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_STEADY_CLOCK_H 11#define _LIBCPP___CHRONO_STEADY_CLOCK_H 12 13#include <__chrono/duration.h> 14#include <__chrono/time_point.h> 15#include <__config> 16 17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18# pragma GCC system_header 19#endif 20 21_LIBCPP_BEGIN_NAMESPACE_STD 22 23namespace chrono { 24 25#ifndef _LIBCPP_HAS_NO_MONOTONIC_CLOCK 26class _LIBCPP_EXPORTED_FROM_ABI steady_clock { 27public: 28 typedef nanoseconds duration; 29 typedef duration::rep rep; 30 typedef duration::period period; 31 typedef chrono::time_point<steady_clock, duration> time_point; 32 static _LIBCPP_CONSTEXPR_SINCE_CXX14 const bool is_steady = true; 33 34 static time_point now() _NOEXCEPT; 35}; 36#endif 37 38} // namespace chrono 39 40_LIBCPP_END_NAMESPACE_STD 41 42#endif // _LIBCPP___CHRONO_STEADY_CLOCK_H 43