projects / thirdparty / gcc.git / blame
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| 2e8a9734 JJ |
1 | // Compatibility symbols for previous versions, C++0x bits -*- C++ -*- |
| 2 | ||
| a5544970 | 3 | // Copyright (C) 2013-2019 Free Software Foundation, Inc. |
| 2e8a9734 JJ |
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 | ||
| 2e8a9734 JJ |
25 | #include <bits/c++config.h> |
| 26 | ||
| 1f08a749 | 27 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1 |
| 2e8a9734 | 28 | |
| 1f08a749 BK |
29 | #ifdef _GLIBCXX_USE_GETTIMEOFDAY |
| 30 | #include <sys/time.h> | |
| 31 | #endif | |
| 32 | ||
| 33 | #define system_clock system_clockXX | |
| 2e8a9734 | 34 | #define steady_clock steady_clockXX |
| 1f08a749 BK |
35 | #include <chrono> |
| 36 | #undef system_clock | |
| 37 | #undef steady_clock | |
| 2e8a9734 | 38 | |
| 1f08a749 BK |
39 | namespace std _GLIBCXX_VISIBILITY(default) |
| 40 | { | |
| 4a15d842 FD |
41 | _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| 42 | ||
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43 | namespace chrono |
| 44 | { | |
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45 | // NB: Default configuration was no realtime. |
| 46 | struct system_clock | |
| 47 | { | |
| 48 | #ifdef _GLIBCXX_USE_GETTIMEOFDAY | |
| 49 | typedef chrono::microseconds duration; | |
| 50 | #else | |
| 51 | typedef chrono::seconds duration; | |
| 2e8a9734 | 52 | #endif |
| 1f08a749 BK |
53 | |
| 54 | typedef duration::rep rep; | |
| 55 | typedef duration::period period; | |
| 56 | typedef chrono::time_point<system_clock, duration> time_point; | |
| 57 | ||
| 58 | static_assert(system_clock::duration::min() | |
| 59 | < system_clock::duration::zero(), | |
| 60 | "a clock's minimum duration cannot be less than its epoch"); | |
| 61 | ||
| 62 | static constexpr bool is_steady = false; | |
| 63 | ||
| 64 | static time_point | |
| 65 | now() noexcept; | |
| 66 | }; | |
| 67 | ||
| 68 | constexpr bool system_clock::is_steady; | |
| 69 | ||
| 70 | system_clock::time_point | |
| 71 | system_clock::now() noexcept | |
| 72 | { | |
| 73 | #ifdef _GLIBCXX_USE_GETTIMEOFDAY | |
| 74 | timeval tv; | |
| 75 | // EINVAL, EFAULT | |
| 76 | gettimeofday(&tv, 0); | |
| 77 | return time_point(duration(chrono::seconds(tv.tv_sec) | |
| 78 | + chrono::microseconds(tv.tv_usec))); | |
| 79 | #else | |
| 80 | std::time_t __sec = std::time(0); | |
| 8b70770d JW |
81 | // This is the conversion done by system_clock::from_time_t(__sec) |
| 82 | typedef chrono::time_point<system_clock, seconds> __from; | |
| 83 | return time_point_cast<system_clock::duration> | |
| 84 | (__from(chrono::seconds(__sec))); | |
| 1f08a749 BK |
85 | #endif |
| 86 | } | |
| 1f08a749 | 87 | } // namespace chrono |
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88 | |
| 89 | _GLIBCXX_END_NAMESPACE_VERSION | |
| 1f08a749 BK |
90 | } // namespace std |
| 91 | ||
| 92 | #endif // _GLIBCXX_USE_C99_STDINT_TR1 |