1*06c3fb27SDimitry Andric //===----------------------------------------------------------------------===// 2*06c3fb27SDimitry Andric // 3*06c3fb27SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*06c3fb27SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*06c3fb27SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*06c3fb27SDimitry Andric // 7*06c3fb27SDimitry Andric //===----------------------------------------------------------------------===// 8*06c3fb27SDimitry Andric 9*06c3fb27SDimitry Andric #include <__config> 10*06c3fb27SDimitry Andric #include <chrono> 11*06c3fb27SDimitry Andric #include <filesystem> 12*06c3fb27SDimitry Andric #include <time.h> 13*06c3fb27SDimitry Andric 14*06c3fb27SDimitry Andric #if defined(_LIBCPP_WIN32API) 15*06c3fb27SDimitry Andric # include "time_utils.h" 16*06c3fb27SDimitry Andric #endif 17*06c3fb27SDimitry Andric 18*06c3fb27SDimitry Andric #if defined(_LIBCPP_WIN32API) 19*06c3fb27SDimitry Andric # define WIN32_LEAN_AND_MEAN 20*06c3fb27SDimitry Andric # define NOMINMAX 21*06c3fb27SDimitry Andric # include <windows.h> 22*06c3fb27SDimitry Andric #endif 23*06c3fb27SDimitry Andric 24*06c3fb27SDimitry Andric #if __has_include(<unistd.h>) 25*06c3fb27SDimitry Andric # include <unistd.h> // _POSIX_TIMERS 26*06c3fb27SDimitry Andric #endif 27*06c3fb27SDimitry Andric 28*06c3fb27SDimitry Andric #if __has_include(<sys/time.h>) 29*06c3fb27SDimitry Andric # include <sys/time.h> // for gettimeofday and timeval 30*06c3fb27SDimitry Andric #endif 31*06c3fb27SDimitry Andric 32*06c3fb27SDimitry Andric #if defined(__APPLE__) || (defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0) 33*06c3fb27SDimitry Andric # define _LIBCPP_HAS_CLOCK_GETTIME 34*06c3fb27SDimitry Andric #endif 35*06c3fb27SDimitry Andric 36*06c3fb27SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM 37*06c3fb27SDimitry Andric 38*06c3fb27SDimitry Andric const bool _FilesystemClock::is_steady; 39*06c3fb27SDimitry Andric 40*06c3fb27SDimitry Andric _FilesystemClock::time_point _FilesystemClock::now() noexcept { 41*06c3fb27SDimitry Andric typedef chrono::duration<rep> __secs; 42*06c3fb27SDimitry Andric #if defined(_LIBCPP_WIN32API) 43*06c3fb27SDimitry Andric typedef chrono::duration<rep, nano> __nsecs; 44*06c3fb27SDimitry Andric FILETIME time; 45*06c3fb27SDimitry Andric GetSystemTimeAsFileTime(&time); 46*06c3fb27SDimitry Andric detail::TimeSpec tp = detail::filetime_to_timespec(time); 47*06c3fb27SDimitry Andric return time_point(__secs(tp.tv_sec) + 48*06c3fb27SDimitry Andric chrono::duration_cast<duration>(__nsecs(tp.tv_nsec))); 49*06c3fb27SDimitry Andric #elif defined(_LIBCPP_HAS_CLOCK_GETTIME) 50*06c3fb27SDimitry Andric typedef chrono::duration<rep, nano> __nsecs; 51*06c3fb27SDimitry Andric struct timespec tp; 52*06c3fb27SDimitry Andric if (0 != clock_gettime(CLOCK_REALTIME, &tp)) 53*06c3fb27SDimitry Andric __throw_system_error(errno, "clock_gettime(CLOCK_REALTIME) failed"); 54*06c3fb27SDimitry Andric return time_point(__secs(tp.tv_sec) + 55*06c3fb27SDimitry Andric chrono::duration_cast<duration>(__nsecs(tp.tv_nsec))); 56*06c3fb27SDimitry Andric #else 57*06c3fb27SDimitry Andric typedef chrono::duration<rep, micro> __microsecs; 58*06c3fb27SDimitry Andric timeval tv; 59*06c3fb27SDimitry Andric gettimeofday(&tv, 0); 60*06c3fb27SDimitry Andric return time_point(__secs(tv.tv_sec) + __microsecs(tv.tv_usec)); 61*06c3fb27SDimitry Andric #endif 62*06c3fb27SDimitry Andric } 63*06c3fb27SDimitry Andric 64*06c3fb27SDimitry Andric _LIBCPP_END_NAMESPACE_FILESYSTEM 65