RefCountedBufferQueueController.java revision 4961ad31d9a877e3a68566fb5d4b33b7f79ce44e 
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
19import javax.annotation.Nonnull;
20
21/**
22 * Wraps a {@link BufferQueueController} with reference counting.
23 */
24public class RefCountedBufferQueueController<T> implements BufferQueueController<T> {
25    private final RefCountBase<BufferQueueController> mBuffer;
26
27    public RefCountedBufferQueueController(BufferQueueController<T> stream) {
28        mBuffer = new RefCountBase<BufferQueueController>(stream, 1);
29    }
30
31    @Override
32    public void update(@Nonnull T element) {
33        mBuffer.get().update(element);
34    }
35
36    @Override
37    public boolean isClosed() {
38        return mBuffer.get().isClosed();
39    }
40
41    public void addRef() {
42        mBuffer.addRef();
43    }
44
45    @Override
46    public void close() {
47        mBuffer.close();
48    }
49}
50