RefCountedBufferQueueController.java revision de15a5ad14da2e9069642e6f616b66b4ae660e01 
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
17package com.android.camera.async;
18
19/**
20 * Wraps a {@link BufferQueueController} with reference counting.
21 */
22public class RefCountedBufferQueueController<T> implements BufferQueueController<T> {
23    private final RefCountBase<BufferQueueController> mBuffer;
24
25    public RefCountedBufferQueueController(BufferQueueController<T> stream) {
26        mBuffer = new RefCountBase<BufferQueueController>(stream, 1);
27    }
28
29    @Override
30    public void append(T element) {
31        mBuffer.get().append(element);
32    }
33
34    @Override
35    public boolean isClosed() {
36        return mBuffer.get().isClosed();
37    }
38
39    public void addRef() {
40        mBuffer.addRef();
41    }
42
43    @Override
44    public void close() {
45        mBuffer.close();
46    }
47}
48