| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| using System; |
| |
| namespace Apache.NMS.Util |
| { |
| public class AtomicReference<T> |
| { |
| protected T atomicValue; |
| |
| public T Value |
| { |
| get |
| { |
| lock (this) |
| { |
| return atomicValue; |
| } |
| } |
| set |
| { |
| lock (this) |
| { |
| atomicValue = value; |
| } |
| } |
| } |
| |
| public AtomicReference() |
| { |
| atomicValue = default(T); |
| } |
| |
| public AtomicReference(T defaultValue) |
| { |
| atomicValue = defaultValue; |
| } |
| |
| public T GetAndSet(T value) |
| { |
| lock (this) |
| { |
| T ret = atomicValue; |
| atomicValue = value; |
| return ret; |
| } |
| } |
| } |
| |
| public class Atomic<T> : AtomicReference<T> where T : IComparable |
| { |
| public Atomic() : base() |
| { |
| } |
| |
| public Atomic(T defaultValue) : base(defaultValue) |
| { |
| } |
| |
| public bool CompareAndSet(T expected, T newValue) |
| { |
| lock (this) |
| { |
| if (0 == atomicValue.CompareTo(expected)) |
| { |
| atomicValue = newValue; |
| return true; |
| } |
| |
| return false; |
| } |
| } |
| } |
| } |