class/System.ComponentModel.Composition/src/Composition.Initialization/Microsoft/Internal/Lock.Reader.cs

   1 // -----------------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 // -----------------------------------------------------------------------
   4 using System;
   5 using System.Collections.Generic;
   6 using System.Linq;
   7 using System.Text;
   8 using System.Threading;
   9
  10 namespace Microsoft.Internal
  11 {
  12     internal struct ReadLock : IDisposable
  13     {
  14         private readonly Lock _lock;
  15         private int _isDisposed;
  16
  17         public ReadLock(Lock @lock)
  18         {
  19             this._isDisposed = 0;
  20             this._lock = @lock;
  21             this._lock.EnterReadLock();
  22         }
  23
  24         public void Dispose()
  25         {
  26             if (Interlocked.CompareExchange(ref this._isDisposed, 1, 0) == 0)
  27             {
  28                 this._lock.ExitReadLock();
  29             }
  30         }
  31     }
  32 }