bsd/sys/time.h

   1 /*
   2  * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
  29 /*
  30  * Copyright (c) 1982, 1986, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  41  * 3. All advertising materials mentioning features or use of this software
  42  *    must display the following acknowledgement:
  43  *      This product includes software developed by the University of
  44  *      California, Berkeley and its contributors.
  45  * 4. Neither the name of the University nor the names of its contributors
  46  *    may be used to endorse or promote products derived from this software
  47  *    without specific prior written permission.
  48  *
  49  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  50  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  51  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  52  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  53  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  54  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  55  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  56  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  57  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  58  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  59  * SUCH DAMAGE.
  60  *
  61  *      @(#)time.h      8.2 (Berkeley) 7/10/94
  62  */
  63
  64 #ifndef _SYS_TIME_H_
  65 #define _SYS_TIME_H_
  66
  67 #include <sys/cdefs.h>
  68 #include <sys/_types.h>
  69 #ifdef KERNEL
  70 #include <machine/types.h>      /* user_time_t */
  71 #else /* !KERNEL */
  72 #include <Availability.h>
  73 #endif /* KERNEL */
  74
  75 /*
  76  * [XSI] The fd_set type shall be defined as described in <sys/select.h>.
  77  * The timespec structure shall be defined as described in <time.h>
  78  */
  79 #define __need_fd_set
  80 #define __need_struct_timespec
  81 #define __need_struct_timeval
  82 #ifdef KERNEL
  83 #define __need_struct_user_timespec
  84 #define __need_struct_user32_timespec
  85 #define __need_struct_user64_timespec
  86 #define __need_struct_user_timeval
  87 #define __need_struct_user32_timeval
  88 #define __need_struct_user64_timeval
  89 #define __need_struct_user32_itimerval
  90 #define __need_struct_user64_itimerval
  91 #endif /* KERNEL */
  92 #include <sys/_structs.h>
  93
  94 #ifndef _TIME_T
  95 #define _TIME_T
  96 typedef __darwin_time_t time_t;
  97 #endif
  98
  99 #ifndef _SUSECONDS_T
 100 #define _SUSECONDS_T
 101 typedef __darwin_suseconds_t    suseconds_t;
 102 #endif
 103
 104 /*
 105  * Structure used as a parameter by getitimer(2) and setitimer(2) system
 106  * calls.
 107  */
 108 struct  itimerval {
 109         struct  timeval it_interval;    /* timer interval */
 110         struct  timeval it_value;       /* current value */
 111 };
 112
 113 /*
 114  * Names of the interval timers, and structure
 115  * defining a timer setting.
 116  */
 117 #define ITIMER_REAL     0
 118 #define ITIMER_VIRTUAL  1
 119 #define ITIMER_PROF     2
 120
 121 /*
 122  * Select uses bit masks of file descriptors in longs.  These macros
 123  * manipulate such bit fields (the filesystem macros use chars).  The
 124  * extra protection here is to permit application redefinition above
 125  * the default size.
 126  */
 127 #ifndef FD_SETSIZE
 128 #define FD_SETSIZE      __DARWIN_FD_SETSIZE
 129 #endif  /* FD_SETSIZE */
 130 #ifndef FD_SET
 131 #define FD_SET(n, p)    __DARWIN_FD_SET(n, p)
 132 #endif  /* FD_SET */
 133 #ifndef FD_CLR
 134 #define FD_CLR(n,p)     __DARWIN_FD_CLR(n, p)
 135 #endif  /* FD_CLR */
 136 #ifndef FD_ISSET
 137 #define FD_ISSET(n, p)  __DARWIN_FD_ISSET(n, p)
 138 #endif  /* FD_ISSET */
 139 #ifndef FD_ZERO
 140 #define FD_ZERO(p)      __DARWIN_FD_ZERO(p)
 141 #endif  /* FD_ZERO */
 142
 143 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 144
 145 #ifndef FD_COPY
 146 #define FD_COPY(f, t)   __DARWIN_FD_COPY(f, t)
 147 #endif  /* FD_COPY */
 148
 149 #define TIMEVAL_TO_TIMESPEC(tv, ts) {                                   \
 150         (ts)->tv_sec = (tv)->tv_sec;                                    \
 151         (ts)->tv_nsec = (tv)->tv_usec * 1000;                           \
 152 }
 153 #define TIMESPEC_TO_TIMEVAL(tv, ts) {                                   \
 154         (tv)->tv_sec = (ts)->tv_sec;                                    \
 155         (tv)->tv_usec = (ts)->tv_nsec / 1000;                           \
 156 }
 157
 158 struct timezone {
 159         int     tz_minuteswest; /* minutes west of Greenwich */
 160         int     tz_dsttime;     /* type of dst correction */
 161 };
 162 #define DST_NONE        0       /* not on dst */
 163 #define DST_USA         1       /* USA style dst */
 164 #define DST_AUST        2       /* Australian style dst */
 165 #define DST_WET         3       /* Western European dst */
 166 #define DST_MET         4       /* Middle European dst */
 167 #define DST_EET         5       /* Eastern European dst */
 168 #define DST_CAN         6       /* Canada */
 169
 170 /* Operations on timevals. */
 171 #define timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
 172 #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
 173 #define timercmp(tvp, uvp, cmp)                                         \
 174         (((tvp)->tv_sec == (uvp)->tv_sec) ?                             \
 175             ((tvp)->tv_usec cmp (uvp)->tv_usec) :                       \
 176             ((tvp)->tv_sec cmp (uvp)->tv_sec))
 177 #define timeradd(tvp, uvp, vvp)                                         \
 178         do {                                                            \
 179                 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec;          \
 180                 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec;       \
 181                 if ((vvp)->tv_usec >= 1000000) {                        \
 182                         (vvp)->tv_sec++;                                \
 183                         (vvp)->tv_usec -= 1000000;                      \
 184                 }                                                       \
 185         } while (0)
 186 #define timersub(tvp, uvp, vvp)                                         \
 187         do {                                                            \
 188                 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec;          \
 189                 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec;       \
 190                 if ((vvp)->tv_usec < 0) {                               \
 191                         (vvp)->tv_sec--;                                \
 192                         (vvp)->tv_usec += 1000000;                      \
 193                 }                                                       \
 194         } while (0)
 195
 196 #define timevalcmp(l, r, cmp)   timercmp(l, r, cmp) /* freebsd */
 197
 198 /*
 199  * Getkerninfo clock information structure
 200  */
 201 struct clockinfo {
 202         int     hz;             /* clock frequency */
 203         int     tick;           /* micro-seconds per hz tick */
 204         int     tickadj;        /* clock skew rate for adjtime() */
 205         int     stathz;         /* statistics clock frequency */
 206         int     profhz;         /* profiling clock frequency */
 207 };
 208 #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 209
 210 #ifdef KERNEL
 211
 212 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 213 __BEGIN_DECLS
 214 void    microtime(struct timeval *tv);
 215 void    microuptime(struct timeval *tv);
 216 #define getmicrotime(a)         microtime(a)
 217 #define getmicrouptime(a)       microuptime(a)
 218 void    nanotime(struct timespec *ts);
 219 void    nanouptime(struct timespec *ts);
 220 #define getnanotime(a)          nanotime(a)
 221 #define getnanouptime(a)        nanouptime(a)
 222 void    timevaladd(struct timeval *t1, struct timeval *t2);
 223 void    timevalsub(struct timeval *t1, struct timeval *t2);
 224 void    timevalfix(struct timeval *t1);
 225 #ifdef  BSD_KERNEL_PRIVATE
 226 time_t  boottime_sec(void);
 227 void    inittodr(time_t base) __attribute__((section("__TEXT, initcode")));
 228 #endif /* BSD_KERNEL_PRIVATE */
 229
 230 __END_DECLS
 231
 232 #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 233
 234 #else /* !KERNEL */
 235
 236 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 237 #include <time.h>
 238 #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 239
 240 __BEGIN_DECLS
 241
 242 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 243 int     adjtime(const struct timeval *, struct timeval *);
 244 int     futimes(int, const struct timeval *);
 245 int     lutimes(const char *, const struct timeval *) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
 246 int     settimeofday(const struct timeval *, const struct timezone *);
 247 #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 248
 249 int     getitimer(int, struct itimerval *);
 250 int     gettimeofday(struct timeval * __restrict, void * __restrict);
 251
 252 #include <sys/_select.h>        /* select() prototype */
 253
 254 int     setitimer(int, const struct itimerval * __restrict,
 255                 struct itimerval * __restrict);
 256 int     utimes(const char *, const struct timeval *);
 257
 258 __END_DECLS
 259
 260 #endif /* !KERNEL */
 261
 262 #endif /* !_SYS_TIME_H_ */