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() |
| 21 | : is_started_(false), |
| 22 | clock_wrapper_(new ClockWrapper()) {} |
| 23 | |
| 24 | bool Timer::Start() { |
| 25 | start_time_ = clock_wrapper_->GetCurrentTime(); |
| 26 | is_started_ = true; |
| 27 | return true; |
| 28 | } |
| 29 | |
| 30 | bool Timer::Stop() { |
| 31 | // Check if the timer has been started. |
| 32 | if (!is_started_) return false; |
| 33 | is_started_ = false; |
| 34 | elapsed_time_ = clock_wrapper_->GetCurrentTime() - start_time_; |
| 35 | return true; |
| 36 | } |
| 37 | |
| 38 | bool Timer::Reset() { |
| 39 | is_started_ = false; |
| 40 | return true; |
| 41 | } |
| 42 | |
| 43 | bool Timer::HasStarted() const { |
| 44 | return is_started_; |
| 45 | } |
| 46 | |
| 47 | bool Timer::GetElapsedTime(base::TimeDelta* elapsed_time) const { |
| 48 | if (start_time_.is_null() || !elapsed_time) return false; |
| 49 | if (is_started_) { |
| 50 | *elapsed_time = clock_wrapper_->GetCurrentTime() - start_time_; |
| 51 | } else { |
| 52 | *elapsed_time = elapsed_time_; |
| 53 | } |
| 54 | return true; |
| 55 | } |
| 56 | |
| 57 | // static |
| 58 | MetricsLibraryInterface* TimerReporter::metrics_lib_ = NULL; |
| 59 | |
| 60 | TimerReporter::TimerReporter(const std::string& histogram_name, int min, |
| 61 | int max, int num_buckets) |
| 62 | : histogram_name_(histogram_name), |
| 63 | min_(min), |
| 64 | max_(max), |
| 65 | num_buckets_(num_buckets) {} |
| 66 | |
| 67 | bool TimerReporter::ReportMilliseconds() const { |
| 68 | base::TimeDelta elapsed_time; |
| 69 | if (!metrics_lib_ || !GetElapsedTime(&elapsed_time)) return false; |
| 70 | return metrics_lib_->SendToUMA(histogram_name_, |
| 71 | elapsed_time.InMilliseconds(), |
| 72 | min_, |
| 73 | max_, |
| 74 | num_buckets_); |
| 75 | } |
| 76 | |
| 77 | } // namespace chromeos_metrics |