| // Copyright 2013 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 BASE_POWER_MONITOR_POWER_MONITOR_DEVICE_SOURCE_H_ |
| #define BASE_POWER_MONITOR_POWER_MONITOR_DEVICE_SOURCE_H_ |
| |
| #include "base/base_export.h" |
| #include "base/basictypes.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/observer_list_threadsafe.h" |
| #include "base/power_monitor/power_monitor_source.h" |
| #include "base/power_monitor/power_observer.h" |
| |
| #if defined(OS_WIN) |
| #include <windows.h> |
| |
| // Windows HiRes timers drain the battery faster so we need to know the battery |
| // status. This isn't true for other platforms. |
| #define ENABLE_BATTERY_MONITORING 1 |
| #else |
| #undef ENABLE_BATTERY_MONITORING |
| #endif // !OS_WIN |
| |
| #if defined(ENABLE_BATTERY_MONITORING) |
| #include "base/timer/timer.h" |
| #endif // defined(ENABLE_BATTERY_MONITORING) |
| |
| #if defined(OS_IOS) |
| #include <objc/runtime.h> |
| #endif // OS_IOS |
| |
| namespace base { |
| |
| // A class used to monitor the power state change and notify the observers about |
| // the change event. |
| class BASE_EXPORT PowerMonitorDeviceSource : public PowerMonitorSource { |
| public: |
| PowerMonitorDeviceSource(); |
| virtual ~PowerMonitorDeviceSource(); |
| |
| #if defined(OS_MACOSX) |
| // Allocate system resources needed by the PowerMonitor class. |
| // |
| // This function must be called before instantiating an instance of the class |
| // and before the Sandbox is initialized. |
| #if !defined(OS_IOS) |
| static void AllocateSystemIOPorts(); |
| #else |
| static void AllocateSystemIOPorts() {} |
| #endif // OS_IOS |
| #endif // OS_MACOSX |
| |
| private: |
| #if defined(OS_WIN) |
| // Represents a message-only window for power message handling on Windows. |
| // Only allow PowerMonitor to create it. |
| class PowerMessageWindow { |
| public: |
| PowerMessageWindow(); |
| ~PowerMessageWindow(); |
| |
| private: |
| static LRESULT CALLBACK WndProcThunk(HWND hwnd, |
| UINT message, |
| WPARAM wparam, |
| LPARAM lparam); |
| // Instance of the module containing the window procedure. |
| HMODULE instance_; |
| // A hidden message-only window. |
| HWND message_hwnd_; |
| }; |
| #endif // OS_WIN |
| |
| #if defined(OS_MACOSX) |
| void PlatformInit(); |
| void PlatformDestroy(); |
| #endif |
| |
| // Platform-specific method to check whether the system is currently |
| // running on battery power. Returns true if running on batteries, |
| // false otherwise. |
| virtual bool IsOnBatteryPowerImpl() OVERRIDE; |
| |
| // Checks the battery status and notifies observers if the battery |
| // status has changed. |
| void BatteryCheck(); |
| |
| #if defined(OS_IOS) |
| // Holds pointers to system event notification observers. |
| std::vector<id> notification_observers_; |
| #endif |
| |
| #if defined(ENABLE_BATTERY_MONITORING) |
| base::OneShotTimer<PowerMonitorDeviceSource> delayed_battery_check_; |
| #endif |
| |
| #if defined(OS_WIN) |
| PowerMessageWindow power_message_window_; |
| #endif |
| |
| DISALLOW_COPY_AND_ASSIGN(PowerMonitorDeviceSource); |
| }; |
| |
| } // namespace base |
| |
| #endif // BASE_POWER_MONITOR_POWER_MONITOR_DEVICE_SOURCE_H_ |