mcs/class/System.Web.Services/System.Web.Services.Protocols/WebClientAsyncResult.cs

   1 // \r
   2 // System.Web.Services.Protocols.WebClientAsyncResult.cs\r
   3 //\r
   4 // Author:\r
   5 //   Tim Coleman (tim@timcoleman.com)\r
   6 //   Lluis Sanchez Gual (lluis@ximian.com)\r
   7 //\r
   8 // Copyright (C) Tim Coleman, 2002\r
   9 //\r
  10
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31 \r
  32 using System.Net;\r
  33 using System.Threading;\r
  34 \r
  35 namespace System.Web.Services.Protocols {\r
  36         public class WebClientAsyncResult : IAsyncResult {\r
  37 \r
  38                 #region Fields\r
  39 \r
  40                 AsyncCallback _callback;\r
  41                 object _asyncState;\r
  42 \r
  43                 bool _completedSynchronously;\r
  44                 bool _done;\r
  45                 ManualResetEvent _waitHandle;\r
  46                 \r
  47                 internal object Result;\r
  48                 internal Exception Exception;\r
  49                 internal WebRequest Request;\r
  50                         \r
  51                 #endregion // Fields\r
  52 \r
  53                 #region Constructors \r
  54 \r
  55                 internal WebClientAsyncResult (WebRequest request, AsyncCallback callback, object asyncState)\r
  56                 {\r
  57                         _callback = callback; \r
  58                         Request = request;\r
  59                         _asyncState = asyncState;\r
  60                 }\r
  61 \r
  62                 #endregion // Constructors\r
  63 \r
  64                 #region Properties\r
  65 \r
  66                 public object AsyncState {\r
  67                         get { return _asyncState; }\r
  68                 }\r
  69 \r
  70                 public WaitHandle AsyncWaitHandle \r
  71                 {\r
  72                         get\r
  73                         {\r
  74                                 lock (this) {\r
  75                                         if (_waitHandle != null) return _waitHandle;\r
  76                                         _waitHandle = new ManualResetEvent (_done);\r
  77                                         return _waitHandle;\r
  78                                 }\r
  79                         }\r
  80                 }\r
  81 \r
  82                 public bool CompletedSynchronously \r
  83                 {\r
  84                         get { return _completedSynchronously; }\r
  85                 }\r
  86 \r
  87                 public bool IsCompleted \r
  88                 {\r
  89                         get { lock (this) { return _done; } }\r
  90                 }\r
  91 \r
  92                 #endregion // Properties\r
  93 \r
  94                 #region Methods\r
  95 \r
  96                 public void Abort ()\r
  97                 {\r
  98                         Request.Abort ();\r
  99                 }\r
 100 \r
 101                 internal void SetCompleted (object result, Exception exception, bool async)\r
 102                 {\r
 103                         lock (this)\r
 104                         {\r
 105                                 Exception = exception;\r
 106                                 Result = result;\r
 107                                 _done = true;\r
 108                                 _completedSynchronously = async;\r
 109                                 if (_waitHandle != null) _waitHandle.Set ();\r
 110                                 Monitor.PulseAll (this);\r
 111                         }\r
 112                         if (_callback != null) _callback (this);\r
 113                 }\r
 114 \r
 115                 internal void WaitForComplete ()\r
 116                 {\r
 117                         lock (this)\r
 118                         {\r
 119                                 Monitor.Wait (this);\r
 120                         }\r
 121                 }\r
 122 \r
 123                 #endregion // Methods\r
 124         }\r
 125 }