// Copyright (c) 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:

// 

#ifndef APIWRAPPER_H

#define APIWRAPPER_H

#ifndef PSU_PLATFORMTHREADING_H

#include "platformthreading.h"

#endif

#ifndef PSU_PLATFORMTYPES_H

#include "platformtypes.h"

#endif

#include "remotefunctioncall.h"

class RemoteFunctionCall;

class MGraphicsVHWCallback;

class APIWrapperStack

{

    public:

        APIWrapperStack(): iStack( NULL ), iStackIndex(0), iStackSize(0)

        {

        }

        bool InitStack( int stackSize )

        {

            if ( iStack )

            {

                delete [] iStack;

            }

            iStack = (char*)new unsigned long[(stackSize+3)/4];

            iStackIndex = 0;

            iStackSize = stackSize;

            return iStack != NULL;

        }

        void* AllocFromStack( int size, int alignment )

        {

            unsigned int adjustedIndex = RemoteFunctionCallData::AlignIndex( iStackIndex, alignment );

            if ( adjustedIndex + size < iStackSize )

            {

                iStackIndex = adjustedIndex + size;

                return (void*)(iStack + adjustedIndex);

            }

            else

            {

                return NULL;

            }

        }

        void ClearStack()

        {

            iStackIndex = 0;

        }

        ~APIWrapperStack()

        {

            delete [] iStack;

            iStack = NULL;

        }

    private:

        char* iStack;

        unsigned int iStackIndex;

        unsigned int iStackSize;

};

class APIWrapper

{

public:

	virtual ~APIWrapper();

	//void SetCurrentRFC(  );

	virtual void SetProcessInformation( TUint32 aProcess, TUint32 aThread ) = 0;

	virtual void Cleanup( TUint32 aProcess, TUint32 aThread ) = 0;

    virtual int DispatchRequest( unsigned long aCode ) = 0;

protected:

    APIWrapper( RemoteFunctionCallData& currentFunctionCall, 

		APIWrapperStack* stack,

        void* result,

		MGraphicsVHWCallback* serviceIf);

	virtual int WriteReply();

protected:

	RemoteFunctionCallData& m_currentFunctionCallData;

    void* m_currentResult;

    APIWrapperStack* iStack;

    MGraphicsVHWCallback* iServiceIf;

};

#endif