libstdc++
ctime
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1 // -*- C++ -*- forwarding header.
2 
3 // Copyright (C) 1997-2025 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
10 
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
15 
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
19 
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
24 
25 /** @file include/ctime
26  * This is a Standard C++ Library file. You should @c \#include this file
27  * in your programs, rather than any of the @a *.h implementation files.
28  *
29  * This is the C++ version of the Standard C Library header @c time.h,
30  * and its contents are (mostly) the same as that header, but are all
31  * contained in the namespace @c std (except for names which are defined
32  * as macros in C).
33  */
34 
35 //
36 // ISO C++ 14882: 20.5 Date and time
37 //
38 
39 #ifndef _GLIBCXX_CTIME
40 #define _GLIBCXX_CTIME 1
41 
42 #ifdef _GLIBCXX_SYSHDR
43 #pragma GCC system_header
44 #endif
45 
46 #include <bits/c++config.h>
47 #include <time.h>
48 
49 // Get rid of those macros defined in <time.h> in lieu of real functions.
50 #undef clock
51 #undef difftime
52 #undef mktime
53 #undef time
54 #undef asctime
55 #undef ctime
56 #undef gmtime
57 #undef localtime
58 #undef strftime
59 
60 namespace std
61 {
62  using ::clock_t;
63  using ::time_t;
64  using ::tm;
65 
66  using ::clock;
67  using ::difftime;
68  using ::mktime;
69  using ::time;
70  using ::asctime;
71  using ::ctime;
72  using ::gmtime;
73  using ::localtime;
74  using ::strftime;
75 } // namespace
76 
77 #if __cplusplus >= 201703L && defined(_GLIBCXX_HAVE_TIMESPEC_GET)
78 #undef timespec_get
79 namespace std
80 {
81  using ::timespec;
82  using ::timespec_get;
83 } // namespace std
84 #endif
85 
86 #endif