device/battery/battery_status_manager.h

   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 #ifndef DEVICE_BATTERY_BATTERY_STATUS_MANAGER_H_
   6 #define DEVICE_BATTERY_BATTERY_STATUS_MANAGER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "device/battery/battery_status_service.h"
  10
  11 namespace device {
  12
  13 // Platform specific manager class for fetching battery status data.
  14 class BatteryStatusManager {
  15  public:
  16   // Creates a BatteryStatusManager object. |callback| should be called when the
  17   // battery status changes.
  18   static scoped_ptr<BatteryStatusManager> Create(
  19       const BatteryStatusService::BatteryUpdateCallback& callback);
  20
  21   virtual ~BatteryStatusManager() {}
  22
  23   // Start listening for battery status changes. New updates are signalled
  24   // by invoking the callback provided at construction time.
  25   // Note that this is called in the IO thread.
  26   virtual bool StartListeningBatteryChange() = 0;
  27
  28   // Stop listening for battery status changes.
  29   // Note that this is called in the IO thread.
  30   virtual void StopListeningBatteryChange() = 0;
  31 };
  32
  33 }  // namespace device
  34
  35 #endif  // DEVICE_BATTERY_BATTERY_STATUS_MANAGER_H_