78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
/*
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* time.hpp
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2022 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MAKO_TIME_HPP
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#define MAKO_TIME_HPP
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#include <chrono>
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namespace mako {
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/* time measurement helpers */
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using std::chrono::steady_clock;
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using timepoint_t = decltype(steady_clock::now());
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using timediff_t = decltype(std::declval<timepoint_t>() - std::declval<timepoint_t>());
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template <typename Duration>
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double toDoubleSeconds(Duration duration) {
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return std::chrono::duration_cast<std::chrono::duration<double>>(duration).count();
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}
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template <typename Duration>
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uint64_t toIntegerSeconds(Duration duration) {
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return std::chrono::duration_cast<std::chrono::duration<uint64_t>>(duration).count();
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}
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template <typename Duration>
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uint64_t toIntegerMicroseconds(Duration duration) {
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return std::chrono::duration_cast<std::chrono::duration<uint64_t, std::micro>>(duration).count();
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}
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// timing helpers
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struct StartAtCtor {};
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class Stopwatch {
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timepoint_t p1, p2;
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public:
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Stopwatch() noexcept : p1(), p2() {}
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Stopwatch(StartAtCtor) noexcept { start(); }
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Stopwatch(timepoint_t start_time) noexcept : p1(start_time), p2() {}
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Stopwatch(const Stopwatch&) noexcept = default;
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Stopwatch& operator=(const Stopwatch&) noexcept = default;
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timepoint_t getStart() const noexcept { return p1; }
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timepoint_t getStop() const noexcept { return p2; }
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void start() noexcept { p1 = steady_clock::now(); }
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Stopwatch& stop() noexcept {
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p2 = steady_clock::now();
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return *this;
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}
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Stopwatch& setStop(timepoint_t p_stop) noexcept {
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p2 = p_stop;
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return *this;
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}
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void startFromStop() noexcept { p1 = p2; }
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auto diff() const noexcept { return p2 - p1; }
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};
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} // namespace mako
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#endif /* MAKO_TIME_HPP */
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