mirror of
https://github.com/SimoneN64/Kaizen.git
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131 lines
2.8 KiB
C++
131 lines
2.8 KiB
C++
/* Copyright (c) 2017-2023 Hans-Kristian Arntzen
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "timer.hpp"
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#ifdef _WIN32
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#else
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#include <time.h>
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#endif
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namespace Util
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{
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FrameTimer::FrameTimer()
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{
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reset();
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}
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void FrameTimer::reset()
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{
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start = get_time();
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last = start;
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last_period = 0;
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}
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void FrameTimer::enter_idle()
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{
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idle_start = get_time();
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}
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void FrameTimer::leave_idle()
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{
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auto idle_end = get_time();
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idle_time += idle_end - idle_start;
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}
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double FrameTimer::get_frame_time() const
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{
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return double(last_period) * 1e-9;
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}
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double FrameTimer::frame()
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{
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auto new_time = get_time() - idle_time;
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last_period = new_time - last;
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last = new_time;
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return double(last_period) * 1e-9;
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}
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double FrameTimer::frame(double frame_time)
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{
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last_period = int64_t(frame_time * 1e9);
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last += last_period;
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return frame_time;
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}
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double FrameTimer::get_elapsed() const
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{
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return double(last - start) * 1e-9;
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}
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int64_t FrameTimer::get_time()
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{
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return get_current_time_nsecs();
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}
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#ifdef _WIN32
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struct QPCFreq
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{
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QPCFreq()
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{
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LARGE_INTEGER freq;
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QueryPerformanceFrequency(&freq);
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inv_freq = 1e9 / double(freq.QuadPart);
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}
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double inv_freq;
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} static static_qpc_freq;
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#endif
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int64_t get_current_time_nsecs()
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{
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#ifdef _WIN32
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LARGE_INTEGER li;
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if (!QueryPerformanceCounter(&li))
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return 0;
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return int64_t(double(li.QuadPart) * static_qpc_freq.inv_freq);
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#else
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struct timespec ts = {};
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#if defined(ANDROID) || defined(__FreeBSD__)
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constexpr auto timebase = CLOCK_MONOTONIC;
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#else
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constexpr auto timebase = CLOCK_MONOTONIC_RAW;
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#endif
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if (clock_gettime(timebase, &ts) < 0)
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return 0;
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return ts.tv_sec * 1000000000ll + ts.tv_nsec;
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#endif
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}
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void Timer::start()
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{
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t = get_current_time_nsecs();
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}
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double Timer::end()
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{
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auto nt = get_current_time_nsecs();
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return double(nt - t) * 1e-9;
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}
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}
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