| /* |
| * Copyright (C) 2015 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.car; |
| |
| import android.annotation.Nullable; |
| import android.annotation.UserIdInt; |
| import android.app.ActivityManager; |
| import android.car.Car; |
| import android.car.hardware.power.CarPowerManager.CarPowerStateListener; |
| import android.car.hardware.power.ICarPower; |
| import android.car.hardware.power.ICarPowerStateListener; |
| import android.car.userlib.CarUserManagerHelper; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.pm.UserInfo; |
| import android.content.res.Resources; |
| import android.hardware.automotive.vehicle.V2_0.VehicleApPowerStateReq; |
| import android.os.Build; |
| import android.os.Handler; |
| import android.os.HandlerThread; |
| import android.os.IBinder; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.PowerManager; |
| import android.os.RemoteCallbackList; |
| import android.os.RemoteException; |
| import android.os.SystemClock; |
| import android.os.SystemProperties; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import android.util.Log; |
| |
| import com.android.car.am.ContinuousBlankActivity; |
| import com.android.car.hal.PowerHalService; |
| import com.android.car.hal.PowerHalService.PowerState; |
| import com.android.car.systeminterface.SystemInterface; |
| import com.android.car.user.CarUserNoticeService; |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| import java.io.PrintWriter; |
| import java.util.HashSet; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.Timer; |
| import java.util.TimerTask; |
| |
| /** |
| * Power Management service class for cars. Controls the power states and interacts with other |
| * parts of the system to ensure its own state. |
| */ |
| public class CarPowerManagementService extends ICarPower.Stub implements |
| CarServiceBase, PowerHalService.PowerEventListener { |
| |
| private final Object mLock = new Object(); |
| private final Object mSimulationWaitObject = new Object(); |
| |
| private final Context mContext; |
| private final PowerHalService mHal; |
| private final SystemInterface mSystemInterface; |
| // The listeners that complete simply by returning from onStateChanged() |
| private final PowerManagerCallbackList mPowerManagerListeners = new PowerManagerCallbackList(); |
| // The listeners that must indicate asynchronous completion by calling finished(). |
| private final PowerManagerCallbackList mPowerManagerListenersWithCompletion = |
| new PowerManagerCallbackList(); |
| |
| @GuardedBy("mSimulationWaitObject") |
| private boolean mWakeFromSimulatedSleep; |
| @GuardedBy("mSimulationWaitObject") |
| private boolean mInSimulatedDeepSleepMode; |
| |
| @GuardedBy("mLock") |
| private final Set<IBinder> mListenersWeAreWaitingFor = new HashSet<>(); |
| @GuardedBy("mLock") |
| private CpmsState mCurrentState; |
| @GuardedBy("mLock") |
| private Timer mTimer; |
| @GuardedBy("mLock") |
| private long mProcessingStartTime; |
| @GuardedBy("mLock") |
| private long mLastSleepEntryTime; |
| @GuardedBy("mLock") |
| private final LinkedList<CpmsState> mPendingPowerStates = new LinkedList<>(); |
| @GuardedBy("mLock") |
| private HandlerThread mHandlerThread; |
| @GuardedBy("mLock") |
| private PowerHandler mHandler; |
| @GuardedBy("mLock") |
| private boolean mTimerActive; |
| @GuardedBy("mLock") |
| private int mNextWakeupSec; |
| @GuardedBy("mLock") |
| private boolean mShutdownOnFinish; |
| @GuardedBy("mLock") |
| private boolean mShutdownOnNextSuspend; |
| @GuardedBy("mLock") |
| private boolean mIsBooting = true; |
| @GuardedBy("mLock") |
| private boolean mIsResuming; |
| @GuardedBy("mLock") |
| private boolean mRebootAfterGarageMode; |
| private final boolean mDisableUserSwitchDuringResume; |
| private final CarUserManagerHelper mCarUserManagerHelper; |
| private final UserManager mUserManager; // CarUserManagerHelper is deprecated... |
| private final String mNewGuestName; |
| |
| // TODO: Make this OEM configurable. |
| private static final int SHUTDOWN_POLLING_INTERVAL_MS = 2000; |
| private static final int SHUTDOWN_EXTEND_MAX_MS = 5000; |
| |
| // maxGarageModeRunningDurationInSecs should be equal or greater than this. 15 min for now. |
| private static final int MIN_MAX_GARAGE_MODE_DURATION_MS = 15 * 60 * 1000; |
| |
| private static int sShutdownPrepareTimeMs = MIN_MAX_GARAGE_MODE_DURATION_MS; |
| |
| // in secs |
| private static final String PROP_MAX_GARAGE_MODE_DURATION_OVERRIDE = |
| "android.car.garagemodeduration"; |
| |
| // This is a temp work-around to reduce user switching delay after wake-up. |
| private final boolean mSwitchGuestUserBeforeSleep; |
| |
| private class PowerManagerCallbackList extends RemoteCallbackList<ICarPowerStateListener> { |
| /** |
| * Old version of {@link #onCallbackDied(E, Object)} that |
| * does not provide a cookie. |
| */ |
| @Override |
| public void onCallbackDied(ICarPowerStateListener listener) { |
| Log.i(CarLog.TAG_POWER, "binderDied " + listener.asBinder()); |
| CarPowerManagementService.this.doUnregisterListener(listener); |
| } |
| } |
| |
| public CarPowerManagementService(Context context, PowerHalService powerHal, |
| SystemInterface systemInterface, CarUserManagerHelper carUserManagerHelper) { |
| this(context, context.getResources(), powerHal, systemInterface, carUserManagerHelper, |
| UserManager.get(context), context.getString(R.string.default_guest_name)); |
| } |
| |
| @VisibleForTesting |
| CarPowerManagementService(Context context, Resources resources, PowerHalService powerHal, |
| SystemInterface systemInterface, CarUserManagerHelper carUserManagerHelper, |
| UserManager userManager, String newGuestName) { |
| mContext = context; |
| mHal = powerHal; |
| mSystemInterface = systemInterface; |
| mCarUserManagerHelper = carUserManagerHelper; |
| mUserManager = userManager; |
| mDisableUserSwitchDuringResume = resources |
| .getBoolean(R.bool.config_disableUserSwitchDuringResume); |
| sShutdownPrepareTimeMs = resources.getInteger( |
| R.integer.maxGarageModeRunningDurationInSecs) * 1000; |
| mSwitchGuestUserBeforeSleep = resources.getBoolean( |
| R.bool.config_switchGuestUserBeforeGoingSleep); |
| if (sShutdownPrepareTimeMs < MIN_MAX_GARAGE_MODE_DURATION_MS) { |
| Log.w(CarLog.TAG_POWER, |
| "maxGarageModeRunningDurationInSecs smaller than minimum required, resource:" |
| + sShutdownPrepareTimeMs + "(ms) while should exceed:" |
| + MIN_MAX_GARAGE_MODE_DURATION_MS + "(ms), Ignore resource."); |
| sShutdownPrepareTimeMs = MIN_MAX_GARAGE_MODE_DURATION_MS; |
| } |
| mNewGuestName = newGuestName; |
| } |
| |
| @VisibleForTesting |
| protected static void setShutdownPrepareTimeout(int timeoutMs) { |
| // Override the timeout to keep testing time short |
| if (timeoutMs < SHUTDOWN_EXTEND_MAX_MS) { |
| sShutdownPrepareTimeMs = SHUTDOWN_EXTEND_MAX_MS; |
| } else { |
| sShutdownPrepareTimeMs = timeoutMs; |
| } |
| } |
| |
| @VisibleForTesting |
| protected HandlerThread getHandlerThread() { |
| synchronized (mLock) { |
| return mHandlerThread; |
| } |
| } |
| |
| @Override |
| public void init() { |
| synchronized (mLock) { |
| mHandlerThread = new HandlerThread(CarLog.TAG_POWER); |
| mHandlerThread.start(); |
| mHandler = new PowerHandler(mHandlerThread.getLooper()); |
| } |
| |
| mHal.setListener(this); |
| if (mHal.isPowerStateSupported()) { |
| // Initialize CPMS in WAIT_FOR_VHAL state |
| onApPowerStateChange(CpmsState.WAIT_FOR_VHAL, CarPowerStateListener.WAIT_FOR_VHAL); |
| } else { |
| Log.w(CarLog.TAG_POWER, "Vehicle hal does not support power state yet."); |
| onApPowerStateChange(CpmsState.ON, CarPowerStateListener.ON); |
| } |
| mSystemInterface.startDisplayStateMonitoring(this); |
| } |
| |
| @Override |
| public void release() { |
| HandlerThread handlerThread; |
| synchronized (mLock) { |
| releaseTimerLocked(); |
| mCurrentState = null; |
| mHandler.cancelAll(); |
| handlerThread = mHandlerThread; |
| mListenersWeAreWaitingFor.clear(); |
| } |
| handlerThread.quitSafely(); |
| try { |
| handlerThread.join(1000); |
| } catch (InterruptedException e) { |
| Log.e(CarLog.TAG_POWER, "Timeout while joining for handler thread to join."); |
| } |
| mSystemInterface.stopDisplayStateMonitoring(); |
| mPowerManagerListeners.kill(); |
| mSystemInterface.releaseAllWakeLocks(); |
| } |
| |
| @Override |
| public void dump(PrintWriter writer) { |
| writer.println("*PowerManagementService*"); |
| writer.print("mCurrentState:" + mCurrentState); |
| writer.print(",mProcessingStartTime:" + mProcessingStartTime); |
| writer.print(",mLastSleepEntryTime:" + mLastSleepEntryTime); |
| writer.print(",mNextWakeupSec:" + mNextWakeupSec); |
| writer.print(",mShutdownOnNextSuspend:" + mShutdownOnNextSuspend); |
| writer.print(",mShutdownOnFinish:" + mShutdownOnFinish); |
| writer.print(",sShutdownPrepareTimeMs:" + sShutdownPrepareTimeMs); |
| writer.print(",mDisableUserSwitchDuringResume:" + mDisableUserSwitchDuringResume); |
| writer.println(",mRebootAfterGarageMode:" + mRebootAfterGarageMode); |
| writer.print("mNewGuestName: "); writer.println(mNewGuestName); |
| writer.println("mSwitchGuestUserBeforeSleep:" + mSwitchGuestUserBeforeSleep); |
| } |
| |
| @Override |
| public void onApPowerStateChange(PowerState state) { |
| PowerHandler handler; |
| synchronized (mLock) { |
| mPendingPowerStates.addFirst(new CpmsState(state)); |
| handler = mHandler; |
| } |
| handler.handlePowerStateChange(); |
| } |
| |
| @VisibleForTesting |
| void setStateForTesting(boolean isBooting, boolean isResuming) { |
| synchronized (mLock) { |
| Log.d(CarLog.TAG_POWER, "setStateForTesting():" |
| + " booting(" + mIsBooting + ">" + isBooting + ")" |
| + " resuming(" + mIsResuming + ">" + isResuming + ")"); |
| mIsBooting = isBooting; |
| mIsResuming = isResuming; |
| } |
| } |
| |
| /** |
| * Initiate state change from CPMS directly. |
| */ |
| private void onApPowerStateChange(int apState, int carPowerStateListenerState) { |
| CpmsState newState = new CpmsState(apState, carPowerStateListenerState); |
| PowerHandler handler; |
| synchronized (mLock) { |
| mPendingPowerStates.addFirst(newState); |
| handler = mHandler; |
| } |
| handler.handlePowerStateChange(); |
| } |
| |
| private void doHandlePowerStateChange() { |
| CpmsState state; |
| PowerHandler handler; |
| synchronized (mLock) { |
| state = mPendingPowerStates.peekFirst(); |
| mPendingPowerStates.clear(); |
| if (state == null) { |
| return; |
| } |
| Log.i(CarLog.TAG_POWER, "doHandlePowerStateChange: newState=" + state.name()); |
| if (!needPowerStateChangeLocked(state)) { |
| Log.d(CarLog.TAG_POWER, "doHandlePowerStateChange no change needed"); |
| return; |
| } |
| // now real power change happens. Whatever was queued before should be all cancelled. |
| releaseTimerLocked(); |
| handler = mHandler; |
| } |
| handler.cancelProcessingComplete(); |
| Log.i(CarLog.TAG_POWER, "setCurrentState " + state.toString()); |
| CarStatsLog.logPowerState(state.mState); |
| mCurrentState = state; |
| switch (state.mState) { |
| case CpmsState.WAIT_FOR_VHAL: |
| handleWaitForVhal(state); |
| break; |
| case CpmsState.ON: |
| handleOn(); |
| break; |
| case CpmsState.SHUTDOWN_PREPARE: |
| handleShutdownPrepare(state); |
| break; |
| case CpmsState.SIMULATE_SLEEP: |
| simulateShutdownPrepare(); |
| break; |
| case CpmsState.WAIT_FOR_FINISH: |
| handleWaitForFinish(state); |
| break; |
| case CpmsState.SUSPEND: |
| // Received FINISH from VHAL |
| handleFinish(); |
| break; |
| default: |
| // Illegal state |
| // TODO: Throw exception? |
| break; |
| } |
| } |
| |
| private void handleWaitForVhal(CpmsState state) { |
| int carPowerStateListenerState = state.mCarPowerStateListenerState; |
| sendPowerManagerEvent(carPowerStateListenerState); |
| // Inspect CarPowerStateListenerState to decide which message to send via VHAL |
| switch (carPowerStateListenerState) { |
| case CarPowerStateListener.WAIT_FOR_VHAL: |
| mHal.sendWaitForVhal(); |
| break; |
| case CarPowerStateListener.SHUTDOWN_CANCELLED: |
| mShutdownOnNextSuspend = false; // This cancels the "NextSuspend" |
| mHal.sendShutdownCancel(); |
| break; |
| case CarPowerStateListener.SUSPEND_EXIT: |
| mHal.sendSleepExit(); |
| break; |
| } |
| } |
| |
| private void updateCarUserNoticeServiceIfNecessary() { |
| try { |
| int currentUserId = ActivityManager.getCurrentUser(); |
| UserInfo currentUserInfo = mUserManager.getUserInfo(currentUserId); |
| CarUserNoticeService carUserNoticeService = |
| CarLocalServices.getService(CarUserNoticeService.class); |
| if (currentUserInfo != null && currentUserInfo.isGuest() |
| && carUserNoticeService != null) { |
| Log.i(CarLog.TAG_POWER, |
| "Car user notice service will ignore all messages before user switch."); |
| Intent intent = new Intent(); |
| intent.setComponent(new ComponentName(mContext.getPackageName(), |
| ContinuousBlankActivity.class.getName())); |
| intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); |
| mContext.startActivityAsUser(intent, UserHandle.CURRENT); |
| carUserNoticeService.ignoreUserNotice(currentUserId); |
| } |
| } catch (Exception e) { |
| Log.w(CarLog.TAG_POWER, "Cannot ignore user notice for current user", e); |
| } |
| } |
| |
| private void handleOn() { |
| // If current user is a Guest User, we want to inform CarUserNoticeService not to show |
| // notice for current user, and show user notice only for the target user. |
| if (!mSwitchGuestUserBeforeSleep) { |
| updateCarUserNoticeServiceIfNecessary(); |
| } |
| |
| // Some OEMs have their own user-switching logic, which may not be coordinated with this |
| // code. To avoid contention, we don't switch users when we coming alive. The OEM's code |
| // should do the switch. |
| boolean allowUserSwitch = true; |
| synchronized (mLock) { |
| if (mIsBooting) { |
| // The system is booting, so don't switch users |
| allowUserSwitch = false; |
| mIsBooting = false; |
| mIsResuming = false; |
| Log.i(CarLog.TAG_POWER, "User switch disallowed while booting"); |
| } else { |
| // The system is resuming after a suspension. Optionally disable user switching. |
| allowUserSwitch = !mDisableUserSwitchDuringResume; |
| mIsBooting = false; |
| mIsResuming = false; |
| if (!allowUserSwitch) { |
| Log.i(CarLog.TAG_POWER, "User switch disallowed while resuming"); |
| } |
| } |
| } |
| |
| mSystemInterface.setDisplayState(true); |
| sendPowerManagerEvent(CarPowerStateListener.ON); |
| mHal.sendOn(); |
| |
| try { |
| switchUserOnResumeIfNecessary(allowUserSwitch); |
| } catch (Exception e) { |
| Log.e(CarLog.TAG_POWER, "Could not switch user on resume: " + e); |
| } |
| } |
| |
| private void switchUserIfCurrentUserIsGuest() { |
| int currentUserId = ActivityManager.getCurrentUser(); |
| UserInfo currentUserInfo = mUserManager.getUserInfo(currentUserId); |
| boolean isGuest = currentUserInfo.isGuest(); |
| if (!isGuest) { |
| return; |
| } |
| Log.d(CarLog.TAG_POWER, "Switching into new guest user before going to sleep"); |
| doSwitchFromGuestToNewGuest(currentUserInfo); |
| } |
| |
| private void switchUserOnResumeIfNecessary(boolean allowSwitching) { |
| int targetUserId = mCarUserManagerHelper.getInitialUser(); |
| if (targetUserId == UserHandle.USER_SYSTEM) { |
| // API explicitly say it doesn't return USER_SYSTEM |
| Log.wtf(CarLog.TAG_POWER, "getInitialUser() returned system user"); |
| return; |
| } |
| int currentUserId = ActivityManager.getCurrentUser(); |
| UserInfo targetUserInfo = mUserManager.getUserInfo(targetUserId); |
| boolean isTargetPersistent = !targetUserInfo.isEphemeral(); |
| boolean isTargetGuest = targetUserInfo.isGuest(); |
| Log.d(CarLog.TAG_POWER, "getTargetUserId(): current=" + currentUserId |
| + ", target=" + targetUserInfo.toFullString() |
| + ", isTargetPersistent=" + isTargetPersistent + ", isTargetGuest=" + isTargetGuest |
| + ", allowSwitching: " + allowSwitching); |
| |
| if (isTargetPersistent && !isTargetGuest) { |
| if (!allowSwitching) { |
| Log.d(CarLog.TAG_POWER, "Not switching to " + targetUserId |
| + " because it's not allowed"); |
| return; |
| } |
| if (currentUserId == targetUserId) { |
| Log.v(CarLog.TAG_POWER, "no need to switch to (same user) " + currentUserId); |
| return; |
| } |
| // All good - switch to the requested user |
| switchToUser(currentUserId, targetUserId, /* reason= */ null); |
| return; |
| } |
| |
| if (!isTargetGuest) { |
| // Shouldn't happen (unless OEM is explicitly creating ephemeral users, which |
| // doesn't make much sense), but it doesn't hurt to log... |
| Log.w(CarLog.TAG_POWER, "target user is ephemeral but not a guest: " |
| + targetUserInfo.toFullString()); |
| if (allowSwitching) { |
| switchToUser(currentUserId, targetUserId, /* reason= */ null); |
| } |
| return; |
| } else if (isTargetPersistent) { |
| // TODO(b/146380030): decide whether we should delete it or not |
| // Shouldn't happen neither, but it's not a big deal (guest will be replaced below |
| // anyway), but it's worth logging as well... |
| Log.w(CarLog.TAG_POWER, "target user is a non-ephemeral guest: " |
| + targetUserInfo.toFullString()); |
| } |
| |
| // At this point, target user is a guest - we cannot resume into an ephemeral guest for |
| // privacy reasons, so we need to create a new guest and switch to it (even if the OEM |
| // doesn't allow switching) |
| if (mSwitchGuestUserBeforeSleep) { // already handled |
| return; |
| } |
| |
| doSwitchFromGuestToNewGuest(targetUserInfo); |
| } |
| |
| private void doSwitchFromGuestToNewGuest(UserInfo currentGuest) { |
| boolean marked = mUserManager.markGuestForDeletion(currentGuest.id); |
| if (!marked) { |
| Log.w(CarLog.TAG_POWER, |
| "Could not mark guest user " + currentGuest.id + " for deletion"); |
| return; |
| } |
| |
| UserInfo newGuest = mUserManager.createGuest(mContext, mNewGuestName); |
| |
| if (newGuest != null) { |
| switchToUser(currentGuest.id, newGuest.id, "Created new guest"); |
| Log.d(CarLog.TAG_POWER, "Removing previous guest " + currentGuest.id); |
| mUserManager.removeUser(currentGuest.id); |
| } else { |
| Log.wtf(CarLog.TAG_POWER, "Could not create new guest"); |
| // TODO(b/146380030): decide whether we should switch to SYSTEM |
| } |
| } |
| |
| private void switchToUser(@UserIdInt int fromUser, @UserIdInt int toUser, |
| @Nullable String reason) { |
| StringBuilder message = new StringBuilder(); |
| if (reason == null) { |
| message.append("Desired user changed"); |
| } else { |
| message.append(reason); |
| } |
| message.append(", switching from ").append(fromUser).append(" to ").append(toUser); |
| Log.i(CarLog.TAG_POWER, message.toString()); |
| mCarUserManagerHelper.switchToUserId(toUser); |
| } |
| |
| private int getFirstSwitchableUser() { |
| List<UserInfo> allUsers = mUserManager.getUsers(); |
| for (UserInfo user : allUsers) { |
| if (user.id != UserHandle.USER_SYSTEM) { |
| return user.id; |
| } |
| } |
| Log.wtf(CarLog.TAG_POWER, "no switchable user: " + allUsers); |
| return UserHandle.USER_NULL; |
| } |
| |
| private void handleShutdownPrepare(CpmsState newState) { |
| mSystemInterface.setDisplayState(false); |
| // Shutdown on finish if the system doesn't support deep sleep or doesn't allow it. |
| synchronized (mLock) { |
| mShutdownOnFinish = mShutdownOnNextSuspend |
| || !mHal.isDeepSleepAllowed() |
| || !mSystemInterface.isSystemSupportingDeepSleep() |
| || !newState.mCanSleep; |
| } |
| if (newState.mCanPostpone) { |
| Log.i(CarLog.TAG_POWER, "starting shutdown prepare"); |
| sendPowerManagerEvent(CarPowerStateListener.SHUTDOWN_PREPARE); |
| mHal.sendShutdownPrepare(); |
| doHandlePreprocessing(); |
| } else { |
| Log.i(CarLog.TAG_POWER, "starting shutdown immediately"); |
| synchronized (mLock) { |
| releaseTimerLocked(); |
| } |
| // Notify hal that we are shutting down and since it is immediate, don't schedule next |
| // wake up |
| mHal.sendShutdownStart(0); |
| // shutdown HU |
| mSystemInterface.shutdown(); |
| } |
| } |
| |
| // Simulate system shutdown to Deep Sleep |
| private void simulateShutdownPrepare() { |
| mSystemInterface.setDisplayState(false); |
| Log.i(CarLog.TAG_POWER, "starting shutdown prepare"); |
| sendPowerManagerEvent(CarPowerStateListener.SHUTDOWN_PREPARE); |
| mHal.sendShutdownPrepare(); |
| doHandlePreprocessing(); |
| } |
| |
| private void handleWaitForFinish(CpmsState state) { |
| sendPowerManagerEvent(state.mCarPowerStateListenerState); |
| int wakeupSec; |
| synchronized (mLock) { |
| wakeupSec = mNextWakeupSec; |
| } |
| switch (state.mCarPowerStateListenerState) { |
| case CarPowerStateListener.SUSPEND_ENTER: |
| mHal.sendSleepEntry(wakeupSec); |
| break; |
| case CarPowerStateListener.SHUTDOWN_ENTER: |
| mHal.sendShutdownStart(wakeupSec); |
| break; |
| } |
| } |
| |
| private void handleFinish() { |
| boolean simulatedMode; |
| synchronized (mSimulationWaitObject) { |
| simulatedMode = mInSimulatedDeepSleepMode; |
| } |
| boolean mustShutDown; |
| boolean forceReboot; |
| synchronized (mLock) { |
| mustShutDown = mShutdownOnFinish && !simulatedMode; |
| forceReboot = mRebootAfterGarageMode; |
| mRebootAfterGarageMode = false; |
| } |
| if (forceReboot) { |
| PowerManager powerManager = mContext.getSystemService(PowerManager.class); |
| if (powerManager == null) { |
| Log.wtf(CarLog.TAG_POWER, "No PowerManager. Cannot reboot."); |
| } else { |
| Log.i(CarLog.TAG_POWER, "GarageMode has completed. Forcing reboot."); |
| powerManager.reboot("GarageModeReboot"); |
| throw new AssertionError("Should not return from PowerManager.reboot()"); |
| } |
| } |
| if (mustShutDown) { |
| // shutdown HU |
| mSystemInterface.shutdown(); |
| } else { |
| doHandleDeepSleep(simulatedMode); |
| } |
| mShutdownOnNextSuspend = false; |
| } |
| |
| @GuardedBy("mLock") |
| private void releaseTimerLocked() { |
| if (mTimer != null) { |
| mTimer.cancel(); |
| } |
| mTimer = null; |
| mTimerActive = false; |
| } |
| |
| private void doHandlePreprocessing() { |
| int pollingCount = (sShutdownPrepareTimeMs / SHUTDOWN_POLLING_INTERVAL_MS) + 1; |
| if (Build.IS_USERDEBUG || Build.IS_ENG) { |
| int shutdownPrepareTimeOverrideInSecs = |
| SystemProperties.getInt(PROP_MAX_GARAGE_MODE_DURATION_OVERRIDE, -1); |
| if (shutdownPrepareTimeOverrideInSecs >= 0) { |
| pollingCount = |
| (shutdownPrepareTimeOverrideInSecs * 1000 / SHUTDOWN_POLLING_INTERVAL_MS) |
| + 1; |
| Log.i(CarLog.TAG_POWER, |
| "Garage mode duration overridden secs:" |
| + shutdownPrepareTimeOverrideInSecs); |
| } |
| } |
| Log.i(CarLog.TAG_POWER, "processing before shutdown expected for: " |
| + sShutdownPrepareTimeMs + " ms, adding polling:" + pollingCount); |
| synchronized (mLock) { |
| mProcessingStartTime = SystemClock.elapsedRealtime(); |
| releaseTimerLocked(); |
| mTimer = new Timer(); |
| mTimerActive = true; |
| mTimer.scheduleAtFixedRate( |
| new ShutdownProcessingTimerTask(pollingCount), |
| 0 /*delay*/, |
| SHUTDOWN_POLLING_INTERVAL_MS); |
| } |
| if (mSwitchGuestUserBeforeSleep) { |
| switchUserIfCurrentUserIsGuest(); |
| } |
| } |
| |
| private void sendPowerManagerEvent(int newState) { |
| // Broadcast to the listeners that do not signal completion |
| notifyListeners(mPowerManagerListeners, newState); |
| |
| // SHUTDOWN_PREPARE is the only state where we need |
| // to maintain callbacks from listener components. |
| boolean allowCompletion = (newState == CarPowerStateListener.SHUTDOWN_PREPARE); |
| |
| // Fully populate mListenersWeAreWaitingFor before calling any onStateChanged() |
| // for the listeners that signal completion. |
| // Otherwise, if the first listener calls finish() synchronously, we will |
| // see the list go empty and we will think that we are done. |
| boolean haveSomeCompleters = false; |
| PowerManagerCallbackList completingListeners = new PowerManagerCallbackList(); |
| synchronized (mLock) { |
| mListenersWeAreWaitingFor.clear(); |
| int idx = mPowerManagerListenersWithCompletion.beginBroadcast(); |
| while (idx-- > 0) { |
| ICarPowerStateListener listener = |
| mPowerManagerListenersWithCompletion.getBroadcastItem(idx); |
| completingListeners.register(listener); |
| if (allowCompletion) { |
| mListenersWeAreWaitingFor.add(listener.asBinder()); |
| haveSomeCompleters = true; |
| } |
| } |
| mPowerManagerListenersWithCompletion.finishBroadcast(); |
| } |
| // Broadcast to the listeners that DO signal completion |
| notifyListeners(completingListeners, newState); |
| |
| if (allowCompletion && !haveSomeCompleters) { |
| // No jobs need to signal completion. So we are now complete. |
| signalComplete(); |
| } |
| } |
| |
| private void notifyListeners(PowerManagerCallbackList listenerList, int newState) { |
| int idx = listenerList.beginBroadcast(); |
| while (idx-- > 0) { |
| ICarPowerStateListener listener = listenerList.getBroadcastItem(idx); |
| try { |
| listener.onStateChanged(newState); |
| } catch (RemoteException e) { |
| // It's likely the connection snapped. Let binder death handle the situation. |
| Log.e(CarLog.TAG_POWER, "onStateChanged() call failed", e); |
| } |
| } |
| listenerList.finishBroadcast(); |
| } |
| |
| private void doHandleDeepSleep(boolean simulatedMode) { |
| // keep holding partial wakelock to prevent entering sleep before enterDeepSleep call |
| // enterDeepSleep should force sleep entry even if wake lock is kept. |
| mSystemInterface.switchToPartialWakeLock(); |
| PowerHandler handler; |
| synchronized (mLock) { |
| handler = mHandler; |
| } |
| handler.cancelProcessingComplete(); |
| synchronized (mLock) { |
| mLastSleepEntryTime = SystemClock.elapsedRealtime(); |
| } |
| int nextListenerState; |
| if (simulatedMode) { |
| simulateSleepByWaiting(); |
| nextListenerState = CarPowerStateListener.SHUTDOWN_CANCELLED; |
| } else { |
| boolean sleepSucceeded = mSystemInterface.enterDeepSleep(); |
| if (!sleepSucceeded) { |
| // Suspend failed! VHAL should transition CPMS to shutdown. |
| Log.e(CarLog.TAG_POWER, "Sleep did not succeed. Now attempting to shut down."); |
| mSystemInterface.shutdown(); |
| return; |
| } |
| nextListenerState = CarPowerStateListener.SUSPEND_EXIT; |
| } |
| // On resume, reset nextWakeup time. If not set again, system will suspend/shutdown forever. |
| synchronized (mLock) { |
| mIsResuming = true; |
| mNextWakeupSec = 0; |
| } |
| Log.i(CarLog.TAG_POWER, "Resuming after suspending"); |
| mSystemInterface.refreshDisplayBrightness(); |
| onApPowerStateChange(CpmsState.WAIT_FOR_VHAL, nextListenerState); |
| } |
| |
| private boolean needPowerStateChangeLocked(CpmsState newState) { |
| if (newState == null) { |
| return false; |
| } else if (mCurrentState == null) { |
| return true; |
| } else if (mCurrentState.equals(newState)) { |
| return false; |
| } |
| |
| // The following switch/case enforces the allowed state transitions. |
| switch (mCurrentState.mState) { |
| case CpmsState.WAIT_FOR_VHAL: |
| return (newState.mState == CpmsState.ON) |
| || (newState.mState == CpmsState.SHUTDOWN_PREPARE); |
| case CpmsState.SUSPEND: |
| return newState.mState == CpmsState.WAIT_FOR_VHAL; |
| case CpmsState.ON: |
| return (newState.mState == CpmsState.SHUTDOWN_PREPARE) |
| || (newState.mState == CpmsState.SIMULATE_SLEEP); |
| case CpmsState.SHUTDOWN_PREPARE: |
| // If VHAL sends SHUTDOWN_IMMEDIATELY while in SHUTDOWN_PREPARE state, do it. |
| return ((newState.mState == CpmsState.SHUTDOWN_PREPARE) && !newState.mCanPostpone) |
| || (newState.mState == CpmsState.WAIT_FOR_FINISH) |
| || (newState.mState == CpmsState.WAIT_FOR_VHAL); |
| case CpmsState.SIMULATE_SLEEP: |
| return true; |
| case CpmsState.WAIT_FOR_FINISH: |
| return newState.mState == CpmsState.SUSPEND; |
| default: |
| Log.e(CarLog.TAG_POWER, "Unhandled state transition: currentState=" |
| + mCurrentState.name() + ", newState=" + newState.name()); |
| return false; |
| } |
| } |
| |
| private void doHandleProcessingComplete() { |
| int listenerState; |
| synchronized (mLock) { |
| releaseTimerLocked(); |
| if (!mShutdownOnFinish && mLastSleepEntryTime > mProcessingStartTime) { |
| // entered sleep after processing start. So this could be duplicate request. |
| Log.w(CarLog.TAG_POWER, "Duplicate sleep entry request, ignore"); |
| return; |
| } |
| listenerState = mShutdownOnFinish |
| ? CarPowerStateListener.SHUTDOWN_ENTER : CarPowerStateListener.SUSPEND_ENTER; |
| } |
| onApPowerStateChange(CpmsState.WAIT_FOR_FINISH, listenerState); |
| } |
| |
| @Override |
| public void onDisplayBrightnessChange(int brightness) { |
| PowerHandler handler; |
| synchronized (mLock) { |
| handler = mHandler; |
| } |
| handler.handleDisplayBrightnessChange(brightness); |
| } |
| |
| private void doHandleDisplayBrightnessChange(int brightness) { |
| mSystemInterface.setDisplayBrightness(brightness); |
| } |
| |
| private void doHandleMainDisplayStateChange(boolean on) { |
| Log.w(CarLog.TAG_POWER, "Unimplemented: doHandleMainDisplayStateChange() - on = " + on); |
| } |
| |
| public void handleMainDisplayChanged(boolean on) { |
| PowerHandler handler; |
| synchronized (mLock) { |
| handler = mHandler; |
| } |
| handler.handleMainDisplayStateChange(on); |
| } |
| |
| /** |
| * Send display brightness to VHAL. |
| * @param brightness value 0-100% |
| */ |
| public void sendDisplayBrightness(int brightness) { |
| mHal.sendDisplayBrightness(brightness); |
| } |
| |
| /** |
| * Get the PowerHandler that we use to change power states |
| */ |
| public Handler getHandler() { |
| synchronized (mLock) { |
| return mHandler; |
| } |
| } |
| |
| // Binder interface for general use. |
| // The listener is not required (or allowed) to call finished(). |
| @Override |
| public void registerListener(ICarPowerStateListener listener) { |
| ICarImpl.assertPermission(mContext, Car.PERMISSION_CAR_POWER); |
| mPowerManagerListeners.register(listener); |
| } |
| |
| // Binder interface for Car services only. |
| // After the listener completes its processing, it must call finished(). |
| @Override |
| public void registerListenerWithCompletion(ICarPowerStateListener listener) { |
| ICarImpl.assertPermission(mContext, Car.PERMISSION_CAR_POWER); |
| ICarImpl.assertCallingFromSystemProcessOrSelf(); |
| |
| mPowerManagerListenersWithCompletion.register(listener); |
| // TODO: Need to send current state to newly registered listener? If so, need to handle |
| // completion for SHUTDOWN_PREPARE state |
| } |
| |
| @Override |
| public void unregisterListener(ICarPowerStateListener listener) { |
| ICarImpl.assertPermission(mContext, Car.PERMISSION_CAR_POWER); |
| doUnregisterListener(listener); |
| } |
| |
| private void doUnregisterListener(ICarPowerStateListener listener) { |
| mPowerManagerListeners.unregister(listener); |
| boolean found = mPowerManagerListenersWithCompletion.unregister(listener); |
| if (found) { |
| // Remove this from the completion list (if it's there) |
| finishedImpl(listener.asBinder()); |
| } |
| } |
| |
| @Override |
| public void requestShutdownOnNextSuspend() { |
| ICarImpl.assertPermission(mContext, Car.PERMISSION_CAR_POWER); |
| synchronized (mLock) { |
| mShutdownOnNextSuspend = true; |
| } |
| } |
| |
| @Override |
| public void finished(ICarPowerStateListener listener) { |
| ICarImpl.assertPermission(mContext, Car.PERMISSION_CAR_POWER); |
| ICarImpl.assertCallingFromSystemProcessOrSelf(); |
| finishedImpl(listener.asBinder()); |
| } |
| |
| @Override |
| public void scheduleNextWakeupTime(int seconds) { |
| if (seconds < 0) { |
| Log.w(CarLog.TAG_POWER, "Next wake up time is negative. Ignoring!"); |
| return; |
| } |
| boolean timedWakeupAllowed = mHal.isTimedWakeupAllowed(); |
| synchronized (mLock) { |
| if (!timedWakeupAllowed) { |
| Log.w(CarLog.TAG_POWER, "Setting timed wakeups are disabled in HAL. Skipping"); |
| mNextWakeupSec = 0; |
| return; |
| } |
| if (mNextWakeupSec == 0 || mNextWakeupSec > seconds) { |
| // The new value is sooner than the old value. Take the new value. |
| mNextWakeupSec = seconds; |
| } else { |
| Log.d(CarLog.TAG_POWER, "Tried to schedule next wake up, but already had shorter " |
| + "scheduled time"); |
| } |
| } |
| } |
| |
| private void finishedImpl(IBinder binder) { |
| boolean allAreComplete = false; |
| synchronized (mLock) { |
| boolean oneWasRemoved = mListenersWeAreWaitingFor.remove(binder); |
| allAreComplete = oneWasRemoved && mListenersWeAreWaitingFor.isEmpty(); |
| } |
| if (allAreComplete) { |
| signalComplete(); |
| } |
| } |
| |
| private void signalComplete() { |
| if (mCurrentState.mState == CpmsState.SHUTDOWN_PREPARE |
| || mCurrentState.mState == CpmsState.SIMULATE_SLEEP) { |
| PowerHandler powerHandler; |
| // All apps are ready to shutdown/suspend. |
| synchronized (mLock) { |
| if (!mShutdownOnFinish) { |
| if (mLastSleepEntryTime > mProcessingStartTime |
| && mLastSleepEntryTime < SystemClock.elapsedRealtime()) { |
| Log.i(CarLog.TAG_POWER, "signalComplete: Already slept!"); |
| return; |
| } |
| } |
| powerHandler = mHandler; |
| } |
| Log.i(CarLog.TAG_POWER, "Apps are finished, call handleProcessingComplete()"); |
| powerHandler.handleProcessingComplete(); |
| } |
| } |
| |
| private class PowerHandler extends Handler { |
| private final int MSG_POWER_STATE_CHANGE = 0; |
| private final int MSG_DISPLAY_BRIGHTNESS_CHANGE = 1; |
| private final int MSG_MAIN_DISPLAY_STATE_CHANGE = 2; |
| private final int MSG_PROCESSING_COMPLETE = 3; |
| |
| // Do not handle this immediately but with some delay as there can be a race between |
| // display off due to rear view camera and delivery to here. |
| private final long MAIN_DISPLAY_EVENT_DELAY_MS = 500; |
| |
| private PowerHandler(Looper looper) { |
| super(looper); |
| } |
| |
| private void handlePowerStateChange() { |
| Message msg = obtainMessage(MSG_POWER_STATE_CHANGE); |
| sendMessage(msg); |
| } |
| |
| private void handleDisplayBrightnessChange(int brightness) { |
| Message msg = obtainMessage(MSG_DISPLAY_BRIGHTNESS_CHANGE, brightness, 0); |
| sendMessage(msg); |
| } |
| |
| private void handleMainDisplayStateChange(boolean on) { |
| removeMessages(MSG_MAIN_DISPLAY_STATE_CHANGE); |
| Message msg = obtainMessage(MSG_MAIN_DISPLAY_STATE_CHANGE, Boolean.valueOf(on)); |
| sendMessageDelayed(msg, MAIN_DISPLAY_EVENT_DELAY_MS); |
| } |
| |
| private void handleProcessingComplete() { |
| removeMessages(MSG_PROCESSING_COMPLETE); |
| Message msg = obtainMessage(MSG_PROCESSING_COMPLETE); |
| sendMessage(msg); |
| } |
| |
| private void cancelProcessingComplete() { |
| removeMessages(MSG_PROCESSING_COMPLETE); |
| } |
| |
| private void cancelAll() { |
| removeMessages(MSG_POWER_STATE_CHANGE); |
| removeMessages(MSG_DISPLAY_BRIGHTNESS_CHANGE); |
| removeMessages(MSG_MAIN_DISPLAY_STATE_CHANGE); |
| removeMessages(MSG_PROCESSING_COMPLETE); |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case MSG_POWER_STATE_CHANGE: |
| doHandlePowerStateChange(); |
| break; |
| case MSG_DISPLAY_BRIGHTNESS_CHANGE: |
| doHandleDisplayBrightnessChange(msg.arg1); |
| break; |
| case MSG_MAIN_DISPLAY_STATE_CHANGE: |
| doHandleMainDisplayStateChange((Boolean) msg.obj); |
| break; |
| case MSG_PROCESSING_COMPLETE: |
| doHandleProcessingComplete(); |
| break; |
| } |
| } |
| } |
| |
| private class ShutdownProcessingTimerTask extends TimerTask { |
| private final int mExpirationCount; |
| private int mCurrentCount; |
| |
| private ShutdownProcessingTimerTask(int expirationCount) { |
| mExpirationCount = expirationCount; |
| mCurrentCount = 0; |
| } |
| |
| @Override |
| public void run() { |
| synchronized (mLock) { |
| if (!mTimerActive) { |
| // Ignore timer expiration since we got cancelled |
| return; |
| } |
| mCurrentCount++; |
| if (mCurrentCount > mExpirationCount) { |
| PowerHandler handler; |
| releaseTimerLocked(); |
| handler = mHandler; |
| handler.handleProcessingComplete(); |
| } else { |
| mHal.sendShutdownPostpone(SHUTDOWN_EXTEND_MAX_MS); |
| } |
| } |
| } |
| } |
| |
| private static class CpmsState { |
| // NOTE: When modifying states below, make sure to update CarPowerStateChanged.State in |
| // frameworks/base/cmds/statsd/src/atoms.proto also. |
| public static final int WAIT_FOR_VHAL = 0; |
| public static final int ON = 1; |
| public static final int SHUTDOWN_PREPARE = 2; |
| public static final int WAIT_FOR_FINISH = 3; |
| public static final int SUSPEND = 4; |
| public static final int SIMULATE_SLEEP = 5; |
| |
| /* Config values from AP_POWER_STATE_REQ */ |
| public final boolean mCanPostpone; |
| public final boolean mCanSleep; |
| /* Message sent to CarPowerStateListener in response to this state */ |
| public final int mCarPowerStateListenerState; |
| /* One of the above state variables */ |
| public final int mState; |
| |
| /** |
| * This constructor takes a PowerHalService.PowerState object and creates the corresponding |
| * CPMS state from it. |
| */ |
| CpmsState(PowerState halPowerState) { |
| switch (halPowerState.mState) { |
| case VehicleApPowerStateReq.ON: |
| this.mCanPostpone = false; |
| this.mCanSleep = false; |
| this.mCarPowerStateListenerState = cpmsStateToPowerStateListenerState(ON); |
| this.mState = ON; |
| break; |
| case VehicleApPowerStateReq.SHUTDOWN_PREPARE: |
| this.mCanPostpone = halPowerState.canPostponeShutdown(); |
| this.mCanSleep = halPowerState.canEnterDeepSleep(); |
| this.mCarPowerStateListenerState = cpmsStateToPowerStateListenerState( |
| SHUTDOWN_PREPARE); |
| this.mState = SHUTDOWN_PREPARE; |
| break; |
| case VehicleApPowerStateReq.CANCEL_SHUTDOWN: |
| this.mCanPostpone = false; |
| this.mCanSleep = false; |
| this.mCarPowerStateListenerState = CarPowerStateListener.SHUTDOWN_CANCELLED; |
| this.mState = WAIT_FOR_VHAL; |
| break; |
| case VehicleApPowerStateReq.FINISHED: |
| this.mCanPostpone = false; |
| this.mCanSleep = false; |
| this.mCarPowerStateListenerState = cpmsStateToPowerStateListenerState(SUSPEND); |
| this.mState = SUSPEND; |
| break; |
| default: |
| // Illegal state from PowerState. Throw an exception? |
| this.mCanPostpone = false; |
| this.mCanSleep = false; |
| this.mCarPowerStateListenerState = 0; |
| this.mState = 0; |
| break; |
| } |
| } |
| |
| CpmsState(int state) { |
| this(state, cpmsStateToPowerStateListenerState(state)); |
| } |
| |
| CpmsState(int state, int carPowerStateListenerState) { |
| this.mCanPostpone = (state == SIMULATE_SLEEP); |
| this.mCanSleep = (state == SIMULATE_SLEEP); |
| this.mCarPowerStateListenerState = carPowerStateListenerState; |
| this.mState = state; |
| } |
| |
| public String name() { |
| String baseName; |
| switch(mState) { |
| case WAIT_FOR_VHAL: baseName = "WAIT_FOR_VHAL"; break; |
| case ON: baseName = "ON"; break; |
| case SHUTDOWN_PREPARE: baseName = "SHUTDOWN_PREPARE"; break; |
| case WAIT_FOR_FINISH: baseName = "WAIT_FOR_FINISH"; break; |
| case SUSPEND: baseName = "SUSPEND"; break; |
| case SIMULATE_SLEEP: baseName = "SIMULATE_SLEEP"; break; |
| default: baseName = "<unknown>"; break; |
| } |
| return baseName + "(" + mState + ")"; |
| } |
| |
| private static int cpmsStateToPowerStateListenerState(int state) { |
| int powerStateListenerState = 0; |
| |
| // Set the CarPowerStateListenerState based on current state |
| switch (state) { |
| case ON: |
| powerStateListenerState = CarPowerStateListener.ON; |
| break; |
| case SHUTDOWN_PREPARE: |
| powerStateListenerState = CarPowerStateListener.SHUTDOWN_PREPARE; |
| break; |
| case SUSPEND: |
| powerStateListenerState = CarPowerStateListener.SUSPEND_ENTER; |
| break; |
| case WAIT_FOR_VHAL: |
| case WAIT_FOR_FINISH: |
| default: |
| // Illegal state for this constructor. Throw an exception? |
| break; |
| } |
| return powerStateListenerState; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (!(o instanceof CpmsState)) { |
| return false; |
| } |
| CpmsState that = (CpmsState) o; |
| return this.mState == that.mState |
| && this.mCanSleep == that.mCanSleep |
| && this.mCanPostpone == that.mCanPostpone |
| && this.mCarPowerStateListenerState == that.mCarPowerStateListenerState; |
| } |
| |
| @Override |
| public String toString() { |
| return "CpmsState canSleep:" + mCanSleep + ", canPostpone=" + mCanPostpone |
| + ", carPowerStateListenerState=" + mCarPowerStateListenerState |
| + ", CpmsState=" + this.name(); |
| } |
| } |
| |
| /** |
| * Resume after a manually-invoked suspend. |
| * Invoked using "adb shell dumpsys activity service com.android.car resume". |
| */ |
| public void forceSimulatedResume() { |
| PowerHandler handler; |
| synchronized (this) { |
| // Cancel Garage Mode in case it's running |
| mPendingPowerStates.addFirst(new CpmsState(CpmsState.WAIT_FOR_VHAL, |
| CarPowerStateListener.SHUTDOWN_CANCELLED)); |
| handler = mHandler; |
| } |
| handler.handlePowerStateChange(); |
| |
| synchronized (mSimulationWaitObject) { |
| mWakeFromSimulatedSleep = true; |
| mSimulationWaitObject.notify(); |
| } |
| } |
| |
| /** |
| * Manually enter simulated suspend (Deep Sleep) mode, trigging Garage mode. |
| * If the parameter is 'true', reboot the system when Garage Mode completes. |
| * |
| * Invoked using "adb shell dumpsys activity service com.android.car suspend" or |
| * "adb shell dumpsys activity service com.android.car garage-mode reboot". |
| * This is similar to 'onApPowerStateChange()' except that it needs to create a CpmsState |
| * that is not directly derived from a VehicleApPowerStateReq. |
| */ |
| @VisibleForTesting |
| void forceSuspendAndMaybeReboot(boolean shouldReboot) { |
| synchronized (mSimulationWaitObject) { |
| mInSimulatedDeepSleepMode = true; |
| mWakeFromSimulatedSleep = false; |
| } |
| PowerHandler handler; |
| synchronized (mLock) { |
| mRebootAfterGarageMode = shouldReboot; |
| mPendingPowerStates.addFirst(new CpmsState(CpmsState.SIMULATE_SLEEP, |
| CarPowerStateListener.SHUTDOWN_PREPARE)); |
| handler = mHandler; |
| } |
| handler.handlePowerStateChange(); |
| } |
| |
| // In a real Deep Sleep, the hardware removes power from the CPU (but retains power |
| // on the RAM). This puts the processor to sleep. Upon some external signal, power |
| // is re-applied to the CPU, and processing resumes right where it left off. |
| // We simulate this behavior by calling wait(). |
| // We continue from wait() when forceSimulatedResume() is called. |
| private void simulateSleepByWaiting() { |
| Log.i(CarLog.TAG_POWER, "Starting to simulate Deep Sleep by waiting"); |
| synchronized (mSimulationWaitObject) { |
| while (!mWakeFromSimulatedSleep) { |
| try { |
| mSimulationWaitObject.wait(); |
| } catch (InterruptedException ignored) { |
| Thread.currentThread().interrupt(); // Restore interrupted status |
| } |
| } |
| mInSimulatedDeepSleepMode = false; |
| } |
| Log.i(CarLog.TAG_POWER, "Exit Deep Sleep simulation"); |
| } |
| } |
