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_FILE_CLOCK_H 11 #define _LIBCPP___CHRONO_FILE_CLOCK_H 12 13 #include <__chrono/duration.h> 14 #include <__chrono/system_clock.h> 15 #include <__chrono/time_point.h> 16 #include <__config> 17 #include <ratio> 18 19 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 20 # pragma GCC system_header 21 #endif 22 23 #ifndef _LIBCPP_CXX03_LANG 24 _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM 25 struct _FilesystemClock; 26 _LIBCPP_END_NAMESPACE_FILESYSTEM 27 #endif // !_LIBCPP_CXX03_LANG 28 29 #if _LIBCPP_STD_VER >= 20 30 31 _LIBCPP_BEGIN_NAMESPACE_STD 32 33 namespace chrono { 34 35 // [time.clock.file], type file_clock 36 using file_clock = filesystem::_FilesystemClock; 37 38 template <class _Duration> 39 using file_time = time_point<file_clock, _Duration>; 40 41 } // namespace chrono 42 43 _LIBCPP_END_NAMESPACE_STD 44 45 #endif // _LIBCPP_STD_VER >= 20 46 47 #ifndef _LIBCPP_CXX03_LANG 48 _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM 49 struct _FilesystemClock { 50 # if !defined(_LIBCPP_HAS_NO_INT128) 51 typedef __int128_t rep; 52 typedef nano period; 53 # else 54 typedef long long rep; 55 typedef nano period; 56 # endif 57 58 typedef chrono::duration<rep, period> duration; 59 typedef chrono::time_point<_FilesystemClock> time_point; 60 61 _LIBCPP_EXPORTED_FROM_ABI static _LIBCPP_CONSTEXPR_SINCE_CXX14 const bool is_steady = false; 62 63 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_EXPORTED_FROM_ABI static time_point now() noexcept; 64 65 # if _LIBCPP_STD_VER >= 20 66 template <class _Duration> 67 _LIBCPP_HIDE_FROM_ABI static chrono::sys_time<_Duration> to_sys(const chrono::file_time<_Duration>& __t) { 68 return chrono::sys_time<_Duration>(__t.time_since_epoch()); 69 } 70 71 template <class _Duration> 72 _LIBCPP_HIDE_FROM_ABI static chrono::file_time<_Duration> from_sys(const chrono::sys_time<_Duration>& __t) { 73 return chrono::file_time<_Duration>(__t.time_since_epoch()); 74 } 75 # endif // _LIBCPP_STD_VER >= 20 76 }; 77 _LIBCPP_END_NAMESPACE_FILESYSTEM 78 #endif // !_LIBCPP_CXX03_LANG 79 80 #endif // _LIBCPP___CHRONO_FILE_CLOCK_H 81