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.one.v2.sharedimagereader.imagedistributor;
18
19import java.util.concurrent.atomic.AtomicBoolean;
20import java.util.concurrent.atomic.AtomicInteger;
21
22import com.android.camera.one.v2.camera2proxy.ForwardingImageProxy;
23import com.android.camera.one.v2.camera2proxy.ImageProxy;
24
25/**
26 * Wraps {@link ImageProxy} to filter out multiple calls to {@link #close}.
27 */
28class SingleCloseImageProxy extends ForwardingImageProxy {
29    private final AtomicBoolean mClosed;
30
31    /**
32     * @param image The image to wrap
33     */
34    public SingleCloseImageProxy(ImageProxy image) {
35        super(image);
36        mClosed = new AtomicBoolean(false);
37    }
38
39    @Override
40    public void close() {
41        if (!mClosed.getAndSet(true)) {
42            super.close();
43        }
44    }
45}
46