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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-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___CHRONO_SYSTEM_CLOCK_H11#define _LIBCPP___CHRONO_SYSTEM_CLOCK_H12 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_header20#endif21 22_LIBCPP_BEGIN_NAMESPACE_STD23 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 >= 2040 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#endif47 48} // namespace chrono49 50_LIBCPP_END_NAMESPACE_STD51 52#endif // _LIBCPP___CHRONO_SYSTEM_CLOCK_H53