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

   1 //
   2 // System.Web.Services.Protocols.WebClientAsyncResult.cs
   3 //
   4 // Author:
   5 //   Tim Coleman (tim@timcoleman.com)
   6 //   Lluis Sanchez Gual (lluis@ximian.com)
   7 //
   8 // Copyright (C) Tim Coleman, 2002
   9 //
  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
  32 using System.Net;
  33 using System.Threading;
  34
  35 namespace System.Web.Services.Protocols {
  36         public class WebClientAsyncResult : IAsyncResult {
  37
  38                 #region Fields
  39
  40                 AsyncCallback _callback;
  41                 object _asyncState;
  42
  43                 bool _completedSynchronously;
  44                 bool _done;
  45                 ManualResetEvent _waitHandle;
  46
  47                 internal object Result;
  48                 internal Exception Exception;
  49                 internal WebRequest Request;
  50
  51                 #endregion // Fields
  52
  53                 #region Constructors
  54
  55                 internal WebClientAsyncResult (WebRequest request, AsyncCallback callback, object asyncState)
  56                 {
  57                         _callback = callback;
  58                         Request = request;
  59                         _asyncState = asyncState;
  60                 }
  61
  62                 #endregion // Constructors
  63
  64                 #region Properties
  65
  66                 public object AsyncState {
  67                         get { return _asyncState; }
  68                 }
  69
  70                 public WaitHandle AsyncWaitHandle
  71                 {
  72                         get
  73                         {
  74                                 lock (this) {
  75                                         if (_waitHandle != null) return _waitHandle;
  76                                         _waitHandle = new ManualResetEvent (_done);
  77                                         return _waitHandle;
  78                                 }
  79                         }
  80                 }
  81
  82                 public bool CompletedSynchronously
  83                 {
  84                         get { return _completedSynchronously; }
  85                 }
  86
  87                 public bool IsCompleted
  88                 {
  89                         get { lock (this) { return _done; } }
  90                 }
  91
  92                 #endregion // Properties
  93
  94                 #region Methods
  95
  96                 public void Abort ()
  97                 {
  98                         Request.Abort ();
  99                 }
 100
 101                 internal void SetCompleted (object result, Exception exception, bool async)
 102                 {
 103                         lock (this)
 104                         {
 105                                 Exception = exception;
 106                                 Result = result;
 107                                 _done = true;
 108                                 _completedSynchronously = async;
 109                                 if (_waitHandle != null) _waitHandle.Set ();
 110                                 Monitor.PulseAll (this);
 111                         }
 112                         if (_callback != null) _callback (this);
 113                 }
 114
 115                 internal void WaitForComplete ()
 116                 {
 117                         lock (this)
 118                         {
 119                                 if (_done)
 120                                         return;
 121                                 Monitor.Wait (this);
 122                         }
 123                 }
 124
 125                 #endregion // Methods
 126         }
 127 }