1 files changed, 156 insertions, 0 deletions
diff --git a/OpenSim/Framework/Communications/GenericAsyncResult.cs b/OpenSim/Framework/Communications/GenericAsyncResult.cs
new file mode 100644
index 0000000..ed41614
--- /dev/null
+++ b/OpenSim/Framework/Communications/GenericAsyncResult.cs
@@ -0,0 +1,156 @@
+using System;
+using System.Threading;
+namespace OpenSim.Framework.Communications
+{
+    internal class SimpleAsyncResult : IAsyncResult
+    {
+        private readonly AsyncCallback m_callback;
+        /// <summary>
+        /// Is process completed?
+        /// </summary>
+        /// <remarks>Should really be boolean, but VolatileRead has no boolean method</remarks>
+        private byte m_completed;
+        /// <summary>
+        /// Did process complete synchroneously?
+        /// </summary>
+        /// <remarks>I have a hard time imagining a scenario where this is the case, again, same issue about
+        /// booleans and VolatileRead as m_completed
+        /// </remarks>
+        private byte m_completedSynchronously;
+        private readonly object m_asyncState;
+        private ManualResetEvent m_waitHandle;
+        private Exception m_exception;
+        internal SimpleAsyncResult(AsyncCallback cb, object state)
+        {
+            m_callback = cb;
+            m_asyncState = state;
+            m_completed = 0;
+            m_completedSynchronously = 1;
+        }
+        #region IAsyncResult Members
+        public object AsyncState
+        {
+            get { return m_asyncState; }
+        }
+        public WaitHandle AsyncWaitHandle
+        {
+            get
+            {
+                if (m_waitHandle == null)
+                {
+                    bool done = IsCompleted;
+                    ManualResetEvent mre = new ManualResetEvent(done);
+                    if (Interlocked.CompareExchange(ref m_waitHandle, mre, null) != null)
+                    {
+                        mre.Close();
+                    }
+                    else
+                    {
+                        if (!done && IsCompleted)
+                        {
+                            m_waitHandle.Set();
+                        }
+                    }
+                }
+                return m_waitHandle;
+            }
+        }
+        public bool CompletedSynchronously
+        {
+            get { return Thread.VolatileRead(ref m_completedSynchronously) == 1; }
+        }
+        public bool IsCompleted
+        {
+            get { return Thread.VolatileRead(ref m_completed) == 1; }
+        }
+        #endregion
+        #region class Methods
+        internal void SetAsCompleted(bool completedSynchronously)
+        {
+            m_completed = 1;
+            if (completedSynchronously)
+                m_completedSynchronously = 1;
+            else
+                m_completedSynchronously = 0;
+            SignalCompletion();
+        }
+        internal void HandleException(Exception e, bool completedSynchronously)
+        {
+            m_completed = 1;
+            if (completedSynchronously)
+                m_completedSynchronously = 1;
+            else
+                m_completedSynchronously = 0;
+            m_exception = e;
+            SignalCompletion();
+        }
+        private void SignalCompletion()
+        {
+            if (m_waitHandle != null) m_waitHandle.Set();
+            if (m_callback != null) m_callback(this);
+        }
+        public void EndInvoke()
+        {
+            // This method assumes that only 1 thread calls EndInvoke 
+            if (!IsCompleted)
+            {
+                // If the operation isn't done, wait for it
+                AsyncWaitHandle.WaitOne();
+                AsyncWaitHandle.Close();
+                m_waitHandle = null; // Allow early GC
+            }
+            // Operation is done: if an exception occured, throw it
+            if (m_exception != null) throw m_exception;
+        }
+        #endregion
+    }
+    internal class AsyncResult<T> : SimpleAsyncResult
+    {
+        private T m_result = default(T);
+        public AsyncResult(AsyncCallback asyncCallback, Object state) :
+            base(asyncCallback, state)
+        {
+        }
+        public void SetAsCompleted(T result, bool completedSynchronously)
+        {
+            // Save the asynchronous operation's result
+            m_result = result;
+            // Tell the base class that the operation completed 
+            // sucessfully (no exception)
+            base.SetAsCompleted(completedSynchronously);
+        }
+        public new T EndInvoke()
+        {
+            base.EndInvoke();
+            return m_result;
+        }
+    }
+}
+\ No newline at end of file

diff --git a/OpenSim/Framework/Communications/GenericAsyncResult.cs b/OpenSim/Framework/Communications/GenericAsyncResult.cs new file mode 100644 index 0000000..ed41614 --- /dev/null +++ b/OpenSim/Framework/Communications/GenericAsyncResult.cs
@@ -0,0 +1,156 @@
	1	using System;
	2	using System.Threading;
	3
	4	namespace OpenSim.Framework.Communications
	5	{
	6	internal class SimpleAsyncResult : IAsyncResult
	7	{
	8	private readonly AsyncCallback m_callback;
	9
	10	/// <summary>
	11	/// Is process completed?
	12	/// </summary>
	13	/// <remarks>Should really be boolean, but VolatileRead has no boolean method</remarks>
	14	private byte m_completed;
	15
	16	/// <summary>
	17	/// Did process complete synchroneously?
	18	/// </summary>
	19	/// <remarks>I have a hard time imagining a scenario where this is the case, again, same issue about
	20	/// booleans and VolatileRead as m_completed
	21	/// </remarks>
	22	private byte m_completedSynchronously;
	23
	24	private readonly object m_asyncState;
	25	private ManualResetEvent m_waitHandle;
	26	private Exception m_exception;
	27
	28	internal SimpleAsyncResult(AsyncCallback cb, object state)
	29	{
	30	m_callback = cb;
	31	m_asyncState = state;
	32	m_completed = 0;
	33	m_completedSynchronously = 1;
	34	}
	35
	36	#region IAsyncResult Members
	37
	38	public object AsyncState
	39	{
	40	get { return m_asyncState; }
	41	}
	42
	43	public WaitHandle AsyncWaitHandle
	44	{
	45	get
	46	{
	47	if (m_waitHandle == null)
	48	{
	49	bool done = IsCompleted;
	50	ManualResetEvent mre = new ManualResetEvent(done);
	51	if (Interlocked.CompareExchange(ref m_waitHandle, mre, null) != null)
	52	{
	53	mre.Close();
	54	}
	55	else
	56	{
	57	if (!done && IsCompleted)
	58	{
	59	m_waitHandle.Set();
	60	}
	61	}
	62	}
	63	return m_waitHandle;
	64	}
	65	}
	66
	67
	68	public bool CompletedSynchronously
	69	{
	70	get { return Thread.VolatileRead(ref m_completedSynchronously) == 1; }
	71	}
	72
	73
	74	public bool IsCompleted
	75	{
	76	get { return Thread.VolatileRead(ref m_completed) == 1; }
	77	}
	78
	79	#endregion
	80
	81	#region class Methods
	82
	83	internal void SetAsCompleted(bool completedSynchronously)
	84	{
	85	m_completed = 1;
	86	if (completedSynchronously)
	87	m_completedSynchronously = 1;
	88	else
	89	m_completedSynchronously = 0;
	90
	91	SignalCompletion();
	92	}
	93
	94	internal void HandleException(Exception e, bool completedSynchronously)
	95	{
	96	m_completed = 1;
	97	if (completedSynchronously)
	98	m_completedSynchronously = 1;
	99	else
	100	m_completedSynchronously = 0;
	101	m_exception = e;
	102
	103	SignalCompletion();
	104	}
	105
	106	private void SignalCompletion()
	107	{
	108	if (m_waitHandle != null) m_waitHandle.Set();
	109
	110	if (m_callback != null) m_callback(this);
	111	}
	112
	113	public void EndInvoke()
	114	{
	115	// This method assumes that only 1 thread calls EndInvoke
	116	if (!IsCompleted)
	117	{
	118	// If the operation isn't done, wait for it
	119	AsyncWaitHandle.WaitOne();
	120	AsyncWaitHandle.Close();
	121	m_waitHandle = null; // Allow early GC
	122	}
	123
	124	// Operation is done: if an exception occured, throw it
	125	if (m_exception != null) throw m_exception;
	126	}
	127
	128	#endregion
	129	}
	130
	131	internal class AsyncResult<T> : SimpleAsyncResult
	132	{
	133	private T m_result = default(T);
	134
	135	public AsyncResult(AsyncCallback asyncCallback, Object state) :
	136	base(asyncCallback, state)
	137	{
	138	}
	139
	140	public void SetAsCompleted(T result, bool completedSynchronously)
	141	{
	142	// Save the asynchronous operation's result
	143	m_result = result;
	144
	145	// Tell the base class that the operation completed
	146	// sucessfully (no exception)
	147	base.SetAsCompleted(completedSynchronously);
	148	}
	149
	150	public new T EndInvoke()
	151	{
	152	base.EndInvoke();
	153	return m_result;
	154	}
	155	}
	156	} \ No newline at end of file