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- /* Copyright (C) 1991-2003,2006,2009 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
- /*
- * ISO C99 Standard: 7.23 Date and time <time.h>
- */
- #ifndef _TIME_H
- #if (! defined __need_time_t && !defined __need_clock_t && \
- ! defined __need_timespec)
- # define _TIME_H 1
- # include <features.h>
- __BEGIN_DECLS
- #endif
- #ifdef _TIME_H
- /* Get size_t and NULL from <stddef.h>. */
- # define __need_size_t
- # define __need_NULL
- # include <stddef.h>
- /* This defines CLOCKS_PER_SEC, which is the number of processor clock
- ticks per second. */
- # include <bits/time.h>
- /* This is the obsolete POSIX.1-1988 name for the same constant. */
- # if !defined __STRICT_ANSI__ && !defined __USE_XOPEN2K
- # ifndef CLK_TCK
- # define CLK_TCK CLOCKS_PER_SEC
- # endif
- # endif
- #endif /* <time.h> included. */
- #if !defined __clock_t_defined && (defined _TIME_H || defined __need_clock_t)
- # define __clock_t_defined 1
- # include <bits/types.h>
- __BEGIN_NAMESPACE_STD
- /* Returned by `clock'. */
- typedef __clock_t clock_t;
- __END_NAMESPACE_STD
- #if defined __USE_XOPEN || defined __USE_POSIX || defined __USE_MISC
- __USING_NAMESPACE_STD(clock_t)
- #endif
- #endif /* clock_t not defined and <time.h> or need clock_t. */
- #undef __need_clock_t
- #if !defined __time_t_defined && (defined _TIME_H || defined __need_time_t)
- # define __time_t_defined 1
- # include <bits/types.h>
- __BEGIN_NAMESPACE_STD
- /* Returned by `time'. */
- typedef __time_t time_t;
- __END_NAMESPACE_STD
- #if defined __USE_POSIX || defined __USE_MISC || defined __USE_SVID
- __USING_NAMESPACE_STD(time_t)
- #endif
- #endif /* time_t not defined and <time.h> or need time_t. */
- #undef __need_time_t
- #if !defined __clockid_t_defined && \
- ((defined _TIME_H && defined __USE_POSIX199309) || defined __need_clockid_t)
- # define __clockid_t_defined 1
- # include <bits/types.h>
- /* Clock ID used in clock and timer functions. */
- typedef __clockid_t clockid_t;
- #endif /* clockid_t not defined and <time.h> or need clockid_t. */
- #undef __clockid_time_t
- #if !defined __timer_t_defined && \
- ((defined _TIME_H && defined __USE_POSIX199309) || defined __need_timer_t)
- # define __timer_t_defined 1
- # include <bits/types.h>
- /* Timer ID returned by `timer_create'. */
- typedef __timer_t timer_t;
- #endif /* timer_t not defined and <time.h> or need timer_t. */
- #undef __need_timer_t
- #if !defined __timespec_defined && \
- ((defined _TIME_H && \
- (defined __USE_POSIX199309 || defined __USE_MISC)) || \
- defined __need_timespec)
- # define __timespec_defined 1
- # include <bits/types.h> /* This defines __time_t for us. */
- /* POSIX.1b structure for a time value. This is like a `struct timeval' but
- has nanoseconds instead of microseconds. */
- struct timespec
- {
- __time_t tv_sec; /* Seconds. */
- long int tv_nsec; /* Nanoseconds. */
- };
- #endif /* timespec not defined and <time.h> or need timespec. */
- #undef __need_timespec
- #ifdef _TIME_H
- __BEGIN_NAMESPACE_STD
- /* Used by other time functions. */
- struct tm
- {
- int tm_sec; /* Seconds. [0-60] (1 leap second) */
- int tm_min; /* Minutes. [0-59] */
- int tm_hour; /* Hours. [0-23] */
- int tm_mday; /* Day. [1-31] */
- int tm_mon; /* Month. [0-11] */
- int tm_year; /* Year - 1900. */
- int tm_wday; /* Day of week. [0-6] */
- int tm_yday; /* Days in year.[0-365] */
- int tm_isdst; /* DST. [-1/0/1]*/
- #ifdef __UCLIBC_HAS_TM_EXTENSIONS__
- #ifdef __USE_BSD
- long int tm_gmtoff; /* Seconds east of UTC. */
- const char *tm_zone; /* Timezone abbreviation. */
- #else
- long int __tm_gmtoff; /* Seconds east of UTC. */
- const char *__tm_zone; /* Timezone abbreviation. */
- #endif
- #endif /* __UCLIBC_HAS_TM_EXTENSIONS__ */
- };
- __END_NAMESPACE_STD
- #if defined __USE_XOPEN || defined __USE_POSIX || defined __USE_MISC
- __USING_NAMESPACE_STD(tm)
- #endif
- #ifdef __USE_POSIX199309
- /* POSIX.1b structure for timer start values and intervals. */
- struct itimerspec
- {
- struct timespec it_interval;
- struct timespec it_value;
- };
- /* We can use a simple forward declaration. */
- struct sigevent;
- #endif /* POSIX.1b */
- #ifdef __USE_XOPEN2K
- # ifndef __pid_t_defined
- typedef __pid_t pid_t;
- # define __pid_t_defined
- # endif
- #endif
- __BEGIN_NAMESPACE_STD
- /* Time used by the program so far (user time + system time).
- The result / CLOCKS_PER_SECOND is program time in seconds. */
- extern clock_t clock (void) __THROW;
- /* Return the current time and put it in *TIMER if TIMER is not NULL. */
- extern time_t time (time_t *__timer) __THROW;
- libc_hidden_proto(time)
- #ifdef __UCLIBC_HAS_FLOATS__
- /* Return the difference between TIME1 and TIME0. */
- extern double difftime (time_t __time1, time_t __time0)
- __THROW __attribute__ ((__const__));
- #endif /* __UCLIBC_HAS_FLOATS__ */
- #ifdef _LIBC
- # define CLOCK_IDFIELD_SIZE 3
- #endif
- /* Return the `time_t' representation of TP and normalize TP. */
- extern time_t mktime (struct tm *__tp) __THROW;
- /* Format TP into S according to FORMAT.
- Write no more than MAXSIZE characters and return the number
- of characters written, or 0 if it would exceed MAXSIZE. */
- extern size_t strftime (char *__restrict __s, size_t __maxsize,
- const char *__restrict __format,
- const struct tm *__restrict __tp) __THROW;
- __END_NAMESPACE_STD
- # ifdef __USE_XOPEN
- /* Parse S according to FORMAT and store binary time information in TP.
- The return value is a pointer to the first unparsed character in S. */
- extern char *strptime (const char *__restrict __s,
- const char *__restrict __fmt, struct tm *__tp)
- __THROW;
- # endif
- #ifdef __UCLIBC_HAS_XLOCALE__
- # ifdef __USE_XOPEN2K8
- /* Similar to the two functions above but take the information from
- the provided locale and not the global locale. */
- # include <xlocale.h>
- extern size_t strftime_l (char *__restrict __s, size_t __maxsize,
- const char *__restrict __format,
- const struct tm *__restrict __tp,
- __locale_t __loc) __THROW;
- libc_hidden_proto(strftime_l)
- # endif
- # ifdef __USE_GNU
- extern char *strptime_l (const char *__restrict __s,
- const char *__restrict __fmt, struct tm *__tp,
- __locale_t __loc) __THROW;
- libc_hidden_proto(strptime_l)
- # endif
- #endif
- __BEGIN_NAMESPACE_STD
- /* Return the `struct tm' representation of *TIMER
- in Universal Coordinated Time (aka Greenwich Mean Time). */
- extern struct tm *gmtime (const time_t *__timer) __THROW;
- /* Return the `struct tm' representation
- of *TIMER in the local timezone. */
- extern struct tm *localtime (const time_t *__timer) __THROW;
- libc_hidden_proto(localtime)
- __END_NAMESPACE_STD
- # if defined __USE_POSIX || defined __USE_MISC
- /* Return the `struct tm' representation of *TIMER in UTC,
- using *TP to store the result. */
- extern struct tm *gmtime_r (const time_t *__restrict __timer,
- struct tm *__restrict __tp) __THROW;
- /* Return the `struct tm' representation of *TIMER in local time,
- using *TP to store the result. */
- extern struct tm *localtime_r (const time_t *__restrict __timer,
- struct tm *__restrict __tp) __THROW;
- libc_hidden_proto(localtime_r)
- # endif /* POSIX or misc */
- __BEGIN_NAMESPACE_STD
- /* Return a string of the form "Day Mon dd hh:mm:ss yyyy\n"
- that is the representation of TP in this format. */
- extern char *asctime (const struct tm *__tp) __THROW;
- libc_hidden_proto(asctime)
- /* Equivalent to `asctime (localtime (timer))'. */
- extern char *ctime (const time_t *__timer) __THROW;
- libc_hidden_proto(ctime)
- __END_NAMESPACE_STD
- # if defined __USE_POSIX || defined __USE_MISC
- /* Reentrant versions of the above functions. */
- /* Return in BUF a string of the form "Day Mon dd hh:mm:ss yyyy\n"
- that is the representation of TP in this format. */
- extern char *asctime_r (const struct tm *__restrict __tp,
- char *__restrict __buf) __THROW;
- libc_hidden_proto(asctime_r)
- /* Equivalent to `asctime_r (localtime_r (timer, *TMP*), buf)'. */
- extern char *ctime_r (const time_t *__restrict __timer,
- char *__restrict __buf) __THROW;
- # endif /* POSIX or misc */
- # ifdef __USE_POSIX
- /* Same as above. */
- extern char *tzname[2];
- /* Set time conversion information from the TZ environment variable.
- If TZ is not defined, a locale-dependent default is used. */
- extern void tzset (void) __THROW;
- libc_hidden_proto(tzset)
- # endif
- # if defined __USE_SVID || defined __USE_XOPEN
- extern int daylight;
- extern long int timezone;
- # endif
- # ifdef __USE_SVID
- /* Set the system time to *WHEN.
- This call is restricted to the superuser. */
- extern int stime (const time_t *__when) __THROW;
- libc_hidden_proto(stime)
- # endif
- /* Nonzero if YEAR is a leap year (every 4 years,
- except every 100th isn't, and every 400th is). */
- # define __isleap(year) \
- ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
- # ifdef __USE_MISC
- /* Miscellaneous functions many Unices inherited from the public domain
- localtime package. These are included only for compatibility. */
- /* Like `mktime', but for TP represents Universal Time, not local time. */
- extern time_t timegm (struct tm *__tp) __THROW;
- /* Another name for `mktime'. */
- extern time_t timelocal (struct tm *__tp) __THROW;
- /* Return the number of days in YEAR. */
- extern int dysize (int __year) __THROW __attribute__ ((__const__));
- # endif
- # ifdef __USE_POSIX199309
- # if defined __UCLIBC_HAS_REALTIME__
- /* Pause execution for a number of nanoseconds.
- This function is a cancellation point and therefore not marked with
- __THROW. */
- extern int nanosleep (const struct timespec *__requested_time,
- struct timespec *__remaining);
- libc_hidden_proto(nanosleep)
- /* Get resolution of clock CLOCK_ID. */
- extern int clock_getres (clockid_t __clock_id, struct timespec *__res) __THROW;
- libc_hidden_proto(clock_getres)
- /* Get current value of clock CLOCK_ID and store it in TP. */
- extern int clock_gettime (clockid_t __clock_id, struct timespec *__tp) __THROW;
- /* Set clock CLOCK_ID to value TP. */
- extern int clock_settime (clockid_t __clock_id, const struct timespec *__tp)
- __THROW;
- # endif /* __UCLIBC_HAS_REALTIME__ */
- # if defined __USE_XOPEN2K && defined __UCLIBC_HAS_ADVANCED_REALTIME__
- /* High-resolution sleep with the specified clock.
- This function is a cancellation point and therefore not marked with
- __THROW. */
- extern int clock_nanosleep (clockid_t __clock_id, int __flags,
- const struct timespec *__req,
- struct timespec *__rem);
- /* Return clock ID for CPU-time clock. */
- extern int clock_getcpuclockid (pid_t __pid, clockid_t *__clock_id) __THROW;
- # endif
- # if defined __UCLIBC_HAS_REALTIME__
- /* Create new per-process timer using CLOCK_ID. */
- extern int timer_create (clockid_t __clock_id,
- struct sigevent *__restrict __evp,
- timer_t *__restrict __timerid) __THROW;
- /* Delete timer TIMERID. */
- extern int timer_delete (timer_t __timerid) __THROW;
- /* Set timer TIMERID to VALUE, returning old value in OVLAUE. */
- extern int timer_settime (timer_t __timerid, int __flags,
- const struct itimerspec *__restrict __value,
- struct itimerspec *__restrict __ovalue) __THROW;
- /* Get current value of timer TIMERID and store it in VLAUE. */
- extern int timer_gettime (timer_t __timerid, struct itimerspec *__value)
- __THROW;
- /* Get expiration overrun for timer TIMERID. */
- extern int timer_getoverrun (timer_t __timerid) __THROW;
- # endif /* __UCLIBC_HAS_REALTIME__ */
- # endif /* __USE_POSIX199309 */
- __END_DECLS
- #endif /* <time.h> included. */
- #endif /* <time.h> not already included. */
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