mcs/class/System.Data/System.Data.SqlClient/SqlAsyncResult.cs

   1 //
   2 // System.Data.SqlClient.SqlAsyncResult.cs
   3 //
   4 // Author:
   5 //   T Sureshkumar <tsureshkumar@novell.com>
   6 //   Ankit Jain <radical@corewars.org>
   7 //
   8
   9 //
  10 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  11 //
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33
  34 #if NET_2_0
  35 using System;
  36 using System.Threading;
  37
  38 namespace System.Data.SqlClient
  39 {
  40         internal class SqlAsyncResult : IAsyncResult
  41         {
  42                 private SqlAsyncState   _sqlState;
  43                 private WaitHandle      _waitHandle;
  44                 private bool            _completed = false;
  45                 private bool            _completedSyncly = false;
  46                 private bool            _ended = false;
  47                 private AsyncCallback   _userCallback = null;
  48                 private object          _retValue;
  49                 private string          _endMethod;
  50                 private IAsyncResult    _internal;
  51
  52                 public SqlAsyncResult (AsyncCallback userCallback, SqlAsyncState sqlState)
  53                 {
  54                         _sqlState = sqlState;
  55                         _userCallback = userCallback;
  56                         _waitHandle = new ManualResetEvent (false);
  57                 }
  58
  59                 public SqlAsyncResult (AsyncCallback userCallback, object state)
  60                 {
  61                         _sqlState = new SqlAsyncState (state);
  62                         _userCallback = userCallback;
  63                         _waitHandle = new ManualResetEvent (false);
  64                 }
  65
  66                 public object AsyncState
  67                 {
  68                         get {   return _sqlState.UserState; }
  69                 }
  70
  71                 internal SqlAsyncState SqlAsyncState
  72                 {
  73                         get {   return _sqlState; }
  74                 }
  75
  76                 public WaitHandle AsyncWaitHandle
  77                 {
  78                         get { return _waitHandle; }
  79
  80                 }
  81
  82                 public bool IsCompleted
  83                 {
  84                         get {   return _completed; }
  85                 }
  86
  87                 public bool CompletedSynchronously
  88                 {
  89                         get {   return _completedSyncly; }
  90                 }
  91
  92                 internal object ReturnValue
  93                 {
  94                         get {   return _retValue; }
  95                         set {   _retValue = value; }
  96                 }
  97
  98                 public string EndMethod
  99                 {
 100                         get {   return _endMethod; }
 101                         set {   _endMethod = value; }
 102                 }
 103
 104                 public bool Ended
 105                 {
 106                         get {   return _ended; }
 107                         set {   _ended = value; }
 108                 }
 109
 110
 111                 internal IAsyncResult InternalResult
 112                 {
 113                         get {   return _internal; }
 114                         set {   _internal = value; }
 115                 }
 116
 117                 public AsyncCallback BubbleCallback
 118                 {
 119                         get { return new AsyncCallback (Bubbleback); }
 120
 121                 }
 122
 123                 internal void MarkComplete ()
 124                 {
 125                         _completed = true;
 126                         ((ManualResetEvent)_waitHandle).Set ();
 127
 128                         if (_userCallback != null)
 129                                 _userCallback (this);
 130                 }
 131
 132                 public void Bubbleback (IAsyncResult ar)
 133                 {
 134                         this.MarkComplete ();
 135                 }
 136         }
 137 }
 138
 139 #endif // NET_2_0