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

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