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// Copyright (c) 2007-2009 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 the License "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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// Description:
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//
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/**
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@file
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@internalComponent
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*/
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#ifndef ZEROCOPYMETADATA_H
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#define ZEROCOPYMETADATA_H
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#include <e32def.h>
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// The type used to represent an address various betwen user and kernel
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// mode. To aid us we use a macro to produce only one definition.
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#ifndef __KERNEL_MODE__
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#define TAddrType TUint8*
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#else // __KERNEL_MODE__
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#define TAddrType TLinAddr
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#endif // __KERNEL_MODE__
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NONSHARABLE_CLASS(UsbZeroCopyChunkHeaderBase)
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{
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public:
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static inline RUsbTransferDescriptor::TTransferType& TransferType(TAddrType aBase, TInt aHeaderOffset);
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protected:
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enum THeaderBaseSizes
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{
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ETransferTypeSize = sizeof(RUsbTransferDescriptor::TTransferType)
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};
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enum THeaderBaseLayout
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{
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ETransferType = 0,
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// End of fields
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EHeaderBaseSize = ETransferType + ETransferTypeSize
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};
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};
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NONSHARABLE_CLASS(UsbZeroCopyBulkIntrChunkHeader) : public UsbZeroCopyChunkHeaderBase
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{
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public:
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static inline TInt HeaderSize();
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static inline TInt& DataOffset(TAddrType aBase, TInt aHeaderOffset);
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static inline TInt& DataLength(TAddrType aBase, TInt aHeaderOffset);
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static inline TInt& DataMaxLength(TAddrType aBase, TInt aHeaderOffset);
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static inline RUsbTransferDescriptor::TZlpStatus& ZlpStatus(TAddrType aBase, TInt aHeaderOffset);
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private:
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enum THeaderSizes
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{
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EDataOffsetSize = sizeof(TInt),
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EDataLengthSize = sizeof(TInt),
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EDataMaxLengthSize = sizeof(TInt),
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EZlpStatusSize = sizeof(RUsbTransferDescriptor::TZlpStatus)
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};
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enum THeaderLayout
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{
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EDataOffset = EHeaderBaseSize,
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EDataLength = EDataOffset + EDataOffsetSize,
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EDataMaxLength = EDataLength + EDataLengthSize,
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EZlpStatus = EDataMaxLength + EDataMaxLengthSize,
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// End of fields
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EHeaderSize = EZlpStatus + EZlpStatusSize
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};
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};
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NONSHARABLE_CLASS(UsbZeroCopyIsocChunkHeader) : public UsbZeroCopyChunkHeaderBase
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{
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public: // Lengths Array constants
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static const TInt KLengthsElementSize = sizeof(TUint16);
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static const TInt KResultsElementSize = sizeof(TInt);
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public:
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static inline TInt HeaderSize();
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static inline TInt& FirstElementOffset(TAddrType aBase, TInt aHeaderOffset);
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static inline TInt& MaxNumPackets(TAddrType aBase, TInt aHeaderOffset);
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static inline TInt& MaxPacketSize(TAddrType aBase, TInt aHeaderOffset);
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static inline TInt& LengthsOffset(TAddrType aBase, TInt aHeaderOffset);
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static inline TInt& ReqLenOffset(TAddrType aBase, TInt aHeaderOffset);
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static inline TInt& ResultsOffset(TAddrType aBase, TInt aHeaderOffset);
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private:
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enum THeaderSizes
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{
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EFirstElementOffsetSize = sizeof(TInt),
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EMaxNumPacketsSize = sizeof(TInt),
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EMaxPacketSizeSize = sizeof(TInt),
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ELengthsOffsetSize = sizeof(TInt),
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EReqLenOffsetSize = sizeof(TInt),
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EResultsOffsetSize = sizeof(TInt)
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};
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enum THeaderLayout
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{
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EFirstElementOffset = EHeaderBaseSize,
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EMaxNumPackets = EFirstElementOffset + EFirstElementOffsetSize,
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EMaxPacketSize = EMaxNumPackets + EMaxNumPacketsSize,
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ELengthsOffset = EMaxPacketSize + EMaxPacketSizeSize,
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EReqLenOffset = ELengthsOffset + ELengthsOffsetSize,
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EResultsOffset = EReqLenOffset + EReqLenOffsetSize,
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// End of fields
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EHeaderSize = EResultsOffset + EResultsOffsetSize
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};
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};
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NONSHARABLE_CLASS(UsbZeroCopyIsocChunkElement)
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{
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public:
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// NumOfPackets constants
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static const TInt KInvalidElement = -1;
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// NextElementOffset constants
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static const TInt KEndOfList = -1;
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public:
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static inline TInt ElementSize();
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static inline TInt& DataOffset(TAddrType aBase, TInt aHeaderOffset);
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static inline TInt& NumPackets(TAddrType aBase, TInt aHeaderOffset);
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static inline TInt& NextElementOffset(TAddrType aBase, TInt aHeaderOffset);
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private:
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enum THeaderSizes
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{
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EDataOffsetSize = sizeof(TInt),
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ENumPacketsSize = sizeof(TInt),
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ENextElementOffsetSize = sizeof(TInt),
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};
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enum THeaderLayout
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{
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EDataOffset = 0,
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ENumPackets = EDataOffset + EDataOffsetSize,
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ENextElementOffset = ENumPackets + ENumPacketsSize,
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// End of fields
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EElementSize = ENextElementOffset + ENextElementOffsetSize
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};
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};
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#include "zerocopymetadata.inl"
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#undef TAddrType // Prevent the macro from leaking outside this header
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#endif // ZEROCOPYMETADATA_H
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