include/time.h

   1 /*      $NetBSD: time.h,v 1.36 2008/04/01 19:23:28 drochner Exp $       */
   2
   3 /*
   4  * Copyright (c) 1989, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  * (c) UNIX System Laboratories, Inc.
   7  * All or some portions of this file are derived from material licensed
   8  * to the University of California by American Telephone and Telegraph
   9  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  10  * the permission of UNIX System Laboratories, Inc.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)time.h      8.3 (Berkeley) 1/21/94
  37  */
  38
  39 #ifndef _TIME_H_
  40 #define _TIME_H_
  41
  42 #include <sys/cdefs.h>
  43 #include <sys/featuretest.h>
  44 #include <machine/ansi.h>
  45
  46 #include <sys/null.h>
  47
  48 #ifdef  _BSD_CLOCK_T_
  49 typedef _BSD_CLOCK_T_   clock_t;
  50 #undef  _BSD_CLOCK_T_
  51 #endif
  52
  53 #ifdef  _BSD_TIME_T_
  54 typedef _BSD_TIME_T_    time_t;
  55 #undef  _BSD_TIME_T_
  56 #endif
  57
  58 #ifdef  _BSD_SIZE_T_
  59 typedef _BSD_SIZE_T_    size_t;
  60 #undef  _BSD_SIZE_T_
  61 #endif
  62
  63 #ifdef  _BSD_CLOCKID_T_
  64 typedef _BSD_CLOCKID_T_ clockid_t;
  65 #undef  _BSD_CLOCKID_T_
  66 #endif
  67
  68 #ifdef  _BSD_TIMER_T_
  69 typedef _BSD_TIMER_T_   timer_t;
  70 #undef  _BSD_TIMER_T_
  71 #endif
  72
  73 #define CLOCKS_PER_SEC  100
  74
  75 struct tm {
  76         int     tm_sec;         /* seconds after the minute [0-61] */
  77         int     tm_min;         /* minutes after the hour [0-59] */
  78         int     tm_hour;        /* hours since midnight [0-23] */
  79         int     tm_mday;        /* day of the month [1-31] */
  80         int     tm_mon;         /* months since January [0-11] */
  81         int     tm_year;        /* years since 1900 */
  82         int     tm_wday;        /* days since Sunday [0-6] */
  83         int     tm_yday;        /* days since January 1 [0-365] */
  84         int     tm_isdst;       /* Daylight Savings Time flag */
  85         long    tm_gmtoff;      /* offset from UTC in seconds */
  86         __aconst char *tm_zone; /* timezone abbreviation */
  87 };
  88
  89 __BEGIN_DECLS
  90 char *asctime(const struct tm *);
  91 clock_t clock(void);
  92 char *ctime(const time_t *);
  93 double difftime(time_t, time_t);
  94 struct tm *gmtime(const time_t *);
  95 struct tm *localtime(const time_t *);
  96 time_t mktime(struct tm *);
  97 size_t strftime(char * __restrict, size_t, const char * __restrict,
  98     const struct tm * __restrict)
  99     __attribute__((__format__(__strftime__, 3, 0)));
 100 time_t time(time_t *);
 101
 102 #if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
 103     defined(_NETBSD_SOURCE)
 104 #ifndef __LIBC12_SOURCE__
 105 /*
 106  * CLK_TCK uses libc's internal __sysconf() to retrieve the machine's
 107  * HZ. The value of _SC_CLK_TCK is 39 -- we hard code it so we do not
 108  * need to include unistd.h
 109  */
 110 long __sysconf(int);
 111 #define CLK_TCK         (__sysconf(39))
 112 #endif
 113 #endif
 114
 115 extern __aconst char *tzname[2];
 116 void tzset(void);
 117
 118 /*
 119  * X/Open Portability Guide >= Issue 4
 120  */
 121 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
 122 extern int daylight;
 123 #ifndef __LIBC12_SOURCE__
 124 extern long int timezone __RENAME(__timezone13);
 125 #endif
 126 char *strptime(const char * __restrict, const char * __restrict,
 127     struct tm * __restrict);
 128 #endif
 129
 130 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
 131     defined(_NETBSD_SOURCE)
 132 #include <sys/time.h>           /* XXX for struct timespec */
 133 struct sigevent;
 134 struct itimerspec;
 135 int clock_getres(clockid_t, struct timespec *);
 136 int clock_gettime(clockid_t, struct timespec *);
 137 int clock_settime(clockid_t, const struct timespec *);
 138 int nanosleep(const struct timespec *, struct timespec *);
 139 int timer_create(clockid_t, struct sigevent * __restrict,
 140     timer_t * __restrict);
 141 int timer_delete(timer_t);
 142 int timer_getoverrun(timer_t);
 143 int timer_gettime(timer_t, struct itimerspec *);
 144 int timer_settime(timer_t, int, const struct itimerspec * __restrict,
 145     struct itimerspec * __restrict);
 146 #endif /* _POSIX_C_SOURCE >= 199309 || _XOPEN_SOURCE >= 500 || ... */
 147
 148 #if (_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500 || \
 149     defined(_REENTRANT) || defined(_NETBSD_SOURCE)
 150 char *asctime_r(const struct tm * __restrict, char * __restrict);
 151 char *ctime_r(const time_t *, char *);
 152 struct tm *gmtime_r(const time_t * __restrict, struct tm * __restrict);
 153 struct tm *localtime_r(const time_t * __restrict, struct tm * __restrict);
 154 #endif
 155
 156 #if defined(_NETBSD_SOURCE)
 157 time_t time2posix(time_t);
 158 time_t posix2time(time_t);
 159 time_t timegm(struct tm *);
 160 time_t timeoff(struct tm *, long);
 161 time_t timelocal(struct tm *);
 162 void tzsetwall(void);
 163 struct tm *offtime(const time_t *, long);
 164 #endif /* _NETBSD_SOURCE */
 165
 166 __END_DECLS
 167
 168 #endif /* !_TIME_H_ */