////////////////////////////////////////////////////////////////////////////////////////// // A multi-platform support c++11 library with focus on asynchronous socket I/O for any // client application. ////////////////////////////////////////////////////////////////////////////////////////// /* The MIT License (MIT) Copyright (c) 2012-2021 HALX99 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef YASIO__UTILS_HPP #define YASIO__UTILS_HPP #include <assert.h> #include <chrono> #include <algorithm> #include "yasio/compiler/feature_test.hpp" namespace yasio { // typedefs typedef long long highp_time_t; typedef std::chrono::high_resolution_clock steady_clock_t; typedef std::chrono::system_clock system_clock_t; // The high precision nano seconds timestamp since epoch template <typename _Ty = steady_clock_t> inline highp_time_t xhighp_clock() { auto duration = _Ty::now().time_since_epoch(); return std::chrono::duration_cast<std::chrono::nanoseconds>(duration).count(); } // The high precision micro seconds timestamp since epoch template <typename _Ty = steady_clock_t> inline highp_time_t highp_clock() { return xhighp_clock<_Ty>() / std::milli::den; } // The normal precision milli seconds timestamp since epoch template <typename _Ty = steady_clock_t> inline highp_time_t clock() { return xhighp_clock<_Ty>() / std::micro::den; } // The time now in seconds since epoch, better performance than chrono on win32 // see: win10 sdk ucrt/time/time.cpp:common_time // https://docs.microsoft.com/en-us/windows/desktop/sysinfo/acquiring-high-resolution-time-stamps inline highp_time_t time_now() { return ::time(nullptr); } #if YASIO__HAS_CXX17 using std::clamp; #else template <typename _Ty> const _Ty& clamp(const _Ty& v, const _Ty& lo, const _Ty& hi) { assert(!(hi < lo)); return v < lo ? lo : hi < v ? hi : v; } #endif template <typename _Ty> inline void invoke_dtor(_Ty* p) { p->~_Ty(); } } // namespace yasio #endif