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 #ifndef _SYS_TYPES_H_
  37 #include <sys/types.h>
  38 #endif
  39
  40 #include <sys/_timespec.h>
  41 #include <sys/_timeval.h>
  42 #include <sys/select.h>
  43
  44 #define TIMEVAL_TO_TIMESPEC(tv, ts)                                     \
  45         do {                                                            \
  46                 (ts)->tv_sec = (tv)->tv_sec;                            \
  47                 (ts)->tv_nsec = (tv)->tv_usec * 1000;                   \
  48         } while (0)
  49 #define TIMESPEC_TO_TIMEVAL(tv, ts)                                     \
  50         do {                                                            \
  51                 (tv)->tv_sec = (ts)->tv_sec;                            \
  52                 (tv)->tv_usec = (ts)->tv_nsec / 1000;                   \
  53         } while (0)
  54
  55 struct timezone {
  56         int     tz_minuteswest; /* minutes west of Greenwich */
  57         int     tz_dsttime;     /* type of dst correction */
  58 };
  59 #define DST_NONE        0       /* not on dst */
  60 #define DST_USA         1       /* USA style dst */
  61 #define DST_AUST        2       /* Australian style dst */
  62 #define DST_WET         3       /* Western European dst */
  63 #define DST_MET         4       /* Middle European dst */
  64 #define DST_EET         5       /* Eastern European dst */
  65 #define DST_CAN         6       /* Canada */
  66
  67 #ifdef _KERNEL
  68
  69 /* Operations on timespecs */
  70 #define timespecclear(tvp)      ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
  71 #define timespecisset(tvp)      ((tvp)->tv_sec || (tvp)->tv_nsec)
  72 #define timespeccmp(tvp, uvp, cmp)                                      \
  73         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
  74             ((tvp)->tv_nsec cmp (uvp)->tv_nsec) :                       \
  75             ((tvp)->tv_sec cmp (uvp)->tv_sec))
  76 #define timespecadd(vvp, uvp)                                           \
  77         do {                                                            \
  78                 (vvp)->tv_sec += (uvp)->tv_sec;                         \
  79                 (vvp)->tv_nsec += (uvp)->tv_nsec;                       \
  80                 if ((vvp)->tv_nsec >= 1000000000) {                     \
  81                         (vvp)->tv_sec++;                                \
  82                         (vvp)->tv_nsec -= 1000000000;                   \
  83                 }                                                       \
  84         } while (0)
  85 #define timespecsub(vvp, uvp)                                           \
  86         do {                                                            \
  87                 (vvp)->tv_sec -= (uvp)->tv_sec;                         \
  88                 (vvp)->tv_nsec -= (uvp)->tv_nsec;                       \
  89                 if ((vvp)->tv_nsec < 0) {                               \
  90                         (vvp)->tv_sec--;                                \
  91                         (vvp)->tv_nsec += 1000000000;                   \
  92                 }                                                       \
  93         } while (0)
  94
  95 /* Operations on timevals. */
  96
  97 #define timevalclear(tvp)               ((tvp)->tv_sec = (tvp)->tv_usec = 0)
  98 #define timevalisset(tvp)               ((tvp)->tv_sec || (tvp)->tv_usec)
  99 #define timevalcmp(tvp, uvp, cmp)                                       \
 100         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
 101             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
 102             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 103
 104 /* timevaladd and timevalsub are not inlined */
 105
 106 #endif /* _KERNEL */
 107
 108 #ifndef _KERNEL                 /* NetBSD/OpenBSD compatible interfaces */
 109
 110 #define timerclear(tvp)         ((tvp)->tv_sec = (tvp)->tv_usec = 0)
 111 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
 112 #define timercmp(tvp, uvp, cmp)                                 \
 113         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
 114             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
 115             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 116 #define timeradd(tvp, uvp, vvp)                                         \
 117         do {                                                            \
 118                 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;          \
 119                 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;       \
 120                 if ((vvp)->tv_usec >= 1000000) {                        \
 121                         (vvp)->tv_sec++;                                \
 122                         (vvp)->tv_usec -= 1000000;                      \
 123                 }                                                       \
 124         } while (0)
 125 #define timersub(tvp, uvp, vvp)                                         \
 126         do {                                                            \
 127                 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;          \
 128                 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;       \
 129                 if ((vvp)->tv_usec < 0) {                               \
 130                         (vvp)->tv_sec--;                                \
 131                         (vvp)->tv_usec += 1000000;                      \
 132                 }                                                       \
 133         } while (0)
 134 #endif
 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  * Getkerninfo clock information structure
 151  */
 152 struct clockinfo {
 153         int     hz;             /* clock frequency */
 154         int     tick;           /* micro-seconds per hz tick */
 155         int     tickadj;        /* clock skew rate for adjtime() */
 156         int     stathz;         /* statistics clock frequency */
 157         int     profhz;         /* profiling clock frequency */
 158 };
 159
 160 /* CLOCK_REALTIME and TIMER_ABSTIME are supposed to be in time.h */
 161
 162 #ifndef CLOCK_REALTIME
 163 #define CLOCK_REALTIME          0
 164 #endif
 165 #define CLOCK_VIRTUAL           1
 166 #define CLOCK_PROF              2
 167 #define CLOCK_MONOTONIC         4
 168
 169 #define CLOCK_UPTIME            5       /* from freebsd */
 170 #define CLOCK_UPTIME_PRECISE    7       /* from freebsd */
 171 #define CLOCK_UPTIME_FAST       8       /* from freebsd */
 172 #define CLOCK_REALTIME_PRECISE  9       /* from freebsd */
 173 #define CLOCK_REALTIME_FAST     10      /* from freebsd */
 174 #define CLOCK_MONOTONIC_PRECISE 11      /* from freebsd */
 175 #define CLOCK_MONOTONIC_FAST    12      /* from freebsd */
 176 #define CLOCK_SECOND            13      /* from freebsd */
 177 #define CLOCK_THREAD_CPUTIME_ID         14
 178 #define CLOCK_PROCESS_CPUTIME_ID        15
 179
 180 #define TIMER_RELTIME   0x0     /* relative timer */
 181 #ifndef TIMER_ABSTIME
 182 #define TIMER_ABSTIME   0x1     /* absolute timer */
 183 #endif
 184
 185 #ifdef _KERNEL
 186
 187 extern time_t   time_second;            /* simple time_t (can step) */
 188 extern time_t   time_uptime;            /* monotonic simple uptime / seconds */
 189 extern int64_t  ntp_tick_permanent;
 190 extern int64_t  ntp_tick_acc;
 191 extern int64_t  ntp_delta;
 192 extern int64_t  ntp_big_delta;
 193 extern int32_t  ntp_tick_delta;
 194 extern int32_t  ntp_default_tick_delta;
 195 extern time_t   ntp_leap_second;
 196 extern int      ntp_leap_insert;
 197
 198 void    initclocks_pcpu(void);
 199 void    getmicrouptime (struct timeval *tv);
 200 void    getmicrotime (struct timeval *tv);
 201 void    getnanouptime (struct timespec *tv);
 202 void    getnanotime (struct timespec *tv);
 203 int     itimerdecr (struct itimerval *itp, int usec);
 204 int     itimerfix (struct timeval *tv);
 205 int     itimespecfix (struct timespec *ts);
 206 int     ppsratecheck (struct timeval *, int *, int usec);
 207 int     ratecheck (struct timeval *, const struct timeval *);
 208 void    microuptime (struct timeval *tv);
 209 void    microtime (struct timeval *tv);
 210 void    nanouptime (struct timespec *ts);
 211 void    nanotime (struct timespec *ts);
 212 time_t  get_approximate_time_t(void);
 213 void    set_timeofday(struct timespec *ts);
 214 void    kern_adjtime(int64_t, int64_t *);
 215 void    kern_reladjtime(int64_t);
 216 void    timevaladd (struct timeval *, const struct timeval *);
 217 void    timevalsub (struct timeval *, const struct timeval *);
 218 int     tvtohz_high (struct timeval *);
 219 int     tvtohz_low (struct timeval *);
 220 int     tstohz_high (struct timespec *);
 221 int     tstohz_low (struct timespec *);
 222 int64_t tsc_get_target(int ns);
 223 int     tsc_test_target(int64_t target);
 224 void    tsc_delay(int ns);
 225 int     nanosleep1(struct timespec *rqt, struct timespec *rmt);
 226
 227 #else /* !_KERNEL */
 228
 229 #include <time.h>
 230 #include <sys/cdefs.h>
 231
 232 #endif /* !_KERNEL */
 233
 234 __BEGIN_DECLS
 235
 236 #if __BSD_VISIBLE
 237 int     adjtime(const struct timeval *, struct timeval *);
 238 int     futimes(int, const struct timeval *);
 239 int     lutimes(const char *, const struct timeval *);
 240 int     settimeofday(const struct timeval *, const struct timezone *);
 241 #endif
 242
 243 #if __XSI_VISIBLE
 244 int     getitimer(int, struct itimerval *);
 245 int     gettimeofday(struct timeval *, struct timezone *);
 246 int     setitimer(int, const struct itimerval *, struct itimerval *);
 247 int     utimes(const char *, const struct timeval *);
 248 #endif
 249
 250 __END_DECLS
 251
 252 #endif /* !_SYS_TIME_H_ */