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Diffstat (limited to 'OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs')
-rw-r--r--OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs183
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diff --git a/OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs b/OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs
deleted file mode 100644
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--- a/OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs
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1/*
2 * Copyright (c) Contributors, http://opensimulator.org/
3 * See CONTRIBUTORS.TXT for a full list of copyright holders.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the OpenSim Project nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28using System;
29using System.Threading;
30
31namespace OpenSim.Framework.Communications
32{
33 internal class SimpleAsyncResult : IAsyncResult
34 {
35 private readonly AsyncCallback m_callback;
36
37 /// <summary>
38 /// Is process completed?
39 /// </summary>
40 /// <remarks>Should really be boolean, but VolatileRead has no boolean method</remarks>
41 private byte m_completed;
42
43 /// <summary>
44 /// Did process complete synchroneously?
45 /// </summary>
46 /// <remarks>I have a hard time imagining a scenario where this is the case, again, same issue about
47 /// booleans and VolatileRead as m_completed
48 /// </remarks>
49 private byte m_completedSynchronously;
50
51 private readonly object m_asyncState;
52 private ManualResetEvent m_waitHandle;
53 private Exception m_exception;
54
55 internal SimpleAsyncResult(AsyncCallback cb, object state)
56 {
57 m_callback = cb;
58 m_asyncState = state;
59 m_completed = 0;
60 m_completedSynchronously = 1;
61 }
62
63 #region IAsyncResult Members
64
65 public object AsyncState
66 {
67 get { return m_asyncState; }
68 }
69
70 public WaitHandle AsyncWaitHandle
71 {
72 get
73 {
74 if (m_waitHandle == null)
75 {
76 bool done = IsCompleted;
77 ManualResetEvent mre = new ManualResetEvent(done);
78 if (Interlocked.CompareExchange(ref m_waitHandle, mre, null) != null)
79 {
80 mre.Close();
81 }
82 else
83 {
84 if (!done && IsCompleted)
85 {
86 m_waitHandle.Set();
87 }
88 }
89 }
90 return m_waitHandle;
91 }
92 }
93
94
95 public bool CompletedSynchronously
96 {
97 get { return Thread.VolatileRead(ref m_completedSynchronously) == 1; }
98 }
99
100
101 public bool IsCompleted
102 {
103 get { return Thread.VolatileRead(ref m_completed) == 1; }
104 }
105
106 #endregion
107
108 #region class Methods
109
110 internal void SetAsCompleted(bool completedSynchronously)
111 {
112 m_completed = 1;
113 if (completedSynchronously)
114 m_completedSynchronously = 1;
115 else
116 m_completedSynchronously = 0;
117
118 SignalCompletion();
119 }
120
121 internal void HandleException(Exception e, bool completedSynchronously)
122 {
123 m_completed = 1;
124 if (completedSynchronously)
125 m_completedSynchronously = 1;
126 else
127 m_completedSynchronously = 0;
128 m_exception = e;
129
130 SignalCompletion();
131 }
132
133 private void SignalCompletion()
134 {
135 if (m_waitHandle != null) m_waitHandle.Set();
136
137 if (m_callback != null) m_callback(this);
138 }
139
140 public void EndInvoke()
141 {
142 // This method assumes that only 1 thread calls EndInvoke
143 if (!IsCompleted)
144 {
145 // If the operation isn't done, wait for it
146 AsyncWaitHandle.WaitOne();
147 AsyncWaitHandle.Close();
148 m_waitHandle = null; // Allow early GC
149 }
150
151 // Operation is done: if an exception occured, throw it
152 if (m_exception != null) throw m_exception;
153 }
154
155 #endregion
156 }
157
158 internal class AsyncResult<T> : SimpleAsyncResult
159 {
160 private T m_result = default(T);
161
162 public AsyncResult(AsyncCallback asyncCallback, Object state) :
163 base(asyncCallback, state)
164 {
165 }
166
167 public void SetAsCompleted(T result, bool completedSynchronously)
168 {
169 // Save the asynchronous operation's result
170 m_result = result;
171
172 // Tell the base class that the operation completed
173 // sucessfully (no exception)
174 base.SetAsCompleted(completedSynchronously);
175 }
176
177 public new T EndInvoke()
178 {
179 base.EndInvoke();
180 return m_result;
181 }
182 }
183}
generated by cgit v1.1 at 2024-11-16 13:51:16 +0000