time.h (8626B) - Raw
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 #include <Availability.h> 70 71 72 /* 73 * [XSI] The fd_set type shall be defined as described in <sys/select.h>. 74 * The timespec structure shall be defined as described in <time.h> 75 */ 76 #include <sys/_types/_fd_def.h> 77 #include <sys/_types/_timespec.h> 78 #include <sys/_types/_timeval.h> 79 80 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 81 #include <sys/_types/_timeval64.h> 82 #endif /* !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) */ 83 84 85 #include <sys/_types/_time_t.h> 86 #include <sys/_types/_suseconds_t.h> 87 88 /* 89 * Structure used as a parameter by getitimer(2) and setitimer(2) system 90 * calls. 91 */ 92 struct itimerval { 93 struct timeval it_interval; /* timer interval */ 94 struct timeval it_value; /* current value */ 95 }; 96 97 /* 98 * Names of the interval timers, and structure 99 * defining a timer setting. 100 */ 101 #define ITIMER_REAL 0 102 #define ITIMER_VIRTUAL 1 103 #define ITIMER_PROF 2 104 105 /* 106 * Select uses bit masks of file descriptors in longs. These macros 107 * manipulate such bit fields (the filesystem macros use chars). The 108 * extra protection here is to permit application redefinition above 109 * the default size. 110 */ 111 #include <sys/_types/_fd_setsize.h> 112 #include <sys/_types/_fd_set.h> 113 #include <sys/_types/_fd_clr.h> 114 #include <sys/_types/_fd_isset.h> 115 #include <sys/_types/_fd_zero.h> 116 117 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 118 119 #include <sys/_types/_fd_copy.h> 120 121 #define TIMEVAL_TO_TIMESPEC(tv, ts) { \ 122 (ts)->tv_sec = (tv)->tv_sec; \ 123 (ts)->tv_nsec = (tv)->tv_usec * 1000; \ 124 } 125 #define TIMESPEC_TO_TIMEVAL(tv, ts) { \ 126 (tv)->tv_sec = (ts)->tv_sec; \ 127 (tv)->tv_usec = (__darwin_suseconds_t)((ts)->tv_nsec / 1000); \ 128 } 129 130 struct timezone { 131 int tz_minuteswest; /* minutes west of Greenwich */ 132 int tz_dsttime; /* type of dst correction */ 133 }; 134 #define DST_NONE 0 /* not on dst */ 135 #define DST_USA 1 /* USA style dst */ 136 #define DST_AUST 2 /* Australian style dst */ 137 #define DST_WET 3 /* Western European dst */ 138 #define DST_MET 4 /* Middle European dst */ 139 #define DST_EET 5 /* Eastern European dst */ 140 #define DST_CAN 6 /* Canada */ 141 142 /* Operations on timevals. */ 143 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0 144 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) 145 #define timercmp(tvp, uvp, cmp) \ 146 (((tvp)->tv_sec == (uvp)->tv_sec) ? \ 147 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \ 148 ((tvp)->tv_sec cmp (uvp)->tv_sec)) 149 #define timeradd(tvp, uvp, vvp) \ 150 do { \ 151 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \ 152 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \ 153 if ((vvp)->tv_usec >= 1000000) { \ 154 (vvp)->tv_sec++; \ 155 (vvp)->tv_usec -= 1000000; \ 156 } \ 157 } while (0) 158 #define timersub(tvp, uvp, vvp) \ 159 do { \ 160 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \ 161 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \ 162 if ((vvp)->tv_usec < 0) { \ 163 (vvp)->tv_sec--; \ 164 (vvp)->tv_usec += 1000000; \ 165 } \ 166 } while (0) 167 168 #define timevalcmp(l, r, cmp) timercmp(l, r, cmp) /* freebsd */ 169 170 /* 171 * Getkerninfo clock information structure 172 */ 173 struct clockinfo { 174 int hz; /* clock frequency */ 175 int tick; /* micro-seconds per hz tick */ 176 int tickadj; /* clock skew rate for adjtime() */ 177 int stathz; /* statistics clock frequency */ 178 int profhz; /* profiling clock frequency */ 179 }; 180 #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */ 181 182 183 184 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 185 #include <time.h> 186 #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */ 187 188 __BEGIN_DECLS 189 190 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 191 int adjtime(const struct timeval *, struct timeval *); 192 int futimes(int, const struct timeval *); 193 int lutimes(const char *, const struct timeval *) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0); 194 int settimeofday(const struct timeval *, const struct timezone *); 195 #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */ 196 197 int getitimer(int, struct itimerval *); 198 int gettimeofday(struct timeval * __restrict, void * __restrict); 199 200 __END_DECLS 201 202 #include <sys/_select.h> /* select() prototype */ 203 204 __BEGIN_DECLS 205 206 int setitimer(int, const struct itimerval * __restrict, 207 struct itimerval * __restrict); 208 int utimes(const char *, const struct timeval *); 209 210 __END_DECLS 211 212 213 214 #endif /* !_SYS_TIME_H_ */