diff -r a151135b0cf9 -r aa2539c91954 tracesrv/tracecore/btrace_handler/inc/TraceCoreSubscriber.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tracesrv/tracecore/btrace_handler/inc/TraceCoreSubscriber.h	Fri Oct 08 14:56:39 2010 +0300
@@ -0,0 +1,126 @@
+// Copyright (c) 2007-2010 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:
+// Base class for subscribers of TraceCore
+//
+
+#ifndef __TRACECORESUBSCRIBER_H__
+#define __TRACECORESUBSCRIBER_H__
+
+#ifdef __KERNEL_MODE__
+// Include files
+#include <kernel/kernel.h>
+#endif // __KERNEL_MODE__
+
+/**
+ * Header format
+ */	
+enum TMessageHeaderFormat
+	{
+	/**
+	 * Proprietary Format (Header Format 0 is also considered as proprietary)
+	 */
+	EMessageHeaderFormatProprietary = 1,
+	EMessageHeaderFormatOst         = 2
+	
+	};
+
+
+/**
+ * Trace Message
+ */
+class TTraceMessage
+	{
+public:
+	TMessageHeaderFormat iMsgFormat;
+	TDesC8 *iHeader;
+	TDesC8 *iData;
+	TUint8 iMessageId;
+	};
+
+#ifdef __KERNEL_MODE__
+
+// Forward declarations
+class MTraceCoreMessageSender;
+
+/**
+ * Base class for subscribers of TraceCore
+ */
+class DTraceCoreSubscriber : public DBase
+    {
+public:
+
+    /**
+     * Constructor
+     */
+    IMPORT_C DTraceCoreSubscriber();
+
+    /**
+     * Destructor
+     */
+    IMPORT_C ~DTraceCoreSubscriber();
+    
+    /**
+     * Subscribes to a message by message ID / protocol ID
+     * depending of the header format. First byte of aMessageID is always used
+     * for header format.
+     * 
+     * @param aMessageId The message ID to be subscribed
+     * @param aMsgFormat Message format e.g. EMessageHeaderFormatOst
+     */
+    IMPORT_C TInt Subscribe( TUint32 aMessageID, TMessageHeaderFormat aHeaderFormat );
+    
+    /**
+     * Subscribes to message ID
+     * 
+     * @param aMessageId The ID to subscribe
+     */
+    IMPORT_C TInt Subscribe( TUint32 aMessageID );
+
+    /**
+     * Unsubscribes from message ID
+     * 
+     * @param aMessageId The ID to unsubscribe
+     */
+    IMPORT_C void Unsubscribe( TUint32 aMessageID );
+    
+    /**
+     * Callback function for messages
+     */
+    virtual void MessageReceived( TTraceMessage &aMsg ) = 0;
+
+    /**
+     * Sets the message sender interface. This is called during Subscribe
+     */
+    void SetMessageSender( MTraceCoreMessageSender& aMessageSender );
+    
+private:
+
+    /**
+     * Unsubscribes all message ID's of this subscriber. Called from destructor
+     */
+    void Unsubscribe();
+
+protected:
+
+    /**
+     * Message sender interface
+     */
+    MTraceCoreMessageSender* iMessageSender;
+    };
+
+#endif // __KERNEL_MODE__
+
+#endif // __TRACECORESUBSCRIBER_H__
+
+// End of File