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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Channels
{
using System.Collections.Generic;
using System.Runtime;
using System.ServiceModel;
internal delegate IAsyncResult ChainedBeginHandler(TimeSpan timeout, AsyncCallback asyncCallback, object state);
internal delegate void ChainedEndHandler(IAsyncResult result);
class ChainedAsyncResult : AsyncResult
{
ChainedBeginHandler begin2;
ChainedEndHandler end1;
ChainedEndHandler end2;
TimeoutHelper timeoutHelper;
static AsyncCallback begin1Callback = Fx.ThunkCallback(new AsyncCallback(Begin1Callback));
static AsyncCallback begin2Callback = Fx.ThunkCallback(new AsyncCallback(Begin2Callback));
protected ChainedAsyncResult(TimeSpan timeout, AsyncCallback callback, object state)
: base(callback, state)
{
this.timeoutHelper = new TimeoutHelper(timeout);
}
public ChainedAsyncResult(TimeSpan timeout, AsyncCallback callback, object state, ChainedBeginHandler begin1, ChainedEndHandler end1, ChainedBeginHandler begin2, ChainedEndHandler end2)
: base(callback, state)
{
this.timeoutHelper = new TimeoutHelper(timeout);
Begin(begin1, end1, begin2, end2);
}
protected void Begin(ChainedBeginHandler begin1, ChainedEndHandler end1, ChainedBeginHandler begin2, ChainedEndHandler end2)
{
this.end1 = end1;
this.begin2 = begin2;
this.end2 = end2;
IAsyncResult result = begin1(this.timeoutHelper.RemainingTime(), begin1Callback, this);
if (!result.CompletedSynchronously)
return;
if (Begin1Completed(result))
{
this.Complete(true);
}
}
static void Begin1Callback(IAsyncResult result)
{
if (result.CompletedSynchronously)
return;
ChainedAsyncResult thisPtr = (ChainedAsyncResult)result.AsyncState;
bool completeSelf = false;
Exception completeException = null;
try
{
completeSelf = thisPtr.Begin1Completed(result);
}
#pragma warning suppress 56500 // covered by FxCOP
catch (Exception exception)
{
if (Fx.IsFatal(exception))
{
throw;
}
completeSelf = true;
completeException = exception;
}
if (completeSelf)
{
thisPtr.Complete(false, completeException);
}
}
bool Begin1Completed(IAsyncResult result)
{
end1(result);
result = begin2(this.timeoutHelper.RemainingTime(), begin2Callback, this);
if (!result.CompletedSynchronously)
return false;
end2(result);
return true;
}
static void Begin2Callback(IAsyncResult result)
{
if (result.CompletedSynchronously)
return;
ChainedAsyncResult thisPtr = (ChainedAsyncResult)result.AsyncState;
Exception completeException = null;
try
{
thisPtr.end2(result);
}
#pragma warning suppress 56500 // covered by FxCOP
catch (Exception exception)
{
if (Fx.IsFatal(exception))
{
throw;
}
completeException = exception;
}
thisPtr.Complete(false, completeException);
}
public static void End(IAsyncResult result)
{
AsyncResult.End<ChainedAsyncResult>(result);
}
}
internal class ChainedCloseAsyncResult : ChainedAsyncResult
{
IList<ICommunicationObject> collection;
public ChainedCloseAsyncResult(TimeSpan timeout, AsyncCallback callback, object state, ChainedBeginHandler begin1, ChainedEndHandler end1, IList<ICommunicationObject> collection)
: base(timeout, callback, state)
{
this.collection = collection;
Begin(BeginClose, EndClose, begin1, end1);
}
public ChainedCloseAsyncResult(TimeSpan timeout, AsyncCallback callback, object state, ChainedBeginHandler begin1, ChainedEndHandler end1, params ICommunicationObject[] objs)
: base(timeout, callback, state)
{
collection = new List<ICommunicationObject>();
if (objs != null)
for (int index = 0; index < objs.Length; index++)
if (objs[index] != null)
collection.Add(objs[index]);
Begin(BeginClose, EndClose, begin1, end1);
}
IAsyncResult BeginClose(TimeSpan timeout, AsyncCallback callback, object state)
{
return new CloseCollectionAsyncResult(timeout, callback, state, collection);
}
void EndClose(IAsyncResult result)
{
CloseCollectionAsyncResult.End((CloseCollectionAsyncResult)result);
}
}
internal class ChainedOpenAsyncResult : ChainedAsyncResult
{
IList<ICommunicationObject> collection;
public ChainedOpenAsyncResult(TimeSpan timeout, AsyncCallback callback, object state, ChainedBeginHandler begin1, ChainedEndHandler end1, IList<ICommunicationObject> collection)
: base(timeout, callback, state)
{
this.collection = collection;
Begin(begin1, end1, BeginOpen, EndOpen);
}
public ChainedOpenAsyncResult(TimeSpan timeout, AsyncCallback callback, object state, ChainedBeginHandler begin1, ChainedEndHandler end1, params ICommunicationObject[] objs)
: base(timeout, callback, state)
{
collection = new List<ICommunicationObject>();
for (int index = 0; index < objs.Length; index++)
if (objs[index] != null)
collection.Add(objs[index]);
Begin(begin1, end1, BeginOpen, EndOpen);
}
IAsyncResult BeginOpen(TimeSpan timeout, AsyncCallback callback, object state)
{
return new OpenCollectionAsyncResult(timeout, callback, state, collection);
}
void EndOpen(IAsyncResult result)
{
OpenCollectionAsyncResult.End((OpenCollectionAsyncResult)result);
}
}
}
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