diff -r 000000000000 -r dfb7c4ff071f serialserver/packetloopbackcsy/src/FlowControlChange.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/serialserver/packetloopbackcsy/src/FlowControlChange.cpp	Thu Dec 17 09:22:25 2009 +0200
@@ -0,0 +1,95 @@
+// Copyright (c) 2004-2009 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:
+// Implementation of class CFlowControlChange
+// 
+//
+
+/**
+ @file
+*/
+
+#include <e32property.h>
+
+#include "LoopbackConfig.h"
+#include "FlowControlChange.h"
+
+CFlowControlChange* CFlowControlChange::NewL(TUint aUnit, MFlowControlChangeCallBack* aCallback)
+	{
+	CFlowControlChange* self = new (ELeave) CFlowControlChange(aUnit, aCallback);
+	return self;
+	}
+
+CFlowControlChange::CFlowControlChange(TUint aUnit, MFlowControlChangeCallBack* aCallback)
+	: CActive(EPriorityStandard), iCallback(aCallback), iUnit(aUnit), iFlowControlIsOn(EFalse)
+	{
+	CActiveScheduler::Add(this);
+
+	TBool flowControlIsOn = EFalse;
+	iProperty.Attach(KUidPSCsyFlowControlCategory, iUnit);
+	iProperty.Subscribe(iStatus);
+	TInt ret = RProperty::Get(KUidPSCsyFlowControlCategory, iUnit, flowControlIsOn);
+	if (ret == KErrNone)
+		iFlowControlIsOn = flowControlIsOn;
+	SetActive();
+	}
+	
+CFlowControlChange::~CFlowControlChange()
+	{
+	Cancel();
+	iProperty.Close();
+	}
+
+/** 
+ @return ETrue if flow control is currently on, EFalse if it is not
+ */
+TBool CFlowControlChange::FlowControlIsOn() const
+	{
+	return iFlowControlIsOn;
+	}
+
+/**
+ Stops listening for changes to flow control
+ */
+void CFlowControlChange::DoCancel()
+	{
+	iProperty.Cancel();
+	}
+
+/**
+ Notifies the callback of a change in flow control, and resubscribes to obtain future notifications of property changes
+ */
+void CFlowControlChange::RunL()
+	{
+	User::LeaveIfError(KErrNone);	// To prevent LeaveScan warning
+
+	// Resubscribe before retrieving the value so we don't miss any changes
+	TInt status = iStatus.Int();
+	iProperty.Subscribe(iStatus);
+	SetActive();
+	
+	TBool flowControlIsOn = EFalse;
+	if(status == KErrNone)
+		{
+		RProperty::Get(KUidPSCsyFlowControlCategory, iUnit, flowControlIsOn);
+		}
+	if (flowControlIsOn != iFlowControlIsOn)
+		{
+		iFlowControlIsOn = flowControlIsOn;
+		if (iFlowControlIsOn)
+			iCallback->StartFlowControl();
+		else
+			iCallback->StopFlowControl();
+		}
+	}
+