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 <__availability> 14 #include <__chrono/duration.h> 15 #include <__chrono/system_clock.h> 16 #include <__chrono/time_point.h> 17 #include <__config> 18 #include <ratio> 19 20 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 21 # pragma GCC system_header 22 #endif 23 24 #ifndef _LIBCPP_CXX03_LANG 25 _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM 26 struct _FilesystemClock; 27 _LIBCPP_END_NAMESPACE_FILESYSTEM 28 #endif // !_LIBCPP_CXX03_LANG 29 30 #if _LIBCPP_STD_VER >= 20 31 32 _LIBCPP_BEGIN_NAMESPACE_STD 33 34 namespace chrono 35 { 36 37 // [time.clock.file], type file_clock 38 using file_clock = _VSTD_FS::_FilesystemClock; 39 40 template<class _Duration> 41 using file_time = time_point<file_clock, _Duration>; 42 43 } // namespace chrono 44 45 _LIBCPP_END_NAMESPACE_STD 46 47 #endif // _LIBCPP_STD_VER >= 20 48 49 #ifndef _LIBCPP_CXX03_LANG 50 _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM 51 struct _FilesystemClock { 52 #if !defined(_LIBCPP_HAS_NO_INT128) 53 typedef __int128_t rep; 54 typedef nano period; 55 #else 56 typedef long long rep; 57 typedef nano period; 58 #endif 59 60 typedef chrono::duration<rep, period> duration; 61 typedef chrono::time_point<_FilesystemClock> time_point; 62 63 _LIBCPP_EXPORTED_FROM_ABI 64 static _LIBCPP_CONSTEXPR_SINCE_CXX14 const bool is_steady = false; 65 66 _LIBCPP_AVAILABILITY_FILESYSTEM_LIBRARY _LIBCPP_EXPORTED_FROM_ABI static time_point now() noexcept; 67 68 #if _LIBCPP_STD_VER >= 20 69 template <class _Duration> 70 _LIBCPP_HIDE_FROM_ABI 71 static chrono::sys_time<_Duration> to_sys(const chrono::file_time<_Duration>& __t) { 72 return chrono::sys_time<_Duration>(__t.time_since_epoch()); 73 } 74 75 template <class _Duration> 76 _LIBCPP_HIDE_FROM_ABI 77 static chrono::file_time<_Duration> from_sys(const chrono::sys_time<_Duration>& __t) { 78 return chrono::file_time<_Duration>(__t.time_since_epoch()); 79 } 80 #endif // _LIBCPP_STD_VER >= 20 81 }; 82 _LIBCPP_END_NAMESPACE_FILESYSTEM 83 #endif // !_LIBCPP_CXX03_LANG 84 85 #endif // _LIBCPP___CHRONO_FILE_CLOCK_H 86