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   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  */
  31 
  32 #ifndef _SYS_TIME_H_
  33 #define _SYS_TIME_H_
  34 
  35 #include <sys/types.h>
  36 
  37 /*
  38  * Structure returned by gettimeofday(2) system call,
  39  * and used in other calls.
  40  */
  41 struct timeval {
  42         long    tv_sec;         /* seconds */
  43         long    tv_usec;        /* and microseconds */
  44 };
  45 
  46 /*
  47  * Structure defined by POSIX.4 to be like a timeval.
  48  */
  49 struct timespec {
  50         time_t  ts_sec;         /* seconds */
  51         long    ts_nsec;        /* and nanoseconds */
  52 };
  53 
  54 #define TIMEVAL_TO_TIMESPEC(tv, ts) {                                   \
  55         (ts)->ts_sec = (tv)->tv_sec;                                    \
  56         (ts)->ts_nsec = (tv)->tv_usec * 1000;                           \
  57 }
  58 #define TIMESPEC_TO_TIMEVAL(tv, ts) {                                   \
  59         (tv)->tv_sec = (ts)->ts_sec;                                    \
  60         (tv)->tv_usec = (ts)->ts_nsec / 1000;                           \
  61 }
  62 
  63 struct timezone {
  64         int     tz_minuteswest; /* minutes west of Greenwich */
  65         int     tz_dsttime;     /* type of dst correction */
  66 };
  67 
  68 #define DST_NONE        0       /* not on dst */
  69 #define DST_USA         1       /* USA style dst */
  70 #define DST_AUST        2       /* Australian style dst */
  71 #define DST_WET         3       /* Western European dst */
  72 #define DST_MET         4       /* Middle European dst */
  73 #define DST_EET         5       /* Eastern European dst */
  74 #define DST_CAN         6       /* Canada */
  75 
  76 /* Operations on timevals. */
  77 #define timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
  78 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
  79 #define timercmp(tvp, uvp, cmp)                                         \
  80         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
  81             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
  82             ((tvp)->tv_sec cmp (uvp)->tv_sec))
  83 
  84 /*
  85  * Names of the interval timers, and structure
  86  * defining a timer setting.
  87  */
  88 #define ITIMER_REAL     0
  89 #define ITIMER_VIRTUAL  1
  90 #define ITIMER_PROF     2
  91 
  92 struct  itimerval {
  93         struct  timeval it_interval;    /* timer interval */
  94         struct  timeval it_value;       /* current value */
  95 };
  96 
  97 /*
  98  * Getkerninfo clock information structure
  99  */
 100 struct clockinfo {
 101         int     hz;             /* clock frequency */
 102         int     tick;           /* micro-seconds per hz tick */
 103         int     stathz;         /* statistics clock frequency */
 104         int     profhz;         /* profiling clock frequency */
 105 };
 106 
 107 #ifndef KERNEL
 108 #include <time.h>
 109 
 110 #ifndef _POSIX_SOURCE
 111 #include <sys/cdefs.h>
 112 
 113 __BEGIN_DECLS
 114 int     gettimeofday(struct timeval *, struct timezone *);
 115 #if 0
 116 int     adjtime(const struct timeval *, struct timeval *);
 117 int     getitimer(int, struct itimerval *);
 118 int     setitimer(int, const struct itimerval *, struct itimerval *);
 119 int     settimeofday(const struct timeval *, const struct timezone *);
 120 int     utimes(const char *, const struct timeval *);
 121 #endif
 122 __END_DECLS
 123 #endif /* !POSIX */
 124 #endif /* !KERNEL */
 125 
 126 
 127 #endif /* !_SYS_TIME_H_ */

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