source: proiecte/SolarSim/C/Serial/src/time.h @ 152

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1/* Copyright (C) 1991-1999,2000,2001,2002,2003,2006
2        Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4
5   The GNU C Library is free software; you can redistribute it and/or
6   modify it under the terms of the GNU Lesser General Public
7   License as published by the Free Software Foundation; either
8   version 2.1 of the License, or (at your option) any later version.
9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, write to the Free
17   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18   02111-1307 USA.  */
19
20/*
21 *      ISO C99 Standard: 7.23 Date and time    <time.h>
22 */
23
24#ifndef _TIME_H
25
26#if (! defined __need_time_t && !defined __need_clock_t && \
27     ! defined __need_timespec)
28# define _TIME_H        1
29# include <features.h>
30
31__BEGIN_DECLS
32
33#endif
34
35#ifdef  _TIME_H
36/* Get size_t and NULL from <stddef.h>.  */
37# define __need_size_t
38# define __need_NULL
39# include <stddef.h>
40
41/* This defines CLOCKS_PER_SEC, which is the number of processor clock
42   ticks per second.  */
43# include <bits/time.h>
44
45/* This is the obsolete POSIX.1-1988 name for the same constant.  */
46# if !defined __STRICT_ANSI__ && !defined __USE_XOPEN2K
47#  ifndef CLK_TCK
48#   define CLK_TCK      CLOCKS_PER_SEC
49#  endif
50# endif
51
52#endif /* <time.h> included.  */
53
54#if !defined __clock_t_defined && (defined _TIME_H || defined __need_clock_t)
55# define __clock_t_defined      1
56
57# include <bits/types.h>
58
59__BEGIN_NAMESPACE_STD
60/* Returned by `clock'.  */
61typedef __clock_t clock_t;
62__END_NAMESPACE_STD
63#if defined __USE_XOPEN || defined __USE_POSIX || defined __USE_MISC
64__USING_NAMESPACE_STD(clock_t)
65#endif
66
67#endif /* clock_t not defined and <time.h> or need clock_t.  */
68#undef  __need_clock_t
69
70#if !defined __time_t_defined && (defined _TIME_H || defined __need_time_t)
71# define __time_t_defined       1
72
73# include <bits/types.h>
74
75__BEGIN_NAMESPACE_STD
76/* Returned by `time'.  */
77typedef __time_t time_t;
78__END_NAMESPACE_STD
79#if defined __USE_POSIX || defined __USE_MISC || defined __USE_SVID
80__USING_NAMESPACE_STD(time_t)
81#endif
82
83#endif /* time_t not defined and <time.h> or need time_t.  */
84#undef  __need_time_t
85
86#if !defined __clockid_t_defined && \
87   ((defined _TIME_H && defined __USE_POSIX199309) || defined __need_clockid_t)
88# define __clockid_t_defined    1
89
90# include <bits/types.h>
91
92/* Clock ID used in clock and timer functions.  */
93typedef __clockid_t clockid_t;
94
95#endif /* clockid_t not defined and <time.h> or need clockid_t.  */
96#undef  __clockid_time_t
97
98#if !defined __timer_t_defined && \
99    ((defined _TIME_H && defined __USE_POSIX199309) || defined __need_timer_t)
100# define __timer_t_defined      1
101
102# include <bits/types.h>
103
104/* Timer ID returned by `timer_create'.  */
105typedef __timer_t timer_t;
106
107#endif /* timer_t not defined and <time.h> or need timer_t.  */
108#undef  __need_timer_t
109
110
111#if !defined __timespec_defined &&                              \
112    ((defined _TIME_H &&                                        \
113      (defined __USE_POSIX199309 || defined __USE_MISC)) ||     \
114      defined __need_timespec)
115# define __timespec_defined     1
116
117# include <bits/types.h>        /* This defines __time_t for us.  */
118
119/* POSIX.1b structure for a time value.  This is like a `struct timeval' but
120   has nanoseconds instead of microseconds.  */
121struct timespec
122  {
123    __time_t tv_sec;            /* Seconds.  */
124    long int tv_nsec;           /* Nanoseconds.  */
125  };
126
127#endif /* timespec not defined and <time.h> or need timespec.  */
128#undef  __need_timespec
129
130
131#ifdef  _TIME_H
132__BEGIN_NAMESPACE_STD
133/* Used by other time functions.  */
134struct tm
135{
136  int tm_sec;                   /* Seconds.     [0-60] (1 leap second) */
137  int tm_min;                   /* Minutes.     [0-59] */
138  int tm_hour;                  /* Hours.       [0-23] */
139  int tm_mday;                  /* Day.         [1-31] */
140  int tm_mon;                   /* Month.       [0-11] */
141  int tm_year;                  /* Year - 1900.  */
142  int tm_wday;                  /* Day of week. [0-6] */
143  int tm_yday;                  /* Days in year.[0-365] */
144  int tm_isdst;                 /* DST.         [-1/0/1]*/
145
146#ifdef  __USE_BSD
147  long int tm_gmtoff;           /* Seconds east of UTC.  */
148  __const char *tm_zone;        /* Timezone abbreviation.  */
149#else
150  long int __tm_gmtoff;         /* Seconds east of UTC.  */
151  __const char *__tm_zone;      /* Timezone abbreviation.  */
152#endif
153};
154__END_NAMESPACE_STD
155#if defined __USE_XOPEN || defined __USE_POSIX || defined __USE_MISC
156__USING_NAMESPACE_STD(tm)
157#endif
158
159
160#ifdef __USE_POSIX199309
161/* POSIX.1b structure for timer start values and intervals.  */
162struct itimerspec
163  {
164    struct timespec it_interval;
165    struct timespec it_value;
166  };
167
168/* We can use a simple forward declaration.  */
169struct sigevent;
170
171#endif  /* POSIX.1b */
172
173#ifdef __USE_XOPEN2K
174# ifndef __pid_t_defined
175typedef __pid_t pid_t;
176#  define __pid_t_defined
177# endif
178#endif
179
180
181__BEGIN_NAMESPACE_STD
182/* Time used by the program so far (user time + system time).
183   The result / CLOCKS_PER_SECOND is program time in seconds.  */
184extern clock_t clock (void) __THROW;
185
186/* Return the current time and put it in *TIMER if TIMER is not NULL.  */
187extern time_t time (time_t *__timer) __THROW;
188
189/* Return the difference between TIME1 and TIME0.  */
190extern double difftime (time_t __time1, time_t __time0)
191     __THROW __attribute__ ((__const__));
192
193/* Return the `time_t' representation of TP and normalize TP.  */
194extern time_t mktime (struct tm *__tp) __THROW;
195
196
197/* Format TP into S according to FORMAT.
198   Write no more than MAXSIZE characters and return the number
199   of characters written, or 0 if it would exceed MAXSIZE.  */
200extern size_t strftime (char *__restrict __s, size_t __maxsize,
201                        __const char *__restrict __format,
202                        __const struct tm *__restrict __tp) __THROW;
203__END_NAMESPACE_STD
204
205# ifdef __USE_XOPEN
206/* Parse S according to FORMAT and store binary time information in TP.
207   The return value is a pointer to the first unparsed character in S.  */
208extern char *strptime (__const char *__restrict __s,
209                       __const char *__restrict __fmt, struct tm *__tp)
210     __THROW;
211# endif
212
213# ifdef __USE_GNU
214/* Similar to the two functions above but take the information from
215   the provided locale and not the global locale.  */
216# include <xlocale.h>
217
218extern size_t strftime_l (char *__restrict __s, size_t __maxsize,
219                          __const char *__restrict __format,
220                          __const struct tm *__restrict __tp,
221                          __locale_t __loc) __THROW;
222
223extern char *strptime_l (__const char *__restrict __s,
224                         __const char *__restrict __fmt, struct tm *__tp,
225                         __locale_t __loc) __THROW;
226# endif
227
228
229__BEGIN_NAMESPACE_STD
230/* Return the `struct tm' representation of *TIMER
231   in Universal Coordinated Time (aka Greenwich Mean Time).  */
232extern struct tm *gmtime (__const time_t *__timer) __THROW;
233
234/* Return the `struct tm' representation
235   of *TIMER in the local timezone.  */
236extern struct tm *localtime (__const time_t *__timer) __THROW;
237__END_NAMESPACE_STD
238
239# if defined __USE_POSIX || defined __USE_MISC
240/* Return the `struct tm' representation of *TIMER in UTC,
241   using *TP to store the result.  */
242extern struct tm *gmtime_r (__const time_t *__restrict __timer,
243                            struct tm *__restrict __tp) __THROW;
244
245/* Return the `struct tm' representation of *TIMER in local time,
246   using *TP to store the result.  */
247extern struct tm *localtime_r (__const time_t *__restrict __timer,
248                               struct tm *__restrict __tp) __THROW;
249# endif /* POSIX or misc */
250
251__BEGIN_NAMESPACE_STD
252/* Return a string of the form "Day Mon dd hh:mm:ss yyyy\n"
253   that is the representation of TP in this format.  */
254extern char *asctime (__const struct tm *__tp) __THROW;
255
256/* Equivalent to `asctime (localtime (timer))'.  */
257extern char *ctime (__const time_t *__timer) __THROW;
258__END_NAMESPACE_STD
259
260# if defined __USE_POSIX || defined __USE_MISC
261/* Reentrant versions of the above functions.  */
262
263/* Return in BUF a string of the form "Day Mon dd hh:mm:ss yyyy\n"
264   that is the representation of TP in this format.  */
265extern char *asctime_r (__const struct tm *__restrict __tp,
266                        char *__restrict __buf) __THROW;
267
268/* Equivalent to `asctime_r (localtime_r (timer, *TMP*), buf)'.  */
269extern char *ctime_r (__const time_t *__restrict __timer,
270                      char *__restrict __buf) __THROW;
271# endif /* POSIX or misc */
272
273
274/* Defined in localtime.c.  */
275extern char *__tzname[2];       /* Current timezone names.  */
276extern int __daylight;          /* If daylight-saving time is ever in use.  */
277extern long int __timezone;     /* Seconds west of UTC.  */
278
279
280# ifdef __USE_POSIX
281/* Same as above.  */
282extern char *tzname[2];
283
284/* Set time conversion information from the TZ environment variable.
285   If TZ is not defined, a locale-dependent default is used.  */
286extern void tzset (void) __THROW;
287# endif
288
289# if defined __USE_SVID || defined __USE_XOPEN
290extern int daylight;
291extern long int timezone;
292# endif
293
294# ifdef __USE_SVID
295/* Set the system time to *WHEN.
296   This call is restricted to the superuser.  */
297extern int stime (__const time_t *__when) __THROW;
298# endif
299
300
301/* Nonzero if YEAR is a leap year (every 4 years,
302   except every 100th isn't, and every 400th is).  */
303# define __isleap(year) \
304  ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
305
306
307# ifdef __USE_MISC
308/* Miscellaneous functions many Unices inherited from the public domain
309   localtime package.  These are included only for compatibility.  */
310
311/* Like `mktime', but for TP represents Universal Time, not local time.  */
312extern time_t timegm (struct tm *__tp) __THROW;
313
314/* Another name for `mktime'.  */
315extern time_t timelocal (struct tm *__tp) __THROW;
316
317/* Return the number of days in YEAR.  */
318extern int dysize (int __year) __THROW  __attribute__ ((__const__));
319# endif
320
321
322# ifdef __USE_POSIX199309
323/* Pause execution for a number of nanoseconds.
324
325   This function is a cancellation point and therefore not marked with
326   __THROW.  */
327extern int nanosleep (__const struct timespec *__requested_time,
328                      struct timespec *__remaining);
329
330
331/* Get resolution of clock CLOCK_ID.  */
332extern int clock_getres (clockid_t __clock_id, struct timespec *__res) __THROW;
333
334/* Get current value of clock CLOCK_ID and store it in TP.  */
335extern int clock_gettime (clockid_t __clock_id, struct timespec *__tp) __THROW;
336
337/* Set clock CLOCK_ID to value TP.  */
338extern int clock_settime (clockid_t __clock_id, __const struct timespec *__tp)
339     __THROW;
340
341#  ifdef __USE_XOPEN2K
342/* High-resolution sleep with the specified clock.
343
344   This function is a cancellation point and therefore not marked with
345   __THROW.  */
346extern int clock_nanosleep (clockid_t __clock_id, int __flags,
347                            __const struct timespec *__req,
348                            struct timespec *__rem);
349
350/* Return clock ID for CPU-time clock.  */
351extern int clock_getcpuclockid (pid_t __pid, clockid_t *__clock_id) __THROW;
352#  endif
353
354
355/* Create new per-process timer using CLOCK_ID.  */
356extern int timer_create (clockid_t __clock_id,
357                         struct sigevent *__restrict __evp,
358                         timer_t *__restrict __timerid) __THROW;
359
360/* Delete timer TIMERID.  */
361extern int timer_delete (timer_t __timerid) __THROW;
362
363/* Set timer TIMERID to VALUE, returning old value in OVLAUE.  */
364extern int timer_settime (timer_t __timerid, int __flags,
365                          __const struct itimerspec *__restrict __value,
366                          struct itimerspec *__restrict __ovalue) __THROW;
367
368/* Get current value of timer TIMERID and store it in VLAUE.  */
369extern int timer_gettime (timer_t __timerid, struct itimerspec *__value)
370     __THROW;
371
372/* Get expiration overrun for timer TIMERID.  */
373extern int timer_getoverrun (timer_t __timerid) __THROW;
374# endif
375
376
377# ifdef __USE_XOPEN_EXTENDED
378/* Set to one of the following values to indicate an error.
379     1  the DATEMSK environment variable is null or undefined,
380     2  the template file cannot be opened for reading,
381     3  failed to get file status information,
382     4  the template file is not a regular file,
383     5  an error is encountered while reading the template file,
384     6  memory allication failed (not enough memory available),
385     7  there is no line in the template that matches the input,
386     8  invalid input specification Example: February 31 or a time is
387        specified that can not be represented in a time_t (representing
388        the time in seconds since 00:00:00 UTC, January 1, 1970) */
389extern int getdate_err;
390
391/* Parse the given string as a date specification and return a value
392   representing the value.  The templates from the file identified by
393   the environment variable DATEMSK are used.  In case of an error
394   `getdate_err' is set.
395
396   This function is a possible cancellation points and therefore not
397   marked with __THROW.  */
398extern struct tm *getdate (__const char *__string);
399# endif
400
401# ifdef __USE_GNU
402/* Since `getdate' is not reentrant because of the use of `getdate_err'
403   and the static buffer to return the result in, we provide a thread-safe
404   variant.  The functionality is the same.  The result is returned in
405   the buffer pointed to by RESBUFP and in case of an error the return
406   value is != 0 with the same values as given above for `getdate_err'.
407
408   This function is not part of POSIX and therefore no official
409   cancellation point.  But due to similarity with an POSIX interface
410   or due to the implementation it is a cancellation point and
411   therefore not marked with __THROW.  */
412extern int getdate_r (__const char *__restrict __string,
413                      struct tm *__restrict __resbufp);
414# endif
415
416__END_DECLS
417
418#endif /* <time.h> included.  */
419
420#endif /* <time.h> not already included.  */
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