52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
/*
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* Copyright 2022 The Android Open Source Project
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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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#pragma once
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#include <base/strings/stringprintf.h>
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#include <chrono>
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#include <cstdint>
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#include <string>
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class Stopwatch {
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public:
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Stopwatch(std::string name)
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: name_(std::move(name)),
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start_(std::chrono::duration_cast<std::chrono::milliseconds>(
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std::chrono::system_clock::now().time_since_epoch())
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.count()) {}
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uint64_t LapMs() const {
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uint64_t now = std::chrono::duration_cast<std::chrono::milliseconds>(
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std::chrono::system_clock::now().time_since_epoch())
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.count();
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return now - start_;
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}
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std::string ToString() { return ToString(""); }
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std::string ToString(const std::string& comment) {
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return base::StringPrintf("%s: %lu ms %s", name_.c_str(),
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static_cast<unsigned long>(LapMs()),
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comment.c_str());
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}
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private:
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std::string name_;
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uint64_t start_;
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};
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