| // CHECKSTYLE_OFF: Copyrighted to Guava Authors. |
| /* |
| * Copyright (C) 2015 The Guava Authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| // CHECKSTYLE_ON |
| |
| package java.util.concurrent.atomic; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * GWT emulated version of {@link AtomicReferenceArray}. |
| * |
| * @param <V> the element type. |
| */ |
| public class AtomicReferenceArray<V> { |
| |
| private final List<V> values; |
| |
| public AtomicReferenceArray(V[] array) { |
| values = new ArrayList<V>(Arrays.asList(array)); |
| } |
| |
| public AtomicReferenceArray(int length) { |
| values = new ArrayList<V>(Collections.<V>nCopies(length, null)); |
| } |
| |
| public boolean compareAndSet(int i, V expect, V update) { |
| if (values.get(i) == expect) { |
| values.set(i, update); |
| return true; |
| } |
| return false; |
| } |
| |
| public V get(int i) { |
| return values.get(i); |
| } |
| |
| public V getAndSet(int i, V x) { |
| return values.set(i, x); |
| } |
| |
| public void lazySet(int i, V x) { |
| values.set(i, x); |
| } |
| |
| public int length() { |
| return values.size(); |
| } |
| |
| public void set(int i, V x) { |
| values.set(i, x); |
| } |
| |
| public boolean weakCompareAndSet(int i, V expect, V update) { |
| return compareAndSet(i, expect, update); |
| } |
| |
| @Override |
| public String toString() { |
| return values.toString(); |
| } |
| } |