--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/datacommsserver/esockserver/ssock/ss_mbufif.cpp	Thu Dec 17 09:22:25 2009 +0200
@@ -0,0 +1,120 @@
+// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#include <ss_std.h>
+#include <es_mbufif.h>
+#include <comms-infras/ss_flowbinders.h>
+
+using namespace ESock;
+
+// the CWaitForMBufs active object class is used to handle an out of mbufs 
+// condition during CServProviderBaseMBuf::Write. If a normal allocation fails 
+// then one of these AOs is created to wait on mbufs becomign available.
+//
+// when they are, this AO calls CanSend on the socket, which results
+// in Write being called, which should now be able to complete successfully.
+// 
+
+
+CWaitForMBufs* CWaitForMBufs::NewL(MSessionDataNotify* aSocket)
+	{
+	CWaitForMBufs* self = new(ELeave) CWaitForMBufs(aSocket);
+	CleanupStack::PushL(self);
+	self->ConstructL();
+	CleanupStack::Pop();
+	return self;
+	}
+
+CWaitForMBufs::CWaitForMBufs(MSessionDataNotify* aSocket) 
+: CActive(0),
+  iSocket(aSocket)
+	{
+	}
+
+void CWaitForMBufs::ConstructL()
+	{
+	CActiveScheduler::Add(this);
+	}
+
+CWaitForMBufs::~CWaitForMBufs()  
+	{
+	Cancel();
+	iMBufChain.Free();
+	}
+
+// from CActive
+void CWaitForMBufs::RunL()     
+	{
+	iMBufChain.Free();
+	if(iSignalCanSend)
+		{
+		iSignalCanSend = EFalse;  //Has to be before because CanSend can re-request
+		iSocket->CanSend();
+		}
+	if(iSignalNewData)
+		{
+		iSignalNewData = EFalse;  //Has to be before because CanSend can re-request
+		iSocket->NewData(0);
+		}
+	}
+
+void CWaitForMBufs::DoCancel() 
+	{
+		iSignalNewData = EFalse;  
+		iSignalCanSend = EFalse;
+		iRequest.Cancel();
+	}
+
+// requests
+
+void CWaitForMBufs::CancelNewData() 
+	{
+	iSignalNewData = EFalse;  
+	if (!iSignalNewData && !iSignalCanSend)
+		{
+		iRequest.Cancel();
+		}
+	}
+
+void CWaitForMBufs::CancelCanSend() 
+	{
+	iSignalCanSend = EFalse;
+	if (!iSignalNewData && !iSignalCanSend)
+		{
+		iRequest.Cancel();
+		}
+	}
+	
+void CWaitForMBufs::AllocWaitAndSignalNewData(TUint aSize)
+
+	{
+	if(!IsActive())
+		{
+		iRequest.Alloc(iMBufChain, aSize, iStatus);
+		SetActive();
+		}
+	iSignalNewData = ETrue;
+	}
+
+void CWaitForMBufs::AllocWaitAndSignalCanSend(TUint aSize)
+	{
+	if(!IsActive())
+		{
+		iRequest.Alloc(iMBufChain, aSize, iStatus);
+		SetActive();
+		}
+	iSignalCanSend = ETrue;
+	}
+