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/_timeval.h>
  46 #include <sys/select.h>
  47
  48 #ifndef _TIMESPEC_DECLARED
  49 #define _TIMESPEC_DECLARED
  50 struct timespec {
  51         time_t  tv_sec;         /* seconds */
  52         long    tv_nsec;        /* and nanoseconds */
  53 };
  54 #endif
  55
  56 #define TIMEVAL_TO_TIMESPEC(tv, ts)                                     \
  57         do {                                                            \
  58                 (ts)->tv_sec = (tv)->tv_sec;                            \
  59                 (ts)->tv_nsec = (tv)->tv_usec * 1000;                   \
  60         } while (0)
  61 #define TIMESPEC_TO_TIMEVAL(tv, ts)                                     \
  62         do {                                                            \
  63                 (tv)->tv_sec = (ts)->tv_sec;                            \
  64                 (tv)->tv_usec = (ts)->tv_nsec / 1000;                   \
  65         } while (0)
  66
  67 struct timezone {
  68         int     tz_minuteswest; /* minutes west of Greenwich */
  69         int     tz_dsttime;     /* type of dst correction */
  70 };
  71 #define DST_NONE        0       /* not on dst */
  72 #define DST_USA         1       /* USA style dst */
  73 #define DST_AUST        2       /* Australian style dst */
  74 #define DST_WET         3       /* Western European dst */
  75 #define DST_MET         4       /* Middle European dst */
  76 #define DST_EET         5       /* Eastern European dst */
  77 #define DST_CAN         6       /* Canada */
  78
  79 #ifdef _KERNEL
  80
  81 /* Operations on timespecs */
  82 #define timespecclear(tvp)      ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
  83 #define timespecisset(tvp)      ((tvp)->tv_sec || (tvp)->tv_nsec)
  84 #define timespeccmp(tvp, uvp, cmp)                                      \
  85         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
  86             ((tvp)->tv_nsec cmp (uvp)->tv_nsec) :                       \
  87             ((tvp)->tv_sec cmp (uvp)->tv_sec))
  88 #define timespecadd(vvp, uvp)                                           \
  89         do {                                                            \
  90                 (vvp)->tv_sec += (uvp)->tv_sec;                         \
  91                 (vvp)->tv_nsec += (uvp)->tv_nsec;                       \
  92                 if ((vvp)->tv_nsec >= 1000000000) {                     \
  93                         (vvp)->tv_sec++;                                \
  94                         (vvp)->tv_nsec -= 1000000000;                   \
  95                 }                                                       \
  96         } while (0)
  97 #define timespecsub(vvp, uvp)                                           \
  98         do {                                                            \
  99                 (vvp)->tv_sec -= (uvp)->tv_sec;                         \
 100                 (vvp)->tv_nsec -= (uvp)->tv_nsec;                       \
 101                 if ((vvp)->tv_nsec < 0) {                               \
 102                         (vvp)->tv_sec--;                                \
 103                         (vvp)->tv_nsec += 1000000000;                   \
 104                 }                                                       \
 105         } while (0)
 106
 107 /* Operations on timevals. */
 108
 109 #define timevalclear(tvp)               (tvp)->tv_sec = (tvp)->tv_usec = 0
 110 #define timevalisset(tvp)               ((tvp)->tv_sec || (tvp)->tv_usec)
 111 #define timevalcmp(tvp, uvp, cmp)                                       \
 112         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
 113             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
 114             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 115
 116 /* timevaladd and timevalsub are not inlined */
 117
 118 #endif /* _KERNEL */
 119
 120 #ifndef _KERNEL                 /* NetBSD/OpenBSD compatible interfaces */
 121
 122 #define timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
 123 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
 124 #define timercmp(tvp, uvp, cmp)                                 \
 125         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
 126             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
 127             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 128 #define timeradd(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 >= 1000000) {                        \
 133                         (vvp)->tv_sec++;                                \
 134                         (vvp)->tv_usec -= 1000000;                      \
 135                 }                                                       \
 136         } while (0)
 137 #define timersub(tvp, uvp, vvp)                                         \
 138         do {                                                            \
 139                 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;          \
 140                 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;       \
 141                 if ((vvp)->tv_usec < 0) {                               \
 142                         (vvp)->tv_sec--;                                \
 143                         (vvp)->tv_usec += 1000000;                      \
 144                 }                                                       \
 145         } while (0)
 146 #endif
 147
 148 /*
 149  * Names of the interval timers, and structure
 150  * defining a timer setting.
 151  */
 152 #define ITIMER_REAL     0
 153 #define ITIMER_VIRTUAL  1
 154 #define ITIMER_PROF     2
 155
 156 struct  itimerval {
 157         struct  timeval it_interval;    /* timer interval */
 158         struct  timeval it_value;       /* current value */
 159 };
 160
 161 /*
 162  * Getkerninfo clock information structure
 163  *
 164  * XXX Should be removed, use kinfo_clockinfo insteada.
 165  */
 166 struct clockinfo {
 167         int     hz;             /* clock frequency */
 168         int     tick;           /* micro-seconds per hz tick */
 169         int     tickadj;        /* clock skew rate for adjtime() */
 170         int     stathz;         /* statistics clock frequency */
 171         int     profhz;         /* profiling clock frequency */
 172 };
 173
 174 /* CLOCK_REALTIME and TIMER_ABSTIME are supposed to be in time.h */
 175
 176 #ifndef CLOCK_REALTIME
 177 #define CLOCK_REALTIME  0
 178 #endif
 179 #define CLOCK_VIRTUAL   1
 180 #define CLOCK_PROF      2
 181 #define CLOCK_MONOTONIC 4
 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 /*
 191  * For krateprintf()
 192  */
 193 struct krate {
 194         int freq;
 195         int ticks;
 196         int count;
 197 };
 198
 199 #endif
 200
 201 #ifdef _KERNEL
 202 extern time_t   time_second;
 203 extern int64_t  ntp_tick_permanent;
 204 extern int64_t  ntp_tick_acc;
 205 extern int64_t  ntp_delta;
 206 extern int64_t  ntp_big_delta;
 207 extern int32_t  ntp_tick_delta;
 208 extern int32_t  ntp_default_tick_delta;
 209 extern time_t   ntp_leap_second;
 210 extern int      ntp_leap_insert;
 211
 212 void    initclocks_pcpu(void);
 213 void    getmicrouptime (struct timeval *tv);
 214 void    getmicrotime (struct timeval *tv);
 215 void    getnanouptime (struct timespec *tv);
 216 void    getnanotime (struct timespec *tv);
 217 int     itimerdecr (struct itimerval *itp, int usec);
 218 int     itimerfix (struct timeval *tv);
 219 int     ppsratecheck (struct timeval *, int *, int usec);
 220 int     ratecheck (struct timeval *, const struct timeval *);
 221 void    microuptime (struct timeval *tv);
 222 void    microtime (struct timeval *tv);
 223 void    nanouptime (struct timespec *ts);
 224 void    nanotime (struct timespec *ts);
 225 time_t  get_approximate_time_t(void);
 226 void    set_timeofday(struct timespec *ts);
 227 void    kern_adjtime(int64_t, int64_t *);
 228 void    kern_reladjtime(int64_t);
 229 void    timevaladd (struct timeval *, const struct timeval *);
 230 void    timevalsub (struct timeval *, const struct timeval *);
 231 int     tvtohz_high (struct timeval *);
 232 int     tvtohz_low (struct timeval *);
 233
 234 #else /* !_KERNEL */
 235
 236 #include <time.h>
 237 #include <sys/cdefs.h>
 238
 239 #endif /* !_KERNEL */
 240
 241 __BEGIN_DECLS
 242 int     adjtime (const struct timeval *, struct timeval *);
 243 int     futimes (int, const struct timeval *);
 244 int     getitimer (int, struct itimerval *);
 245 int     gettimeofday (struct timeval *, struct timezone *);
 246 int     lutimes (const char *, const struct timeval *);
 247 int     setitimer (int, const struct itimerval *, struct itimerval *);
 248 int     settimeofday (const struct timeval *, const struct timezone *);
 249 int     utimes (const char *, const struct timeval *);
 250 __END_DECLS
 251
 252
 253 #endif /* !_SYS_TIME_H_ */