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1 | // chrono -*- C++ -*- |
2 | ||
3 | // Copyright (C) 2008 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 2, 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 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING. If not, write to the Free | |
18 | // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, | |
19 | // USA. | |
20 | ||
21 | // As a special exception, you may use this file as part of a free software | |
22 | // library without restriction. Specifically, if other files instantiate | |
23 | // templates or use macros or inline functions from this file, or you compile | |
24 | // this file and link it with other files to produce an executable, this | |
25 | // file does not by itself cause the resulting executable to be covered by | |
26 | // the GNU General Public License. This exception does not however | |
27 | // invalidate any other reasons why the executable file might be covered by | |
28 | // the GNU General Public License. | |
29 | ||
30 | #include <chrono> | |
31 | ||
32 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 | |
33 | ||
34 | // conditional inclusion of sys/time.h for gettimeofday | |
35 | #if !defined(_GLIBCXX_USE_CLOCK_MONOTONIC) && \ | |
36 | !defined(_GLIBCXX_USE_CLOCK_REALTIME) && \ | |
37 | defined(_GLIBCXX_USE_GETTIMEOFDAY) | |
38 | #include <sys/time.h> | |
39 | #endif | |
40 | ||
41 | namespace std | |
42 | { | |
43 | namespace chrono | |
44 | { | |
45 | const bool system_clock::is_monotonic; | |
46 | ||
47 | system_clock::time_point | |
48 | system_clock::now() | |
49 | { | |
88399079 CF |
50 | #ifdef _GLIBCXX_USE_CLOCK_REALTIME |
51 | timespec tp; | |
52 | // -EINVAL, -EFAULT | |
53 | clock_gettime(CLOCK_REALTIME, &tp); | |
54 | return time_point(duration(chrono::seconds(tp.tv_sec) | |
55 | + chrono::nanoseconds(tp.tv_nsec))); | |
15e38d0d | 56 | #elif defined(_GLIBCXX_USE_GETTIMEOFDAY) |
88399079 CF |
57 | timeval tv; |
58 | // EINVAL, EFAULT | |
59 | gettimeofday(&tv, NULL); | |
60 | return time_point(duration(chrono::seconds(tv.tv_sec) | |
61 | + chrono::microseconds(tv.tv_usec))); | |
15e38d0d | 62 | #else |
88399079 CF |
63 | std::time_t __sec = std::time(0); |
64 | return system_clock::from_time_t(__sec); | |
15e38d0d CF |
65 | #endif |
66 | } | |
88399079 CF |
67 | |
68 | #ifdef _GLIBCXX_USE_CLOCK_MONOTONIC | |
69 | const bool monotonic_clock::is_monotonic; | |
70 | ||
71 | monotonic_clock::time_point | |
72 | monotonic_clock::now() | |
73 | { | |
74 | timespec tp; | |
75 | // -EINVAL, -EFAULT | |
76 | clock_gettime(CLOCK_MONOTONIC, &tp); | |
77 | return time_point(duration(chrono::seconds(tp.tv_sec) | |
78 | + chrono::nanoseconds(tp.tv_nsec))); | |
79 | } | |
80 | #endif | |
15e38d0d CF |
81 | } |
82 | } | |
83 | ||
84 | #endif // _GLIBCXX_USE_C99_STDINT_TR1 |