1 /* 2 * Copyright (C) 2017 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 package com.android.wallpaper.module; 17 18 /** 19 * Provides a singleton POJO used to lock file read and write operations and metadata transactions 20 * on the daily rotating wallpaper. 21 */ 22 public class RotatingWallpaperLockProvider { 23 24 private static Object sInstance; 25 getInstance()26 public static synchronized Object getInstance() { 27 if (sInstance == null) { 28 sInstance = new Object(); 29 } 30 return sInstance; 31 } 32 } 33