| /* |
| * Copyright (C) 2019 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.systemui |
| |
| import android.util.Log |
| import com.android.internal.annotations.GuardedBy |
| import com.android.systemui.dump.DumpManager |
| import java.io.FileDescriptor |
| import java.io.PrintWriter |
| import java.lang.ref.WeakReference |
| import java.util.concurrent.atomic.AtomicBoolean |
| import javax.inject.Inject |
| import javax.inject.Singleton |
| |
| /** |
| * Caches whether the device has reached [SystemService.PHASE_BOOT_COMPLETED]. |
| * |
| * This class is constructed and set by [SystemUIApplication] and will notify all listeners when |
| * boot is completed. |
| */ |
| @Singleton |
| class BootCompleteCacheImpl @Inject constructor(dumpManager: DumpManager) : |
| BootCompleteCache, Dumpable { |
| |
| companion object { |
| private const val TAG = "BootCompleteCacheImpl" |
| private const val DEBUG = false |
| } |
| |
| init { |
| dumpManager.registerDumpable(TAG, this) |
| } |
| |
| @GuardedBy("listeners") |
| private val listeners = mutableListOf<WeakReference<BootCompleteCache.BootCompleteListener>>() |
| private val bootComplete = AtomicBoolean(false) |
| |
| /** |
| * Provides the current boot state of the system as determined by [SystemUIApplication]. |
| * @return `true` if the system has reached [SystemService.PHASE_BOOT_COMPLETED] |
| */ |
| override fun isBootComplete(): Boolean = bootComplete.get() |
| |
| /** |
| * Indicates to this object that boot is complete. Subsequent calls to this function will have |
| * no effect. |
| */ |
| fun setBootComplete() { |
| if (bootComplete.compareAndSet(false, true)) { |
| if (DEBUG) Log.d(TAG, "Boot complete set") |
| synchronized(listeners) { |
| listeners.forEach { |
| it.get()?.onBootComplete() |
| } |
| listeners.clear() |
| } |
| } |
| } |
| |
| /** |
| * Add a listener for boot complete event. It will immediately return the current boot complete |
| * state. If this value is true, [BootCompleteCache.BootCompleteListener.onBootComplete] will |
| * never be called. |
| * |
| * @param listener a listener for boot complete state. |
| * @return `true` if boot has been completed. |
| */ |
| override fun addListener(listener: BootCompleteCache.BootCompleteListener): Boolean { |
| if (bootComplete.get()) return true |
| synchronized(listeners) { |
| if (bootComplete.get()) return true |
| listeners.add(WeakReference(listener)) |
| if (DEBUG) Log.d(TAG, "Adding listener: $listener") |
| return false |
| } |
| } |
| |
| /** |
| * Removes a listener for boot complete event. |
| * |
| * @param listener a listener to removed. |
| */ |
| override fun removeListener(listener: BootCompleteCache.BootCompleteListener) { |
| if (bootComplete.get()) return |
| synchronized(listeners) { |
| listeners.removeIf { it.get() == null || it.get() === listener } |
| if (DEBUG) Log.d(TAG, "Removing listener: $listener") |
| } |
| } |
| |
| override fun dump(fd: FileDescriptor, pw: PrintWriter, args: Array<out String>) { |
| pw.println("BootCompleteCache state:") |
| pw.println(" boot complete: ${isBootComplete()}") |
| if (!isBootComplete()) { |
| pw.println(" listeners:") |
| synchronized(listeners) { |
| listeners.forEach { |
| pw.println(" $it") |
| } |
| } |
| } |
| } |
| } |