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// Compatibility symbols for previous versions, C++0x bits -*- C++ -*- |
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// Copyright (C) 2013-2015 Free Software Foundation, Inc. |
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// |
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// This file is part of the GNU ISO C++ Library. This library is free |
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// software; you can redistribute it and/or modify it under the |
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// terms of the GNU General Public License as published by the |
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// Free Software Foundation; either version 3, or (at your option) |
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// any later version. |
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// This library is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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// Under Section 7 of GPL version 3, you are granted additional |
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// permissions described in the GCC Runtime Library Exception, version |
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// 3.1, as published by the Free Software Foundation. |
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// You should have received a copy of the GNU General Public License and |
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// a copy of the GCC Runtime Library Exception along with this program; |
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
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// . |
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#include |
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#ifdef _GLIBCXX_USE_C99_STDINT_TR1 |
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#ifdef _GLIBCXX_USE_GETTIMEOFDAY |
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#include |
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#endif |
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#define system_clock system_clockXX |
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#define steady_clock steady_clockXX |
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#include |
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#undef system_clock |
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#undef steady_clock |
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namespace std _GLIBCXX_VISIBILITY(default) |
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{ |
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namespace chrono |
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{ |
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_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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// NB: Default configuration was no realtime. |
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struct system_clock |
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{ |
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#ifdef _GLIBCXX_USE_GETTIMEOFDAY |
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typedef chrono::microseconds duration; |
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#else |
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typedef chrono::seconds duration; |
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#endif |
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typedef duration::rep rep; |
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typedef duration::period period; |
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typedef chrono::time_point time_point; |
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static_assert(system_clock::duration::min() |
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< system_clock::duration::zero(), |
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"a clock's minimum duration cannot be less than its epoch"); |
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static constexpr bool is_steady = false; |
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static time_point |
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now() noexcept; |
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}; |
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constexpr bool system_clock::is_steady; |
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system_clock::time_point |
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system_clock::now() noexcept |
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{ |
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#ifdef _GLIBCXX_USE_GETTIMEOFDAY |
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timeval tv; |
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// EINVAL, EFAULT |
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gettimeofday(&tv, 0); |
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return time_point(duration(chrono::seconds(tv.tv_sec) |
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+ chrono::microseconds(tv.tv_usec))); |
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#else |
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std::time_t __sec = std::time(0); |
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// This is the conversion done by system_clock::from_time_t(__sec) |
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typedef chrono::time_point __from; |
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return time_point_cast |
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(__from(chrono::seconds(__sec))); |
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#endif |
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} |
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_GLIBCXX_END_NAMESPACE_VERSION |
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} // namespace chrono |
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} // namespace std |
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#endif // _GLIBCXX_USE_C99_STDINT_TR1 |