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#if _LIBCPP_HAS_MONOTONIC_CLOCK
22
23_LIBCPP_BEGIN_NAMESPACE_STD
24_LIBCPP_BEGIN_EXPLICIT_ABI_ANNOTATIONS
25
26namespace chrono {
27
28class _LIBCPP_EXPORTED_FROM_ABI steady_clock {
29public:
30 typedef nanoseconds duration;
31 typedef duration::rep rep;
32 typedef duration::period period;
33 typedef chrono::time_point<steady_clock, duration> time_point;
34 static _LIBCPP_CONSTEXPR_SINCE_CXX14 const bool is_steady = true;
35
36 [[__nodiscard__]] static time_point now() _NOEXCEPT;
37};
38
39} // namespace chrono
40
41_LIBCPP_END_EXPLICIT_ABI_ANNOTATIONS
42_LIBCPP_END_NAMESPACE_STD
43
44#endif
45
46#endif // _LIBCPP___CHRONO_STEADY_CLOCK_H
47