| 0,0 → 1,105 |
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| // chrono -*- C++ -*- |
| |
| // Copyright (C) 2008-2015 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // Under Section 7 of GPL version 3, you are granted additional |
| // permissions described in the GCC Runtime Library Exception, version |
| // 3.1, as published by the Free Software Foundation. |
| |
| // You should have received a copy of the GNU General Public License and |
| // a copy of the GCC Runtime Library Exception along with this program; |
| // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| // <http://www.gnu.org/licenses/>. |
| |
| #include <bits/c++config.h> |
| #include <chrono> |
| |
| #ifdef _GLIBCXX_USE_C99_STDINT_TR1 |
| |
| // Conditional inclusion of sys/time.h for gettimeofday |
| #if !defined(_GLIBCXX_USE_CLOCK_MONOTONIC) && \ |
| !defined(_GLIBCXX_USE_CLOCK_REALTIME) && \ |
| defined(_GLIBCXX_USE_GETTIMEOFDAY) |
| #include <sys/time.h> |
| #endif |
| |
| #ifdef _GLIBCXX_USE_CLOCK_GETTIME_SYSCALL |
| #include <unistd.h> |
| #include <sys/syscall.h> |
| #endif |
| |
| namespace std _GLIBCXX_VISIBILITY(default) |
| { |
| namespace chrono |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| // XXX GLIBCXX_ABI Deprecated |
| inline namespace _V2 { |
| |
| constexpr bool system_clock::is_steady; |
| |
| system_clock::time_point |
| system_clock::now() noexcept |
| { |
| #ifdef _GLIBCXX_USE_CLOCK_REALTIME |
| timespec tp; |
| // -EINVAL, -EFAULT |
| #ifdef _GLIBCXX_USE_CLOCK_GETTIME_SYSCALL |
| syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp); |
| #else |
| clock_gettime(CLOCK_REALTIME, &tp); |
| #endif |
| return time_point(duration(chrono::seconds(tp.tv_sec) |
| + chrono::nanoseconds(tp.tv_nsec))); |
| #elif defined(_GLIBCXX_USE_GETTIMEOFDAY) |
| timeval tv; |
| // EINVAL, EFAULT |
| gettimeofday(&tv, 0); |
| return time_point(duration(chrono::seconds(tv.tv_sec) |
| + chrono::microseconds(tv.tv_usec))); |
| #else |
| std::time_t __sec = std::time(0); |
| return system_clock::from_time_t(__sec); |
| #endif |
| } |
| |
| |
| constexpr bool steady_clock::is_steady; |
| |
| steady_clock::time_point |
| steady_clock::now() noexcept |
| { |
| #ifdef _GLIBCXX_USE_CLOCK_MONOTONIC |
| timespec tp; |
| // -EINVAL, -EFAULT |
| #ifdef _GLIBCXX_USE_CLOCK_GETTIME_SYSCALL |
| syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &tp); |
| #else |
| clock_gettime(CLOCK_MONOTONIC, &tp); |
| #endif |
| return time_point(duration(chrono::seconds(tp.tv_sec) |
| + chrono::nanoseconds(tp.tv_nsec))); |
| #else |
| return time_point(system_clock::now().time_since_epoch()); |
| #endif |
| } |
| |
| } // end inline namespace _V2 |
| |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } // namespace chrono |
| } // namespace std |
| |
| #endif // _GLIBCXX_USE_C99_STDINT_TR1 |