/*

* Copyright (c) 2004-2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

* Class declaration for CBulkOnlyTransportUsbcLdd.

*

*/

/** 

 @file

 @internalTechnology

*/

#ifndef TBULKMM_H

#define TBULKMM_H

// Maximum size for SCSI Read10 Write10 and Verify10 commands

// Windows requests size of 64K whereas MAC requests size of 128K

static const TUint32 KMaxBufSize = 128 * 1024;

#ifdef MSDC_MULTITHREADED

class TBulkMm

{

public:

    TBulkMm();

    void GetNextTransferBuffer(TUint aLength, TPtr8& aPtr);

    void GetNextTransferBuffer(TPtr8& aPtr);

    TUint MaxTransferSize() const {return KMaxBufSize;}

    TUint8* Buf1();

    TUint8* Buf2();

private:

	TBuf8<KMaxBufSize> iDataBuf1;	// For data transfers (Reading and Writing)

	TBuf8<KMaxBufSize> iDataBuf2;

	TBool iSwap;

};

#else

class TBulkMm

{

public:

    TBulkMm() {};

    void GetNextTransferBuffer(TUint aLength, TPtr8& aPtr);

    void GetNextTransferBuffer(TPtr8& aPtr);

    TUint MaxTransferSize() const {return KMaxBufSize;}

private:

	TBuf8<KMaxBufSize> iDataBuf;

};

#endif

#ifdef MSDC_MULTITHREADED

inline TUint8* TBulkMm::Buf1()

{

    return const_cast<TUint8*>(iDataBuf1.Ptr());

}

inline TUint8* TBulkMm::Buf2()

{

    return const_cast<TUint8*>(iDataBuf2.Ptr());

}

inline void TBulkMm::GetNextTransferBuffer(TPtr8& aPtr)

	{

    GetNextTransferBuffer(KMaxBufSize, aPtr);

	}

#else

inline void TBulkMm::GetNextTransferBuffer(TUint aLength, TPtr8& aPtr)

	{

    iDataBuf.SetLength(aLength);

    aPtr.Set(iDataBuf.LeftTPtr(iDataBuf.Length()));

	}

inline void TBulkMm::GetNextTransferBuffer(TPtr8& aPtr)

	{

    GetNextTransferBuffer(KMaxBufSize, aPtr);

	}

#endif

#endif