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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
using System.Threading;
namespace System.Reactive.Disposables
{
/// <summary>
/// Represents an Action-based disposable.
/// </summary>
internal sealed class AnonymousDisposable : ICancelable
{
private volatile Action _dispose;
/// <summary>
/// Constructs a new disposable with the given action used for disposal.
/// </summary>
/// <param name="dispose">Disposal action which will be run upon calling Dispose.</param>
public AnonymousDisposable(Action dispose)
{
System.Diagnostics.Debug.Assert(dispose != null);
_dispose = dispose;
}
/// <summary>
/// Gets a value that indicates whether the object is disposed.
/// </summary>
public bool IsDisposed
{
get { return _dispose == null; }
}
/// <summary>
/// Calls the disposal action if and only if the current instance hasn't been disposed yet.
/// </summary>
public void Dispose()
{
#pragma warning disable 0420
var dispose = Interlocked.Exchange(ref _dispose, null);
#pragma warning restore 0420
if (dispose != null)
{
dispose();
}
}
}
}
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