diff options
Diffstat (limited to 'include/time.h')
| -rw-r--r-- | include/time.h | 418 |
1 files changed, 331 insertions, 87 deletions
diff --git a/include/time.h b/include/time.h index 4d9781d5d..08ee502e5 100644 --- a/include/time.h +++ b/include/time.h @@ -1,122 +1,366 @@ -/* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc. -This file is part of the GNU C Library. +/* Copyright (C) 1991-1999, 2000, 2001 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 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 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 -Library General Public License for more details. + 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 Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ /* - * ANSI Standard: 4.12 DATE and TIME <time.h> + * ISO C99 Standard: 7.23 Date and time <time.h> */ -#ifndef _TIME_H -#define _TIME_H +#ifndef _TIME_H -#include <features.h> -#include <sys/time.h> +#if (! defined __need_time_t && !defined __need_clock_t && \ + ! defined __need_timespec) +# define _TIME_H 1 +# include <features.h> -#ifndef _TIME_T -#define _TIME_T -typedef long time_t; -#endif +__BEGIN_DECLS -#ifndef _CLOCK_T -#define _CLOCK_T -typedef long clock_t; #endif -#ifndef _SIZE_T -#define _SIZE_T -typedef unsigned int size_t; -#endif +#ifdef _TIME_H +/* Get size_t and NULL from <stddef.h>. */ +# define __need_size_t +# define __need_NULL +# include <stddef.h> -#ifndef NULL -#ifdef __cplusplus -#define NULL 0 -#else -#define NULL ((void *) 0) -#endif -#endif +/* 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> + +/* Returned by `clock'. */ +typedef __clock_t 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 <bits/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 + +#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> -#define CLOCKS_PER_SEC 100 -#define CLK_TCK 100 /* That must be the same as HZ ???? */ - -struct tm { - int tm_sec; - int tm_min; - int tm_hour; - int tm_mday; - int tm_mon; - int tm_year; - int tm_wday; - int tm_yday; - int tm_isdst; - /* Those are for future use. */ - long int __tm_gmtoff__; - __const char *__tm_zone__; +/* 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 __need_timespec) +# define __timespec_defined 1 + +/* POSIX.1b structure for a time value. This is like a `struct timeval' but + has nanoseconds instead of microseconds. */ +struct timespec + { + long int tv_sec; /* Seconds. */ + long int tv_nsec; /* Nanoseconds. */ + }; + +#endif /* timespec not defined and <time.h> or need timespec. */ +#undef __need_timespec + + +#ifdef _TIME_H +/* 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 __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 }; -#define __isleap(year) \ - ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) +#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 + + +/* 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; + +/* Return the difference between TIME1 and TIME0. */ +extern double difftime (time_t __time1, time_t __time0) + __THROW __attribute__ ((__const__)); + +/* 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; + +# 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 + + +/* 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; + +# 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; +# endif /* POSIX or misc */ + +/* 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; + +/* Equivalent to `asctime (localtime (timer))'. */ +extern char *ctime (__const time_t *__timer) __THROW; + +# 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; + +/* 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 */ + + +/* Defined in localtime.c. */ +extern char *__tzname[2]; /* Current timezone names. */ +extern int __daylight; /* If daylight-saving time is ever in use. */ +extern long int __timezone; /* Seconds west of UTC. */ + + +# ifdef __USE_POSIX +/* Same as above. */ extern char *tzname[2]; -extern int daylight; -extern long int timezone; -__BEGIN_DECLS +/* 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; +# endif -extern int stime __P ((time_t* __tptr)); +# if defined __USE_SVID || defined __USE_XOPEN +extern int daylight; +extern long int timezone; +# endif -extern clock_t clock __P ((void)); -extern time_t time __P ((time_t * __tp)); -extern __CONSTVALUE double difftime __P ((time_t __time2, - time_t __time1)) __CONSTVALUE2; -extern time_t mktime __P ((struct tm * __tp)); +# ifdef __USE_SVID +/* Set the system time to *WHEN. + This call is restricted to the superuser. */ +extern int stime (__const time_t *__when) __THROW; +# endif -extern char * asctime __P ((__const struct tm * __tp)); -extern char * ctime __P ((__const time_t * __tp)); -extern size_t strftime __P ((char * __s, size_t __smax, - __const char * __fmt, __const struct tm * __tp)); -extern char * strptime __P ((__const char * __s, __const char * __fmt, - struct tm * __tm)); -extern void tzset __P ((void)); +/* 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)) -extern struct tm* gmtime __P ((__const time_t *__tp)); -extern struct tm* localtime __P ((__const time_t * __tp)); -#ifdef __USE_MISC +# ifdef __USE_MISC /* Miscellaneous functions many Unices inherited from the public domain - localtime package. These are included only for compatibility. */ + 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)); - +extern time_t timegm (struct tm *__tp) __THROW; + /* Another name for `mktime'. */ -extern time_t timelocal __P ((struct tm *__tp)); +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 +/* Pause execution for a number of nanoseconds. */ +extern int nanosleep (__const struct timespec *__requested_time, + struct timespec *__remaining) __THROW; + + +/* Get resolution of clock CLOCK_ID. */ +extern int clock_getres (clockid_t __clock_id, struct timespec *__res) __THROW; + +/* 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; + +# ifdef __USE_XOPEN2K +/* High-resolution sleep with the specified clock. */ +extern int clock_nanosleep (clockid_t __clock_id, int __flags, + __const struct timespec *__req, + struct timespec *__rem) __THROW; + +/* Return clock ID for CPU-time clock. */ +extern int clock_getcpuclockid (pid_t __pid, clockid_t *__clock_id) __THROW; +# endif -#endif -extern char * asctime_r __P((__const struct tm *, char *)); -extern char * ctime_r __P((__const time_t *, char *)); -extern struct tm* gmtime_r __P((__const time_t *, struct tm *)); -extern struct tm* localtime_r __P((__const time_t *, struct tm *)); +/* 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 + + +# ifdef __USE_XOPEN_EXTENDED +/* Set to one of the following values to indicate an error. + 1 the DATEMSK environment variable is null or undefined, + 2 the template file cannot be opened for reading, + 3 failed to get file status information, + 4 the template file is not a regular file, + 5 an error is encountered while reading the template file, + 6 memory allication failed (not enough memory available), + 7 there is no line in the template that matches the input, + 8 invalid input specification Example: February 31 or a time is + specified that can not be represented in a time_t (representing + the time in seconds since 00:00:00 UTC, January 1, 1970) */ +extern int getdate_err; + +/* Parse the given string as a date specification and return a value + representing the value. The templates from the file identified by + the environment variable DATEMSK are used. In case of an error + `getdate_err' is set. */ +extern struct tm *getdate (__const char *__string) __THROW; +# endif + +# ifdef __USE_GNU +/* Since `getdate' is not reentrant because of the use of `getdate_err' + and the static buffer to return the result in, we provide a thread-safe + variant. The functionality is the same. The result is returned in + the buffer pointed to by RESBUFP and in case of an error the return + value is != 0 with the same values as given above for `getdate_err'. */ +extern int getdate_r (__const char *__restrict __string, + struct tm *__restrict __resbufp) __THROW; +# endif -/* IEEE Std 1003.1b-1993. */ -extern int nanosleep __P((__const struct timespec *__rqtp, - struct timespec *__rmtp)); __END_DECLS -#endif +#endif /* <time.h> included. */ + +#endif /* <time.h> not already included. */ |