--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lowlevellibsandfws/apputils/src/BACNTF.CPP	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,129 @@
+// Copyright (c) 1997-2009 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:
+// Started by BLB, October 1996
+// Active object for tracking changes in TLocale
+// 
+//
+
+#include <bacntf.h>
+
+inline CEnvironmentChangeNotifier::CEnvironmentChangeNotifier(TInt aPriority)
+	: CActive(aPriority)
+	{__DECLARE_NAME(_S("CEnvironmentChangeNotifier"));}
+
+
+EXPORT_C CEnvironmentChangeNotifier* CEnvironmentChangeNotifier::NewL(TInt aPriority,const TCallBack& aCallBack)
+/** Constructs a new environment change notifier object with the specified active 
+object priority and callback function.
+
+The function requires a priority value for this active object and a reference 
+to a TCallBack object encapsulating a pointer to the call back function which 
+is to run when change events occur.
+
+As part of its implementation, the function:
+
+creates a Kernel side change notifier and opens a handle (an RChangeNotifier) 
+to it.
+
+adds this active object to the current active scheduler.
+
+Note that construction of the environment change notifier does not issue any 
+requests for change events.
+
+@param aPriority The priority of this active object. Priority values determine 
+the order in which an active scheduler handles completed active object requests.
+@param aCallBack A reference to a callback object which the caller must construct 
+to encapsulate the callback function. 
+@return A pointer to the new environment change notifier object.
+@see CEnvironmentChangeNotifier::Start()
+@see CActive::TPriority */
+	{
+	CEnvironmentChangeNotifier* This=new(ELeave) CEnvironmentChangeNotifier(aPriority);
+	This->iChangeNotifier.Create();
+	This->Set(aCallBack);
+	CActiveScheduler::Add(This);
+	return(This);
+	}
+
+EXPORT_C CEnvironmentChangeNotifier::~CEnvironmentChangeNotifier()
+/** Destructor. Frees all resources owned by the object, prior to its destruction.
+
+In particular, it cancels any outstanding request to the Kernel side change 
+notifier before closing the handle to it. */
+	{
+	Cancel();
+	iChangeNotifier.Close();
+	}
+
+EXPORT_C void CEnvironmentChangeNotifier::Start()
+/** Issues a request for change events.
+
+The request completes when change events occur, as signalled by the Kernel 
+side change notifier service. The request may also complete if it is cancelled 
+by calling the Cancel() member function of this active object.
+
+When change events occur, the callback function is called.
+
+Note that after the first call to this function, the callback function is 
+called immediately; this is because of the way the underlying change notifier 
+is implemented. The changes reported are all those defined by the TChanges 
+enum.
+
+@see CActive::Cancel()
+@see TChanges */
+	{
+	SetActive();
+	iChangeNotifier.Logon(iStatus);
+	}
+
+EXPORT_C TInt CEnvironmentChangeNotifier::Set(const TCallBack& aCallBack)
+/** Sets the callback function.
+
+A callback is normally set when this active object is constructed through 
+the NewL() function. This function replaces any existing callback object with 
+the specified callback object.
+
+@param aCallBack A reference to the call back object encapsulating the call 
+back function. 
+@return KErrNone if successful, KErrInUse if this active object currently has 
+an outstanding request for change events, or another of the system-wide error-codes. */
+	{
+	if (IsActive())
+		return(KErrInUse);
+	iCallBack=aCallBack;
+	return(KErrNone);
+	}
+
+void CEnvironmentChangeNotifier::RunL()
+//
+//	Active framework: Call the callback function
+//
+	{
+	iChange=iStatus.Int();
+	Start();
+	if (iChange!=0)
+		{
+		iCallBack.CallBack();
+		iChange=0;
+		}
+	}
+
+void CEnvironmentChangeNotifier::DoCancel()
+//
+//	Active framework: Cancel the current request
+//	
+	{
+	iChangeNotifier.LogonCancel();
+	}
+