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