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84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
/*
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Copyright (c) 2018-2019, tevador <tevador@gmail.com>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <chrono>
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#include <cstdint>
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class Stopwatch {
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public:
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Stopwatch(bool startNow = false) {
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reset();
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if (startNow) {
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start();
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}
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}
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void reset() {
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isRunning = false;
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elapsed = 0;
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}
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void start() {
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if (!isRunning) {
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startMark = std::chrono::high_resolution_clock::now();
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isRunning = true;
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}
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}
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void restart() {
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startMark = std::chrono::high_resolution_clock::now();
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isRunning = true;
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elapsed = 0;
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}
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void stop() {
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if (isRunning) {
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chrono_t endMark = std::chrono::high_resolution_clock::now();
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uint64_t ns = std::chrono::duration_cast<sw_unit>(endMark - startMark).count();
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elapsed += ns;
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isRunning = false;
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}
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}
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double getElapsed() const {
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return getElapsedNanosec() / 1e+9;
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}
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private:
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using chrono_t = std::chrono::high_resolution_clock::time_point;
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using sw_unit = std::chrono::nanoseconds;
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chrono_t startMark;
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uint64_t elapsed;
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bool isRunning;
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uint64_t getElapsedNanosec() const {
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uint64_t elns = elapsed;
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if (isRunning) {
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chrono_t endMark = std::chrono::high_resolution_clock::now();
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uint64_t ns = std::chrono::duration_cast<sw_unit>(endMark - startMark).count();
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elns += ns;
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}
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return elns;
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}
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}; |