Bruno Rocha | be388f3 | 2011-08-02 12:40:17 -0700 | [diff] [blame] | 1 | // Copyright (c) 2011 The Chromium OS Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "timer.h" |
| 6 | |
| 7 | #include <string> |
| 8 | |
| 9 | #include <base/memory/scoped_ptr.h> |
| 10 | #include <base/time.h> |
| 11 | |
| 12 | #include "metrics_library.h" |
| 13 | |
| 14 | namespace chromeos_metrics { |
| 15 | |
| 16 | base::TimeTicks ClockWrapper::GetCurrentTime() const { |
| 17 | return base::TimeTicks::Now(); |
| 18 | } |
| 19 | |
| 20 | Timer::Timer() |
repo sync | 0672655 | 2013-05-28 14:19:53 -0700 | [diff] [blame^] | 21 | : timer_state_(kTimerStopped), |
Bruno Rocha | be388f3 | 2011-08-02 12:40:17 -0700 | [diff] [blame] | 22 | clock_wrapper_(new ClockWrapper()) {} |
| 23 | |
| 24 | bool Timer::Start() { |
repo sync | 0672655 | 2013-05-28 14:19:53 -0700 | [diff] [blame^] | 25 | elapsed_time_ = base::TimeDelta(); // Sets elapsed_time_ to zero. |
Bruno Rocha | be388f3 | 2011-08-02 12:40:17 -0700 | [diff] [blame] | 26 | start_time_ = clock_wrapper_->GetCurrentTime(); |
repo sync | 0672655 | 2013-05-28 14:19:53 -0700 | [diff] [blame^] | 27 | timer_state_ = kTimerRunning; |
Bruno Rocha | be388f3 | 2011-08-02 12:40:17 -0700 | [diff] [blame] | 28 | return true; |
| 29 | } |
| 30 | |
| 31 | bool Timer::Stop() { |
repo sync | 0672655 | 2013-05-28 14:19:53 -0700 | [diff] [blame^] | 32 | if (timer_state_ == kTimerStopped) |
| 33 | return false; |
| 34 | if (timer_state_ == kTimerRunning) |
| 35 | elapsed_time_ += clock_wrapper_->GetCurrentTime() - start_time_; |
| 36 | timer_state_ = kTimerStopped; |
Bruno Rocha | be388f3 | 2011-08-02 12:40:17 -0700 | [diff] [blame] | 37 | return true; |
| 38 | } |
| 39 | |
repo sync | 0672655 | 2013-05-28 14:19:53 -0700 | [diff] [blame^] | 40 | bool Timer::Pause() { |
| 41 | switch (timer_state_) { |
| 42 | case kTimerStopped: |
| 43 | if (!Start()) |
| 44 | return false; |
| 45 | timer_state_ = kTimerPaused; |
| 46 | return true; |
| 47 | case kTimerRunning: |
| 48 | timer_state_ = kTimerPaused; |
| 49 | elapsed_time_ += clock_wrapper_->GetCurrentTime() - start_time_; |
| 50 | return true; |
| 51 | default: |
| 52 | return false; |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | bool Timer::Resume() { |
| 57 | switch (timer_state_) { |
| 58 | case kTimerStopped: |
| 59 | return Start(); |
| 60 | case kTimerPaused: |
| 61 | start_time_ = clock_wrapper_->GetCurrentTime(); |
| 62 | timer_state_ = kTimerRunning; |
| 63 | return true; |
| 64 | default: |
| 65 | return false; |
| 66 | } |
| 67 | } |
| 68 | |
Bruno Rocha | be388f3 | 2011-08-02 12:40:17 -0700 | [diff] [blame] | 69 | bool Timer::Reset() { |
repo sync | 0672655 | 2013-05-28 14:19:53 -0700 | [diff] [blame^] | 70 | elapsed_time_ = base::TimeDelta(); // Sets elapsed_time_ to zero. |
| 71 | timer_state_ = kTimerStopped; |
Bruno Rocha | be388f3 | 2011-08-02 12:40:17 -0700 | [diff] [blame] | 72 | return true; |
| 73 | } |
| 74 | |
| 75 | bool Timer::HasStarted() const { |
repo sync | 0672655 | 2013-05-28 14:19:53 -0700 | [diff] [blame^] | 76 | return timer_state_ != kTimerStopped; |
Bruno Rocha | be388f3 | 2011-08-02 12:40:17 -0700 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | bool Timer::GetElapsedTime(base::TimeDelta* elapsed_time) const { |
repo sync | 0672655 | 2013-05-28 14:19:53 -0700 | [diff] [blame^] | 80 | if (start_time_.is_null() || !elapsed_time) |
| 81 | return false; |
| 82 | *elapsed_time = elapsed_time_; |
| 83 | if (timer_state_ == kTimerRunning) { |
| 84 | *elapsed_time += clock_wrapper_->GetCurrentTime() - start_time_; |
Bruno Rocha | be388f3 | 2011-08-02 12:40:17 -0700 | [diff] [blame] | 85 | } |
| 86 | return true; |
| 87 | } |
| 88 | |
| 89 | // static |
| 90 | MetricsLibraryInterface* TimerReporter::metrics_lib_ = NULL; |
| 91 | |
| 92 | TimerReporter::TimerReporter(const std::string& histogram_name, int min, |
| 93 | int max, int num_buckets) |
| 94 | : histogram_name_(histogram_name), |
| 95 | min_(min), |
| 96 | max_(max), |
| 97 | num_buckets_(num_buckets) {} |
| 98 | |
| 99 | bool TimerReporter::ReportMilliseconds() const { |
| 100 | base::TimeDelta elapsed_time; |
| 101 | if (!metrics_lib_ || !GetElapsedTime(&elapsed_time)) return false; |
| 102 | return metrics_lib_->SendToUMA(histogram_name_, |
| 103 | elapsed_time.InMilliseconds(), |
| 104 | min_, |
| 105 | max_, |
| 106 | num_buckets_); |
| 107 | } |
| 108 | |
| 109 | } // namespace chromeos_metrics |