| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CHROME_BROWSER_CHROMEOS_POWER_POWER_DATA_COLLECTOR_H_ |
| #define CHROME_BROWSER_CHROMEOS_POWER_POWER_DATA_COLLECTOR_H_ |
| |
| #include <deque> |
| |
| #include "base/basictypes.h" |
| #include "base/compiler_specific.h" |
| #include "base/time/time.h" |
| #include "chrome/browser/chromeos/power/cpu_data_collector.h" |
| #include "chromeos/chromeos_export.h" |
| #include "chromeos/dbus/power_manager_client.h" |
| |
| namespace power_manager { |
| class PowerSupplyProperties; |
| } |
| |
| namespace chromeos { |
| |
| // A class which starts collecting power metrics, like the battery charge, as |
| // soon as it is initialized via Initialize(). |
| // |
| // This class is implemented as a global singleton, initialized after |
| // DBusThreadManager which it depends on. |
| class CHROMEOS_EXPORT PowerDataCollector : public PowerManagerClient::Observer { |
| public: |
| struct PowerSupplySample { |
| PowerSupplySample(); |
| |
| // Time when the sample was captured. We use base::Time instead of |
| // base::TimeTicks because the latter does not advance when the system is |
| // suspended. |
| base::Time time; |
| |
| // True if connected to external power at the time of the sample. |
| bool external_power; |
| |
| // The battery charge as a percentage of full charge in range [0.0, 100.00]. |
| double battery_percent; |
| |
| // The battery discharge rate in W. Positive if the battery is being |
| // discharged and negative if it's being charged. |
| double battery_discharge_rate; |
| }; |
| |
| struct SystemResumedSample { |
| SystemResumedSample(); |
| |
| // Time when the system resumed. |
| base::Time time; |
| |
| // The duration for which the system was in sleep/suspend state. |
| base::TimeDelta sleep_duration; |
| }; |
| |
| const std::deque<PowerSupplySample>& power_supply_data() const { |
| return power_supply_data_; |
| } |
| |
| const std::deque<SystemResumedSample>& system_resumed_data() const { |
| return system_resumed_data_; |
| } |
| |
| const CpuDataCollector& cpu_data_collector() const { |
| return cpu_data_collector_; |
| } |
| |
| // Can be called only after DBusThreadManager is initialized. |
| static void Initialize(); |
| |
| // Same as Initialize, but does not start the CpuDataCollector. |
| static void InitializeForTesting(); |
| |
| // Can be called only if initialized via Initialize, and before |
| // DBusThreadManager is destroyed. |
| static void Shutdown(); |
| |
| // Returns the global instance of PowerDataCollector. |
| static PowerDataCollector* Get(); |
| |
| // PowerManagerClient::Observer implementation: |
| virtual void PowerChanged( |
| const power_manager::PowerSupplyProperties& prop) override; |
| virtual void SuspendDone(const base::TimeDelta& sleep_duration) override; |
| |
| // Only those power data samples which fall within the last |
| // |kSampleTimeLimitSec| are stored in memory. |
| static const int kSampleTimeLimitSec; |
| |
| private: |
| explicit PowerDataCollector(const bool start_cpu_data_collector); |
| |
| virtual ~PowerDataCollector(); |
| |
| std::deque<PowerSupplySample> power_supply_data_; |
| std::deque<SystemResumedSample> system_resumed_data_; |
| CpuDataCollector cpu_data_collector_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PowerDataCollector); |
| }; |
| |
| // Adds |sample| to |sample_deque|. |
| // It dumps samples |PowerDataCollector::kSampleTimeLimitSec| or more older than |
| // |sample|. |
| template <typename SampleType> |
| void AddSample(std::deque<SampleType>* sample_queue, const SampleType& sample) { |
| while (!sample_queue->empty()) { |
| const SampleType& first = sample_queue->front(); |
| if (sample.time - first.time > |
| base::TimeDelta::FromSeconds(PowerDataCollector::kSampleTimeLimitSec)) { |
| sample_queue->pop_front(); |
| } else { |
| break; |
| } |
| } |
| sample_queue->push_back(sample); |
| } |
| |
| } // namespace chromeos |
| |
| #endif // CHROME_BROWSER_CHROMEOS_POWER_POWER_DATA_COLLECTOR_H_ |