src/chrome/browser/chromeos/power/power_data_collector.cc

   1 // Copyright 2014 The Chromium 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 "chrome/browser/chromeos/power/power_data_collector.h"
   6
   7 #include "base/logging.h"
   8 #include "chromeos/dbus/dbus_thread_manager.h"
   9 #include "chromeos/dbus/power_manager/power_supply_properties.pb.h"
  10
  11 namespace chromeos {
  12
  13 namespace {
  14
  15 // The global PowerDataCollector instance.
  16 PowerDataCollector* g_power_data_collector = NULL;
  17
  18 }  // namespace
  19
  20 const int PowerDataCollector::kSampleTimeLimitSec = 24 * 60 * 60;
  21
  22 // static
  23 void PowerDataCollector::Initialize() {
  24   // Check that power data collector is initialized only after the
  25   // DBusThreadManager is initialized.
  26   CHECK(DBusThreadManager::Get());
  27   CHECK(g_power_data_collector == NULL);
  28   g_power_data_collector = new PowerDataCollector(true);
  29 }
  30
  31 void PowerDataCollector::InitializeForTesting() {
  32   CHECK(DBusThreadManager::Get());
  33   CHECK(g_power_data_collector == NULL);
  34   g_power_data_collector = new PowerDataCollector(false);
  35 }
  36
  37 // static
  38 void PowerDataCollector::Shutdown() {
  39   // Shutdown only if initialized.
  40   CHECK(g_power_data_collector);
  41   delete g_power_data_collector;
  42   g_power_data_collector = NULL;
  43 }
  44
  45 // static
  46 PowerDataCollector* PowerDataCollector::Get() {
  47   CHECK(g_power_data_collector);
  48   return g_power_data_collector;
  49 }
  50
  51 void PowerDataCollector::PowerChanged(
  52     const power_manager::PowerSupplyProperties& prop) {
  53   PowerSupplySample sample;
  54   sample.time = base::Time::Now();
  55   sample.external_power = (prop.external_power() !=
  56       power_manager::PowerSupplyProperties::DISCONNECTED);
  57   sample.battery_percent = prop.battery_percent();
  58   sample.battery_discharge_rate = prop.battery_discharge_rate();
  59   AddSample(&power_supply_data_, sample);
  60 }
  61
  62 void PowerDataCollector::SuspendDone(const base::TimeDelta& sleep_duration) {
  63   SystemResumedSample sample;
  64   sample.time = base::Time::Now();
  65   sample.sleep_duration = sleep_duration;
  66   AddSample(&system_resumed_data_, sample);
  67 }
  68
  69 PowerDataCollector::PowerDataCollector(const bool start_cpu_data_collector) {
  70   DBusThreadManager::Get()->GetPowerManagerClient()->AddObserver(this);
  71   if (start_cpu_data_collector)
  72     cpu_data_collector_.Start();
  73 }
  74
  75 PowerDataCollector::~PowerDataCollector() {
  76   DBusThreadManager* dbus_manager = DBusThreadManager::Get();
  77   CHECK(dbus_manager);
  78   dbus_manager->GetPowerManagerClient()->RemoveObserver(this);
  79 }
  80
  81 PowerDataCollector::PowerSupplySample::PowerSupplySample()
  82     : external_power(false),
  83       battery_percent(0.0),
  84       battery_discharge_rate(0.0) {
  85 }
  86
  87 PowerDataCollector::SystemResumedSample::SystemResumedSample() {
  88 }
  89
  90 }  // namespace chromeos