53 lines
2.2 KiB
C#
53 lines
2.2 KiB
C#
// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT License.
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// See the LICENSE file in the project root for more information.
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using System.Reactive.Concurrency;
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using System.Threading;
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namespace System.Reactive.Disposables
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{
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/// <summary>
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/// Represents a disposable resource whose disposal invocation will be posted to the specified <seealso cref="SynchronizationContext"/>.
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/// </summary>
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public sealed class ContextDisposable : ICancelable
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{
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private volatile IDisposable _disposable;
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/// <summary>
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/// Initializes a new instance of the <see cref="ContextDisposable"/> class that uses the specified <see cref="SynchronizationContext"/> on which to dispose the specified disposable resource.
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/// </summary>
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/// <param name="context">Context to perform disposal on.</param>
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/// <param name="disposable">Disposable whose Dispose operation to run on the given synchronization context.</param>
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/// <exception cref="ArgumentNullException"><paramref name="context"/> or <paramref name="disposable"/> is null.</exception>
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public ContextDisposable(SynchronizationContext context, IDisposable disposable)
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{
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Context = context ?? throw new ArgumentNullException(nameof(context));
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_disposable = disposable ?? throw new ArgumentNullException(nameof(disposable));
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}
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/// <summary>
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/// Gets the provided <see cref="SynchronizationContext"/>.
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/// </summary>
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public SynchronizationContext Context { get; }
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/// <summary>
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/// Gets a value that indicates whether the object is disposed.
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/// </summary>
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public bool IsDisposed => _disposable == BooleanDisposable.True;
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/// <summary>
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/// Disposes the underlying disposable on the provided <see cref="SynchronizationContext"/>.
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/// </summary>
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public void Dispose()
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{
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var old = Interlocked.Exchange(ref _disposable, BooleanDisposable.True);
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if (old != BooleanDisposable.True)
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{
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Context.PostWithStartComplete(static d => d.Dispose(), old);
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}
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}
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}
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}
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