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