glibc/time/time.h

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/* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
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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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
/*
* ANSI Standard: 4.12 DATE and TIME <time.h>
*/
#ifndef _TIME_H
#if !defined(__need_time_t) && !defined(__need_clock_t)
#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>
#endif /* <time.h> included. */
#ifdef _TIME_H
/* This defines CLOCKS_PER_SEC, which is the number of processor clock
ticks per second. */
#include <timebits.h>
/* This is the obsolete POSIX.1-1988 name for the same constant. */
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#ifdef __USE_POSIX
#define CLK_TCK CLOCKS_PER_SEC
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#endif
#endif /* <time.h> included. */
#if !defined(__clock_t_defined) && \
(defined(_TIME_H) || defined(__need_clock_t))
#define __clock_t_defined 1
/* Returned by `clock'. */
typedef long int clock_t;
#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 <gnu/types.h>
/* Returned by `time'. */
typedef __time_t time_t;
#endif /* time_t not defined and <time.h> or need time_t. */
#undef __need_time_t
#ifdef _TIME_H
/* Used by other time functions. */
struct tm
{
int tm_sec; /* Seconds. [0-61] (2 leap seconds) */
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]*/
long int tm_gmtoff; /* Seconds west of UTC. */
__const char *tm_zone; /* Timezone abbreviation. */
};
#endif /* <time.h> included. */
#ifdef _TIME_H
/* 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 __P ((void));
/* Return the current time and put it in *TIMER if TIMER is not NULL. */
extern time_t time __P ((time_t *__timer));
/* Return the difference between TIME1 and TIME0. */
extern double difftime __P ((time_t __time1, time_t __time0))
__attribute__ ((__const__));
/* Return the `time_t' representation of TP and normalize TP. */
extern time_t mktime __P ((struct tm *__tp));
/* Subroutine of `mktime'. Return the `time_t' representation of TP and
normalize TP, given that a `struct tm *' maps to a `time_t' as performed
by FUNC. Keep track of next guess for time_t offset in *OFFSET. */
Mon Sep 18 12:39:22 1995 Paul Eggert <eggert@twinsun.com> * mktime.c (localtime_r): Add substitute if the system doesn't provide one. Mon Sep 18 14:39:20 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * time/gmtime.c (gmtime_r): Define as weak alias. * time/localtime.c (localtime_r): Define as weak alias. * time/time.h [__USE_REENTRANT] (gmtime_r, localtime_r): Declare them. * errno.h: Only define _ERRNO_H #ifndef __need_Emath. #undef __need_Emath after including errnos.h. [_ERRNO_H]: Protect decls with this. Sun Sep 17 08:22:12 1995 Paul Eggert <eggert@twinsun.com> Fix mktime so that it does not write over localtime's returned value. * localtime.c (__localtime_r): New function, with extra arg specifying where to store result. (localtime): Use it. (_tmbuf): New var. * gmtime.c (__gmtime_r, gmtime, _tmbuf): Likewise. * mktime.c (__mktime_internal): Conversion function is now __localtime_r style, not localtime style. (mktime): Pass __localtime_r, not localtime. * timegm.c (timegm): Pass __gmtime_r, not gmtime. * offtime.c (__offtime): New arg specifying where to store result. * time.h (__mktime_internal, __offtime): Adjust decls accordingly. (__gmtime_r, __localtime_r): New decls. * time/localtime.c: <stddef.h>, <ctype.h>, <stdio.h>, <stdlib.h>, <string.h>: Remove includes. <errno.h>: Add include. * time/mktime.c, time/time.h, time/timegm.c (__mktime_internal): Renamed from _mktime_internal to avoid namespace pollution. * time/gmtime.c: Clear tm_isdst. * misc/efgcvt_r.c (ecvt_r, fcvt_r): Last arg is size_t, not int. * stdlib/stdlib.h (ecvt_r, fcvt_r): Fix type of last arg: make it size_t. * sysdeps/mach/hurd/fpathconf.c: Call __io_pathconf instead of __file_pathconf. * sysdeps/mach/hurd/pathconf.c: Likewise.
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extern time_t __mktime_internal __P ((struct tm *__tp,
struct tm *(*__func) (const time_t *,
struct tm *),
time_t *__offset));
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/* 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 __P ((char *__s, size_t __maxsize,
__const char *__format, __const struct tm *__tp));
#ifdef __USE_MISC
/* 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 __P ((__const char *__s, __const char *__fmt,
struct tm *__tp));
#endif
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/* Return the `struct tm' representation of *TIMER
in Universal Coordinated Time (aka Greenwich Mean Time). */
extern struct tm *gmtime __P ((__const time_t *__timer));
/* Return the `struct tm' representation
of *TIMER in the local timezone. */
extern struct tm *localtime __P ((__const time_t *__timer));
Mon Sep 18 12:39:22 1995 Paul Eggert <eggert@twinsun.com> * mktime.c (localtime_r): Add substitute if the system doesn't provide one. Mon Sep 18 14:39:20 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * time/gmtime.c (gmtime_r): Define as weak alias. * time/localtime.c (localtime_r): Define as weak alias. * time/time.h [__USE_REENTRANT] (gmtime_r, localtime_r): Declare them. * errno.h: Only define _ERRNO_H #ifndef __need_Emath. #undef __need_Emath after including errnos.h. [_ERRNO_H]: Protect decls with this. Sun Sep 17 08:22:12 1995 Paul Eggert <eggert@twinsun.com> Fix mktime so that it does not write over localtime's returned value. * localtime.c (__localtime_r): New function, with extra arg specifying where to store result. (localtime): Use it. (_tmbuf): New var. * gmtime.c (__gmtime_r, gmtime, _tmbuf): Likewise. * mktime.c (__mktime_internal): Conversion function is now __localtime_r style, not localtime style. (mktime): Pass __localtime_r, not localtime. * timegm.c (timegm): Pass __gmtime_r, not gmtime. * offtime.c (__offtime): New arg specifying where to store result. * time.h (__mktime_internal, __offtime): Adjust decls accordingly. (__gmtime_r, __localtime_r): New decls. * time/localtime.c: <stddef.h>, <ctype.h>, <stdio.h>, <stdlib.h>, <string.h>: Remove includes. <errno.h>: Add include. * time/mktime.c, time/time.h, time/timegm.c (__mktime_internal): Renamed from _mktime_internal to avoid namespace pollution. * time/gmtime.c: Clear tm_isdst. * misc/efgcvt_r.c (ecvt_r, fcvt_r): Last arg is size_t, not int. * stdlib/stdlib.h (ecvt_r, fcvt_r): Fix type of last arg: make it size_t. * sysdeps/mach/hurd/fpathconf.c: Call __io_pathconf instead of __file_pathconf. * sysdeps/mach/hurd/pathconf.c: Likewise.
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#ifdef __USE_REENTRANT
/* Return the `struct tm' representation of *TIMER in UTC,
using *TP to store the result. */
extern struct tm *__gmtime_r __P ((__const time_t *__timer,
struct tm *__tp));
extern struct tm *gmtime_r __P ((__const time_t *__timer,
struct tm *__tp));
/* Return the `struct tm' representation of *TIMER in local time,
using *TP to store the result. */
extern struct tm *__localtime_r __P ((__const time_t *__timer,
struct tm *__tp));
extern struct tm *localtime_r __P ((__const time_t *__timer,
struct tm *__tp));
#endif
/* Compute the `struct tm' representation of *T,
offset OFFSET seconds east of UTC,
and store year, yday, mon, mday, wday, hour, min, sec into *TP. */
extern void __offtime __P ((__const time_t *__timer,
long int __offset,
struct tm *__TP));
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/* 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 __P ((__const struct tm *__tp));
/* Equivalent to `asctime(localtime(timer))'. */
extern char *ctime __P ((__const time_t *__timer));
/* Defined in localtime.c. */
extern char *__tzname[2]; /* Current timezone names. */
extern int __daylight; /* If it is daylight savings time. */
extern long int __timezone; /* Seconds west of UTC. */
/* Set time conversion information from the TZ environment variable.
If TZ is not defined, a locale-dependent default is used. */
extern void __tzset __P ((void));
#ifdef __USE_POSIX
/* Same as above. */
extern char *tzname[2];
/* Return the maximum length of a timezone name.
This is what `sysconf (_SC_TZNAME_MAX)' does. */
extern long int __tzname_max __P ((void));
extern void tzset __P ((void));
#ifdef __OPTIMIZE__
#define tzset() __tzset()
#endif /* Optimizing. */
#endif
#ifdef __USE_SVID
extern int daylight;
extern long int timezone;
/* Set the system time to *WHEN.
This call is restricted to the superuser. */
extern int stime __P ((__const time_t *__when));
#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 __P ((struct tm *__tp));
/* Another name for `mktime'. */
extern time_t timelocal __P ((struct tm *__tp));
/* Return the number of days in YEAR. */
extern int dysize __P ((int __year));
#endif
Sun Apr 28 14:14:35 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> * sysdeps/unix/sysv/linux/i386/Makefile: New file. Wed Apr 24 17:35:30 Ulrich Drepper <drepper@cygnus.com> * inet/netinet/in.h, socket/sys/socket.h: Move to sysdeps/generic/netinet/in.h, sysdeps/generic/sys/socket.h. * netinet/in.h, sys/socket.h: Remove file. * misc/Makefile (routines): Add fdatasync. * posix/Makefile (headers): Add sched.h. (routines): Add nanosleep, sched_setp, sched_getp, sched_sets, sched_gets, sched_yield, sched_primax, sched_primin, sched_rr_gi. * posix/getconf.c (vars): Add entries for _POSIX_REALTIME_SIGNALS, _POSIX_PRIORITY_SCHEDULING, _POSIX_TIMERS, _POSIX_ASYNCHRONOUS_IO, _POSIX_PRIORITIZED_IO, _POSIX_SYNCHRONIZED_IO, _POSIX_FSYNC, _POSIX_MAPPED_FILES, _POSIX_MEMLOCK, _POSIX_MEMLOCK_RANGE, _POSIX_MEMORY_PROTECTION, _POSIX_MESSAGE_PASSING, _POSIX_SEMAPHORES, _POSIX_SHARED_MEMORY_OBJECTS. * posix/sched.h: New file. Header for POSIX scheduling interface. * posix/unistd.h: Describe options from POSIX.4. Add declaration of fdatasync. * sysdeps/generic/confname.h: Add definition for _SC_REALTIME_SIGNALS, _SC_PRIORITY_SCHEDULING, _SC_TIMERS, _SC_ASYNCHRONOUS_IO, _SC_PRIORITIZED_IO, _SC_SYNCHRONIZED_IO, _SC_FSYNC, _SC_MAPPED_FILES, _SC_MEMLOCK, _SC_MEMLOCK_RANGE, _SC_MEMORY_PROTECTION, _SC_MESSAGE_PASSING, _SC_SEMAPHORES, _SC_SHARED_MEMORY_OBJECTS. * sysdeps/generic/fdatasync.c: New file. Default implementation simply uses fsync. * sysdeps/generic/netinit/in.h: Moved to here from inet/netinet/in.h. * sysdeps/generic/schedbits.h: New file. System dependent defintion for POSIX.4 scheduling interface. * sysdeps/generic/sys/socket.h: Moved to here from socket/sys/socket.h. * sysdeps/stub/nanosleep.c, sysdeps/stub/sched_getp.c, sysdeps/stub/sched_gets.c, sysdeps/stub/sched_primax.c, sysdeps/stub/sched_primin.c, sysdeps/stub/sched_rr_gi.c, sysdeps/stub/sched_setp.c, sysdeps/stub/sched_sets.c, sysdeps/stub/sched_yield.c: New file: Stub implementation for systems missing these POSIX.4 system calls. * sysdeps/unix/sysv/linux/gnu/types.h, sysdeps/unix/sysv/linux/ioctls.h: Use kernel header for data type definitions. * sysdeps/unix/sysv/linux/netinet/in.h: New file. Linux specific version. * sysdeps/unix/sysv/linux/posix_opt.h: New file. Define POSIX options applicable for Linux. * sysdeps/unix/sysv/linux/syscalls.list: Add definitions for fdatasync, nanosleep, sched_setparam, sched_getparam, sched_setscheduler, sched_getscheduler, sched_yield, sched_get_priority_max, sched_get_priority_min, and sched_rr_get_interval. * sysdeps/unix/sysv/linux/sysconf.c: Add handling of POSIX.4 options. * sysdeps/unix/sysv/linux/termbits.h: Use kernel headers. * time/sys/time.h: Remove definition of `struct timespec'. * time/time.h (struct timespec): Move definition to here. variable, LUCKY, to use instead of setting D to -1 (which fouls
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/* POSIX.4 structure for a time value. This is like a `struct timeval' but
has nanoseconds instead of microseconds. */
struct timespec
{
long int ts_sec; /* Seconds. */
long int ts_nsec; /* Nanoseconds. */
};
#ifdef __USE_POSIX
/* Pause execution for a number of nanoseconds. */
extern int nanosleep __P ((__const struct timespec *__requested_time,
struct timespec *__remaining));
#endif
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__END_DECLS
#endif /* <time.h> included. */
#endif /* <time.h> not already included. */