include/time.h

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  * (c) UNIX System Laboratories, Inc.
   5  * All or some portions of this file are derived from material licensed
   6  * to the University of California by American Telephone and Telegraph
   7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   8  * the permission of UNIX System Laboratories, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  *      @(#)time.h      8.3 (Berkeley) 1/21/94
  35  */
  36
  37 /*
  38  * $FreeBSD: head/include/time.h 245428 2013-01-14 18:01:19Z dim $
  39  */
  40
  41 #ifndef _TIME_H_
  42 #define _TIME_H_
  43
  44 #include <sys/cdefs.h>
  45 #include <sys/_null.h>
  46 #include <sys/stdint.h>
  47
  48 #if __POSIX_VISIBLE > 0 && __POSIX_VISIBLE < 200112 || __BSD_VISIBLE
  49 /*
  50  * Frequency of the clock ticks reported by times().  Deprecated - use
  51  * sysconf(_SC_CLK_TCK) instead.  (Removed in 1003.1-2001.)
  52  */
  53 #define CLK_TCK         128
  54 #endif
  55
  56 /* Frequency of the clock ticks reported by clock().  */
  57 #define CLOCKS_PER_SEC  ((clock_t)128)
  58
  59 #ifndef _CLOCK_T_DECLARED
  60 #define _CLOCK_T_DECLARED
  61 typedef __clock_t       clock_t;
  62 #endif
  63
  64 #ifndef _TIME_T_DECLARED
  65 #define _TIME_T_DECLARED
  66 typedef __time_t        time_t;
  67 #endif
  68
  69 #ifndef _SIZE_T_DECLARED
  70 #define _SIZE_T_DECLARED
  71 typedef __size_t        size_t;
  72 #endif
  73
  74 #if __POSIX_VISIBLE >= 199309
  75 /*
  76  * New in POSIX 1003.1b-1993.
  77  */
  78 #include <sys/timespec.h>
  79 #ifndef _CLOCKID_T_DECLARED
  80 #define _CLOCKID_T_DECLARED
  81 typedef __clockid_t     clockid_t;
  82 #endif
  83
  84 #ifndef _TIMER_T_DECLARED
  85 #define _TIMER_T_DECLARED
  86 typedef __timer_t       timer_t;
  87 #endif
  88 #elif __ISO_C_VISIBLE >= 2011
  89 #include <sys/_timespec.h>
  90 #endif /* __POSIX_VISIBLE >= 199309 */
  91
  92 #if __POSIX_VISIBLE >= 200112
  93 #ifndef _PID_T_DECLARED
  94 #define _PID_T_DECLARED
  95 typedef __pid_t         pid_t;
  96 #endif
  97 #endif
  98
  99 #if __BSD_VISIBLE
 100 #ifndef _LWPID_T_DECLARED
 101 #define _LWPID_T_DECLARED
 102 typedef __pid_t         lwpid_t;        /* light weight process id */
 103 #endif
 104 #endif
 105
 106 /* These macros are also in sys/time.h. */
 107 #if !defined(CLOCK_REALTIME) && __POSIX_VISIBLE >= 199309
 108 #define CLOCK_REALTIME          0
 109 #ifdef __BSD_VISIBLE
 110 #define CLOCK_VIRTUAL           1
 111 #define CLOCK_PROF              2
 112 #endif
 113 #define CLOCK_MONOTONIC         4
 114 #define CLOCK_UPTIME            5       /* FreeBSD-specific. */
 115 #define CLOCK_UPTIME_PRECISE    7       /* FreeBSD-specific. */
 116 #define CLOCK_UPTIME_FAST       8       /* FreeBSD-specific. */
 117 #define CLOCK_REALTIME_PRECISE  9       /* FreeBSD-specific. */
 118 #define CLOCK_REALTIME_FAST     10      /* FreeBSD-specific. */
 119 #define CLOCK_MONOTONIC_PRECISE 11      /* FreeBSD-specific. */
 120 #define CLOCK_MONOTONIC_FAST    12      /* FreeBSD-specific. */
 121 #define CLOCK_SECOND            13      /* FreeBSD-specific. */
 122 #define CLOCK_THREAD_CPUTIME_ID 14
 123 #define CLOCK_PROCESS_CPUTIME_ID        15
 124 #endif /* !defined(CLOCK_REALTIME) && __POSIX_VISIBLE >= 199309 */
 125
 126 #if !defined(TIMER_ABSTIME) && __POSIX_VISIBLE >= 199309
 127 #if __BSD_VISIBLE
 128 #define TIMER_RELTIME   0x0     /* relative timer */
 129 #endif
 130 #define TIMER_ABSTIME   0x1     /* absolute timer */
 131 #endif /* !defined(TIMER_ABSTIME) && __POSIX_VISIBLE >= 199309 */
 132
 133 #if __ISO_C_VISIBLE >= 2011
 134 /* for timespec_get() */
 135 #define TIME_UTC        1
 136 #endif
 137
 138 struct tm {
 139         int     tm_sec;         /* seconds after the minute [0-60] */
 140         int     tm_min;         /* minutes after the hour [0-59] */
 141         int     tm_hour;        /* hours since midnight [0-23] */
 142         int     tm_mday;        /* day of the month [1-31] */
 143         int     tm_mon;         /* months since January [0-11] */
 144         int     tm_year;        /* years since 1900 */
 145         int     tm_wday;        /* days since Sunday [0-6] */
 146         int     tm_yday;        /* days since January 1 [0-365] */
 147         int     tm_isdst;       /* Daylight Savings Time flag */
 148         long    tm_gmtoff;      /* offset from UTC in seconds */
 149         char    *tm_zone;       /* timezone abbreviation */
 150 };
 151
 152 #if __POSIX_VISIBLE
 153 extern char *tzname[];
 154 #endif
 155
 156 __BEGIN_DECLS
 157 char *asctime(const struct tm *);
 158 clock_t clock(void);
 159 char *ctime(const time_t *);
 160 double difftime(time_t, time_t);
 161 #if 0 /* XXX missing */
 162 struct tm *getdate(const char *);
 163 #endif
 164 struct tm *gmtime(const time_t *);
 165 struct tm *localtime(const time_t *);
 166 time_t mktime(struct tm *);
 167 size_t strftime(char * __restrict, size_t, const char * __restrict,
 168     const struct tm * __restrict);
 169 time_t time(time_t *);
 170
 171 #if __POSIX_VISIBLE
 172 void tzset(void);
 173 #endif
 174
 175 #if __POSIX_VISIBLE >= 199309
 176 int clock_getres(clockid_t, struct timespec *);
 177 int clock_gettime(clockid_t, struct timespec *);
 178 int clock_settime(clockid_t, const struct timespec *);
 179 int nanosleep(const struct timespec *, struct timespec *);
 180 #endif /* __POSIX_VISIBLE >= 199309 */
 181
 182 #if __POSIX_VISIBLE >= 199506
 183 char *asctime_r(const struct tm *, char *);
 184 char *ctime_r(const time_t *, char *);
 185 struct tm *gmtime_r(const time_t *, struct tm *);
 186 struct tm *localtime_r(const time_t *, struct tm *);
 187 #endif
 188
 189 #if __POSIX_VISIBLE >= 200112
 190 int clock_getcpuclockid(pid_t, clockid_t *);
 191 #if 0 /* XXX missing */
 192 struct sigevent;
 193 int clock_nanosleep(clockid_t, int, const struct timespec *, struct timespec *);
 194 int timer_create(clockid_t, struct sigevent *__restrict, timer_t *__restrict);
 195 int timer_delete(timer_t);
 196 int timer_gettime(timer_t, struct itimerspec *);
 197 int timer_getoverrun(timer_t);
 198 int timer_settime(timer_t, int, const struct itimerspec *__restrict,
 199         struct itimerspec *__restrict);
 200 #endif
 201 #endif
 202
 203 #if __XSI_VISIBLE
 204 extern int daylight;
 205 extern long timezone;
 206 char *strptime(const char * __restrict, const char * __restrict,
 207     struct tm * __restrict);
 208 #endif
 209
 210 #if __BSD_VISIBLE
 211 int getcpuclockid(pid_t, lwpid_t, clockid_t *);
 212 void tzsetwall(void);
 213 time_t timelocal(struct tm * const);
 214 time_t timegm(struct tm * const);
 215 #endif /* __BSD_VISIBLE */
 216
 217 #if __POSIX_VISIBLE >= 200809 || defined(_XLOCALE_H_)
 218 #include <xlocale/_time.h>
 219 #endif
 220
 221 #if __ISO_C_VISIBLE >= 2011
 222 int timespec_get(struct timespec *ts, int base);
 223 #endif
 224 __END_DECLS
 225
 226 #endif /* !_TIME_H_ */