bsd/sys/time.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  23 /*
  24  * Copyright (c) 1982, 1986, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  *      @(#)time.h      8.2 (Berkeley) 7/10/94
  56  */
  57
  58 #ifndef _SYS_TIME_H_
  59 #define _SYS_TIME_H_
  60
  61 #include <sys/types.h>
  62
  63 #define getmicrouptime(a) microtime(a)
  64 #define getmicrotime(a)   microtime(a)
  65 /*
  66  * Structure returned by gettimeofday(2) system call,
  67  * and used in other calls.
  68  */
  69 struct timeval {
  70         int32_t tv_sec;         /* seconds */
  71         int32_t tv_usec;        /* and microseconds */
  72 };
  73
  74 /*
  75  * Structure defined by POSIX.4 to be like a timeval.
  76  */
  77 struct timespec {
  78         time_t  tv_sec;         /* seconds */
  79         int32_t tv_nsec;        /* and nanoseconds */
  80 };
  81
  82 #define TIMEVAL_TO_TIMESPEC(tv, ts) {                                   \
  83         (ts)->tv_sec = (tv)->tv_sec;                                    \
  84         (ts)->tv_nsec = (tv)->tv_usec * 1000;                           \
  85 }
  86 #define TIMESPEC_TO_TIMEVAL(tv, ts) {                                   \
  87         (tv)->tv_sec = (ts)->tv_sec;                                    \
  88         (tv)->tv_usec = (ts)->tv_nsec / 1000;                           \
  89 }
  90
  91 struct timezone {
  92         int     tz_minuteswest; /* minutes west of Greenwich */
  93         int     tz_dsttime;     /* type of dst correction */
  94 };
  95 #define DST_NONE        0       /* not on dst */
  96 #define DST_USA         1       /* USA style dst */
  97 #define DST_AUST        2       /* Australian style dst */
  98 #define DST_WET         3       /* Western European dst */
  99 #define DST_MET         4       /* Middle European dst */
 100 #define DST_EET         5       /* Eastern European dst */
 101 #define DST_CAN         6       /* Canada */
 102
 103 #define time_second time.tv_sec
 104
 105 /* Operations on timevals. */
 106 #define timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
 107 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
 108 #define timercmp(tvp, uvp, cmp)                                         \
 109         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
 110             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
 111             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 112 #define timeradd(tvp, uvp, vvp)                                         \
 113         do {                                                            \
 114                 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;          \
 115                 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;       \
 116                 if ((vvp)->tv_usec >= 1000000) {                        \
 117                         (vvp)->tv_sec++;                                \
 118                         (vvp)->tv_usec -= 1000000;                      \
 119                 }                                                       \
 120         } while (0)
 121 #define timersub(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 < 0) {                               \
 126                         (vvp)->tv_sec--;                                \
 127                         (vvp)->tv_usec += 1000000;                      \
 128                 }                                                       \
 129         } while (0)
 130
 131 /*
 132  * Names of the interval timers, and structure
 133  * defining a timer setting.
 134  */
 135 #define ITIMER_REAL     0
 136 #define ITIMER_VIRTUAL  1
 137 #define ITIMER_PROF     2
 138
 139 struct  itimerval {
 140         struct  timeval it_interval;    /* timer interval */
 141         struct  timeval it_value;       /* current value */
 142 };
 143
 144 /*
 145  * Getkerninfo clock information structure
 146  */
 147 struct clockinfo {
 148         int     hz;             /* clock frequency */
 149         int     tick;           /* micro-seconds per hz tick */
 150         int     tickadj;        /* clock skew rate for adjtime() */
 151         int     stathz;         /* statistics clock frequency */
 152         int     profhz;         /* profiling clock frequency */
 153 };
 154
 155 #include <sys/cdefs.h>
 156
 157 #ifdef KERNEL
 158 int     itimerfix __P((struct timeval *tv));
 159 int     itimerdecr __P((struct itimerval *itp, int usec));
 160 void    microtime __P((struct timeval *tv));
 161 #else /* !KERNEL */
 162 #include <time.h>
 163
 164 #ifndef _POSIX_SOURCE
 165 #include <sys/cdefs.h>
 166
 167 __BEGIN_DECLS
 168 int     adjtime __P((const struct timeval *, struct timeval *));
 169 int     getitimer __P((int, struct itimerval *));
 170 int     gettimeofday __P((struct timeval *, struct timezone *));
 171 int     setitimer __P((int, const struct itimerval *, struct itimerval *));
 172 int     settimeofday __P((const struct timeval *, const struct timezone *));
 173 int     utimes __P((const char *, const struct timeval *));
 174 __END_DECLS
 175 #endif /* !POSIX */
 176
 177 #endif /* !KERNEL */
 178
 179 #endif /* !_SYS_TIME_H_ */