72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
/*
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* Created by Joachim on 16/04/2019.
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* Adapted from donated nonius code.
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*
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* Distributed under the Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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// User-facing chronometer
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#ifndef TWOBLUECUBES_CATCH_CHRONOMETER_HPP_INCLUDED
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#define TWOBLUECUBES_CATCH_CHRONOMETER_HPP_INCLUDED
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#include "catch_clock.hpp"
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#include "catch_optimizer.hpp"
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#include "detail/catch_complete_invoke.hpp"
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#include "../catch_meta.hpp"
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namespace Catch {
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namespace Benchmark {
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namespace Detail {
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struct ChronometerConcept {
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virtual void start() = 0;
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virtual void finish() = 0;
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virtual ~ChronometerConcept() = default;
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};
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template <typename Clock>
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struct ChronometerModel final : public ChronometerConcept {
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void start() override { started = Clock::now(); }
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void finish() override { finished = Clock::now(); }
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ClockDuration<Clock> elapsed() const { return finished - started; }
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TimePoint<Clock> started;
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TimePoint<Clock> finished;
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};
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} // namespace Detail
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struct Chronometer {
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public:
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template <typename Fun>
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void measure(Fun&& fun) { measure(std::forward<Fun>(fun), is_callable<Fun(int)>()); }
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int runs() const { return k; }
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Chronometer(Detail::ChronometerConcept& meter, int k)
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: impl(&meter)
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, k(k) {}
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private:
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template <typename Fun>
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void measure(Fun&& fun, std::false_type) {
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measure([&fun](int) { return fun(); }, std::true_type());
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}
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template <typename Fun>
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void measure(Fun&& fun, std::true_type) {
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Detail::optimizer_barrier();
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impl->start();
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for (int i = 0; i < k; ++i) invoke_deoptimized(fun, i);
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impl->finish();
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Detail::optimizer_barrier();
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}
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Detail::ChronometerConcept* impl;
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int k;
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};
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} // namespace Benchmark
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} // namespace Catch
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#endif // TWOBLUECUBES_CATCH_CHRONOMETER_HPP_INCLUDED
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