| /* |
| * Copyright (C) 2017 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.recents.model; |
| |
| import com.android.systemui.shared.recents.model.Task; |
| import java.util.concurrent.ConcurrentLinkedQueue; |
| |
| /** |
| * A Task load queue |
| */ |
| class TaskResourceLoadQueue { |
| |
| private final ConcurrentLinkedQueue<Task> mQueue = new ConcurrentLinkedQueue<>(); |
| |
| /** Adds a new task to the load queue */ |
| void addTask(Task t) { |
| if (!mQueue.contains(t)) { |
| mQueue.add(t); |
| } |
| synchronized(this) { |
| notifyAll(); |
| } |
| } |
| |
| /** |
| * Retrieves the next task from the load queue, as well as whether we want that task to be |
| * force reloaded. |
| */ |
| Task nextTask() { |
| return mQueue.poll(); |
| } |
| |
| /** Removes a task from the load queue */ |
| void removeTask(Task t) { |
| mQueue.remove(t); |
| } |
| |
| /** Clears all the tasks from the load queue */ |
| void clearTasks() { |
| mQueue.clear(); |
| } |
| |
| /** Returns whether the load queue is empty */ |
| boolean isEmpty() { |
| return mQueue.isEmpty(); |
| } |
| } |