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