1 /* 2 * Copyright (C) 2014 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 17 package com.android.camera.async; 18 19 import javax.annotation.Nonnull; 20 21 /** 22 * Wraps a {@link BufferQueueController} with reference counting. 23 */ 24 public class RefCountedBufferQueueController<T> implements BufferQueueController<T> { 25 private final RefCountBase<BufferQueueController> mBuffer; 26 RefCountedBufferQueueController(BufferQueueController<T> stream)27 public RefCountedBufferQueueController(BufferQueueController<T> stream) { 28 mBuffer = new RefCountBase<BufferQueueController>(stream, 1); 29 } 30 31 @Override update(@onnull T element)32 public void update(@Nonnull T element) { 33 mBuffer.get().update(element); 34 } 35 36 @Override isClosed()37 public boolean isClosed() { 38 return mBuffer.get().isClosed(); 39 } 40 addRef()41 public void addRef() { 42 mBuffer.addRef(); 43 } 44 45 @Override close()46 public void close() { 47 mBuffer.close(); 48 } 49 } 50