mirror of
https://github.com/tesseract-ocr/tesseract.git
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65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
// (C) Copyright 2017, Google Inc.
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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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// http://www.apache.org/licenses/LICENSE-2.0
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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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// Portability include to match the Google test environment.
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#ifndef TESSERACT_UNITTEST_CYCLETIMER_H
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#define TESSERACT_UNITTEST_CYCLETIMER_H
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#include <chrono> // for std::chrono
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// See https://github.com/google/or-tools/blob/master/ortools/base/timer.h
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class CycleTimer {
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private:
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static int64_t now() {
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return std::chrono::duration_cast<std::chrono::milliseconds>(
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std::chrono::steady_clock::now().time_since_epoch()).count();
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}
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public:
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CycleTimer() {
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Reset();
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}
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void Reset() {
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running_ = false;
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sum_ = 0;
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start_ = 0;
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}
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// When Start() is called multiple times, only the most recent is used.
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void Start() {
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running_ = true;
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start_ = now();
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}
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void Restart() {
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sum_ = 0;
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Start();
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}
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void Stop() {
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if (running_) {
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sum_ += now() - start_;
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running_ = false;
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}
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}
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int64_t GetInMs() const {
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return running_ ? now() - start_ + sum_ : sum_;
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}
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private:
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bool running_;
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int64_t start_;
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int64_t sum_;
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};
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#endif // TESSERACT_UNITTEST_CYCLETIMER_H
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