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// Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// Handler for BTrace kernel categories
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//
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#ifndef __BTRACEKERNELCATEGORYHANDLER_H__
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#define __BTRACEKERNELCATEGORYHANDLER_H__
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// Include files
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#include <kernel/kernel.h>
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#include "BTraceCategoryHandler.h"
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#include "TraceCoreActivation.h"
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// Forward declarations
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class DBTraceOstCategoryBitmap;
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/**
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* Category handler for Symbian BTrace categories.
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*/
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NONSHARABLE_CLASS( DBTraceKernelCategoryHandler ) : public DBTraceCategoryHandler, public MTraceCoreActivationNotification
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{
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public:
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/**
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* Constructor
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*/
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DBTraceKernelCategoryHandler();
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/**
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* Destructor
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*/
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~DBTraceKernelCategoryHandler();
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/**
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* Initializes this handler
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*
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* @return one of the standard error codes
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*/
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TInt Init();
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/**
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* Called before writer is changed
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*
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* @param aWriter The new writer
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*/
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void PrepareSetWriter( DTraceCoreWriter* aWriter );
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/**
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* Primes the BTrace kernel categories
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*/
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void PrimeKernelCategories();
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private:
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/**
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* Notification that the activation state has changed
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*
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* @param aActivation the activation interface that was updated
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* @param aFromSettings ETrue if activation was due to settings read, EFalse if from some other source
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* @param aComponentId Component ID of the activation
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*/
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void ActivationChanged( MTraceCoreActivation& aActivation, TBool aFromSettings,
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TUint32 aComponentId);
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/**
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* MTraceCoreBTraceCategoryHandler implementation for Symbian-specific BTrace categories
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*
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* @param aHeader BTrace header
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* @param aHeader2 Extra header data
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* @param aContext The thread context in which this function was called
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* @param a1 The first trace parameter
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* @param a2 The second trace parameter
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* @param a3 The third trace parameter
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* @param aExtra Extra trace data
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* @param aPc The program counter value
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* @return ETrue if trace was processed
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*/
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TBool HandleFrame( TUint32 aHeader, TUint32 aHeader2, const TUint32 aContext,
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const TUint32 a1, const TUint32 a2, const TUint32 a3,
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const TUint32 aExtra, const TUint32 aPc );
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/**
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* Maps the BTrace category / sub-category to group / trace ID
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*
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* @param aCategory The BTrace category
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* @param aSubCategory The BTrace sub-categoory
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* @return the group / trace ID combination
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*/
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TUint32 MapCategoryToID( TUint8 aCategory, TUint8 aSubCategory );
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/**
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* Dfc function to prime the kernel categories
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*
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* @param aHandler pointer to this handler
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*/
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static void PrimeDfc( TAny* aHandler );
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/**
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* Called from the static DFC function to prime kernel categories
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*/
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void PrimeDfc();
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/**
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* Primes a category
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*
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* @param aCategory the category to be primed
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*/
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void PrimeCategory( TUint8 aCategory );
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private:
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/**
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* Handles this Multipart trace
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*
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* @param aHeader BTrace header
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* @param aHeader2 Extra header data
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* @param aContext The thread context in which this function was called
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* @param aTotalMessageLength Total message length of this multipart message
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* @param aComponentId Component ID
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* @param aData The data
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* @param aExtra Extra trace data
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* @param aPc The program counter value
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*/
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TBool HandleMultiPart( TUint32 aHeader, TUint32 aHeader2, const TUint32 aContext,
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const TUint32 aTotalMessageLength, const TUint32 aComponentId,
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const TUint32 aData, const TUint32 aExtra, const TUint32 aPc );
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/**
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* Checks if given trace is a Multipart trace
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*
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* @param aHeader Header data
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* @param aHeader2 Extra header data
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*/
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inline TBool CheckMultiPart( TUint32 aHeader, TUint32 aHeader2 );
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/**
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* Calculates data start offset
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*
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* @param aHeader BTrace header
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*/
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TUint32 CalculateDataStartOffset( TUint32 aHeader );
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/**
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* This uses the same bitmap as the OST category handler
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*/
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DBTraceOstCategoryBitmap* iTraceBitmap;
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/**
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* Dfc used when priming kernel categories
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*/
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TDfc iPrimeDfc;
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/**
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* Saved activation item for multipart traces
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*/
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RArray< TMultiPartActivationInfo > iMultiPartActivationInfos;
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};
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#endif
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// End of File
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