PowerManagerService.java revision 9e316a1a2a8d734315bbd56a85308f9657a92913
1/* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package com.android.server.power; 18 19import com.android.internal.app.IBatteryStats; 20import com.android.server.BatteryService; 21import com.android.server.EventLogTags; 22import com.android.server.LightsService; 23import com.android.server.TwilightService; 24import com.android.server.Watchdog; 25import com.android.server.am.ActivityManagerService; 26import com.android.server.display.DisplayManagerService; 27import com.android.server.dreams.DreamManagerService; 28 29import android.Manifest; 30import android.content.BroadcastReceiver; 31import android.content.ContentResolver; 32import android.content.Context; 33import android.content.Intent; 34import android.content.IntentFilter; 35import android.content.pm.PackageManager; 36import android.content.res.Resources; 37import android.database.ContentObserver; 38import android.net.Uri; 39import android.os.BatteryManager; 40import android.os.Binder; 41import android.os.Handler; 42import android.os.HandlerThread; 43import android.os.IBinder; 44import android.os.IPowerManager; 45import android.os.Looper; 46import android.os.Message; 47import android.os.PowerManager; 48import android.os.Process; 49import android.os.RemoteException; 50import android.os.SystemClock; 51import android.os.UserHandle; 52import android.os.WorkSource; 53import android.provider.Settings; 54import android.util.EventLog; 55import android.util.Log; 56import android.util.Slog; 57import android.util.TimeUtils; 58import android.view.WindowManagerPolicy; 59 60import java.io.FileDescriptor; 61import java.io.IOException; 62import java.io.PrintWriter; 63import java.util.ArrayList; 64 65import libcore.util.Objects; 66 67/** 68 * The power manager service is responsible for coordinating power management 69 * functions on the device. 70 */ 71public final class PowerManagerService extends IPowerManager.Stub 72 implements Watchdog.Monitor { 73 private static final String TAG = "PowerManagerService"; 74 75 private static final boolean DEBUG = false; 76 private static final boolean DEBUG_SPEW = DEBUG && true; 77 78 // Message: Sent when a user activity timeout occurs to update the power state. 79 private static final int MSG_USER_ACTIVITY_TIMEOUT = 1; 80 // Message: Sent when the device enters or exits a napping or dreaming state. 81 private static final int MSG_SANDMAN = 2; 82 // Message: Sent when the screen on blocker is released. 83 private static final int MSG_SCREEN_ON_BLOCKER_RELEASED = 3; 84 85 // Dirty bit: mWakeLocks changed 86 private static final int DIRTY_WAKE_LOCKS = 1 << 0; 87 // Dirty bit: mWakefulness changed 88 private static final int DIRTY_WAKEFULNESS = 1 << 1; 89 // Dirty bit: user activity was poked or may have timed out 90 private static final int DIRTY_USER_ACTIVITY = 1 << 2; 91 // Dirty bit: actual display power state was updated asynchronously 92 private static final int DIRTY_ACTUAL_DISPLAY_POWER_STATE_UPDATED = 1 << 3; 93 // Dirty bit: mBootCompleted changed 94 private static final int DIRTY_BOOT_COMPLETED = 1 << 4; 95 // Dirty bit: settings changed 96 private static final int DIRTY_SETTINGS = 1 << 5; 97 // Dirty bit: mIsPowered changed 98 private static final int DIRTY_IS_POWERED = 1 << 6; 99 // Dirty bit: mStayOn changed 100 private static final int DIRTY_STAY_ON = 1 << 7; 101 // Dirty bit: battery state changed 102 private static final int DIRTY_BATTERY_STATE = 1 << 8; 103 // Dirty bit: proximity state changed 104 private static final int DIRTY_PROXIMITY_POSITIVE = 1 << 9; 105 // Dirty bit: screen on blocker state became held or unheld 106 private static final int DIRTY_SCREEN_ON_BLOCKER_RELEASED = 1 << 10; 107 108 // Wakefulness: The device is asleep and can only be awoken by a call to wakeUp(). 109 // The screen should be off or in the process of being turned off by the display controller. 110 private static final int WAKEFULNESS_ASLEEP = 0; 111 // Wakefulness: The device is fully awake. It can be put to sleep by a call to goToSleep(). 112 // When the user activity timeout expires, the device may start napping or go to sleep. 113 private static final int WAKEFULNESS_AWAKE = 1; 114 // Wakefulness: The device is napping. It is deciding whether to dream or go to sleep 115 // but hasn't gotten around to it yet. It can be awoken by a call to wakeUp(), which 116 // ends the nap. User activity may brighten the screen but does not end the nap. 117 private static final int WAKEFULNESS_NAPPING = 2; 118 // Wakefulness: The device is dreaming. It can be awoken by a call to wakeUp(), 119 // which ends the dream. The device goes to sleep when goToSleep() is called, when 120 // the dream ends or when unplugged. 121 // User activity may brighten the screen but does not end the dream. 122 private static final int WAKEFULNESS_DREAMING = 3; 123 124 // Summarizes the state of all active wakelocks. 125 private static final int WAKE_LOCK_CPU = 1 << 0; 126 private static final int WAKE_LOCK_SCREEN_BRIGHT = 1 << 1; 127 private static final int WAKE_LOCK_SCREEN_DIM = 1 << 2; 128 private static final int WAKE_LOCK_BUTTON_BRIGHT = 1 << 3; 129 private static final int WAKE_LOCK_PROXIMITY_SCREEN_OFF = 1 << 4; 130 131 // Summarizes the user activity state. 132 private static final int USER_ACTIVITY_SCREEN_BRIGHT = 1 << 0; 133 private static final int USER_ACTIVITY_SCREEN_DIM = 1 << 1; 134 135 // Default and minimum screen off timeout in milliseconds. 136 private static final int DEFAULT_SCREEN_OFF_TIMEOUT = 15 * 1000; 137 private static final int MINIMUM_SCREEN_OFF_TIMEOUT = 10 * 1000; 138 139 // The screen dim duration, in milliseconds. 140 // This is subtracted from the end of the screen off timeout so the 141 // minimum screen off timeout should be longer than this. 142 private static final int SCREEN_DIM_DURATION = 7 * 1000; 143 144 // The maximum screen dim time expressed as a ratio relative to the screen 145 // off timeout. If the screen off timeout is very short then we want the 146 // dim timeout to also be quite short so that most of the time is spent on. 147 // Otherwise the user won't get much screen on time before dimming occurs. 148 private static final float MAXIMUM_SCREEN_DIM_RATIO = 0.2f; 149 150 // Upper bound on the battery charge percentage in order to consider turning 151 // the screen on when the device starts charging wirelessly. 152 // See point of use for more details. 153 private static final int WIRELESS_CHARGER_TURN_ON_BATTERY_LEVEL_LIMIT = 95; 154 155 private Context mContext; 156 private LightsService mLightsService; 157 private BatteryService mBatteryService; 158 private DisplayManagerService mDisplayManagerService; 159 private IBatteryStats mBatteryStats; 160 private HandlerThread mHandlerThread; 161 private PowerManagerHandler mHandler; 162 private WindowManagerPolicy mPolicy; 163 private Notifier mNotifier; 164 private DisplayPowerController mDisplayPowerController; 165 private SettingsObserver mSettingsObserver; 166 private DreamManagerService mDreamManager; 167 private LightsService.Light mAttentionLight; 168 169 private final Object mLock = new Object(); 170 171 // A bitfield that indicates what parts of the power state have 172 // changed and need to be recalculated. 173 private int mDirty; 174 175 // Indicates whether the device is awake or asleep or somewhere in between. 176 // This is distinct from the screen power state, which is managed separately. 177 private int mWakefulness; 178 179 // True if MSG_SANDMAN has been scheduled. 180 private boolean mSandmanScheduled; 181 182 // Table of all suspend blockers. 183 // There should only be a few of these. 184 private final ArrayList<SuspendBlocker> mSuspendBlockers = new ArrayList<SuspendBlocker>(); 185 186 // Table of all wake locks acquired by applications. 187 private final ArrayList<WakeLock> mWakeLocks = new ArrayList<WakeLock>(); 188 189 // A bitfield that summarizes the state of all active wakelocks. 190 private int mWakeLockSummary; 191 192 // If true, instructs the display controller to wait for the proximity sensor to 193 // go negative before turning the screen on. 194 private boolean mRequestWaitForNegativeProximity; 195 196 // Timestamp of the last time the device was awoken or put to sleep. 197 private long mLastWakeTime; 198 private long mLastSleepTime; 199 200 // True if we need to send a wake up or go to sleep finished notification 201 // when the display is ready. 202 private boolean mSendWakeUpFinishedNotificationWhenReady; 203 private boolean mSendGoToSleepFinishedNotificationWhenReady; 204 205 // Timestamp of the last call to user activity. 206 private long mLastUserActivityTime; 207 private long mLastUserActivityTimeNoChangeLights; 208 209 // A bitfield that summarizes the effect of the user activity timer. 210 // A zero value indicates that the user activity timer has expired. 211 private int mUserActivitySummary; 212 213 // The desired display power state. The actual state may lag behind the 214 // requested because it is updated asynchronously by the display power controller. 215 private final DisplayPowerRequest mDisplayPowerRequest = new DisplayPowerRequest(); 216 217 // The time the screen was last turned off, in elapsedRealtime() timebase. 218 private long mLastScreenOffEventElapsedRealTime; 219 220 // True if the display power state has been fully applied, which means the display 221 // is actually on or actually off or whatever was requested. 222 private boolean mDisplayReady; 223 224 // True if holding a wake-lock to block suspend of the CPU. 225 private boolean mHoldingWakeLockSuspendBlocker; 226 227 // The suspend blocker used to keep the CPU alive when wake locks have been acquired. 228 private final SuspendBlocker mWakeLockSuspendBlocker; 229 230 // The screen on blocker used to keep the screen from turning on while the lock 231 // screen is coming up. 232 private final ScreenOnBlockerImpl mScreenOnBlocker; 233 234 // The display blanker used to turn the screen on or off. 235 private final DisplayBlankerImpl mDisplayBlanker; 236 237 // True if systemReady() has been called. 238 private boolean mSystemReady; 239 240 // True if boot completed occurred. We keep the screen on until this happens. 241 private boolean mBootCompleted; 242 243 // True if the device is plugged into a power source. 244 private boolean mIsPowered; 245 246 // The current plug type, such as BatteryManager.BATTERY_PLUGGED_WIRELESS. 247 private int mPlugType; 248 249 // True if the device should wake up when plugged or unplugged. 250 private boolean mWakeUpWhenPluggedOrUnpluggedConfig; 251 252 // True if dreams are supported on this device. 253 private boolean mDreamsSupportedConfig; 254 255 // True if dreams are enabled by the user. 256 private boolean mDreamsEnabledSetting; 257 258 // True if dreams should be activated on sleep. 259 private boolean mDreamsActivateOnSleepSetting; 260 261 // The screen off timeout setting value in milliseconds. 262 private int mScreenOffTimeoutSetting; 263 264 // The maximum allowable screen off timeout according to the device 265 // administration policy. Overrides other settings. 266 private int mMaximumScreenOffTimeoutFromDeviceAdmin = Integer.MAX_VALUE; 267 268 // The stay on while plugged in setting. 269 // A bitfield of battery conditions under which to make the screen stay on. 270 private int mStayOnWhilePluggedInSetting; 271 272 // True if the device should stay on. 273 private boolean mStayOn; 274 275 // True if the proximity sensor reads a positive result. 276 private boolean mProximityPositive; 277 278 // Screen brightness setting limits. 279 private int mScreenBrightnessSettingMinimum; 280 private int mScreenBrightnessSettingMaximum; 281 private int mScreenBrightnessSettingDefault; 282 283 // The screen brightness setting, from 0 to 255. 284 // Use -1 if no value has been set. 285 private int mScreenBrightnessSetting; 286 287 // The screen auto-brightness adjustment setting, from -1 to 1. 288 // Use 0 if there is no adjustment. 289 private float mScreenAutoBrightnessAdjustmentSetting; 290 291 // The screen brightness mode. 292 // One of the Settings.System.SCREEN_BRIGHTNESS_MODE_* constants. 293 private int mScreenBrightnessModeSetting; 294 295 // The screen brightness setting override from the window manager 296 // to allow the current foreground activity to override the brightness. 297 // Use -1 to disable. 298 private int mScreenBrightnessOverrideFromWindowManager = -1; 299 300 // The user activity timeout override from the window manager 301 // to allow the current foreground activity to override the user activity timeout. 302 // Use -1 to disable. 303 private long mUserActivityTimeoutOverrideFromWindowManager = -1; 304 305 // The screen brightness setting override from the settings application 306 // to temporarily adjust the brightness until next updated, 307 // Use -1 to disable. 308 private int mTemporaryScreenBrightnessSettingOverride = -1; 309 310 // The screen brightness adjustment setting override from the settings 311 // application to temporarily adjust the auto-brightness adjustment factor 312 // until next updated, in the range -1..1. 313 // Use NaN to disable. 314 private float mTemporaryScreenAutoBrightnessAdjustmentSettingOverride = Float.NaN; 315 316 // Time when we last logged a warning about calling userActivity() without permission. 317 private long mLastWarningAboutUserActivityPermission = Long.MIN_VALUE; 318 319 private native void nativeInit(); 320 private static native void nativeShutdown(); 321 private static native void nativeReboot(String reason) throws IOException; 322 323 private static native void nativeSetPowerState(boolean screenOn, boolean screenBright); 324 private static native void nativeAcquireSuspendBlocker(String name); 325 private static native void nativeReleaseSuspendBlocker(String name); 326 private static native void nativeSetInteractive(boolean enable); 327 private static native void nativeSetAutoSuspend(boolean enable); 328 329 public PowerManagerService() { 330 synchronized (mLock) { 331 mWakeLockSuspendBlocker = createSuspendBlockerLocked("PowerManagerService"); 332 mWakeLockSuspendBlocker.acquire(); 333 mScreenOnBlocker = new ScreenOnBlockerImpl(); 334 mDisplayBlanker = new DisplayBlankerImpl(); 335 mHoldingWakeLockSuspendBlocker = true; 336 mWakefulness = WAKEFULNESS_AWAKE; 337 } 338 339 nativeInit(); 340 nativeSetPowerState(true, true); 341 } 342 343 /** 344 * Initialize the power manager. 345 * Must be called before any other functions within the power manager are called. 346 */ 347 public void init(Context context, LightsService ls, 348 ActivityManagerService am, BatteryService bs, IBatteryStats bss, 349 DisplayManagerService dm) { 350 mContext = context; 351 mLightsService = ls; 352 mBatteryService = bs; 353 mBatteryStats = bss; 354 mDisplayManagerService = dm; 355 mHandlerThread = new HandlerThread(TAG); 356 mHandlerThread.start(); 357 mHandler = new PowerManagerHandler(mHandlerThread.getLooper()); 358 359 Watchdog.getInstance().addMonitor(this); 360 361 // Forcibly turn the screen on at boot so that it is in a known power state. 362 // We do this in init() rather than in the constructor because setting the 363 // screen state requires a call into surface flinger which then needs to call back 364 // into the activity manager to check permissions. Unfortunately the 365 // activity manager is not running when the constructor is called, so we 366 // have to defer setting the screen state until this point. 367 mDisplayBlanker.unblankAllDisplays(); 368 } 369 370 public void setPolicy(WindowManagerPolicy policy) { 371 synchronized (mLock) { 372 mPolicy = policy; 373 } 374 } 375 376 public void systemReady(TwilightService twilight, DreamManagerService dreamManager) { 377 synchronized (mLock) { 378 mSystemReady = true; 379 mDreamManager = dreamManager; 380 381 PowerManager pm = (PowerManager)mContext.getSystemService(Context.POWER_SERVICE); 382 mScreenBrightnessSettingMinimum = pm.getMinimumScreenBrightnessSetting(); 383 mScreenBrightnessSettingMaximum = pm.getMaximumScreenBrightnessSetting(); 384 mScreenBrightnessSettingDefault = pm.getDefaultScreenBrightnessSetting(); 385 386 // The notifier runs on the system server's main looper so as not to interfere 387 // with the animations and other critical functions of the power manager. 388 mNotifier = new Notifier(Looper.getMainLooper(), mContext, mBatteryStats, 389 createSuspendBlockerLocked("PowerManagerService.Broadcasts"), 390 mScreenOnBlocker, mPolicy); 391 392 // The display power controller runs on the power manager service's 393 // own handler thread. 394 mDisplayPowerController = new DisplayPowerController(mHandler.getLooper(), 395 mContext, mNotifier, mLightsService, twilight, 396 createSuspendBlockerLocked("PowerManagerService.Display"), 397 mDisplayBlanker, mDisplayPowerControllerCallbacks, mHandler); 398 399 mSettingsObserver = new SettingsObserver(mHandler); 400 mAttentionLight = mLightsService.getLight(LightsService.LIGHT_ID_ATTENTION); 401 402 // Register for broadcasts from other components of the system. 403 IntentFilter filter = new IntentFilter(); 404 filter.addAction(Intent.ACTION_BATTERY_CHANGED); 405 mContext.registerReceiver(new BatteryReceiver(), filter, null, mHandler); 406 407 filter = new IntentFilter(); 408 filter.addAction(Intent.ACTION_BOOT_COMPLETED); 409 mContext.registerReceiver(new BootCompletedReceiver(), filter, null, mHandler); 410 411 filter = new IntentFilter(); 412 filter.addAction(Intent.ACTION_DREAMING_STARTED); 413 filter.addAction(Intent.ACTION_DREAMING_STOPPED); 414 mContext.registerReceiver(new DreamReceiver(), filter, null, mHandler); 415 416 filter = new IntentFilter(); 417 filter.addAction(Intent.ACTION_USER_SWITCHED); 418 mContext.registerReceiver(new UserSwitchedReceiver(), filter, null, mHandler); 419 420 // Register for settings changes. 421 final ContentResolver resolver = mContext.getContentResolver(); 422 resolver.registerContentObserver(Settings.Secure.getUriFor( 423 Settings.Secure.SCREENSAVER_ENABLED), 424 false, mSettingsObserver, UserHandle.USER_ALL); 425 resolver.registerContentObserver(Settings.Secure.getUriFor( 426 Settings.Secure.SCREENSAVER_ACTIVATE_ON_SLEEP), 427 false, mSettingsObserver, UserHandle.USER_ALL); 428 resolver.registerContentObserver(Settings.System.getUriFor( 429 Settings.System.SCREEN_OFF_TIMEOUT), 430 false, mSettingsObserver, UserHandle.USER_ALL); 431 resolver.registerContentObserver(Settings.Global.getUriFor( 432 Settings.Global.STAY_ON_WHILE_PLUGGED_IN), 433 false, mSettingsObserver, UserHandle.USER_ALL); 434 resolver.registerContentObserver(Settings.System.getUriFor( 435 Settings.System.SCREEN_BRIGHTNESS), 436 false, mSettingsObserver, UserHandle.USER_ALL); 437 resolver.registerContentObserver(Settings.System.getUriFor( 438 Settings.System.SCREEN_BRIGHTNESS_MODE), 439 false, mSettingsObserver, UserHandle.USER_ALL); 440 441 // Go. 442 readConfigurationLocked(); 443 updateSettingsLocked(); 444 mDirty |= DIRTY_BATTERY_STATE; 445 updatePowerStateLocked(); 446 } 447 } 448 449 private void readConfigurationLocked() { 450 final Resources resources = mContext.getResources(); 451 452 mWakeUpWhenPluggedOrUnpluggedConfig = resources.getBoolean( 453 com.android.internal.R.bool.config_unplugTurnsOnScreen); 454 mDreamsSupportedConfig = resources.getBoolean( 455 com.android.internal.R.bool.config_enableDreams); 456 } 457 458 private void updateSettingsLocked() { 459 final ContentResolver resolver = mContext.getContentResolver(); 460 461 mDreamsEnabledSetting = (Settings.Secure.getIntForUser(resolver, 462 Settings.Secure.SCREENSAVER_ENABLED, 0, 463 UserHandle.USER_CURRENT) != 0); 464 mDreamsActivateOnSleepSetting = (Settings.Secure.getIntForUser(resolver, 465 Settings.Secure.SCREENSAVER_ACTIVATE_ON_SLEEP, 0, 466 UserHandle.USER_CURRENT) != 0); 467 mScreenOffTimeoutSetting = Settings.System.getIntForUser(resolver, 468 Settings.System.SCREEN_OFF_TIMEOUT, DEFAULT_SCREEN_OFF_TIMEOUT, 469 UserHandle.USER_CURRENT); 470 mStayOnWhilePluggedInSetting = Settings.Global.getInt(resolver, 471 Settings.Global.STAY_ON_WHILE_PLUGGED_IN, BatteryManager.BATTERY_PLUGGED_AC); 472 473 final int oldScreenBrightnessSetting = mScreenBrightnessSetting; 474 mScreenBrightnessSetting = Settings.System.getIntForUser(resolver, 475 Settings.System.SCREEN_BRIGHTNESS, mScreenBrightnessSettingDefault, 476 UserHandle.USER_CURRENT); 477 if (oldScreenBrightnessSetting != mScreenBrightnessSetting) { 478 mTemporaryScreenBrightnessSettingOverride = -1; 479 } 480 481 final float oldScreenAutoBrightnessAdjustmentSetting = 482 mScreenAutoBrightnessAdjustmentSetting; 483 mScreenAutoBrightnessAdjustmentSetting = Settings.System.getFloatForUser(resolver, 484 Settings.System.SCREEN_AUTO_BRIGHTNESS_ADJ, 0.0f, 485 UserHandle.USER_CURRENT); 486 if (oldScreenAutoBrightnessAdjustmentSetting != mScreenAutoBrightnessAdjustmentSetting) { 487 mTemporaryScreenAutoBrightnessAdjustmentSettingOverride = Float.NaN; 488 } 489 490 mScreenBrightnessModeSetting = Settings.System.getIntForUser(resolver, 491 Settings.System.SCREEN_BRIGHTNESS_MODE, 492 Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL, UserHandle.USER_CURRENT); 493 494 mDirty |= DIRTY_SETTINGS; 495 } 496 497 private void handleSettingsChangedLocked() { 498 updateSettingsLocked(); 499 updatePowerStateLocked(); 500 } 501 502 @Override // Binder call 503 public void acquireWakeLock(IBinder lock, int flags, String tag, WorkSource ws) { 504 if (lock == null) { 505 throw new IllegalArgumentException("lock must not be null"); 506 } 507 PowerManager.validateWakeLockParameters(flags, tag); 508 509 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null); 510 if (ws != null && ws.size() != 0) { 511 mContext.enforceCallingOrSelfPermission( 512 android.Manifest.permission.UPDATE_DEVICE_STATS, null); 513 } else { 514 ws = null; 515 } 516 517 final int uid = Binder.getCallingUid(); 518 final int pid = Binder.getCallingPid(); 519 final long ident = Binder.clearCallingIdentity(); 520 try { 521 acquireWakeLockInternal(lock, flags, tag, ws, uid, pid); 522 } finally { 523 Binder.restoreCallingIdentity(ident); 524 } 525 } 526 527 private void acquireWakeLockInternal(IBinder lock, int flags, String tag, WorkSource ws, 528 int uid, int pid) { 529 synchronized (mLock) { 530 if (DEBUG_SPEW) { 531 Slog.d(TAG, "acquireWakeLockInternal: lock=" + Objects.hashCode(lock) 532 + ", flags=0x" + Integer.toHexString(flags) 533 + ", tag=\"" + tag + "\", ws=" + ws + ", uid=" + uid + ", pid=" + pid); 534 } 535 536 WakeLock wakeLock; 537 int index = findWakeLockIndexLocked(lock); 538 if (index >= 0) { 539 wakeLock = mWakeLocks.get(index); 540 if (!wakeLock.hasSameProperties(flags, tag, ws, uid, pid)) { 541 // Update existing wake lock. This shouldn't happen but is harmless. 542 notifyWakeLockReleasedLocked(wakeLock); 543 wakeLock.updateProperties(flags, tag, ws, uid, pid); 544 notifyWakeLockAcquiredLocked(wakeLock); 545 } 546 } else { 547 wakeLock = new WakeLock(lock, flags, tag, ws, uid, pid); 548 try { 549 lock.linkToDeath(wakeLock, 0); 550 } catch (RemoteException ex) { 551 throw new IllegalArgumentException("Wake lock is already dead."); 552 } 553 notifyWakeLockAcquiredLocked(wakeLock); 554 mWakeLocks.add(wakeLock); 555 } 556 557 applyWakeLockFlagsOnAcquireLocked(wakeLock); 558 mDirty |= DIRTY_WAKE_LOCKS; 559 updatePowerStateLocked(); 560 } 561 } 562 563 private void applyWakeLockFlagsOnAcquireLocked(WakeLock wakeLock) { 564 if ((wakeLock.mFlags & PowerManager.ACQUIRE_CAUSES_WAKEUP) != 0) { 565 wakeUpNoUpdateLocked(SystemClock.uptimeMillis()); 566 } 567 } 568 569 @Override // Binder call 570 public void releaseWakeLock(IBinder lock, int flags) { 571 if (lock == null) { 572 throw new IllegalArgumentException("lock must not be null"); 573 } 574 575 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null); 576 577 final long ident = Binder.clearCallingIdentity(); 578 try { 579 releaseWakeLockInternal(lock, flags); 580 } finally { 581 Binder.restoreCallingIdentity(ident); 582 } 583 } 584 585 private void releaseWakeLockInternal(IBinder lock, int flags) { 586 synchronized (mLock) { 587 if (DEBUG_SPEW) { 588 Slog.d(TAG, "releaseWakeLockInternal: lock=" + Objects.hashCode(lock) 589 + ", flags=0x" + Integer.toHexString(flags)); 590 } 591 592 int index = findWakeLockIndexLocked(lock); 593 if (index < 0) { 594 return; 595 } 596 597 WakeLock wakeLock = mWakeLocks.get(index); 598 mWakeLocks.remove(index); 599 notifyWakeLockReleasedLocked(wakeLock); 600 wakeLock.mLock.unlinkToDeath(wakeLock, 0); 601 602 if ((flags & PowerManager.WAIT_FOR_PROXIMITY_NEGATIVE) != 0) { 603 mRequestWaitForNegativeProximity = true; 604 } 605 606 applyWakeLockFlagsOnReleaseLocked(wakeLock); 607 mDirty |= DIRTY_WAKE_LOCKS; 608 updatePowerStateLocked(); 609 } 610 } 611 612 private void handleWakeLockDeath(WakeLock wakeLock) { 613 synchronized (mLock) { 614 if (DEBUG_SPEW) { 615 Slog.d(TAG, "handleWakeLockDeath: lock=" + Objects.hashCode(wakeLock.mLock)); 616 } 617 618 int index = mWakeLocks.indexOf(wakeLock); 619 if (index < 0) { 620 return; 621 } 622 623 mWakeLocks.remove(index); 624 notifyWakeLockReleasedLocked(wakeLock); 625 626 applyWakeLockFlagsOnReleaseLocked(wakeLock); 627 mDirty |= DIRTY_WAKE_LOCKS; 628 updatePowerStateLocked(); 629 } 630 } 631 632 private void applyWakeLockFlagsOnReleaseLocked(WakeLock wakeLock) { 633 if ((wakeLock.mFlags & PowerManager.ON_AFTER_RELEASE) != 0) { 634 userActivityNoUpdateLocked(SystemClock.uptimeMillis(), 635 PowerManager.USER_ACTIVITY_EVENT_OTHER, 636 PowerManager.USER_ACTIVITY_FLAG_NO_CHANGE_LIGHTS, 637 wakeLock.mOwnerUid); 638 } 639 } 640 641 @Override // Binder call 642 public void updateWakeLockWorkSource(IBinder lock, WorkSource ws) { 643 if (lock == null) { 644 throw new IllegalArgumentException("lock must not be null"); 645 } 646 647 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WAKE_LOCK, null); 648 if (ws != null && ws.size() != 0) { 649 mContext.enforceCallingOrSelfPermission( 650 android.Manifest.permission.UPDATE_DEVICE_STATS, null); 651 } else { 652 ws = null; 653 } 654 655 final long ident = Binder.clearCallingIdentity(); 656 try { 657 updateWakeLockWorkSourceInternal(lock, ws); 658 } finally { 659 Binder.restoreCallingIdentity(ident); 660 } 661 } 662 663 private void updateWakeLockWorkSourceInternal(IBinder lock, WorkSource ws) { 664 synchronized (mLock) { 665 int index = findWakeLockIndexLocked(lock); 666 if (index < 0) { 667 throw new IllegalArgumentException("Wake lock not active"); 668 } 669 670 WakeLock wakeLock = mWakeLocks.get(index); 671 if (!wakeLock.hasSameWorkSource(ws)) { 672 notifyWakeLockReleasedLocked(wakeLock); 673 wakeLock.updateWorkSource(ws); 674 notifyWakeLockAcquiredLocked(wakeLock); 675 } 676 } 677 } 678 679 private int findWakeLockIndexLocked(IBinder lock) { 680 final int count = mWakeLocks.size(); 681 for (int i = 0; i < count; i++) { 682 if (mWakeLocks.get(i).mLock == lock) { 683 return i; 684 } 685 } 686 return -1; 687 } 688 689 private void notifyWakeLockAcquiredLocked(WakeLock wakeLock) { 690 if (mSystemReady) { 691 mNotifier.onWakeLockAcquired(wakeLock.mFlags, wakeLock.mTag, 692 wakeLock.mOwnerUid, wakeLock.mOwnerPid, wakeLock.mWorkSource); 693 } 694 } 695 696 private void notifyWakeLockReleasedLocked(WakeLock wakeLock) { 697 if (mSystemReady) { 698 mNotifier.onWakeLockReleased(wakeLock.mFlags, wakeLock.mTag, 699 wakeLock.mOwnerUid, wakeLock.mOwnerPid, wakeLock.mWorkSource); 700 } 701 } 702 703 @Override // Binder call 704 public boolean isWakeLockLevelSupported(int level) { 705 final long ident = Binder.clearCallingIdentity(); 706 try { 707 return isWakeLockLevelSupportedInternal(level); 708 } finally { 709 Binder.restoreCallingIdentity(ident); 710 } 711 } 712 713 private boolean isWakeLockLevelSupportedInternal(int level) { 714 synchronized (mLock) { 715 switch (level) { 716 case PowerManager.PARTIAL_WAKE_LOCK: 717 case PowerManager.SCREEN_DIM_WAKE_LOCK: 718 case PowerManager.SCREEN_BRIGHT_WAKE_LOCK: 719 case PowerManager.FULL_WAKE_LOCK: 720 return true; 721 722 case PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK: 723 return mSystemReady && mDisplayPowerController.isProximitySensorAvailable(); 724 725 default: 726 return false; 727 } 728 } 729 } 730 731 @Override // Binder call 732 public void userActivity(long eventTime, int event, int flags) { 733 final long now = SystemClock.uptimeMillis(); 734 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER) 735 != PackageManager.PERMISSION_GRANTED) { 736 // Once upon a time applications could call userActivity(). 737 // Now we require the DEVICE_POWER permission. Log a warning and ignore the 738 // request instead of throwing a SecurityException so we don't break old apps. 739 synchronized (mLock) { 740 if (now >= mLastWarningAboutUserActivityPermission + (5 * 60 * 1000)) { 741 mLastWarningAboutUserActivityPermission = now; 742 Slog.w(TAG, "Ignoring call to PowerManager.userActivity() because the " 743 + "caller does not have DEVICE_POWER permission. " 744 + "Please fix your app! " 745 + " pid=" + Binder.getCallingPid() 746 + " uid=" + Binder.getCallingUid()); 747 } 748 } 749 return; 750 } 751 752 if (eventTime > SystemClock.uptimeMillis()) { 753 throw new IllegalArgumentException("event time must not be in the future"); 754 } 755 756 final int uid = Binder.getCallingUid(); 757 final long ident = Binder.clearCallingIdentity(); 758 try { 759 userActivityInternal(eventTime, event, flags, uid); 760 } finally { 761 Binder.restoreCallingIdentity(ident); 762 } 763 } 764 765 // Called from native code. 766 private void userActivityFromNative(long eventTime, int event, int flags) { 767 userActivityInternal(eventTime, event, flags, Process.SYSTEM_UID); 768 } 769 770 private void userActivityInternal(long eventTime, int event, int flags, int uid) { 771 synchronized (mLock) { 772 if (userActivityNoUpdateLocked(eventTime, event, flags, uid)) { 773 updatePowerStateLocked(); 774 } 775 } 776 } 777 778 private boolean userActivityNoUpdateLocked(long eventTime, int event, int flags, int uid) { 779 if (DEBUG_SPEW) { 780 Slog.d(TAG, "userActivityNoUpdateLocked: eventTime=" + eventTime 781 + ", event=" + event + ", flags=0x" + Integer.toHexString(flags) 782 + ", uid=" + uid); 783 } 784 785 if (eventTime < mLastSleepTime || eventTime < mLastWakeTime 786 || mWakefulness == WAKEFULNESS_ASLEEP || !mBootCompleted || !mSystemReady) { 787 return false; 788 } 789 790 mNotifier.onUserActivity(event, uid); 791 792 if ((flags & PowerManager.USER_ACTIVITY_FLAG_NO_CHANGE_LIGHTS) != 0) { 793 if (eventTime > mLastUserActivityTimeNoChangeLights 794 && eventTime > mLastUserActivityTime) { 795 mLastUserActivityTimeNoChangeLights = eventTime; 796 mDirty |= DIRTY_USER_ACTIVITY; 797 return true; 798 } 799 } else { 800 if (eventTime > mLastUserActivityTime) { 801 mLastUserActivityTime = eventTime; 802 mDirty |= DIRTY_USER_ACTIVITY; 803 return true; 804 } 805 } 806 return false; 807 } 808 809 @Override // Binder call 810 public void wakeUp(long eventTime) { 811 if (eventTime > SystemClock.uptimeMillis()) { 812 throw new IllegalArgumentException("event time must not be in the future"); 813 } 814 815 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null); 816 817 final long ident = Binder.clearCallingIdentity(); 818 try { 819 wakeUpInternal(eventTime); 820 } finally { 821 Binder.restoreCallingIdentity(ident); 822 } 823 } 824 825 // Called from native code. 826 private void wakeUpFromNative(long eventTime) { 827 wakeUpInternal(eventTime); 828 } 829 830 private void wakeUpInternal(long eventTime) { 831 synchronized (mLock) { 832 if (wakeUpNoUpdateLocked(eventTime)) { 833 updatePowerStateLocked(); 834 } 835 } 836 } 837 838 private boolean wakeUpNoUpdateLocked(long eventTime) { 839 if (DEBUG_SPEW) { 840 Slog.d(TAG, "wakeUpNoUpdateLocked: eventTime=" + eventTime); 841 } 842 843 if (eventTime < mLastSleepTime || mWakefulness == WAKEFULNESS_AWAKE 844 || !mBootCompleted || !mSystemReady) { 845 return false; 846 } 847 848 switch (mWakefulness) { 849 case WAKEFULNESS_ASLEEP: 850 Slog.i(TAG, "Waking up from sleep..."); 851 sendPendingNotificationsLocked(); 852 mNotifier.onWakeUpStarted(); 853 mSendWakeUpFinishedNotificationWhenReady = true; 854 break; 855 case WAKEFULNESS_DREAMING: 856 Slog.i(TAG, "Waking up from dream..."); 857 break; 858 case WAKEFULNESS_NAPPING: 859 Slog.i(TAG, "Waking up from nap..."); 860 break; 861 } 862 863 mLastWakeTime = eventTime; 864 mWakefulness = WAKEFULNESS_AWAKE; 865 mDirty |= DIRTY_WAKEFULNESS; 866 867 userActivityNoUpdateLocked( 868 eventTime, PowerManager.USER_ACTIVITY_EVENT_OTHER, 0, Process.SYSTEM_UID); 869 return true; 870 } 871 872 @Override // Binder call 873 public void goToSleep(long eventTime, int reason) { 874 if (eventTime > SystemClock.uptimeMillis()) { 875 throw new IllegalArgumentException("event time must not be in the future"); 876 } 877 878 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null); 879 880 final long ident = Binder.clearCallingIdentity(); 881 try { 882 goToSleepInternal(eventTime, reason); 883 } finally { 884 Binder.restoreCallingIdentity(ident); 885 } 886 } 887 888 // Called from native code. 889 private void goToSleepFromNative(long eventTime, int reason) { 890 goToSleepInternal(eventTime, reason); 891 } 892 893 private void goToSleepInternal(long eventTime, int reason) { 894 synchronized (mLock) { 895 if (goToSleepNoUpdateLocked(eventTime, reason)) { 896 updatePowerStateLocked(); 897 } 898 } 899 } 900 901 private boolean goToSleepNoUpdateLocked(long eventTime, int reason) { 902 if (DEBUG_SPEW) { 903 Slog.d(TAG, "goToSleepNoUpdateLocked: eventTime=" + eventTime + ", reason=" + reason); 904 } 905 906 if (eventTime < mLastWakeTime || mWakefulness == WAKEFULNESS_ASLEEP 907 || !mBootCompleted || !mSystemReady) { 908 return false; 909 } 910 911 switch (reason) { 912 case PowerManager.GO_TO_SLEEP_REASON_DEVICE_ADMIN: 913 Slog.i(TAG, "Going to sleep due to device administration policy..."); 914 break; 915 case PowerManager.GO_TO_SLEEP_REASON_TIMEOUT: 916 Slog.i(TAG, "Going to sleep due to screen timeout..."); 917 break; 918 default: 919 Slog.i(TAG, "Going to sleep by user request..."); 920 reason = PowerManager.GO_TO_SLEEP_REASON_USER; 921 break; 922 } 923 924 sendPendingNotificationsLocked(); 925 mNotifier.onGoToSleepStarted(reason); 926 mSendGoToSleepFinishedNotificationWhenReady = true; 927 928 mLastSleepTime = eventTime; 929 mDirty |= DIRTY_WAKEFULNESS; 930 mWakefulness = WAKEFULNESS_ASLEEP; 931 932 // Report the number of wake locks that will be cleared by going to sleep. 933 int numWakeLocksCleared = 0; 934 final int numWakeLocks = mWakeLocks.size(); 935 for (int i = 0; i < numWakeLocks; i++) { 936 final WakeLock wakeLock = mWakeLocks.get(i); 937 switch (wakeLock.mFlags & PowerManager.WAKE_LOCK_LEVEL_MASK) { 938 case PowerManager.FULL_WAKE_LOCK: 939 case PowerManager.SCREEN_BRIGHT_WAKE_LOCK: 940 case PowerManager.SCREEN_DIM_WAKE_LOCK: 941 numWakeLocksCleared += 1; 942 break; 943 } 944 } 945 EventLog.writeEvent(EventLogTags.POWER_SLEEP_REQUESTED, numWakeLocksCleared); 946 return true; 947 } 948 949 @Override // Binder call 950 public void nap(long eventTime) { 951 if (eventTime > SystemClock.uptimeMillis()) { 952 throw new IllegalArgumentException("event time must not be in the future"); 953 } 954 955 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null); 956 957 final long ident = Binder.clearCallingIdentity(); 958 try { 959 napInternal(eventTime); 960 } finally { 961 Binder.restoreCallingIdentity(ident); 962 } 963 } 964 965 private void napInternal(long eventTime) { 966 synchronized (mLock) { 967 if (napNoUpdateLocked(eventTime)) { 968 updatePowerStateLocked(); 969 } 970 } 971 } 972 973 private boolean napNoUpdateLocked(long eventTime) { 974 if (DEBUG_SPEW) { 975 Slog.d(TAG, "napNoUpdateLocked: eventTime=" + eventTime); 976 } 977 978 if (eventTime < mLastWakeTime || mWakefulness != WAKEFULNESS_AWAKE 979 || !mBootCompleted || !mSystemReady) { 980 return false; 981 } 982 983 Slog.i(TAG, "Nap time..."); 984 985 mDirty |= DIRTY_WAKEFULNESS; 986 mWakefulness = WAKEFULNESS_NAPPING; 987 return true; 988 } 989 990 /** 991 * Updates the global power state based on dirty bits recorded in mDirty. 992 * 993 * This is the main function that performs power state transitions. 994 * We centralize them here so that we can recompute the power state completely 995 * each time something important changes, and ensure that we do it the same 996 * way each time. The point is to gather all of the transition logic here. 997 */ 998 private void updatePowerStateLocked() { 999 if (!mSystemReady || mDirty == 0) { 1000 return; 1001 } 1002 1003 // Phase 0: Basic state updates. 1004 updateIsPoweredLocked(mDirty); 1005 updateStayOnLocked(mDirty); 1006 1007 // Phase 1: Update wakefulness. 1008 // Loop because the wake lock and user activity computations are influenced 1009 // by changes in wakefulness. 1010 final long now = SystemClock.uptimeMillis(); 1011 int dirtyPhase2 = 0; 1012 for (;;) { 1013 int dirtyPhase1 = mDirty; 1014 dirtyPhase2 |= dirtyPhase1; 1015 mDirty = 0; 1016 1017 updateWakeLockSummaryLocked(dirtyPhase1); 1018 updateUserActivitySummaryLocked(now, dirtyPhase1); 1019 if (!updateWakefulnessLocked(dirtyPhase1)) { 1020 break; 1021 } 1022 } 1023 1024 // Phase 2: Update dreams and display power state. 1025 updateDreamLocked(dirtyPhase2); 1026 updateDisplayPowerStateLocked(dirtyPhase2); 1027 1028 // Phase 3: Send notifications, if needed. 1029 if (mDisplayReady) { 1030 sendPendingNotificationsLocked(); 1031 } 1032 1033 // Phase 4: Update suspend blocker. 1034 // Because we might release the last suspend blocker here, we need to make sure 1035 // we finished everything else first! 1036 updateSuspendBlockerLocked(); 1037 } 1038 1039 private void sendPendingNotificationsLocked() { 1040 if (mSendWakeUpFinishedNotificationWhenReady) { 1041 mSendWakeUpFinishedNotificationWhenReady = false; 1042 mNotifier.onWakeUpFinished(); 1043 } 1044 if (mSendGoToSleepFinishedNotificationWhenReady) { 1045 mSendGoToSleepFinishedNotificationWhenReady = false; 1046 mNotifier.onGoToSleepFinished(); 1047 } 1048 } 1049 1050 /** 1051 * Updates the value of mIsPowered. 1052 * Sets DIRTY_IS_POWERED if a change occurred. 1053 */ 1054 private void updateIsPoweredLocked(int dirty) { 1055 if ((dirty & DIRTY_BATTERY_STATE) != 0) { 1056 final boolean wasPowered = mIsPowered; 1057 final int oldPlugType = mPlugType; 1058 mIsPowered = mBatteryService.isPowered(BatteryManager.BATTERY_PLUGGED_ANY); 1059 mPlugType = mBatteryService.getPlugType(); 1060 1061 if (DEBUG) { 1062 Slog.d(TAG, "updateIsPoweredLocked: wasPowered=" + wasPowered 1063 + ", mIsPowered=" + mIsPowered 1064 + ", oldPlugType=" + oldPlugType 1065 + ", mPlugType=" + mPlugType); 1066 } 1067 1068 if (wasPowered != mIsPowered || oldPlugType != mPlugType) { 1069 mDirty |= DIRTY_IS_POWERED; 1070 1071 // Treat plugging and unplugging the devices as a user activity. 1072 // Users find it disconcerting when they plug or unplug the device 1073 // and it shuts off right away. 1074 // Some devices also wake the device when plugged or unplugged because 1075 // they don't have a charging LED. 1076 final long now = SystemClock.uptimeMillis(); 1077 if (shouldWakeUpWhenPluggedOrUnpluggedLocked(wasPowered, oldPlugType)) { 1078 wakeUpNoUpdateLocked(now); 1079 } 1080 userActivityNoUpdateLocked( 1081 now, PowerManager.USER_ACTIVITY_EVENT_OTHER, 0, Process.SYSTEM_UID); 1082 } 1083 } 1084 } 1085 1086 private boolean shouldWakeUpWhenPluggedOrUnpluggedLocked(boolean wasPowered, int oldPlugType) { 1087 // Don't wake when powered unless configured to do so. 1088 if (!mWakeUpWhenPluggedOrUnpluggedConfig) { 1089 return false; 1090 } 1091 1092 // FIXME: Need more accurate detection of wireless chargers. 1093 // 1094 // We are unable to accurately detect whether the device is resting on the 1095 // charger unless it is actually receiving power. This causes us some grief 1096 // because the device might not appear to be plugged into the wireless charger 1097 // unless it actually charging. 1098 // 1099 // To avoid spuriously waking the screen, we apply a special policy to 1100 // wireless chargers. 1101 // 1102 // 1. Don't wake the device when unplugged from wireless charger because 1103 // it might be that the device is still resting on the wireless charger 1104 // but is not receiving power anymore because the battery is full. 1105 // 1106 // 2. Don't wake the device when plugged into a wireless charger if the 1107 // battery already appears to be mostly full. This situation may indicate 1108 // that the device was resting on the charger the whole time and simply 1109 // wasn't receiving power because the battery was full. We can't tell 1110 // whether the device was just placed on the charger or whether it has 1111 // been there for half of the night slowly discharging until it hit 1112 // the point where it needed to start charging again. 1113 if (wasPowered && !mIsPowered 1114 && oldPlugType == BatteryManager.BATTERY_PLUGGED_WIRELESS) { 1115 return false; 1116 } 1117 if (!wasPowered && mIsPowered 1118 && mPlugType == BatteryManager.BATTERY_PLUGGED_WIRELESS 1119 && mBatteryService.getBatteryLevel() >= 1120 WIRELESS_CHARGER_TURN_ON_BATTERY_LEVEL_LIMIT) { 1121 return false; 1122 } 1123 1124 // If already dreaming and becoming powered, then don't wake. 1125 if (mIsPowered && (mWakefulness == WAKEFULNESS_NAPPING 1126 || mWakefulness == WAKEFULNESS_DREAMING)) { 1127 return false; 1128 } 1129 1130 // Otherwise wake up! 1131 return true; 1132 } 1133 1134 /** 1135 * Updates the value of mStayOn. 1136 * Sets DIRTY_STAY_ON if a change occurred. 1137 */ 1138 private void updateStayOnLocked(int dirty) { 1139 if ((dirty & (DIRTY_BATTERY_STATE | DIRTY_SETTINGS)) != 0) { 1140 final boolean wasStayOn = mStayOn; 1141 if (mStayOnWhilePluggedInSetting != 0 1142 && !isMaximumScreenOffTimeoutFromDeviceAdminEnforcedLocked()) { 1143 mStayOn = mBatteryService.isPowered(mStayOnWhilePluggedInSetting); 1144 } else { 1145 mStayOn = false; 1146 } 1147 1148 if (mStayOn != wasStayOn) { 1149 mDirty |= DIRTY_STAY_ON; 1150 } 1151 } 1152 } 1153 1154 /** 1155 * Updates the value of mWakeLockSummary to summarize the state of all active wake locks. 1156 * Note that most wake-locks are ignored when the system is asleep. 1157 * 1158 * This function must have no other side-effects. 1159 */ 1160 private void updateWakeLockSummaryLocked(int dirty) { 1161 if ((dirty & (DIRTY_WAKE_LOCKS | DIRTY_WAKEFULNESS)) != 0) { 1162 mWakeLockSummary = 0; 1163 1164 final int numWakeLocks = mWakeLocks.size(); 1165 for (int i = 0; i < numWakeLocks; i++) { 1166 final WakeLock wakeLock = mWakeLocks.get(i); 1167 switch (wakeLock.mFlags & PowerManager.WAKE_LOCK_LEVEL_MASK) { 1168 case PowerManager.PARTIAL_WAKE_LOCK: 1169 mWakeLockSummary |= WAKE_LOCK_CPU; 1170 break; 1171 case PowerManager.FULL_WAKE_LOCK: 1172 if (mWakefulness != WAKEFULNESS_ASLEEP) { 1173 mWakeLockSummary |= WAKE_LOCK_CPU 1174 | WAKE_LOCK_SCREEN_BRIGHT | WAKE_LOCK_BUTTON_BRIGHT; 1175 } 1176 break; 1177 case PowerManager.SCREEN_BRIGHT_WAKE_LOCK: 1178 if (mWakefulness != WAKEFULNESS_ASLEEP) { 1179 mWakeLockSummary |= WAKE_LOCK_CPU | WAKE_LOCK_SCREEN_BRIGHT; 1180 } 1181 break; 1182 case PowerManager.SCREEN_DIM_WAKE_LOCK: 1183 if (mWakefulness != WAKEFULNESS_ASLEEP) { 1184 mWakeLockSummary |= WAKE_LOCK_CPU | WAKE_LOCK_SCREEN_DIM; 1185 } 1186 break; 1187 case PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK: 1188 if (mWakefulness != WAKEFULNESS_ASLEEP) { 1189 mWakeLockSummary |= WAKE_LOCK_CPU | WAKE_LOCK_PROXIMITY_SCREEN_OFF; 1190 } 1191 break; 1192 } 1193 } 1194 1195 if (DEBUG_SPEW) { 1196 Slog.d(TAG, "updateWakeLockSummaryLocked: mWakefulness=" 1197 + wakefulnessToString(mWakefulness) 1198 + ", mWakeLockSummary=0x" + Integer.toHexString(mWakeLockSummary)); 1199 } 1200 } 1201 } 1202 1203 /** 1204 * Updates the value of mUserActivitySummary to summarize the user requested 1205 * state of the system such as whether the screen should be bright or dim. 1206 * Note that user activity is ignored when the system is asleep. 1207 * 1208 * This function must have no other side-effects. 1209 */ 1210 private void updateUserActivitySummaryLocked(long now, int dirty) { 1211 // Update the status of the user activity timeout timer. 1212 if ((dirty & (DIRTY_USER_ACTIVITY | DIRTY_WAKEFULNESS | DIRTY_SETTINGS)) != 0) { 1213 mHandler.removeMessages(MSG_USER_ACTIVITY_TIMEOUT); 1214 1215 long nextTimeout = 0; 1216 if (mWakefulness != WAKEFULNESS_ASLEEP) { 1217 final int screenOffTimeout = getScreenOffTimeoutLocked(); 1218 final int screenDimDuration = getScreenDimDurationLocked(screenOffTimeout); 1219 1220 mUserActivitySummary = 0; 1221 if (mLastUserActivityTime >= mLastWakeTime) { 1222 nextTimeout = mLastUserActivityTime 1223 + screenOffTimeout - screenDimDuration; 1224 if (now < nextTimeout) { 1225 mUserActivitySummary |= USER_ACTIVITY_SCREEN_BRIGHT; 1226 } else { 1227 nextTimeout = mLastUserActivityTime + screenOffTimeout; 1228 if (now < nextTimeout) { 1229 mUserActivitySummary |= USER_ACTIVITY_SCREEN_DIM; 1230 } 1231 } 1232 } 1233 if (mUserActivitySummary == 0 1234 && mLastUserActivityTimeNoChangeLights >= mLastWakeTime) { 1235 nextTimeout = mLastUserActivityTimeNoChangeLights + screenOffTimeout; 1236 if (now < nextTimeout 1237 && mDisplayPowerRequest.screenState 1238 != DisplayPowerRequest.SCREEN_STATE_OFF) { 1239 mUserActivitySummary = mDisplayPowerRequest.screenState 1240 == DisplayPowerRequest.SCREEN_STATE_BRIGHT ? 1241 USER_ACTIVITY_SCREEN_BRIGHT : USER_ACTIVITY_SCREEN_DIM; 1242 } 1243 } 1244 if (mUserActivitySummary != 0) { 1245 Message msg = mHandler.obtainMessage(MSG_USER_ACTIVITY_TIMEOUT); 1246 msg.setAsynchronous(true); 1247 mHandler.sendMessageAtTime(msg, nextTimeout); 1248 } 1249 } else { 1250 mUserActivitySummary = 0; 1251 } 1252 1253 if (DEBUG_SPEW) { 1254 Slog.d(TAG, "updateUserActivitySummaryLocked: mWakefulness=" 1255 + wakefulnessToString(mWakefulness) 1256 + ", mUserActivitySummary=0x" + Integer.toHexString(mUserActivitySummary) 1257 + ", nextTimeout=" + TimeUtils.formatUptime(nextTimeout)); 1258 } 1259 } 1260 } 1261 1262 /** 1263 * Called when a user activity timeout has occurred. 1264 * Simply indicates that something about user activity has changed so that the new 1265 * state can be recomputed when the power state is updated. 1266 * 1267 * This function must have no other side-effects besides setting the dirty 1268 * bit and calling update power state. Wakefulness transitions are handled elsewhere. 1269 */ 1270 private void handleUserActivityTimeout() { // runs on handler thread 1271 synchronized (mLock) { 1272 if (DEBUG_SPEW) { 1273 Slog.d(TAG, "handleUserActivityTimeout"); 1274 } 1275 1276 mDirty |= DIRTY_USER_ACTIVITY; 1277 updatePowerStateLocked(); 1278 } 1279 } 1280 1281 private int getScreenOffTimeoutLocked() { 1282 int timeout = mScreenOffTimeoutSetting; 1283 if (isMaximumScreenOffTimeoutFromDeviceAdminEnforcedLocked()) { 1284 timeout = Math.min(timeout, mMaximumScreenOffTimeoutFromDeviceAdmin); 1285 } 1286 if (mUserActivityTimeoutOverrideFromWindowManager >= 0) { 1287 timeout = (int)Math.min(timeout, mUserActivityTimeoutOverrideFromWindowManager); 1288 } 1289 return Math.max(timeout, MINIMUM_SCREEN_OFF_TIMEOUT); 1290 } 1291 1292 private int getScreenDimDurationLocked(int screenOffTimeout) { 1293 return Math.min(SCREEN_DIM_DURATION, 1294 (int)(screenOffTimeout * MAXIMUM_SCREEN_DIM_RATIO)); 1295 } 1296 1297 /** 1298 * Updates the wakefulness of the device. 1299 * 1300 * This is the function that decides whether the device should start napping 1301 * based on the current wake locks and user activity state. It may modify mDirty 1302 * if the wakefulness changes. 1303 * 1304 * Returns true if the wakefulness changed and we need to restart power state calculation. 1305 */ 1306 private boolean updateWakefulnessLocked(int dirty) { 1307 boolean changed = false; 1308 if ((dirty & (DIRTY_WAKE_LOCKS | DIRTY_USER_ACTIVITY | DIRTY_BOOT_COMPLETED 1309 | DIRTY_WAKEFULNESS | DIRTY_STAY_ON | DIRTY_PROXIMITY_POSITIVE)) != 0) { 1310 if (mWakefulness == WAKEFULNESS_AWAKE && isItBedTimeYetLocked()) { 1311 if (DEBUG_SPEW) { 1312 Slog.d(TAG, "updateWakefulnessLocked: Bed time..."); 1313 } 1314 final long time = SystemClock.uptimeMillis(); 1315 if (mDreamsActivateOnSleepSetting) { 1316 changed = napNoUpdateLocked(time); 1317 } else { 1318 changed = goToSleepNoUpdateLocked(time, 1319 PowerManager.GO_TO_SLEEP_REASON_TIMEOUT); 1320 } 1321 } 1322 } 1323 return changed; 1324 } 1325 1326 /** 1327 * Returns true if the device should go to sleep now. 1328 * Also used when exiting a dream to determine whether we should go back 1329 * to being fully awake or else go to sleep for good. 1330 */ 1331 private boolean isItBedTimeYetLocked() { 1332 return mBootCompleted && !isBeingKeptAwakeLocked(); 1333 } 1334 1335 /** 1336 * Returns true if the device is being kept awake by a wake lock, user activity 1337 * or the stay on while powered setting. 1338 */ 1339 private boolean isBeingKeptAwakeLocked() { 1340 return mStayOn 1341 || mProximityPositive 1342 || (mWakeLockSummary & (WAKE_LOCK_SCREEN_BRIGHT | WAKE_LOCK_SCREEN_DIM)) != 0 1343 || (mUserActivitySummary & (USER_ACTIVITY_SCREEN_BRIGHT 1344 | USER_ACTIVITY_SCREEN_DIM)) != 0; 1345 } 1346 1347 /** 1348 * Determines whether to post a message to the sandman to update the dream state. 1349 */ 1350 private void updateDreamLocked(int dirty) { 1351 if ((dirty & (DIRTY_WAKEFULNESS 1352 | DIRTY_USER_ACTIVITY 1353 | DIRTY_WAKE_LOCKS 1354 | DIRTY_BOOT_COMPLETED 1355 | DIRTY_SETTINGS 1356 | DIRTY_IS_POWERED 1357 | DIRTY_STAY_ON 1358 | DIRTY_PROXIMITY_POSITIVE 1359 | DIRTY_BATTERY_STATE)) != 0) { 1360 scheduleSandmanLocked(); 1361 } 1362 } 1363 1364 private void scheduleSandmanLocked() { 1365 if (!mSandmanScheduled) { 1366 mSandmanScheduled = true; 1367 Message msg = mHandler.obtainMessage(MSG_SANDMAN); 1368 msg.setAsynchronous(true); 1369 mHandler.sendMessage(msg); 1370 } 1371 } 1372 1373 /** 1374 * Called when the device enters or exits a napping or dreaming state. 1375 * 1376 * We do this asynchronously because we must call out of the power manager to start 1377 * the dream and we don't want to hold our lock while doing so. There is a risk that 1378 * the device will wake or go to sleep in the meantime so we have to handle that case. 1379 */ 1380 private void handleSandman() { // runs on handler thread 1381 // Handle preconditions. 1382 boolean startDreaming = false; 1383 synchronized (mLock) { 1384 mSandmanScheduled = false; 1385 boolean canDream = canDreamLocked(); 1386 if (DEBUG_SPEW) { 1387 Log.d(TAG, "handleSandman: canDream=" + canDream 1388 + ", mWakefulness=" + wakefulnessToString(mWakefulness)); 1389 } 1390 1391 if (canDream && mWakefulness == WAKEFULNESS_NAPPING) { 1392 startDreaming = true; 1393 } 1394 } 1395 1396 // Start dreaming if needed. 1397 // We only control the dream on the handler thread, so we don't need to worry about 1398 // concurrent attempts to start or stop the dream. 1399 boolean isDreaming = false; 1400 if (mDreamManager != null) { 1401 if (startDreaming) { 1402 mDreamManager.startDream(); 1403 } 1404 isDreaming = mDreamManager.isDreaming(); 1405 } 1406 1407 // Update dream state. 1408 // We might need to stop the dream again if the preconditions changed. 1409 boolean continueDreaming = false; 1410 synchronized (mLock) { 1411 if (isDreaming && canDreamLocked()) { 1412 if (mWakefulness == WAKEFULNESS_NAPPING) { 1413 mWakefulness = WAKEFULNESS_DREAMING; 1414 mDirty |= DIRTY_WAKEFULNESS; 1415 updatePowerStateLocked(); 1416 continueDreaming = true; 1417 } else if (mWakefulness == WAKEFULNESS_DREAMING) { 1418 continueDreaming = true; 1419 } 1420 } 1421 if (!continueDreaming) { 1422 handleDreamFinishedLocked(); 1423 } 1424 } 1425 1426 // Stop dreaming if needed. 1427 // It's possible that something else changed to make us need to start the dream again. 1428 // If so, then the power manager will have posted another message to the handler 1429 // to take care of it later. 1430 if (mDreamManager != null) { 1431 if (!continueDreaming) { 1432 mDreamManager.stopDream(); 1433 } 1434 } 1435 } 1436 1437 /** 1438 * Returns true if the device is allowed to dream in its current state 1439 * assuming that it is currently napping or dreaming. 1440 */ 1441 private boolean canDreamLocked() { 1442 return mDreamsSupportedConfig 1443 && mDreamsEnabledSetting 1444 && mDisplayPowerRequest.screenState != DisplayPowerRequest.SCREEN_STATE_OFF 1445 && mBootCompleted 1446 && (mIsPowered || isBeingKeptAwakeLocked()); 1447 } 1448 1449 /** 1450 * Called when a dream is ending to figure out what to do next. 1451 */ 1452 private void handleDreamFinishedLocked() { 1453 if (mWakefulness == WAKEFULNESS_NAPPING 1454 || mWakefulness == WAKEFULNESS_DREAMING) { 1455 if (isItBedTimeYetLocked()) { 1456 goToSleepNoUpdateLocked(SystemClock.uptimeMillis(), 1457 PowerManager.GO_TO_SLEEP_REASON_TIMEOUT); 1458 updatePowerStateLocked(); 1459 } else { 1460 wakeUpNoUpdateLocked(SystemClock.uptimeMillis()); 1461 updatePowerStateLocked(); 1462 } 1463 } 1464 } 1465 1466 private void handleScreenOnBlockerReleased() { 1467 synchronized (mLock) { 1468 mDirty |= DIRTY_SCREEN_ON_BLOCKER_RELEASED; 1469 updatePowerStateLocked(); 1470 } 1471 } 1472 1473 /** 1474 * Updates the display power state asynchronously. 1475 * When the update is finished, mDisplayReady will be set to true. The display 1476 * controller posts a message to tell us when the actual display power state 1477 * has been updated so we come back here to double-check and finish up. 1478 * 1479 * This function recalculates the display power state each time. 1480 */ 1481 private void updateDisplayPowerStateLocked(int dirty) { 1482 if ((dirty & (DIRTY_WAKE_LOCKS | DIRTY_USER_ACTIVITY | DIRTY_WAKEFULNESS 1483 | DIRTY_ACTUAL_DISPLAY_POWER_STATE_UPDATED | DIRTY_BOOT_COMPLETED 1484 | DIRTY_SETTINGS | DIRTY_SCREEN_ON_BLOCKER_RELEASED)) != 0) { 1485 int newScreenState = getDesiredScreenPowerStateLocked(); 1486 if (newScreenState != mDisplayPowerRequest.screenState) { 1487 if (newScreenState == DisplayPowerRequest.SCREEN_STATE_OFF 1488 && mDisplayPowerRequest.screenState 1489 != DisplayPowerRequest.SCREEN_STATE_OFF) { 1490 mLastScreenOffEventElapsedRealTime = SystemClock.elapsedRealtime(); 1491 } 1492 1493 mDisplayPowerRequest.screenState = newScreenState; 1494 nativeSetPowerState( 1495 newScreenState != DisplayPowerRequest.SCREEN_STATE_OFF, 1496 newScreenState == DisplayPowerRequest.SCREEN_STATE_BRIGHT); 1497 } 1498 1499 int screenBrightness = mScreenBrightnessSettingDefault; 1500 float screenAutoBrightnessAdjustment = 0.0f; 1501 boolean autoBrightness = (mScreenBrightnessModeSetting == 1502 Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC); 1503 if (isValidBrightness(mScreenBrightnessOverrideFromWindowManager)) { 1504 screenBrightness = mScreenBrightnessOverrideFromWindowManager; 1505 autoBrightness = false; 1506 } else if (isValidBrightness(mTemporaryScreenBrightnessSettingOverride)) { 1507 screenBrightness = mTemporaryScreenBrightnessSettingOverride; 1508 } else if (isValidBrightness(mScreenBrightnessSetting)) { 1509 screenBrightness = mScreenBrightnessSetting; 1510 } 1511 if (autoBrightness) { 1512 screenBrightness = mScreenBrightnessSettingDefault; 1513 if (isValidAutoBrightnessAdjustment( 1514 mTemporaryScreenAutoBrightnessAdjustmentSettingOverride)) { 1515 screenAutoBrightnessAdjustment = 1516 mTemporaryScreenAutoBrightnessAdjustmentSettingOverride; 1517 } else if (isValidAutoBrightnessAdjustment( 1518 mScreenAutoBrightnessAdjustmentSetting)) { 1519 screenAutoBrightnessAdjustment = mScreenAutoBrightnessAdjustmentSetting; 1520 } 1521 } 1522 screenBrightness = Math.max(Math.min(screenBrightness, 1523 mScreenBrightnessSettingMaximum), mScreenBrightnessSettingMinimum); 1524 screenAutoBrightnessAdjustment = Math.max(Math.min( 1525 screenAutoBrightnessAdjustment, 1.0f), -1.0f); 1526 mDisplayPowerRequest.screenBrightness = screenBrightness; 1527 mDisplayPowerRequest.screenAutoBrightnessAdjustment = 1528 screenAutoBrightnessAdjustment; 1529 mDisplayPowerRequest.useAutoBrightness = autoBrightness; 1530 1531 mDisplayPowerRequest.useProximitySensor = shouldUseProximitySensorLocked(); 1532 1533 mDisplayPowerRequest.blockScreenOn = mScreenOnBlocker.isHeld(); 1534 1535 mDisplayReady = mDisplayPowerController.requestPowerState(mDisplayPowerRequest, 1536 mRequestWaitForNegativeProximity); 1537 mRequestWaitForNegativeProximity = false; 1538 1539 if (DEBUG_SPEW) { 1540 Slog.d(TAG, "updateScreenStateLocked: mDisplayReady=" + mDisplayReady 1541 + ", newScreenState=" + newScreenState 1542 + ", mWakefulness=" + mWakefulness 1543 + ", mWakeLockSummary=0x" + Integer.toHexString(mWakeLockSummary) 1544 + ", mUserActivitySummary=0x" + Integer.toHexString(mUserActivitySummary) 1545 + ", mBootCompleted=" + mBootCompleted); 1546 } 1547 } 1548 } 1549 1550 private static boolean isValidBrightness(int value) { 1551 return value >= 0 && value <= 255; 1552 } 1553 1554 private static boolean isValidAutoBrightnessAdjustment(float value) { 1555 // Handles NaN by always returning false. 1556 return value >= -1.0f && value <= 1.0f; 1557 } 1558 1559 private int getDesiredScreenPowerStateLocked() { 1560 if (mWakefulness == WAKEFULNESS_ASLEEP) { 1561 return DisplayPowerRequest.SCREEN_STATE_OFF; 1562 } 1563 1564 if ((mWakeLockSummary & WAKE_LOCK_SCREEN_BRIGHT) != 0 1565 || (mUserActivitySummary & USER_ACTIVITY_SCREEN_BRIGHT) != 0 1566 || !mBootCompleted) { 1567 return DisplayPowerRequest.SCREEN_STATE_BRIGHT; 1568 } 1569 1570 return DisplayPowerRequest.SCREEN_STATE_DIM; 1571 } 1572 1573 private final DisplayPowerController.Callbacks mDisplayPowerControllerCallbacks = 1574 new DisplayPowerController.Callbacks() { 1575 @Override 1576 public void onStateChanged() { 1577 mDirty |= DIRTY_ACTUAL_DISPLAY_POWER_STATE_UPDATED; 1578 updatePowerStateLocked(); 1579 } 1580 1581 @Override 1582 public void onProximityPositive() { 1583 mProximityPositive = true; 1584 mDirty |= DIRTY_PROXIMITY_POSITIVE; 1585 updatePowerStateLocked(); 1586 } 1587 1588 @Override 1589 public void onProximityNegative() { 1590 mProximityPositive = false; 1591 mDirty |= DIRTY_PROXIMITY_POSITIVE; 1592 userActivityNoUpdateLocked(SystemClock.uptimeMillis(), 1593 PowerManager.USER_ACTIVITY_EVENT_OTHER, 0, Process.SYSTEM_UID); 1594 updatePowerStateLocked(); 1595 } 1596 }; 1597 1598 private boolean shouldUseProximitySensorLocked() { 1599 return (mWakeLockSummary & WAKE_LOCK_PROXIMITY_SCREEN_OFF) != 0; 1600 } 1601 1602 /** 1603 * Updates the suspend blocker that keeps the CPU alive. 1604 * 1605 * This function must have no other side-effects. 1606 */ 1607 private void updateSuspendBlockerLocked() { 1608 boolean wantCpu = isCpuNeededLocked(); 1609 if (wantCpu != mHoldingWakeLockSuspendBlocker) { 1610 mHoldingWakeLockSuspendBlocker = wantCpu; 1611 if (wantCpu) { 1612 if (DEBUG) { 1613 Slog.d(TAG, "updateSuspendBlockerLocked: Acquiring suspend blocker."); 1614 } 1615 mWakeLockSuspendBlocker.acquire(); 1616 } else { 1617 if (DEBUG) { 1618 Slog.d(TAG, "updateSuspendBlockerLocked: Releasing suspend blocker."); 1619 } 1620 mWakeLockSuspendBlocker.release(); 1621 } 1622 } 1623 } 1624 1625 private boolean isCpuNeededLocked() { 1626 return !mBootCompleted 1627 || mWakeLockSummary != 0 1628 || mUserActivitySummary != 0 1629 || mDisplayPowerRequest.screenState != DisplayPowerRequest.SCREEN_STATE_OFF 1630 || !mDisplayReady; 1631 } 1632 1633 @Override // Binder call 1634 public boolean isScreenOn() { 1635 final long ident = Binder.clearCallingIdentity(); 1636 try { 1637 return isScreenOnInternal(); 1638 } finally { 1639 Binder.restoreCallingIdentity(ident); 1640 } 1641 } 1642 1643 private boolean isScreenOnInternal() { 1644 synchronized (mLock) { 1645 return !mSystemReady 1646 || mDisplayPowerRequest.screenState != DisplayPowerRequest.SCREEN_STATE_OFF; 1647 } 1648 } 1649 1650 private void handleBatteryStateChangedLocked() { 1651 mDirty |= DIRTY_BATTERY_STATE; 1652 updatePowerStateLocked(); 1653 } 1654 1655 private void handleBootCompletedLocked() { 1656 final long now = SystemClock.uptimeMillis(); 1657 mBootCompleted = true; 1658 mDirty |= DIRTY_BOOT_COMPLETED; 1659 userActivityNoUpdateLocked( 1660 now, PowerManager.USER_ACTIVITY_EVENT_OTHER, 0, Process.SYSTEM_UID); 1661 updatePowerStateLocked(); 1662 } 1663 1664 /** 1665 * Reboot the device, passing 'reason' (may be null) 1666 * to the underlying __reboot system call. Should not return. 1667 */ 1668 @Override // Binder call 1669 public void reboot(boolean confirm, String reason, boolean wait) { 1670 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.REBOOT, null); 1671 1672 final long ident = Binder.clearCallingIdentity(); 1673 try { 1674 rebootInternal(false, confirm, reason, wait); 1675 } finally { 1676 Binder.restoreCallingIdentity(ident); 1677 } 1678 } 1679 1680 /** 1681 * Shutdown the devic, passing 'reason' (may be null) 1682 * to the underlying __reboot system call. Should not return. 1683 */ 1684 @Override // Binder call 1685 public void shutdown(boolean confirm, boolean wait) { 1686 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.REBOOT, null); 1687 1688 final long ident = Binder.clearCallingIdentity(); 1689 try { 1690 rebootInternal(true, confirm, null, wait); 1691 } finally { 1692 Binder.restoreCallingIdentity(ident); 1693 } 1694 } 1695 1696 private void rebootInternal(final boolean shutdown, final boolean confirm, 1697 final String reason, boolean wait) { 1698 if (mHandler == null || !mSystemReady) { 1699 throw new IllegalStateException("Too early to call reboot()"); 1700 } 1701 1702 Runnable runnable = new Runnable() { 1703 public void run() { 1704 synchronized (this) { 1705 if (shutdown) { 1706 ShutdownThread.shutdown(mContext, confirm); 1707 } else { 1708 ShutdownThread.reboot(mContext, reason, confirm); 1709 } 1710 } 1711 } 1712 }; 1713 1714 // ShutdownThread must run on a looper capable of displaying the UI. 1715 Message msg = Message.obtain(mHandler, runnable); 1716 msg.setAsynchronous(true); 1717 mHandler.sendMessage(msg); 1718 1719 // PowerManager.reboot() is documented not to return so just wait for the inevitable. 1720 if (wait) { 1721 synchronized (runnable) { 1722 while (true) { 1723 try { 1724 runnable.wait(); 1725 } catch (InterruptedException e) { 1726 } 1727 } 1728 } 1729 } 1730 } 1731 1732 /** 1733 * Crash the runtime (causing a complete restart of the Android framework). 1734 * Requires REBOOT permission. Mostly for testing. Should not return. 1735 */ 1736 @Override // Binder call 1737 public void crash(String message) { 1738 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.REBOOT, null); 1739 1740 final long ident = Binder.clearCallingIdentity(); 1741 try { 1742 crashInternal(message); 1743 } finally { 1744 Binder.restoreCallingIdentity(ident); 1745 } 1746 } 1747 1748 private void crashInternal(final String message) { 1749 Thread t = new Thread("PowerManagerService.crash()") { 1750 public void run() { 1751 throw new RuntimeException(message); 1752 } 1753 }; 1754 try { 1755 t.start(); 1756 t.join(); 1757 } catch (InterruptedException e) { 1758 Log.wtf(TAG, e); 1759 } 1760 } 1761 1762 /** 1763 * Set the setting that determines whether the device stays on when plugged in. 1764 * The argument is a bit string, with each bit specifying a power source that, 1765 * when the device is connected to that source, causes the device to stay on. 1766 * See {@link android.os.BatteryManager} for the list of power sources that 1767 * can be specified. Current values include {@link android.os.BatteryManager#BATTERY_PLUGGED_AC} 1768 * and {@link android.os.BatteryManager#BATTERY_PLUGGED_USB} 1769 * 1770 * Used by "adb shell svc power stayon ..." 1771 * 1772 * @param val an {@code int} containing the bits that specify which power sources 1773 * should cause the device to stay on. 1774 */ 1775 @Override // Binder call 1776 public void setStayOnSetting(int val) { 1777 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.WRITE_SETTINGS, null); 1778 1779 final long ident = Binder.clearCallingIdentity(); 1780 try { 1781 setStayOnSettingInternal(val); 1782 } finally { 1783 Binder.restoreCallingIdentity(ident); 1784 } 1785 } 1786 1787 private void setStayOnSettingInternal(int val) { 1788 Settings.Global.putInt(mContext.getContentResolver(), 1789 Settings.Global.STAY_ON_WHILE_PLUGGED_IN, val); 1790 } 1791 1792 /** 1793 * Used by device administration to set the maximum screen off timeout. 1794 * 1795 * This method must only be called by the device administration policy manager. 1796 */ 1797 @Override // Binder call 1798 public void setMaximumScreenOffTimeoutFromDeviceAdmin(int timeMs) { 1799 final long ident = Binder.clearCallingIdentity(); 1800 try { 1801 setMaximumScreenOffTimeoutFromDeviceAdminInternal(timeMs); 1802 } finally { 1803 Binder.restoreCallingIdentity(ident); 1804 } 1805 } 1806 1807 private void setMaximumScreenOffTimeoutFromDeviceAdminInternal(int timeMs) { 1808 synchronized (mLock) { 1809 mMaximumScreenOffTimeoutFromDeviceAdmin = timeMs; 1810 mDirty |= DIRTY_SETTINGS; 1811 updatePowerStateLocked(); 1812 } 1813 } 1814 1815 private boolean isMaximumScreenOffTimeoutFromDeviceAdminEnforcedLocked() { 1816 return mMaximumScreenOffTimeoutFromDeviceAdmin >= 0 1817 && mMaximumScreenOffTimeoutFromDeviceAdmin < Integer.MAX_VALUE; 1818 } 1819 1820 /** 1821 * Used by the phone application to make the attention LED flash when ringing. 1822 */ 1823 @Override // Binder call 1824 public void setAttentionLight(boolean on, int color) { 1825 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null); 1826 1827 final long ident = Binder.clearCallingIdentity(); 1828 try { 1829 setAttentionLightInternal(on, color); 1830 } finally { 1831 Binder.restoreCallingIdentity(ident); 1832 } 1833 } 1834 1835 private void setAttentionLightInternal(boolean on, int color) { 1836 LightsService.Light light; 1837 synchronized (mLock) { 1838 if (!mSystemReady) { 1839 return; 1840 } 1841 light = mAttentionLight; 1842 } 1843 1844 // Control light outside of lock. 1845 light.setFlashing(color, LightsService.LIGHT_FLASH_HARDWARE, (on ? 3 : 0), 0); 1846 } 1847 1848 /** 1849 * Used by the Watchdog. 1850 */ 1851 public long timeSinceScreenWasLastOn() { 1852 synchronized (mLock) { 1853 if (mDisplayPowerRequest.screenState != DisplayPowerRequest.SCREEN_STATE_OFF) { 1854 return 0; 1855 } 1856 return SystemClock.elapsedRealtime() - mLastScreenOffEventElapsedRealTime; 1857 } 1858 } 1859 1860 /** 1861 * Used by the window manager to override the screen brightness based on the 1862 * current foreground activity. 1863 * 1864 * This method must only be called by the window manager. 1865 * 1866 * @param brightness The overridden brightness, or -1 to disable the override. 1867 */ 1868 public void setScreenBrightnessOverrideFromWindowManager(int brightness) { 1869 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null); 1870 1871 final long ident = Binder.clearCallingIdentity(); 1872 try { 1873 setScreenBrightnessOverrideFromWindowManagerInternal(brightness); 1874 } finally { 1875 Binder.restoreCallingIdentity(ident); 1876 } 1877 } 1878 1879 private void setScreenBrightnessOverrideFromWindowManagerInternal(int brightness) { 1880 synchronized (mLock) { 1881 if (mScreenBrightnessOverrideFromWindowManager != brightness) { 1882 mScreenBrightnessOverrideFromWindowManager = brightness; 1883 mDirty |= DIRTY_SETTINGS; 1884 updatePowerStateLocked(); 1885 } 1886 } 1887 } 1888 1889 /** 1890 * Used by the window manager to override the button brightness based on the 1891 * current foreground activity. 1892 * 1893 * This method must only be called by the window manager. 1894 * 1895 * @param brightness The overridden brightness, or -1 to disable the override. 1896 */ 1897 public void setButtonBrightnessOverrideFromWindowManager(int brightness) { 1898 // Do nothing. 1899 // Button lights are not currently supported in the new implementation. 1900 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null); 1901 } 1902 1903 /** 1904 * Used by the window manager to override the user activity timeout based on the 1905 * current foreground activity. It can only be used to make the timeout shorter 1906 * than usual, not longer. 1907 * 1908 * This method must only be called by the window manager. 1909 * 1910 * @param timeoutMillis The overridden timeout, or -1 to disable the override. 1911 */ 1912 public void setUserActivityTimeoutOverrideFromWindowManager(long timeoutMillis) { 1913 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null); 1914 1915 final long ident = Binder.clearCallingIdentity(); 1916 try { 1917 setUserActivityTimeoutOverrideFromWindowManagerInternal(timeoutMillis); 1918 } finally { 1919 Binder.restoreCallingIdentity(ident); 1920 } 1921 } 1922 1923 private void setUserActivityTimeoutOverrideFromWindowManagerInternal(long timeoutMillis) { 1924 synchronized (mLock) { 1925 if (mUserActivityTimeoutOverrideFromWindowManager != timeoutMillis) { 1926 mUserActivityTimeoutOverrideFromWindowManager = timeoutMillis; 1927 mDirty |= DIRTY_SETTINGS; 1928 updatePowerStateLocked(); 1929 } 1930 } 1931 } 1932 1933 /** 1934 * Used by the settings application and brightness control widgets to 1935 * temporarily override the current screen brightness setting so that the 1936 * user can observe the effect of an intended settings change without applying 1937 * it immediately. 1938 * 1939 * The override will be canceled when the setting value is next updated. 1940 * 1941 * @param brightness The overridden brightness. 1942 * 1943 * @see Settings.System#SCREEN_BRIGHTNESS 1944 */ 1945 @Override // Binder call 1946 public void setTemporaryScreenBrightnessSettingOverride(int brightness) { 1947 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null); 1948 1949 final long ident = Binder.clearCallingIdentity(); 1950 try { 1951 setTemporaryScreenBrightnessSettingOverrideInternal(brightness); 1952 } finally { 1953 Binder.restoreCallingIdentity(ident); 1954 } 1955 } 1956 1957 private void setTemporaryScreenBrightnessSettingOverrideInternal(int brightness) { 1958 synchronized (mLock) { 1959 if (mTemporaryScreenBrightnessSettingOverride != brightness) { 1960 mTemporaryScreenBrightnessSettingOverride = brightness; 1961 mDirty |= DIRTY_SETTINGS; 1962 updatePowerStateLocked(); 1963 } 1964 } 1965 } 1966 1967 /** 1968 * Used by the settings application and brightness control widgets to 1969 * temporarily override the current screen auto-brightness adjustment setting so that the 1970 * user can observe the effect of an intended settings change without applying 1971 * it immediately. 1972 * 1973 * The override will be canceled when the setting value is next updated. 1974 * 1975 * @param adj The overridden brightness, or Float.NaN to disable the override. 1976 * 1977 * @see Settings.System#SCREEN_AUTO_BRIGHTNESS_ADJ 1978 */ 1979 @Override // Binder call 1980 public void setTemporaryScreenAutoBrightnessAdjustmentSettingOverride(float adj) { 1981 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DEVICE_POWER, null); 1982 1983 final long ident = Binder.clearCallingIdentity(); 1984 try { 1985 setTemporaryScreenAutoBrightnessAdjustmentSettingOverrideInternal(adj); 1986 } finally { 1987 Binder.restoreCallingIdentity(ident); 1988 } 1989 } 1990 1991 private void setTemporaryScreenAutoBrightnessAdjustmentSettingOverrideInternal(float adj) { 1992 synchronized (mLock) { 1993 // Note: This condition handles NaN because NaN is not equal to any other 1994 // value, including itself. 1995 if (mTemporaryScreenAutoBrightnessAdjustmentSettingOverride != adj) { 1996 mTemporaryScreenAutoBrightnessAdjustmentSettingOverride = adj; 1997 mDirty |= DIRTY_SETTINGS; 1998 updatePowerStateLocked(); 1999 } 2000 } 2001 } 2002 2003 /** 2004 * Low-level function turn the device off immediately, without trying 2005 * to be clean. Most people should use {@link ShutdownThread} for a clean shutdown. 2006 */ 2007 public static void lowLevelShutdown() { 2008 nativeShutdown(); 2009 } 2010 2011 /** 2012 * Low-level function to reboot the device. 2013 * 2014 * @param reason code to pass to the kernel (e.g. "recovery"), or null. 2015 * @throws IOException if reboot fails for some reason (eg, lack of 2016 * permission) 2017 */ 2018 public static void lowLevelReboot(String reason) throws IOException { 2019 nativeReboot(reason); 2020 } 2021 2022 @Override // Watchdog.Monitor implementation 2023 public void monitor() { 2024 // Grab and release lock for watchdog monitor to detect deadlocks. 2025 synchronized (mLock) { 2026 } 2027 } 2028 2029 @Override // Binder call 2030 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 2031 if (mContext.checkCallingOrSelfPermission(Manifest.permission.DUMP) 2032 != PackageManager.PERMISSION_GRANTED) { 2033 pw.println("Permission Denial: can't dump PowerManager from from pid=" 2034 + Binder.getCallingPid() 2035 + ", uid=" + Binder.getCallingUid()); 2036 return; 2037 } 2038 2039 pw.println("POWER MANAGER (dumpsys power)\n"); 2040 2041 final DisplayPowerController dpc; 2042 synchronized (mLock) { 2043 pw.println("Power Manager State:"); 2044 pw.println(" mDirty=0x" + Integer.toHexString(mDirty)); 2045 pw.println(" mWakefulness=" + wakefulnessToString(mWakefulness)); 2046 pw.println(" mIsPowered=" + mIsPowered); 2047 pw.println(" mPlugType=" + mPlugType); 2048 pw.println(" mStayOn=" + mStayOn); 2049 pw.println(" mProximityPositive=" + mProximityPositive); 2050 pw.println(" mBootCompleted=" + mBootCompleted); 2051 pw.println(" mSystemReady=" + mSystemReady); 2052 pw.println(" mWakeLockSummary=0x" + Integer.toHexString(mWakeLockSummary)); 2053 pw.println(" mUserActivitySummary=0x" + Integer.toHexString(mUserActivitySummary)); 2054 pw.println(" mRequestWaitForNegativeProximity=" + mRequestWaitForNegativeProximity); 2055 pw.println(" mSandmanScheduled=" + mSandmanScheduled); 2056 pw.println(" mLastWakeTime=" + TimeUtils.formatUptime(mLastWakeTime)); 2057 pw.println(" mLastSleepTime=" + TimeUtils.formatUptime(mLastSleepTime)); 2058 pw.println(" mSendWakeUpFinishedNotificationWhenReady=" 2059 + mSendWakeUpFinishedNotificationWhenReady); 2060 pw.println(" mSendGoToSleepFinishedNotificationWhenReady=" 2061 + mSendGoToSleepFinishedNotificationWhenReady); 2062 pw.println(" mLastUserActivityTime=" + TimeUtils.formatUptime(mLastUserActivityTime)); 2063 pw.println(" mLastUserActivityTimeNoChangeLights=" 2064 + TimeUtils.formatUptime(mLastUserActivityTimeNoChangeLights)); 2065 pw.println(" mDisplayReady=" + mDisplayReady); 2066 pw.println(" mHoldingWakeLockSuspendBlocker=" + mHoldingWakeLockSuspendBlocker); 2067 2068 pw.println(); 2069 pw.println("Settings and Configuration:"); 2070 pw.println(" mDreamsSupportedConfig=" + mDreamsSupportedConfig); 2071 pw.println(" mDreamsEnabledSetting=" + mDreamsEnabledSetting); 2072 pw.println(" mDreamsActivateOnSleepSetting=" + mDreamsActivateOnSleepSetting); 2073 pw.println(" mScreenOffTimeoutSetting=" + mScreenOffTimeoutSetting); 2074 pw.println(" mMaximumScreenOffTimeoutFromDeviceAdmin=" 2075 + mMaximumScreenOffTimeoutFromDeviceAdmin + " (enforced=" 2076 + isMaximumScreenOffTimeoutFromDeviceAdminEnforcedLocked() + ")"); 2077 pw.println(" mStayOnWhilePluggedInSetting=" + mStayOnWhilePluggedInSetting); 2078 pw.println(" mScreenBrightnessSetting=" + mScreenBrightnessSetting); 2079 pw.println(" mScreenAutoBrightnessAdjustmentSetting=" 2080 + mScreenAutoBrightnessAdjustmentSetting); 2081 pw.println(" mScreenBrightnessModeSetting=" + mScreenBrightnessModeSetting); 2082 pw.println(" mScreenBrightnessOverrideFromWindowManager=" 2083 + mScreenBrightnessOverrideFromWindowManager); 2084 pw.println(" mUserActivityTimeoutOverrideFromWindowManager=" 2085 + mUserActivityTimeoutOverrideFromWindowManager); 2086 pw.println(" mTemporaryScreenBrightnessSettingOverride=" 2087 + mTemporaryScreenBrightnessSettingOverride); 2088 pw.println(" mTemporaryScreenAutoBrightnessAdjustmentSettingOverride=" 2089 + mTemporaryScreenAutoBrightnessAdjustmentSettingOverride); 2090 pw.println(" mScreenBrightnessSettingMinimum=" + mScreenBrightnessSettingMinimum); 2091 pw.println(" mScreenBrightnessSettingMaximum=" + mScreenBrightnessSettingMaximum); 2092 pw.println(" mScreenBrightnessSettingDefault=" + mScreenBrightnessSettingDefault); 2093 2094 final int screenOffTimeout = getScreenOffTimeoutLocked(); 2095 final int screenDimDuration = getScreenDimDurationLocked(screenOffTimeout); 2096 pw.println(); 2097 pw.println("Screen off timeout: " + screenOffTimeout + " ms"); 2098 pw.println("Screen dim duration: " + screenDimDuration + " ms"); 2099 2100 pw.println(); 2101 pw.println("Wake Locks: size=" + mWakeLocks.size()); 2102 for (WakeLock wl : mWakeLocks) { 2103 pw.println(" " + wl); 2104 } 2105 2106 pw.println(); 2107 pw.println("Suspend Blockers: size=" + mSuspendBlockers.size()); 2108 for (SuspendBlocker sb : mSuspendBlockers) { 2109 pw.println(" " + sb); 2110 } 2111 2112 pw.println(); 2113 pw.println("Screen On Blocker: " + mScreenOnBlocker); 2114 2115 pw.println(); 2116 pw.println("Display Blanker: " + mDisplayBlanker); 2117 2118 dpc = mDisplayPowerController; 2119 } 2120 2121 if (dpc != null) { 2122 dpc.dump(pw); 2123 } 2124 } 2125 2126 private SuspendBlocker createSuspendBlockerLocked(String name) { 2127 SuspendBlocker suspendBlocker = new SuspendBlockerImpl(name); 2128 mSuspendBlockers.add(suspendBlocker); 2129 return suspendBlocker; 2130 } 2131 2132 private static String wakefulnessToString(int wakefulness) { 2133 switch (wakefulness) { 2134 case WAKEFULNESS_ASLEEP: 2135 return "Asleep"; 2136 case WAKEFULNESS_AWAKE: 2137 return "Awake"; 2138 case WAKEFULNESS_DREAMING: 2139 return "Dreaming"; 2140 case WAKEFULNESS_NAPPING: 2141 return "Napping"; 2142 default: 2143 return Integer.toString(wakefulness); 2144 } 2145 } 2146 2147 private static WorkSource copyWorkSource(WorkSource workSource) { 2148 return workSource != null ? new WorkSource(workSource) : null; 2149 } 2150 2151 private final class BatteryReceiver extends BroadcastReceiver { 2152 @Override 2153 public void onReceive(Context context, Intent intent) { 2154 synchronized (mLock) { 2155 handleBatteryStateChangedLocked(); 2156 } 2157 } 2158 } 2159 2160 private final class BootCompletedReceiver extends BroadcastReceiver { 2161 @Override 2162 public void onReceive(Context context, Intent intent) { 2163 synchronized (mLock) { 2164 handleBootCompletedLocked(); 2165 } 2166 } 2167 } 2168 2169 private final class DreamReceiver extends BroadcastReceiver { 2170 @Override 2171 public void onReceive(Context context, Intent intent) { 2172 synchronized (mLock) { 2173 scheduleSandmanLocked(); 2174 } 2175 } 2176 } 2177 2178 private final class UserSwitchedReceiver extends BroadcastReceiver { 2179 @Override 2180 public void onReceive(Context context, Intent intent) { 2181 synchronized (mLock) { 2182 handleSettingsChangedLocked(); 2183 } 2184 } 2185 } 2186 2187 private final class SettingsObserver extends ContentObserver { 2188 public SettingsObserver(Handler handler) { 2189 super(handler); 2190 } 2191 2192 @Override 2193 public void onChange(boolean selfChange, Uri uri) { 2194 synchronized (mLock) { 2195 handleSettingsChangedLocked(); 2196 } 2197 } 2198 } 2199 2200 /** 2201 * Handler for asynchronous operations performed by the power manager. 2202 */ 2203 private final class PowerManagerHandler extends Handler { 2204 public PowerManagerHandler(Looper looper) { 2205 super(looper, null, true /*async*/); 2206 } 2207 2208 @Override 2209 public void handleMessage(Message msg) { 2210 switch (msg.what) { 2211 case MSG_USER_ACTIVITY_TIMEOUT: 2212 handleUserActivityTimeout(); 2213 break; 2214 case MSG_SANDMAN: 2215 handleSandman(); 2216 break; 2217 case MSG_SCREEN_ON_BLOCKER_RELEASED: 2218 handleScreenOnBlockerReleased(); 2219 break; 2220 } 2221 } 2222 } 2223 2224 /** 2225 * Represents a wake lock that has been acquired by an application. 2226 */ 2227 private final class WakeLock implements IBinder.DeathRecipient { 2228 public final IBinder mLock; 2229 public int mFlags; 2230 public String mTag; 2231 public WorkSource mWorkSource; 2232 public int mOwnerUid; 2233 public int mOwnerPid; 2234 2235 public WakeLock(IBinder lock, int flags, String tag, WorkSource workSource, 2236 int ownerUid, int ownerPid) { 2237 mLock = lock; 2238 mFlags = flags; 2239 mTag = tag; 2240 mWorkSource = copyWorkSource(workSource); 2241 mOwnerUid = ownerUid; 2242 mOwnerPid = ownerPid; 2243 } 2244 2245 @Override 2246 public void binderDied() { 2247 PowerManagerService.this.handleWakeLockDeath(this); 2248 } 2249 2250 public boolean hasSameProperties(int flags, String tag, WorkSource workSource, 2251 int ownerUid, int ownerPid) { 2252 return mFlags == flags 2253 && mTag.equals(tag) 2254 && hasSameWorkSource(workSource) 2255 && mOwnerUid == ownerUid 2256 && mOwnerPid == ownerPid; 2257 } 2258 2259 public void updateProperties(int flags, String tag, WorkSource workSource, 2260 int ownerUid, int ownerPid) { 2261 mFlags = flags; 2262 mTag = tag; 2263 updateWorkSource(workSource); 2264 mOwnerUid = ownerUid; 2265 mOwnerPid = ownerPid; 2266 } 2267 2268 public boolean hasSameWorkSource(WorkSource workSource) { 2269 return Objects.equal(mWorkSource, workSource); 2270 } 2271 2272 public void updateWorkSource(WorkSource workSource) { 2273 mWorkSource = copyWorkSource(workSource); 2274 } 2275 2276 @Override 2277 public String toString() { 2278 return getLockLevelString() 2279 + " '" + mTag + "'" + getLockFlagsString() 2280 + " (uid=" + mOwnerUid + ", pid=" + mOwnerPid + ", ws=" + mWorkSource + ")"; 2281 } 2282 2283 private String getLockLevelString() { 2284 switch (mFlags & PowerManager.WAKE_LOCK_LEVEL_MASK) { 2285 case PowerManager.FULL_WAKE_LOCK: 2286 return "FULL_WAKE_LOCK "; 2287 case PowerManager.SCREEN_BRIGHT_WAKE_LOCK: 2288 return "SCREEN_BRIGHT_WAKE_LOCK "; 2289 case PowerManager.SCREEN_DIM_WAKE_LOCK: 2290 return "SCREEN_DIM_WAKE_LOCK "; 2291 case PowerManager.PARTIAL_WAKE_LOCK: 2292 return "PARTIAL_WAKE_LOCK "; 2293 case PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK: 2294 return "PROXIMITY_SCREEN_OFF_WAKE_LOCK"; 2295 default: 2296 return "??? "; 2297 } 2298 } 2299 2300 private String getLockFlagsString() { 2301 String result = ""; 2302 if ((mFlags & PowerManager.ACQUIRE_CAUSES_WAKEUP) != 0) { 2303 result += " ACQUIRE_CAUSES_WAKEUP"; 2304 } 2305 if ((mFlags & PowerManager.ON_AFTER_RELEASE) != 0) { 2306 result += " ON_AFTER_RELEASE"; 2307 } 2308 return result; 2309 } 2310 } 2311 2312 private final class SuspendBlockerImpl implements SuspendBlocker { 2313 private final String mName; 2314 private int mReferenceCount; 2315 2316 public SuspendBlockerImpl(String name) { 2317 mName = name; 2318 } 2319 2320 @Override 2321 protected void finalize() throws Throwable { 2322 try { 2323 if (mReferenceCount != 0) { 2324 Log.wtf(TAG, "Suspend blocker \"" + mName 2325 + "\" was finalized without being released!"); 2326 mReferenceCount = 0; 2327 nativeReleaseSuspendBlocker(mName); 2328 } 2329 } finally { 2330 super.finalize(); 2331 } 2332 } 2333 2334 @Override 2335 public void acquire() { 2336 synchronized (this) { 2337 mReferenceCount += 1; 2338 if (mReferenceCount == 1) { 2339 nativeAcquireSuspendBlocker(mName); 2340 } 2341 } 2342 } 2343 2344 @Override 2345 public void release() { 2346 synchronized (this) { 2347 mReferenceCount -= 1; 2348 if (mReferenceCount == 0) { 2349 nativeReleaseSuspendBlocker(mName); 2350 } else if (mReferenceCount < 0) { 2351 Log.wtf(TAG, "Suspend blocker \"" + mName 2352 + "\" was released without being acquired!", new Throwable()); 2353 mReferenceCount = 0; 2354 } 2355 } 2356 } 2357 2358 @Override 2359 public String toString() { 2360 synchronized (this) { 2361 return mName + ": ref count=" + mReferenceCount; 2362 } 2363 } 2364 } 2365 2366 private final class ScreenOnBlockerImpl implements ScreenOnBlocker { 2367 private int mNestCount; 2368 2369 public boolean isHeld() { 2370 synchronized (this) { 2371 return mNestCount != 0; 2372 } 2373 } 2374 2375 @Override 2376 public void acquire() { 2377 synchronized (this) { 2378 mNestCount += 1; 2379 if (DEBUG) { 2380 Slog.d(TAG, "Screen on blocked: mNestCount=" + mNestCount); 2381 } 2382 } 2383 } 2384 2385 @Override 2386 public void release() { 2387 synchronized (this) { 2388 mNestCount -= 1; 2389 if (mNestCount < 0) { 2390 Log.wtf(TAG, "Screen on blocker was released without being acquired!", 2391 new Throwable()); 2392 mNestCount = 0; 2393 } 2394 if (mNestCount == 0) { 2395 mHandler.sendEmptyMessage(MSG_SCREEN_ON_BLOCKER_RELEASED); 2396 } 2397 if (DEBUG) { 2398 Slog.d(TAG, "Screen on unblocked: mNestCount=" + mNestCount); 2399 } 2400 } 2401 } 2402 2403 @Override 2404 public String toString() { 2405 synchronized (this) { 2406 return "held=" + (mNestCount != 0) + ", mNestCount=" + mNestCount; 2407 } 2408 } 2409 } 2410 2411 private final class DisplayBlankerImpl implements DisplayBlanker { 2412 private boolean mBlanked; 2413 2414 @Override 2415 public void blankAllDisplays() { 2416 synchronized (this) { 2417 mBlanked = true; 2418 mDisplayManagerService.blankAllDisplaysFromPowerManager(); 2419 nativeSetInteractive(false); 2420 nativeSetAutoSuspend(true); 2421 } 2422 } 2423 2424 @Override 2425 public void unblankAllDisplays() { 2426 synchronized (this) { 2427 nativeSetAutoSuspend(false); 2428 nativeSetInteractive(true); 2429 mDisplayManagerService.unblankAllDisplaysFromPowerManager(); 2430 mBlanked = false; 2431 } 2432 } 2433 2434 @Override 2435 public String toString() { 2436 synchronized (this) { 2437 return "blanked=" + mBlanked; 2438 } 2439 } 2440 } 2441} 2442