--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sysstatemgmt/systemstatemgr/inc/ssmsystemwideproperty.h	Tue Feb 02 00:53:00 2010 +0200
@@ -0,0 +1,110 @@
+// Copyright (c) 2007-2009 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:
+//
+
+#ifndef __SSMSYSTEMWIDEPROPERTY_H__
+#define __SSMSYSTEMWIDEPROPERTY_H__
+
+#include <e32base.h>
+#include <e32property.h>
+
+#include <ssm/ssmswp.h>
+
+class CSsmPropertyMonitor;
+
+/**
+Read-only client interface to receive notifications when a
+System Wide Property's value is changed.
+
+The implementation is similar to RProperty so the general pitfalls
+of RProperties applies. I.e. if the value changes several times before 
+being read, only the last set value will be available. And to 
+avoid missing a second notification, subscribtion must be reissued 
+the first thing when you get a change notification, not after the 
+change have been handled.
+
+CSsmSystemWideProperty wraps this class in an active object.
+
+@see CSsmSystemWideProperty
+@publishedPartner
+@released
+*/
+NONSHARABLE_CLASS(RSsmSystemWideProperty)
+	{
+public:
+	IMPORT_C TInt Connect(TUint aSwpKey);
+	TInt Connect(TUint aSwpKey, TUid aProcessSid);
+	IMPORT_C void Close();
+	IMPORT_C TInt GetValue(TInt& aValue) const;
+	IMPORT_C void Subscribe(TRequestStatus& aStatus);
+	IMPORT_C void SubscribeCancel();	
+	
+private:
+	TUint iKey;
+	RProperty iProperty;
+	TInt iSpare[4];
+	};
+
+/**
+Interface to implement for clients that want to use the @c CSsmSystemWideProperty 
+utility class.
+
+@publishedPartner
+@released
+*/
+class MSwpChangeNotificationSubscriber
+    {
+public:
+	/** 
+	@c SwpChanged is called when the value of the subscribed Swp have changed
+	@param aSwp contains the new value for the monitored Swp
+	*/
+	virtual void SwpChanged(TSsmSwp aSwp) = 0;
+	};	
+
+/**
+Utility class for monitoring a system Wide Property. Maintains a list of 
+subscribers that share a single active object. When the monitored 
+Sytem Wide Property  changes the subscribers will be notified in the order
+they were added to the list of subscribers.
+
+@see RSsmSystemWideProperty
+@publishedPartner
+@released
+*/
+NONSHARABLE_CLASS(CSsmSystemWideProperty) : public CBase
+	{
+public:
+	IMPORT_C static CSsmSystemWideProperty* NewL(TUint aSwpKey);
+	IMPORT_C static CSsmSystemWideProperty* NewLC(TUint aSwpKey);
+	static CSsmSystemWideProperty* NewLC(TUint aSwpKey, TUid aProcessSid);
+	IMPORT_C ~CSsmSystemWideProperty();
+	IMPORT_C TInt GetValue(TSsmSwp& aSwp) const;
+	IMPORT_C void AddSubscriberL(MSwpChangeNotificationSubscriber& aSubscriber);	
+	IMPORT_C void RemoveSubscriber(const MSwpChangeNotificationSubscriber& aSubscriber);
+	//for CSsmPropertyMonitor
+	void NotifySubscribers(TSsmSwp aSwp);
+	
+private:
+	CSsmSystemWideProperty();
+	void ConstructL(TUint aSwpKey, TUid aProcessSid);
+	
+private:
+	RPointerArray<MSwpChangeNotificationSubscriber> iSubscribers; // Elements of the array are not owned.
+	CSsmPropertyMonitor* iMonitor;
+	TInt iSpare[4];
+	};
+	
+	
+#endif