43 lines
1.2 KiB
C#
43 lines
1.2 KiB
C#
namespace MfGames.Locking;
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/// <summary>
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/// Defines a ReaderWriterLockSlim upgradable read lock.
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/// </summary>
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public class NestableUpgradableReadLock : IDisposable
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{
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private readonly bool lockAcquired;
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private readonly ReaderWriterLockSlim readerWriterLockSlim;
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/// <summary>
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/// Initializes a new instance of the <see cref="NestableUpgradableReadLock" />
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/// class.
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/// </summary>
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/// <param name="readerWriterLockSlim">The reader writer lock slim.</param>
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public NestableUpgradableReadLock(ReaderWriterLockSlim readerWriterLockSlim)
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{
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// Keep track of the lock since we'll need it to release the lock.
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this.readerWriterLockSlim = readerWriterLockSlim;
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// If we already have a read or write lock, we don't do anything.
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if (readerWriterLockSlim.IsUpgradeableReadLockHeld || readerWriterLockSlim.IsWriteLockHeld)
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{
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this.lockAcquired = false;
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}
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else
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{
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readerWriterLockSlim.EnterUpgradeableReadLock();
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this.lockAcquired = true;
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}
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}
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/// <inheritdoc />
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public void Dispose()
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{
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if (this.lockAcquired)
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{
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this.readerWriterLockSlim.ExitUpgradeableReadLock();
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}
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}
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}
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