121 lines
3.2 KiB
C++
121 lines
3.2 KiB
C++
/*
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* Copyright (C) 2015 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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#include "metrics/timer.h"
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#include <string>
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#include <base/memory/scoped_ptr.h>
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#include "metrics/metrics_library.h"
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namespace chromeos_metrics {
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base::TimeTicks ClockWrapper::GetCurrentTime() const {
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return base::TimeTicks::Now();
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}
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Timer::Timer()
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: timer_state_(kTimerStopped),
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clock_wrapper_(new ClockWrapper()) {}
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bool Timer::Start() {
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elapsed_time_ = base::TimeDelta(); // Sets elapsed_time_ to zero.
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start_time_ = clock_wrapper_->GetCurrentTime();
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timer_state_ = kTimerRunning;
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return true;
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}
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bool Timer::Stop() {
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if (timer_state_ == kTimerStopped)
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return false;
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if (timer_state_ == kTimerRunning)
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elapsed_time_ += clock_wrapper_->GetCurrentTime() - start_time_;
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timer_state_ = kTimerStopped;
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return true;
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}
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bool Timer::Pause() {
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switch (timer_state_) {
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case kTimerStopped:
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if (!Start())
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return false;
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timer_state_ = kTimerPaused;
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return true;
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case kTimerRunning:
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timer_state_ = kTimerPaused;
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elapsed_time_ += clock_wrapper_->GetCurrentTime() - start_time_;
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return true;
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default:
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return false;
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}
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}
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bool Timer::Resume() {
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switch (timer_state_) {
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case kTimerStopped:
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return Start();
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case kTimerPaused:
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start_time_ = clock_wrapper_->GetCurrentTime();
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timer_state_ = kTimerRunning;
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return true;
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default:
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return false;
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}
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}
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bool Timer::Reset() {
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elapsed_time_ = base::TimeDelta(); // Sets elapsed_time_ to zero.
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timer_state_ = kTimerStopped;
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return true;
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}
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bool Timer::HasStarted() const {
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return timer_state_ != kTimerStopped;
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}
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bool Timer::GetElapsedTime(base::TimeDelta* elapsed_time) const {
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if (start_time_.is_null() || !elapsed_time)
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return false;
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*elapsed_time = elapsed_time_;
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if (timer_state_ == kTimerRunning) {
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*elapsed_time += clock_wrapper_->GetCurrentTime() - start_time_;
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}
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return true;
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}
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// static
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MetricsLibraryInterface* TimerReporter::metrics_lib_ = nullptr;
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TimerReporter::TimerReporter(const std::string& histogram_name, int min,
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int max, int num_buckets)
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: histogram_name_(histogram_name),
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min_(min),
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max_(max),
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num_buckets_(num_buckets) {}
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bool TimerReporter::ReportMilliseconds() const {
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base::TimeDelta elapsed_time;
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if (!metrics_lib_ || !GetElapsedTime(&elapsed_time)) return false;
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return metrics_lib_->SendToUMA(histogram_name_,
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elapsed_time.InMilliseconds(),
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min_,
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max_,
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num_buckets_);
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}
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} // namespace chromeos_metrics
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