endif
  42
  43 #include <sys/_timespec.h>
  44 #include <sys/_timeval.h>
  45 #include <sys/select.h>
  46
  47 #define TIMEVAL_TO_TIMESPEC(tv, ts)                                     \
  48         do {                                                            \
  49                 (ts)->tv_sec = (tv)->tv_sec;                            \
  50                 (ts)->tv_nsec = (tv)->tv_usec * 1000;                   \
  51         } while (0)
  52 #define TIMESPEC_TO_TIMEVAL(tv, ts)                                     \
  53         do {                                                            \
  54                 (tv)->tv_sec = (ts)->tv_sec;                            \
  55                 (tv)->tv_usec = (ts)->tv_nsec / 1000;                   \
  56         } while (0)
  57
  58 struct timezone {
  59         int     tz_minuteswest; /* minutes west of Greenwich */
  60         int     tz_dsttime;     /* type of dst correction */
  61 };
  62 #define DST_NONE        0       /* not on dst */
  63 #define DST_USA         1       /* USA style dst */
  64 #define DST_AUST        2       /* Australian style dst */
  65 #define DST_WET         3       /* Western European dst */
  66 #define DST_MET         4       /* Middle European dst */
  67 #define DST_EET         5       /* Eastern European dst */
  68 #define DST_CAN         6       /* Canada */
  69
  70 #ifdef _KERNEL
  71
  72 /* Operations on timespecs */
  73 #define timespecclear(tvp)      ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
  74 #define timespecisset(tvp)      ((tvp)->tv_sec || (tvp)->tv_nsec)
  75 #define timespeccmp(tvp, uvp, cmp)                                      \
  76         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
  77             ((tvp)->tv_nsec cmp (uvp)->tv_nsec) :                       \
  78             ((tvp)->tv_sec cmp (uvp)->tv_sec))
  79 #define timespecadd(vvp, uvp)                                           \
  80         do {                                                            \
  81                 (vvp)->tv_sec += (uvp)->tv_sec;                         \
  82                 (vvp)->tv_nsec += (uvp)->tv_nsec;                       \
  83                 if ((vvp)->tv_nsec >= 1000000000) {                     \
  84                         (vvp)->tv_sec++;                                \
  85                         (vvp)->tv_nsec -= 1000000000;                   \
  86                 }                                                       \
  87         } while (0)
  88 #define timespecsub(vvp, uvp)                                           \
  89         do {                                                            \
  90                 (vvp)->tv_sec -= (uvp)->tv_sec;                         \
  91                 (vvp)->tv_nsec -= (uvp)->tv_nsec;                       \
  92                 if ((vvp)->tv_nsec < 0) {                               \
  93                         (vvp)->tv_sec--;                                \
  94                         (vvp)->tv_nsec += 1000000000;                   \
  95                 }                                                       \
  96         } while (0)
  97
  98 /* Operations on timevals. */
  99
 100 #define timevalclear(tvp)               ((tvp)->tv_sec = (tvp)->tv_usec = 0)
 101 #define timevalisset(tvp)               ((tvp)->tv_sec || (tvp)->tv_usec)
 102 #define timevalcmp(tvp, uvp, cmp)                                       \
 103         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
 104             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
 105             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 106
 107 /* timevaladd and timevalsub are not inlined */
 108
 109 #endif /* _KERNEL */
 110
 111 #ifndef _KERNEL                 /* NetBSD/OpenBSD compatible interfaces */
 112
 113 #define timerclear(tvp)         ((tvp)->tv_sec = (tvp)->tv_usec = 0)
 114 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
 115 #define timercmp(tvp, uvp, cmp)                                 \
 116         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
 117             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
 118             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 119 #define timeradd(tvp, uvp, vvp)                                         \
 120         do {                                                            \
 121                 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;          \
 122                 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;       \
 123                 if ((vvp)->tv_usec >= 1000000) {                        \
 124                         (vvp)->tv_sec++;                                \
 125                         (vvp)->tv_usec -= 1000000;                      \
 126                 }                                                       \
 127         } while (0)
 128 #define timersub(tvp, uvp, vvp)                                         \
 129         do {                                                            \
 130                 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;          \
 131                 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;       \
 132                 if ((vvp)->tv_usec < 0) {                               \
 133                         (vvp)->tv_sec--;                                \
 134                         (vvp)->tv_usec += 1000000;                      \
 135                 }                                                       \
 136         } while (0)
 137 #endif
 138
 139 /*
 140  * Names of the interval timers, and structure
 141  * defining a timer setting.
 142  */
 143 #define ITIMER_REAL     0
 144 #define ITIMER_VIRTUAL  1
 145 #define ITIMER_PROF     2
 146
 147 struct  itimerval {
 148         struct  timeval it_interval;    /* timer interval */
 149         struct  timeval it_value;       /* current value */
 150 };
 151
 152 /*
 153  * Getkerninfo clock information structure
 154  */
 155 struct clockinfo {
 156         int     hz;             /* clock frequency */
 157         int     tick;           /* micro-seconds per hz tick */
 158         int     tickadj;        /* clock skew rate for adjtime() */
 159         int     stathz;         /* statistics clock frequency */
 160         int     profhz;         /* profiling clock frequency */
 161 };
 162
 163 /* CLOCK_REALTIME and TIMER_ABSTIME are supposed to be in time.h */
 164
 165 #ifndef CLOCK_REALTIME
 166 #define CLOCK_REALTIME          0
 167 #endif
 168 #define CLOCK_VIRTUAL           1
 169 #define CLOCK_PROF              2
 170 #define CLOCK_MONOTONIC         4
 171
 172 #define CLOCK_UPTIME            5       /* from freebsd */
 173 #define CLOCK_UPTIME_PRECISE    7       /* from freebsd */
 174 #define CLOCK_UPTIME_FAST       8       /* from freebsd */
 175 #define CLOCK_REALTIME_PRECISE  9       /* from freebsd */
 176 #define CLOCK_REALTIME_FAST     10      /* from freebsd */
 177 #define CLOCK_MONOTONIC_PRECISE 11      /* from freebsd */
 178 #define CLOCK_MONOTONIC_FAST    12      /* from freebsd */
 179 #define CLOCK_SECOND            13      /* from freebsd */
 180 #define CLOCK_THREAD_CPUTIME_ID         14
 181 #define CLOCK_PROCESS_CPUTIME_ID        15
 182
 183 #define TIMER_RELTIME   0x0     /* relative timer */
 184 #ifndef TIMER_ABSTIME
 185 #define TIMER_ABSTIME   0x1     /* absolute timer */
 186 #endif
 187
 188 #ifdef _KERNEL
 189
 190 extern time_t   time_second;            /* simple time_t (can step) */
 191 extern time_t   time_uptime;            /* monotonic simple uptime / seconds */
 192 extern int64_t  ntp_tick_permanent;
 193 extern int64_t  ntp_tick_acc;
 194 extern int64_t  ntp_delta;
 195 extern int64_t  ntp_big_delta;
 196 extern int32_t  ntp_tick_delta;
 197 extern int32_t  ntp_default_tick_delta;
 198 extern time_t   ntp_leap_second;
 199 extern int      ntp_leap_insert;
 200
 201 void    initclocks_pcpu(void);
 202 void    getmicrouptime(struct timeval *tv);
 203 void    getmicrotime(struct timeval *tv);
 204 void    getnanouptime(struct timespec *tv);
 205 void    getnanotime(struct timespec *tv);
 206 int     itimerdecr(struct itimerval *itp, int usec);
 207 int     itimerfix(struct timeval *tv);
 208 int     itimespecfix(struct timespec *ts);
 209 int     ppsratecheck(struct timeval *, int *, int usec);
 210 int     ratecheck(struct timeval *, const struct timeval *);
 211 void    microuptime(struct timeval *tv);
 212 void    microtime(struct timeval *tv);
 213 void    nanouptime(struct timespec *ts);
 214 void    nanotime(struct timespec *ts);
 215 time_t  get_approximate_time_t(void);
 216 void    set_timeofday(struct timespec *ts);
 217 void    kern_adjtime(int64_t, int64_t *);
 218 void    kern_reladjtime(int64_t);
 219 void    timevaladd(struct timeval *, const struct timeval *);
 220 void    timevalsub(struct timeval *, const struct timeval *);
 221 int     tvtohz_high(struct timeval *);
 222 int     tvtohz_low(struct timeval *);
 223 int     tstohz_high(struct timespec *);
 224 int     tstohz_low(struct timespec *);
 225 int     tsc_test_target(int64_t target);
 226 void    tsc_delay(int ns);
 227 int     nanosleep1(struct timespec *rqt, struct timespec *rmt);
 228
 229 tsc_uclock_t tsc_get_target(int ns);
 230
 231 #else /* !_KERNEL */
 232
 233 #include <time.h>
 234 #include <sys/cdefs.h>
 235
 236 #endif /* !_KERNEL */
 237
 238 __BEGIN_DECLS
 239
 240 #if __BSD_VISIBLE
 241 int     adjtime(const struct timeval *, struct timeval *);
 242 int     futimes(int, const struct timeval *);
 243 int     lutimes(const char *, const struct timeval *);
 244 int     settimeofday(const struct timeval *, const struct timezone *);
 245 #endif
 246
 247 #if __XSI_VISIBLE
 248 int     getitimer(int, struct itimerval *);
 249 int     gettimeofday(struct timeval * __restrict, struct timezone * __restrict);
 250 int     setitimer(int, const struct itimerval * __restrict,
 251             struct itimerval * __restrict);
 252 int     utimes(const char *, const struct timeval *);
 253 #endif
 254
 255 __END_DECLS
 256
 257 #endif /* !_SYS_TIME_H_ */