1*4bdff4beSrobert // -*- C++ -*-
2*4bdff4beSrobert //===----------------------------------------------------------------------===//
3*4bdff4beSrobert //
4*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information.
6*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7*4bdff4beSrobert //
8*4bdff4beSrobert //===----------------------------------------------------------------------===//
9*4bdff4beSrobert 
10*4bdff4beSrobert #ifndef _LIBCPP___CHRONO_SYSTEM_CLOCK_H
11*4bdff4beSrobert #define _LIBCPP___CHRONO_SYSTEM_CLOCK_H
12*4bdff4beSrobert 
13*4bdff4beSrobert #include <__chrono/duration.h>
14*4bdff4beSrobert #include <__chrono/time_point.h>
15*4bdff4beSrobert #include <__config>
16*4bdff4beSrobert #include <ctime>
17*4bdff4beSrobert 
18*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
19*4bdff4beSrobert #  pragma GCC system_header
20*4bdff4beSrobert #endif
21*4bdff4beSrobert 
22*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD
23*4bdff4beSrobert 
24*4bdff4beSrobert namespace chrono
25*4bdff4beSrobert {
26*4bdff4beSrobert 
27*4bdff4beSrobert class _LIBCPP_TYPE_VIS system_clock
28*4bdff4beSrobert {
29*4bdff4beSrobert public:
30*4bdff4beSrobert     typedef microseconds                     duration;
31*4bdff4beSrobert     typedef duration::rep                    rep;
32*4bdff4beSrobert     typedef duration::period                 period;
33*4bdff4beSrobert     typedef chrono::time_point<system_clock> time_point;
34*4bdff4beSrobert     static _LIBCPP_CONSTEXPR_SINCE_CXX14 const bool is_steady = false;
35*4bdff4beSrobert 
36*4bdff4beSrobert     static time_point now() _NOEXCEPT;
37*4bdff4beSrobert     static time_t     to_time_t  (const time_point& __t) _NOEXCEPT;
38*4bdff4beSrobert     static time_point from_time_t(time_t __t) _NOEXCEPT;
39*4bdff4beSrobert };
40*4bdff4beSrobert 
41*4bdff4beSrobert #if _LIBCPP_STD_VER > 17
42*4bdff4beSrobert 
43*4bdff4beSrobert template <class _Duration>
44*4bdff4beSrobert using sys_time    = time_point<system_clock, _Duration>;
45*4bdff4beSrobert using sys_seconds = sys_time<seconds>;
46*4bdff4beSrobert using sys_days    = sys_time<days>;
47*4bdff4beSrobert 
48*4bdff4beSrobert #endif
49*4bdff4beSrobert 
50*4bdff4beSrobert } // namespace chrono
51*4bdff4beSrobert 
52*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD
53*4bdff4beSrobert 
54*4bdff4beSrobert #endif // _LIBCPP___CHRONO_SYSTEM_CLOCK_H
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