mcs/class/System.Web.Mvc3/Mvc/Async/SimpleAsyncResult.cs

   1 namespace System.Web.Mvc.Async {
   2     using System;
   3     using System.Threading;
   4
   5     internal sealed class SimpleAsyncResult : IAsyncResult {
   6
   7         private readonly object _asyncState;
   8         private bool _completedSynchronously;
   9         private volatile bool _isCompleted;
  10
  11         public SimpleAsyncResult(object asyncState) {
  12             _asyncState = asyncState;
  13         }
  14
  15         public object AsyncState {
  16             get {
  17                 return _asyncState;
  18             }
  19         }
  20
  21         // ASP.NET IAsyncResult objects should never expose a WaitHandle due to potential deadlocking
  22         public WaitHandle AsyncWaitHandle {
  23             get {
  24                 return null;
  25             }
  26         }
  27
  28         public bool CompletedSynchronously {
  29             get {
  30                 return _completedSynchronously;
  31             }
  32         }
  33
  34         public bool IsCompleted {
  35             get {
  36                 return _isCompleted;
  37             }
  38         }
  39
  40         // Proper order of execution:
  41         // 1. Set the CompletedSynchronously property to the correct value
  42         // 2. Set the IsCompleted flag
  43         // 3. Execute the callback
  44         // 4. Signal the WaitHandle (which we don't have)
  45         public void MarkCompleted(bool completedSynchronously, AsyncCallback callback) {
  46             _completedSynchronously = completedSynchronously;
  47             _isCompleted = true;
  48
  49             if (callback != null) {
  50                 callback(this);
  51             }
  52         }
  53
  54     }
  55 }