1// -*- C++ -*- 2//===----------------------------------------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP___CHRONO_SYSTEM_CLOCK_H 11#define _LIBCPP___CHRONO_SYSTEM_CLOCK_H 12 13#include <__chrono/duration.h> 14#include <__chrono/time_point.h> 15#include <__config> 16#include <ctime> 17 18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19# pragma GCC system_header 20#endif 21 22_LIBCPP_BEGIN_NAMESPACE_STD 23 24namespace chrono { 25 26class _LIBCPP_EXPORTED_FROM_ABI system_clock { 27public: 28 typedef microseconds duration; 29 typedef duration::rep rep; 30 typedef duration::period period; 31 typedef chrono::time_point<system_clock> time_point; 32 static _LIBCPP_CONSTEXPR_SINCE_CXX14 const bool is_steady = false; 33 34 static time_point now() _NOEXCEPT; 35 static time_t to_time_t(const time_point& __t) _NOEXCEPT; 36 static time_point from_time_t(time_t __t) _NOEXCEPT; 37}; 38 39#if _LIBCPP_STD_VER >= 20 40 41template <class _Duration> 42using sys_time = time_point<system_clock, _Duration>; 43using sys_seconds = sys_time<seconds>; 44using sys_days = sys_time<days>; 45 46#endif 47 48} // namespace chrono 49 50_LIBCPP_END_NAMESPACE_STD 51 52#endif // _LIBCPP___CHRONO_SYSTEM_CLOCK_H 53