// ----------------------------------------------------------------------- // Copyright (c) Microsoft Corporation. All rights reserved. // ----------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading; namespace Microsoft.Internal { internal sealed class Lock : IDisposable { #if (!SILVERLIGHT) private ReaderWriterLockSlim _thisLock = new ReaderWriterLockSlim(LockRecursionPolicy.NoRecursion); private int _isDisposed = 0; public void EnterReadLock() { this._thisLock.EnterReadLock(); } public void EnterWriteLock() { this._thisLock.EnterWriteLock(); } public void ExitReadLock() { this._thisLock.ExitReadLock(); } public void ExitWriteLock() { this._thisLock.ExitWriteLock(); } public void Dispose() { if (Interlocked.CompareExchange(ref this._isDisposed, 1, 0) == 0) { this._thisLock.Dispose(); } } #else // ReaderWriterLockSlim is not yet implemented on SilverLight // Satisfies our requirements until it is implemented object _thisLock = new object(); public Lock() { } public void EnterReadLock() { Monitor.Enter(this._thisLock); } public void EnterWriteLock() { Monitor.Enter(this._thisLock); } public void ExitReadLock() { Monitor.Exit(this._thisLock); } public void ExitWriteLock() { Monitor.Exit(this._thisLock); } public void Dispose() { } #endif } }
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