mcs/class/System/System.Net/HttpStreamAsyncResult.cs

   1 //
   2 // System.Net.HttpStreamAsyncResult
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   6 //
   7 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28 using System.Threading;
  29
  30 namespace System.Net {
  31         class HttpStreamAsyncResult : IAsyncResult {
  32                 object locker = new object ();
  33                 ManualResetEvent handle;
  34                 bool completed;
  35
  36                 internal byte [] Buffer;
  37                 internal int Offset;
  38                 internal int Count;
  39                 internal AsyncCallback Callback;
  40                 internal object State;
  41                 internal int SynchRead;
  42                 internal Exception Error;
  43
  44                 public void Complete (Exception e)
  45                 {
  46                         Error = e;
  47                         Complete ();
  48                 }
  49
  50                 public void Complete ()
  51                 {
  52                         lock (locker) {
  53                                 if (completed)
  54                                         return;
  55
  56                                 completed = true;
  57                                 if (handle != null)
  58                                         handle.Set ();
  59
  60                                 if (Callback != null)
  61                                         Callback.BeginInvoke (this, null, null);
  62                         }
  63                 }
  64
  65                 public object AsyncState {
  66                         get { return State; }
  67                 }
  68
  69                 public WaitHandle AsyncWaitHandle {
  70                         get {
  71                                 lock (locker) {
  72                                         if (handle == null)
  73                                                 handle = new ManualResetEvent (completed);
  74                                 }
  75
  76                                 return handle;
  77                         }
  78                 }
  79
  80                 public bool CompletedSynchronously {
  81                         get { return (SynchRead == Count); }
  82                 }
  83
  84                 public bool IsCompleted {
  85                         get {
  86                                 lock (locker) {
  87                                         return completed;
  88                                 }
  89                         }
  90                 }
  91         }
  92 }
  93