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
26#ifndef _LIBCPP_HAS_NO_MONOTONIC_CLOCK
27class _LIBCPP_TYPE_VIS steady_clock
28{
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    static time_point now() _NOEXCEPT;
37};
38#endif
39
40} // namespace chrono
41
42_LIBCPP_END_NAMESPACE_STD
43
44#endif // _LIBCPP___CHRONO_STEADY_CLOCK_H
45