/* * Copyright (C) 2012 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.server.power; import android.app.ActivityManagerInternal; import android.app.AppOpsManager; import com.android.internal.app.IAppOpsService; import com.android.internal.app.IBatteryStats; import com.android.server.EventLogTags; import com.android.server.LocalServices; import android.app.ActivityManagerNative; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.hardware.input.InputManagerInternal; import android.media.AudioManager; import android.media.Ringtone; import android.media.RingtoneManager; import android.net.Uri; import android.os.BatteryStats; import android.os.Handler; import android.os.Looper; import android.os.Message; import android.os.PowerManager; import android.os.RemoteException; import android.os.SystemClock; import android.os.UserHandle; import android.os.WorkSource; import android.provider.Settings; import android.util.EventLog; import android.util.Slog; import android.view.WindowManagerPolicy; /** * Sends broadcasts about important power state changes. *

* This methods of this class may be called by the power manager service while * its lock is being held. Internally it takes care of sending broadcasts to * notify other components of the system or applications asynchronously. *

* The notifier is designed to collapse unnecessary broadcasts when it is not * possible for the system to have observed an intermediate state. *

* For example, if the device wakes up, goes to sleep, wakes up again and goes to * sleep again before the wake up notification is sent, then the system will * be told about only one wake up and sleep. However, we always notify the * fact that at least one transition occurred. It is especially important to * tell the system when we go to sleep so that it can lock the keyguard if needed. *

*/ final class Notifier { private static final String TAG = "PowerManagerNotifier"; private static final boolean DEBUG = false; private static final int POWER_STATE_UNKNOWN = 0; private static final int POWER_STATE_AWAKE = 1; private static final int POWER_STATE_ASLEEP = 2; private static final int MSG_USER_ACTIVITY = 1; private static final int MSG_BROADCAST = 2; private static final int MSG_WIRELESS_CHARGING_STARTED = 3; private final Object mLock = new Object(); private final Context mContext; private final IBatteryStats mBatteryStats; private final IAppOpsService mAppOps; private final SuspendBlocker mSuspendBlocker; private final ScreenOnBlocker mScreenOnBlocker; private final WindowManagerPolicy mPolicy; private final ActivityManagerInternal mActivityManagerInternal; private final InputManagerInternal mInputManagerInternal; private final NotifierHandler mHandler; private final Intent mScreenOnIntent; private final Intent mScreenOffIntent; // The current power state. private int mActualPowerState; private int mLastGoToSleepReason; // True if there is a pending transition that needs to be reported. private boolean mPendingWakeUpBroadcast; private boolean mPendingGoToSleepBroadcast; // The currently broadcasted power state. This reflects what other parts of the // system have observed. private int mBroadcastedPowerState; private boolean mBroadcastInProgress; private long mBroadcastStartTime; // True if a user activity message should be sent. private boolean mUserActivityPending; // True if the screen on blocker has been acquired. private boolean mScreenOnBlockerAcquired; public Notifier(Looper looper, Context context, IBatteryStats batteryStats, IAppOpsService appOps, SuspendBlocker suspendBlocker, ScreenOnBlocker screenOnBlocker, WindowManagerPolicy policy) { mContext = context; mBatteryStats = batteryStats; mAppOps = appOps; mSuspendBlocker = suspendBlocker; mScreenOnBlocker = screenOnBlocker; mPolicy = policy; mActivityManagerInternal = LocalServices.getService(ActivityManagerInternal.class); mInputManagerInternal = LocalServices.getService(InputManagerInternal.class); mHandler = new NotifierHandler(looper); mScreenOnIntent = new Intent(Intent.ACTION_SCREEN_ON); mScreenOnIntent.addFlags( Intent.FLAG_RECEIVER_REGISTERED_ONLY | Intent.FLAG_RECEIVER_FOREGROUND); mScreenOffIntent = new Intent(Intent.ACTION_SCREEN_OFF); mScreenOffIntent.addFlags( Intent.FLAG_RECEIVER_REGISTERED_ONLY | Intent.FLAG_RECEIVER_FOREGROUND); // Initialize interactive state for battery stats. try { mBatteryStats.noteInteractive(true); } catch (RemoteException ex) { } } /** * Called when a wake lock is acquired. */ public void onWakeLockAcquired(int flags, String tag, String packageName, int ownerUid, int ownerPid, WorkSource workSource) { if (DEBUG) { Slog.d(TAG, "onWakeLockAcquired: flags=" + flags + ", tag=\"" + tag + "\", packageName=" + packageName + ", ownerUid=" + ownerUid + ", ownerPid=" + ownerPid + ", workSource=" + workSource); } try { final int monitorType = getBatteryStatsWakeLockMonitorType(flags); if (workSource != null) { mBatteryStats.noteStartWakelockFromSource(workSource, ownerPid, tag, monitorType); } else { mBatteryStats.noteStartWakelock(ownerUid, ownerPid, tag, monitorType); // XXX need to deal with disabled operations. mAppOps.startOperation(AppOpsManager.getToken(mAppOps), AppOpsManager.OP_WAKE_LOCK, ownerUid, packageName); } } catch (RemoteException ex) { // Ignore } } /** * Called when a wake lock is released. */ public void onWakeLockReleased(int flags, String tag, String packageName, int ownerUid, int ownerPid, WorkSource workSource) { if (DEBUG) { Slog.d(TAG, "onWakeLockReleased: flags=" + flags + ", tag=\"" + tag + "\", packageName=" + packageName + ", ownerUid=" + ownerUid + ", ownerPid=" + ownerPid + ", workSource=" + workSource); } try { final int monitorType = getBatteryStatsWakeLockMonitorType(flags); if (workSource != null) { mBatteryStats.noteStopWakelockFromSource(workSource, ownerPid, tag, monitorType); } else { mBatteryStats.noteStopWakelock(ownerUid, ownerPid, tag, monitorType); mAppOps.finishOperation(AppOpsManager.getToken(mAppOps), AppOpsManager.OP_WAKE_LOCK, ownerUid, packageName); } } catch (RemoteException ex) { // Ignore } } private static int getBatteryStatsWakeLockMonitorType(int flags) { switch (flags & PowerManager.WAKE_LOCK_LEVEL_MASK) { case PowerManager.PARTIAL_WAKE_LOCK: case PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK: return BatteryStats.WAKE_TYPE_PARTIAL; default: return BatteryStats.WAKE_TYPE_FULL; } } /** * Notifies that the device is changing interactive state. */ public void onInteractiveStateChangeStarted(boolean interactive, int reason) { if (DEBUG) { Slog.d(TAG, "onInteractiveChangeStarted: interactive=" + interactive + ", reason=" + reason); } synchronized (mLock) { if (interactive) { // Waking up... if (mActualPowerState != POWER_STATE_AWAKE) { mActualPowerState = POWER_STATE_AWAKE; mPendingWakeUpBroadcast = true; if (!mScreenOnBlockerAcquired) { mScreenOnBlockerAcquired = true; mScreenOnBlocker.acquire(); } updatePendingBroadcastLocked(); } } else { // Going to sleep... mLastGoToSleepReason = reason; } } mInputManagerInternal.setInteractive(interactive); if (interactive) { try { mBatteryStats.noteInteractive(true); } catch (RemoteException ex) { } } } /** * Notifies that the device has finished changing interactive state. */ public void onInteractiveStateChangeFinished(boolean interactive) { if (DEBUG) { Slog.d(TAG, "onInteractiveChangeFinished"); } synchronized (mLock) { if (!interactive) { // Finished going to sleep... // This is a good time to make transitions that we don't want the user to see, // such as bringing the key guard to focus. There's no guarantee for this, // however because the user could turn the device on again at any time. // Some things may need to be protected by other mechanisms that defer screen on. if (mActualPowerState != POWER_STATE_ASLEEP) { mActualPowerState = POWER_STATE_ASLEEP; mPendingGoToSleepBroadcast = true; if (mUserActivityPending) { mUserActivityPending = false; mHandler.removeMessages(MSG_USER_ACTIVITY); } updatePendingBroadcastLocked(); } } } if (!interactive) { try { mBatteryStats.noteInteractive(false); } catch (RemoteException ex) { } } } /** * Called when there has been user activity. */ public void onUserActivity(int event, int uid) { if (DEBUG) { Slog.d(TAG, "onUserActivity: event=" + event + ", uid=" + uid); } try { mBatteryStats.noteUserActivity(uid, event); } catch (RemoteException ex) { // Ignore } synchronized (mLock) { if (!mUserActivityPending) { mUserActivityPending = true; Message msg = mHandler.obtainMessage(MSG_USER_ACTIVITY); msg.setAsynchronous(true); mHandler.sendMessage(msg); } } } /** * Called when wireless charging has started so as to provide user feedback. */ public void onWirelessChargingStarted() { if (DEBUG) { Slog.d(TAG, "onWirelessChargingStarted"); } mSuspendBlocker.acquire(); Message msg = mHandler.obtainMessage(MSG_WIRELESS_CHARGING_STARTED); msg.setAsynchronous(true); mHandler.sendMessage(msg); } private void updatePendingBroadcastLocked() { if (!mBroadcastInProgress && mActualPowerState != POWER_STATE_UNKNOWN && (mPendingWakeUpBroadcast || mPendingGoToSleepBroadcast || mActualPowerState != mBroadcastedPowerState)) { mBroadcastInProgress = true; mSuspendBlocker.acquire(); Message msg = mHandler.obtainMessage(MSG_BROADCAST); msg.setAsynchronous(true); mHandler.sendMessage(msg); } } private void finishPendingBroadcastLocked() { mBroadcastInProgress = false; mSuspendBlocker.release(); } private void sendUserActivity() { synchronized (mLock) { if (!mUserActivityPending) { return; } mUserActivityPending = false; } mPolicy.userActivity(); } private void sendNextBroadcast() { final int powerState; final int goToSleepReason; synchronized (mLock) { if (mBroadcastedPowerState == POWER_STATE_UNKNOWN) { // Broadcasted power state is unknown. Send wake up. mPendingWakeUpBroadcast = false; mBroadcastedPowerState = POWER_STATE_AWAKE; } else if (mBroadcastedPowerState == POWER_STATE_AWAKE) { // Broadcasted power state is awake. Send asleep if needed. if (mPendingWakeUpBroadcast || mPendingGoToSleepBroadcast || mActualPowerState == POWER_STATE_ASLEEP) { mPendingGoToSleepBroadcast = false; mBroadcastedPowerState = POWER_STATE_ASLEEP; } else { finishPendingBroadcastLocked(); return; } } else { // Broadcasted power state is asleep. Send awake if needed. if (mPendingWakeUpBroadcast || mPendingGoToSleepBroadcast || mActualPowerState == POWER_STATE_AWAKE) { mPendingWakeUpBroadcast = false; mBroadcastedPowerState = POWER_STATE_AWAKE; } else { finishPendingBroadcastLocked(); return; } } mBroadcastStartTime = SystemClock.uptimeMillis(); powerState = mBroadcastedPowerState; goToSleepReason = mLastGoToSleepReason; } EventLog.writeEvent(EventLogTags.POWER_SCREEN_BROADCAST_SEND, 1); if (powerState == POWER_STATE_AWAKE) { sendWakeUpBroadcast(); } else { sendGoToSleepBroadcast(goToSleepReason); } } private void sendWakeUpBroadcast() { if (DEBUG) { Slog.d(TAG, "Sending wake up broadcast."); } EventLog.writeEvent(EventLogTags.POWER_SCREEN_STATE, 1, 0, 0, 0); mPolicy.wakingUp(mScreenOnListener); mActivityManagerInternal.wakingUp(); if (ActivityManagerNative.isSystemReady()) { mContext.sendOrderedBroadcastAsUser(mScreenOnIntent, UserHandle.ALL, null, mWakeUpBroadcastDone, mHandler, 0, null, null); } else { EventLog.writeEvent(EventLogTags.POWER_SCREEN_BROADCAST_STOP, 2, 1); sendNextBroadcast(); } } private final WindowManagerPolicy.ScreenOnListener mScreenOnListener = new WindowManagerPolicy.ScreenOnListener() { @Override public void onScreenOn() { synchronized (mLock) { if (mScreenOnBlockerAcquired && !mPendingWakeUpBroadcast) { mScreenOnBlockerAcquired = false; mScreenOnBlocker.release(); } } } }; private final BroadcastReceiver mWakeUpBroadcastDone = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { EventLog.writeEvent(EventLogTags.POWER_SCREEN_BROADCAST_DONE, 1, SystemClock.uptimeMillis() - mBroadcastStartTime, 1); sendNextBroadcast(); } }; private void sendGoToSleepBroadcast(int reason) { if (DEBUG) { Slog.d(TAG, "Sending go to sleep broadcast."); } int why = WindowManagerPolicy.OFF_BECAUSE_OF_USER; switch (reason) { case PowerManager.GO_TO_SLEEP_REASON_DEVICE_ADMIN: why = WindowManagerPolicy.OFF_BECAUSE_OF_ADMIN; break; case PowerManager.GO_TO_SLEEP_REASON_TIMEOUT: why = WindowManagerPolicy.OFF_BECAUSE_OF_TIMEOUT; break; } EventLog.writeEvent(EventLogTags.POWER_SCREEN_STATE, 0, why, 0, 0); mPolicy.goingToSleep(why); mActivityManagerInternal.goingToSleep(); if (ActivityManagerNative.isSystemReady()) { mContext.sendOrderedBroadcastAsUser(mScreenOffIntent, UserHandle.ALL, null, mGoToSleepBroadcastDone, mHandler, 0, null, null); } else { EventLog.writeEvent(EventLogTags.POWER_SCREEN_BROADCAST_STOP, 3, 1); sendNextBroadcast(); } } private final BroadcastReceiver mGoToSleepBroadcastDone = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { EventLog.writeEvent(EventLogTags.POWER_SCREEN_BROADCAST_DONE, 0, SystemClock.uptimeMillis() - mBroadcastStartTime, 1); sendNextBroadcast(); } }; private void playWirelessChargingStartedSound() { final String soundPath = Settings.Global.getString(mContext.getContentResolver(), Settings.Global.WIRELESS_CHARGING_STARTED_SOUND); if (soundPath != null) { final Uri soundUri = Uri.parse("file://" + soundPath); if (soundUri != null) { final Ringtone sfx = RingtoneManager.getRingtone(mContext, soundUri); if (sfx != null) { sfx.setStreamType(AudioManager.STREAM_SYSTEM); sfx.play(); } } } mSuspendBlocker.release(); } private final class NotifierHandler extends Handler { public NotifierHandler(Looper looper) { super(looper, null, true /*async*/); } @Override public void handleMessage(Message msg) { switch (msg.what) { case MSG_USER_ACTIVITY: sendUserActivity(); break; case MSG_BROADCAST: sendNextBroadcast(); break; case MSG_WIRELESS_CHARGING_STARTED: playWirelessChargingStartedSound(); break; } } } }