Android Power Management, partial wake lock parts

Android 當在 running mode 按第一次 Power 鍵，關螢幕後，Linux kernel 應該是在
 early_suspend mode，因此如果跟第一次間隔很短(幾秒?)馬上按第二次 Power 鍵
 resume 是直接回到關螢幕前的應用程式 intent。

但是如果第二次間隔跟第一次間隔時間，差距到讓 Linux kernel 進入 suspend mode，則
resume 時會看到 Launcher 的螢幕鎖頭。

而卡在 early_suspend 會不會進入 suspend mode，則跟 Android 層是否有要 partial wake lock
有關。

目前已知有取得 partial wake lock 的服務(原來有這麼多 XD)：
Android eclair-release branch

同步也會卡...

frameworks/base/core/java/android/content/SyncManager.java

正在關機
frameworks/base/core/java/com/android/internal/app/ShutdownThread.java

SD 卡格式化
frameworks/base/core/java/com/android/internal/os/storage/ExternalStorageFormatter.java

使用者互動
frameworks/base/libs/ui/EventHub.cpp

frameworks/base/services/java/com/android/server/WindowManagerService.java

frameworks/base/services/java/com/android/server/NotificationPlayer.java

鬧鐘

frameworks/base/services/java/com/android/server/AlarmManagerService.java

frameworks/base/media/java/android/media/AsyncPlayer.java

使用電話功能

frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

frameworks/base/telephony/java/com/android/internal/telephony/RIL.java

frameworks/base/telephony/java/com/android/internal/telephony/cdma/CdmaServiceStateTracker.java

frameworks/base/telephony/java/com/android/internal/telephony/cdma/CDMAPhone.java

frameworks/base/telephony/java/com/android/internal/telephony/cdma/CdmaConnection.java

frameworks/base/telephony/java/com/android/internal/telephony/gsm/GsmConnection.java

frameworks/base/telephony/java/com/android/internal/telephony/gsm/GsmServiceStateTracker.java

RIL HAL driver 

hardware/ril/libril/ril.cpp

frameworks/base/voip/java/com/android/server/sip/SipWakeLock.java

簡訊

frameworks/base/telephony/java/com/android/internal/telephony/SMSDispatcher.java

螢幕鎖

frameworks/base/policy/src/com/android/internal/policy/impl/KeyguardViewMediator.java

開啟 GPS 定位服務

frameworks/base/services/jni/com_android_server_location_GpsLocationProvider.cpp

frameworks/base/services/java/com/android/server/LocationManagerService.java

frameworks/base/services/java/com/android/server/location/GpsLocationProvider.java

聽音樂

frameworks/base/services/audioflinger/AudioPolicyService.cpp

藍芽耳機
frameworks/base/core/java/android/bluetooth/HeadsetBase.java
frameworks/base/core/java/android/bluetooth/ScoSocket.java

(有線?)耳機

frameworks/base/services/java/com/android/server/HeadsetObserver.java

frameworks/base/services/java/com/android/server/DevicePolicyManagerService.java

震動也會鎖

frameworks/base/services/java/com/android/server/VibratorService.java

開 Wifi 會鎖

frameworks/base/services/java/com/android/server/WifiService.java

frameworks/base/wifi/java/android/net/wifi/WifiStateTracker.java

備份??

frameworks/base/services/java/com/android/server/BackupManagerService.java

??

frameworks/base/services/java/com/android/server/am/ActivityStack.java

??

frameworks/base/tests/BatteryWaster/src/com/android/batterywaster/BatteryWaster.java

實作的檔案如下：

frameworks/base/core/java/android/os/Power.java
frameworks/base/core/java/android/os/PowerManager.java
frameworks/base/services/java/com/android/server/PowerManagerService.java

JNI 介接層：
frameworks/base/core/jni/android_os_Power.cpp
hardware/libhardware_legacy/include/hardware_legacy/power.h
hardware/libhardware_legacy/power/power.c