mcs/class/Mono.Data.Tds/Mono.Data.Tds.Protocol/TdsAsyncResult.cs

   1 //
   2 // Mono.Data.Tds.Protocol.TdsAsyncResult.cs
   3 //
   4 // Author:
   5 //   T Sureshkumar <tsureshkumar@novell.com>
   6 //   Ankit Jain <radical@corewars.org>
   7
   8 //
   9 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  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
  33 using System;
  34 using System.Threading;
  35
  36 namespace Mono.Data.Tds.Protocol
  37 {
  38         internal class TdsAsyncResult : IAsyncResult
  39         {
  40                 private TdsAsyncState _tdsState;
  41                 private WaitHandle _waitHandle;
  42                 private bool _completed = false;
  43                 private bool _completedSyncly = false;
  44                 private AsyncCallback _userCallback;
  45                 private object _retValue;
  46                 private Exception _exception = null;
  47
  48                 public TdsAsyncResult (AsyncCallback userCallback, TdsAsyncState tdsState)
  49                 {
  50                         _tdsState = tdsState;
  51                         _userCallback = userCallback;
  52                         _waitHandle = new ManualResetEvent (false);
  53                 }
  54
  55                 public TdsAsyncResult (AsyncCallback userCallback, object state)
  56                 {
  57                         _tdsState = new TdsAsyncState (state);
  58                         _userCallback = userCallback;
  59                         _waitHandle = new ManualResetEvent (false);
  60                 }
  61
  62
  63                 public object AsyncState
  64                 {
  65                         get {   return _tdsState.UserState; }
  66                 }
  67
  68                 internal TdsAsyncState TdsAsyncState
  69                 {
  70                         get {   return _tdsState; }
  71                 }
  72
  73                 public WaitHandle AsyncWaitHandle
  74                 {
  75                         get { return _waitHandle; }
  76
  77                 }
  78
  79                 public bool IsCompleted
  80                 {
  81                         get {   return _completed; }
  82                 }
  83
  84                 public bool IsCompletedWithException
  85                 {
  86                         get {   return _exception != null; }
  87                 }
  88
  89                 public Exception Exception
  90                 {
  91                         get {   return _exception; }
  92                 }
  93
  94                 public bool CompletedSynchronously
  95                 {
  96                         get {   return _completedSyncly; }
  97                 }
  98
  99                 internal object ReturnValue
 100                 {
 101                         get {   return _retValue; }
 102                         set {   _retValue = value; }
 103                 }
 104
 105                 internal void MarkComplete ()
 106                 {
 107                         _completed = true;
 108                         _exception = null;
 109                         ((ManualResetEvent)_waitHandle).Set ();
 110
 111                         if (_userCallback != null)
 112                                 _userCallback (this);
 113                 }
 114
 115                 internal void MarkComplete (Exception e)
 116                 {
 117                         _completed = true;
 118                         _exception = e;
 119                         ((ManualResetEvent)_waitHandle).Set ();
 120
 121                         if (_userCallback != null)
 122                                 _userCallback (this);
 123                 }
 124         }
 125 }
 126