Merge branch 'master' into boehm-demers-weiser-gc
[bpt/guile.git] / lib / time.in.h
1 /* A more-standard <time.h>.
2
3 Copyright (C) 2007-2009 Free Software Foundation, Inc.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
8 any later version.
9
10 This program 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
13 GNU Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18
19 #if __GNUC__ >= 3
20 @PRAGMA_SYSTEM_HEADER@
21 #endif
22
23 /* Don't get in the way of glibc when it includes time.h merely to
24 declare a few standard symbols, rather than to declare all the
25 symbols. Also, Solaris 8 <time.h> eventually includes itself
26 recursively; if that is happening, just include the system <time.h>
27 without adding our own declarations. */
28 #if (defined __need_time_t || defined __need_clock_t \
29 || defined __need_timespec \
30 || defined _GL_TIME_H)
31
32 # @INCLUDE_NEXT@ @NEXT_TIME_H@
33
34 #else
35
36 # define _GL_TIME_H
37
38 # @INCLUDE_NEXT@ @NEXT_TIME_H@
39
40 # ifdef __cplusplus
41 extern "C" {
42 # endif
43
44 /* Some systems don't define struct timespec (e.g., AIX 4.1, Ultrix 4.3).
45 Or they define it with the wrong member names or define it in <sys/time.h>
46 (e.g., FreeBSD circa 1997). */
47 # if ! @TIME_H_DEFINES_STRUCT_TIMESPEC@
48 # if @SYS_TIME_H_DEFINES_STRUCT_TIMESPEC@
49 # include <sys/time.h>
50 # else
51 # undef timespec
52 # define timespec rpl_timespec
53 struct timespec
54 {
55 time_t tv_sec;
56 long int tv_nsec;
57 };
58 # endif
59 # endif
60
61 /* Sleep for at least RQTP seconds unless interrupted, If interrupted,
62 return -1 and store the remaining time into RMTP. See
63 <http://www.opengroup.org/susv3xsh/nanosleep.html>. */
64 # if @REPLACE_NANOSLEEP@
65 # define nanosleep rpl_nanosleep
66 int nanosleep (struct timespec const *__rqtp, struct timespec *__rmtp);
67 # endif
68
69 /* Return the 'time_t' representation of TP and normalize TP. */
70 # if @REPLACE_MKTIME@
71 # define mktime rpl_mktime
72 extern time_t mktime (struct tm *__tp);
73 # endif
74
75 /* Convert TIMER to RESULT, assuming local time and UTC respectively. See
76 <http://www.opengroup.org/susv3xsh/localtime_r.html> and
77 <http://www.opengroup.org/susv3xsh/gmtime_r.html>. */
78 # if @REPLACE_LOCALTIME_R@
79 # undef localtime_r
80 # define localtime_r rpl_localtime_r
81 # undef gmtime_r
82 # define gmtime_r rpl_gmtime_r
83 struct tm *localtime_r (time_t const *restrict __timer,
84 struct tm *restrict __result);
85 struct tm *gmtime_r (time_t const *restrict __timer,
86 struct tm *restrict __result);
87 # endif
88
89 /* Parse BUF as a time stamp, assuming FORMAT specifies its layout, and store
90 the resulting broken-down time into TM. See
91 <http://www.opengroup.org/susv3xsh/strptime.html>. */
92 # if @REPLACE_STRPTIME@
93 # undef strptime
94 # define strptime rpl_strptime
95 char *strptime (char const *restrict __buf, char const *restrict __format,
96 struct tm *restrict __tm);
97 # endif
98
99 /* Convert TM to a time_t value, assuming UTC. */
100 # if @REPLACE_TIMEGM@
101 # undef timegm
102 # define timegm rpl_timegm
103 time_t timegm (struct tm *__tm);
104 # endif
105
106 /* Encourage applications to avoid unsafe functions that can overrun
107 buffers when given outlandish struct tm values. Portable
108 applications should use strftime (or even sprintf) instead. */
109 # if GNULIB_PORTCHECK
110 # undef asctime
111 # define asctime eschew_asctime
112 # undef asctime_r
113 # define asctime_r eschew_asctime_r
114 # undef ctime
115 # define ctime eschew_ctime
116 # undef ctime_r
117 # define ctime_r eschew_ctime_r
118 # endif
119
120 # ifdef __cplusplus
121 }
122 # endif
123
124 #endif