56 lines
2.3 KiB
C
56 lines
2.3 KiB
C
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/*------------------------------------------------------------------------------*
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* Architecture & Implementation of DBMS *
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*------------------------------------------------------------------------------*
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* Copyright 2022 Databases and Information Systems Group TU Dortmund *
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* Visit us at *
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* http://dbis.cs.tu-dortmund.de/cms/en/home/ *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR 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 *
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR *
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, *
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR *
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* OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Authors: *
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* Maximilian Berens <maximilian.berens@tu-dortmund.de> *
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* Roland Kühn <roland.kuehn@cs.tu-dortmund.de> *
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* Jan Mühlig <jan.muehlig@tu-dortmund.de> *
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*------------------------------------------------------------------------------*
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*/
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#pragma once
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#include <chrono>
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#include <functional>
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namespace beedb::util
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{
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/**
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* Clock for time measurements while query execution.
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* The clock is started directly on creation.
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*/
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class Clock
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{
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public:
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Clock() : _start(std::chrono::steady_clock::now())
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{
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}
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~Clock() = default;
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/**
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* Stops the measurement.
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*
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* @return Measured time in milliseconds.
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*/
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[[nodiscard]] std::chrono::milliseconds end() const
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{
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const auto end = std::chrono::steady_clock::now();
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return std::chrono::duration_cast<std::chrono::milliseconds>(end - _start);
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}
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private:
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std::chrono::time_point<std::chrono::steady_clock> _start;
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};
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} // namespace beedb::util
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