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1 | // chrono -*- C++ -*- |
2 | ||
12ffa228 | 3 | // Copyright (C) 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
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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 | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
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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 | ||
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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/>. | |
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24 | |
25 | #include <chrono> | |
26 | ||
27 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 | |
28 | ||
29 | // conditional inclusion of sys/time.h for gettimeofday | |
30 | #if !defined(_GLIBCXX_USE_CLOCK_MONOTONIC) && \ | |
31 | !defined(_GLIBCXX_USE_CLOCK_REALTIME) && \ | |
32 | defined(_GLIBCXX_USE_GETTIMEOFDAY) | |
33 | #include <sys/time.h> | |
34 | #endif | |
35 | ||
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36 | namespace std _GLIBCXX_VISIBILITY(default) |
37 | { | |
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38 | namespace chrono |
39 | { | |
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40 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
41 | ||
42 | constexpr bool system_clock::is_monotonic; | |
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43 | |
44 | system_clock::time_point | |
50a681c4 | 45 | system_clock::now() throw () |
15e38d0d | 46 | { |
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47 | #ifdef _GLIBCXX_USE_CLOCK_REALTIME |
48 | timespec tp; | |
49 | // -EINVAL, -EFAULT | |
50 | clock_gettime(CLOCK_REALTIME, &tp); | |
51 | return time_point(duration(chrono::seconds(tp.tv_sec) | |
52 | + chrono::nanoseconds(tp.tv_nsec))); | |
15e38d0d | 53 | #elif defined(_GLIBCXX_USE_GETTIMEOFDAY) |
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54 | timeval tv; |
55 | // EINVAL, EFAULT | |
8fc81078 | 56 | gettimeofday(&tv, 0); |
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57 | return time_point(duration(chrono::seconds(tv.tv_sec) |
58 | + chrono::microseconds(tv.tv_usec))); | |
15e38d0d | 59 | #else |
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60 | std::time_t __sec = std::time(0); |
61 | return system_clock::from_time_t(__sec); | |
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62 | #endif |
63 | } | |
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64 | |
65 | #ifdef _GLIBCXX_USE_CLOCK_MONOTONIC | |
85db9dcc | 66 | constexpr bool monotonic_clock::is_monotonic; |
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67 | |
68 | monotonic_clock::time_point | |
69 | monotonic_clock::now() | |
70 | { | |
71 | timespec tp; | |
72 | // -EINVAL, -EFAULT | |
73 | clock_gettime(CLOCK_MONOTONIC, &tp); | |
74 | return time_point(duration(chrono::seconds(tp.tv_sec) | |
75 | + chrono::nanoseconds(tp.tv_nsec))); | |
76 | } | |
77 | #endif | |
53dc5044 | 78 | |
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79 | _GLIBCXX_END_NAMESPACE_VERSION |
80 | } // namespace chrono | |
81 | } // namespace std | |
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82 | |
83 | #endif // _GLIBCXX_USE_C99_STDINT_TR1 |