63 lines
1.7 KiB
C#
63 lines
1.7 KiB
C#
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// <copyright>
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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namespace System.ServiceModel.Channels
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{
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using System.Runtime;
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using System.Threading;
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// IMPORTANT: Only meant to be used within a using statement.
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struct LockHelper : IDisposable
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{
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ReaderWriterLockSlim readerWriterLock;
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bool isReaderLock;
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bool isLockHeld;
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LockHelper(ReaderWriterLockSlim readerWriterLock, bool isReaderLock)
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{
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this.readerWriterLock = readerWriterLock;
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this.isReaderLock = isReaderLock;
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if (isReaderLock)
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{
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this.readerWriterLock.EnterReadLock();
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}
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else
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{
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this.readerWriterLock.EnterWriteLock();
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}
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this.isLockHeld = true;
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}
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public void Dispose()
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{
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if (this.isLockHeld)
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{
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this.isLockHeld = false;
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if (this.isReaderLock)
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{
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this.readerWriterLock.ExitReadLock();
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}
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else
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{
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this.readerWriterLock.ExitWriteLock();
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}
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}
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}
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internal static IDisposable TakeWriterLock(ReaderWriterLockSlim readerWriterLock)
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{
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Fx.Assert(readerWriterLock != null, "The readerWriterLock cannot be null.");
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return new LockHelper(readerWriterLock, false);
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}
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internal static IDisposable TakeReaderLock(ReaderWriterLockSlim readerWriterLock)
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{
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Fx.Assert(readerWriterLock != null, "The readerWriterLock cannot be null.");
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return new LockHelper(readerWriterLock, true);
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}
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}
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}
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