bsd/sys/time.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  26 /*
  27  * Copyright (c) 1982, 1986, 1993
  28  *      The Regents of the University of California.  All rights reserved.
  29  *
  30  * Redistribution and use in source and binary forms, with or without
  31  * modification, are permitted provided that the following conditions
  32  * are met:
  33  * 1. Redistributions of source code must retain the above copyright
  34  *    notice, this list of conditions and the following disclaimer.
  35  * 2. Redistributions in binary form must reproduce the above copyright
  36  *    notice, this list of conditions and the following disclaimer in the
  37  *    documentation and/or other materials provided with the distribution.
  38  * 3. All advertising materials mentioning features or use of this software
  39  *    must display the following acknowledgement:
  40  *      This product includes software developed by the University of
  41  *      California, Berkeley and its contributors.
  42  * 4. Neither the name of the University nor the names of its contributors
  43  *    may be used to endorse or promote products derived from this software
  44  *    without specific prior written permission.
  45  *
  46  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  47  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  49  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  50  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  52  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  53  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  54  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  55  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  56  * SUCH DAMAGE.
  57  *
  58  *      @(#)time.h      8.2 (Berkeley) 7/10/94
  59  */
  60
  61 #ifndef _SYS_TIME_H_
  62 #define _SYS_TIME_H_
  63
  64 #include <sys/appleapiopts.h>
  65 #include <sys/types.h>
  66
  67 /*
  68  * Structure returned by gettimeofday(2) system call,
  69  * and used in other calls.
  70  */
  71 struct timeval {
  72         int32_t tv_sec;         /* seconds */
  73         int32_t tv_usec;        /* and microseconds */
  74 };
  75
  76 /*
  77  * Structure defined by POSIX.4 to be like a timeval.
  78  */
  79 #ifndef _TIMESPEC_DECLARED
  80 #define _TIMESPEC_DECLARED
  81 struct timespec {
  82         time_t  tv_sec;         /* seconds */
  83         int32_t tv_nsec;        /* and nanoseconds */
  84 };
  85 #endif
  86
  87 #define TIMEVAL_TO_TIMESPEC(tv, ts) {                                   \
  88         (ts)->tv_sec = (tv)->tv_sec;                                    \
  89         (ts)->tv_nsec = (tv)->tv_usec * 1000;                           \
  90 }
  91 #define TIMESPEC_TO_TIMEVAL(tv, ts) {                                   \
  92         (tv)->tv_sec = (ts)->tv_sec;                                    \
  93         (tv)->tv_usec = (ts)->tv_nsec / 1000;                           \
  94 }
  95
  96 struct timezone {
  97         int     tz_minuteswest; /* minutes west of Greenwich */
  98         int     tz_dsttime;     /* type of dst correction */
  99 };
 100 #define DST_NONE        0       /* not on dst */
 101 #define DST_USA         1       /* USA style dst */
 102 #define DST_AUST        2       /* Australian style dst */
 103 #define DST_WET         3       /* Western European dst */
 104 #define DST_MET         4       /* Middle European dst */
 105 #define DST_EET         5       /* Eastern European dst */
 106 #define DST_CAN         6       /* Canada */
 107
 108 #define time_second time.tv_sec
 109
 110 /* Operations on timevals. */
 111 #define timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
 112 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
 113 #define timercmp(tvp, uvp, cmp)                                         \
 114         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
 115             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
 116             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 117 #define timeradd(tvp, uvp, vvp)                                         \
 118         do {                                                            \
 119                 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;          \
 120                 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;       \
 121                 if ((vvp)->tv_usec >= 1000000) {                        \
 122                         (vvp)->tv_sec++;                                \
 123                         (vvp)->tv_usec -= 1000000;                      \
 124                 }                                                       \
 125         } while (0)
 126 #define timersub(tvp, uvp, vvp)                                         \
 127         do {                                                            \
 128                 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;          \
 129                 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;       \
 130                 if ((vvp)->tv_usec < 0) {                               \
 131                         (vvp)->tv_sec--;                                \
 132                         (vvp)->tv_usec += 1000000;                      \
 133                 }                                                       \
 134         } while (0)
 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 #include <sys/cdefs.h>
 161
 162 #ifdef KERNEL
 163 void    microtime __P((struct timeval *tv));
 164 void    microuptime __P((struct timeval *tv));
 165 #define getmicrotime(a)         microtime(a)
 166 #define getmicrouptime(a)       microuptime(a)
 167 void    nanotime __P((struct timespec *ts));
 168 void    nanouptime __P((struct timespec *ts));
 169 #define getnanotime(a)          nanotime(a)
 170 #define getnanouptime(a)        nanouptime(a)
 171 #ifdef __APPLE_API_PRIVATE
 172 int     itimerfix __P((struct timeval *tv));
 173 int     itimerdecr __P((struct itimerval *itp, int usec));
 174 #endif /* __APPLE_API_PRIVATE */
 175
 176 #else /* !KERNEL */
 177 #include <time.h>
 178
 179 #ifndef _POSIX_SOURCE
 180 #include <sys/cdefs.h>
 181
 182 __BEGIN_DECLS
 183 int     adjtime __P((const struct timeval *, struct timeval *));
 184 int     futimes __P((int, const struct timeval *));
 185 int     getitimer __P((int, struct itimerval *));
 186 int     gettimeofday __P((struct timeval *, struct timezone *));
 187 int     setitimer __P((int, const struct itimerval *, struct itimerval *));
 188 int     settimeofday __P((const struct timeval *, const struct timezone *));
 189 int     utimes __P((const char *, const struct timeval *));
 190 __END_DECLS
 191 #endif /* !POSIX */
 192
 193 #endif /* !KERNEL */
 194
 195 #endif /* !_SYS_TIME_H_ */