author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 01:08:46 +0200 | |
changeset 0 | 71ca22bcf22a |
child 48 | a493a607b5bf |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2006 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: Header of TransferBuffer. |
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* |
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*/ |
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#ifndef __MMFFILEPRIV_H_ |
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#define __MMFFILEPRIV_H_ |
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#include <f32file.h> |
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#include <mmf/server/mmfclip.h> |
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#include <mmf/server/mmfdatabuffer.h> |
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/** |
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@publishedAll |
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@released |
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Provides the filename and path of file. |
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Used by CFileSource::ConstructL(). |
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*/ |
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class TMMFFileParams |
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{ |
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public: |
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/** |
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Filename and path of file. |
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*/ |
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TFileName iPath ; // Filename and path of file. |
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private: |
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/** |
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This member is internal and not intended for use. |
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*/ |
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TInt iReserved1; |
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}; |
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/** |
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@internalTechnology |
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*/ |
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const TUid KFileHandleUid = {0x101FFA19}; |
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const TUid KMMFileSourceUid = {0x101F7DA9}; |
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const TUid KMMFileHandleSourceUid = {0x101F7DAA}; |
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const TUid KFileSourceUid = {0x10207B89}; |
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/** |
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@publishedAll |
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@released |
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Provides a pointer to the file handle |
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Used by CFileSource::ConstructL(). |
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*/ |
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class TMMFFileHandleParams |
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{ |
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public: |
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TMMFFileHandleParams(RFile* aFile) : iUid(KFileHandleUid), iFile(aFile) {} |
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TMMFFileHandleParams() : iUid(KFileHandleUid) {} |
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TUid iUid; |
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/** |
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Handle of file |
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*/ |
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RFile* iFile; |
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private: |
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/** |
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This member is internal and not intended for use. |
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*/ |
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TInt iReserved1; |
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}; |
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/** |
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@publishedAll |
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@released |
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*/ |
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typedef TPckgBuf<TMMFFileParams> TMMFFileConfig ; |
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/** |
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@publishedAll |
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@released |
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*/ |
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typedef TPckgBuf<TMMFFileHandleParams> TMMFFileHandleConfig ; |
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/** |
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@publishedAll |
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@released |
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This details how big the iTransferBufferCopies array of CFileSource may |
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become before we start looking to free entries. |
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*/ |
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const TInt KAcceptableTransferBufferCopiesSize = 5; |
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/** |
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@publishedAll |
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@released |
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This details how big the iTransferBufferCopies array of CFileSource may |
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become before we start looking to free entries. |
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*/ |
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const TInt KMaximumTransferBufferCopiesSize = 100; |
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/** |
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* @publishedAll |
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* |
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* Represents a copy of a KUidMmfTransferBuffer used for reading/writting to the file server |
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*/ |
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class CTransferBufferCopy : public CBase |
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{ |
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public: |
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static CTransferBufferCopy* NewL(TInt aMaxLength); |
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virtual ~CTransferBufferCopy() |
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{delete iBuffer;} |
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TDes8& Des() {return iBufferDes;} |
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TInt MaxLength() {return iBufferDes.MaxLength();} |
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void ReUse(TInt aMaxLength) {iBufferDes.Set(iBuffer,0, Min(aMaxLength, iMaxLength));} |
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TBool InUse() {return iInUse;} |
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void SetInUse(TBool aInUse) {iInUse=aInUse;} |
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private: |
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CTransferBufferCopy(TInt aMaxLength) : CBase(), iMaxLength(aMaxLength), iBufferDes(0,0,0), iInUse(EFalse){} |
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void ConstructL(); |
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private: |
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TUint8* iBuffer; |
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//Holds the original MaxLength when class constructed. |
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//May be larger than MaxLength of iBufferDes |
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TInt iMaxLength; |
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TPtr8 iBufferDes; |
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TBool iInUse; |
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}; |
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/** |
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* @internalComponent |
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* |
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* A request is created when an external object requests or supplies data. Calls to the File Server are |
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* made asynchronously and a CReadWriteRequest created to notify the caller on completion. |
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* |
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* CReadWriteRequest is an abstract class. Concrete instances are of CReadRequest & CWriteRequest. |
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* Concrete instances need to know whether to call MDataSink::BufferFilledL() or MDataSource::BufferEmptiedL() |
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*/ |
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class CReadWriteRequest : public CActive |
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{ |
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public: |
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CReadWriteRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer,TBool aSourceType) |
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: CActive(EPriorityStandard), |
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iSinkOrSource(aSinkOrSource), |
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iBuffer(aBuffer), |
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iSourceType(aSourceType) |
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{ |
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CActiveScheduler::Add( this ); |
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} |
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CReadWriteRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer, CTransferBufferCopy* aOptionalDataBuffer,TBool aSourceType) |
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: CActive(EPriorityStandard), |
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iSinkOrSource(aSinkOrSource), |
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iBuffer(aBuffer), |
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iSourceType(aSourceType), |
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iTransferBufferCopy(aOptionalDataBuffer) |
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{ |
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CActiveScheduler::Add( this ); |
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iTransferBufferCopy->SetInUse(ETrue); |
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} |
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|
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CReadWriteRequest(CReadWriteRequest& aRequest) |
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: CActive(EPriorityStandard), |
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iSinkOrSource(aRequest.iSinkOrSource), |
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iBuffer(aRequest.iBuffer), |
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iSourceType(aRequest.iSourceType), |
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iTransferBufferCopy(aRequest.iTransferBufferCopy) |
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{ |
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CActiveScheduler::Add( this ); |
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iTransferBufferCopy->SetInUse(ETrue); |
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} |
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|
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|
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TBool Completed() ; |
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TInt SetStatus(TBool aStatus); |
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TDes8& BufferDes() ; |
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TBool SourceType(); |
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const TDesC8& BufferDesC() ; |
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CMMFBuffer* Buffer(); |
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TAny* GetSinkOrSource(); |
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~CReadWriteRequest() ; |
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// CActive functions. |
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// |
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void SetActive() ; |
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void DoCancel() ; |
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virtual void RunL() = 0 ; |
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virtual TInt RunError( TInt aError ) ; |
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protected : |
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TAny* iSinkOrSource; |
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CMMFBuffer* iBuffer; |
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TBool iSourceType; |
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CTransferBufferCopy* iTransferBufferCopy; |
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TBool iCompleted ; |
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TDes8* iBufferDes ; |
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TInt iError ; |
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TBool iUseTransferBuffer ; |
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void SetTransferBuffer (TBool aTBuffer) ; |
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TBool CanUseTransferBuffer () ; |
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} ; |
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/** |
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* @internalComponent |
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*/ |
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class CReadRequest : public CReadWriteRequest |
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{ |
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public : |
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CReadRequest(TAny* aParent,TAny* aSinkOrSource, CMMFBuffer* aBuffer, TUint aPosition, TUint aFileSize,TBool aSourceType) |
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: CReadWriteRequest(aSinkOrSource, aBuffer,aSourceType), |
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iPosition(aPosition), iFileSize(aFileSize),iParent(aParent) |
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{ } |
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CReadRequest(TAny* aParent,TAny* aSinkOrSource, CMMFBuffer* aBuffer, CTransferBufferCopy* aOptionalDataBuffer, TUint aPosition, TUint aFileSize,TBool aSourceType) |
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: CReadWriteRequest(aSinkOrSource, aBuffer, aOptionalDataBuffer,aSourceType), |
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iPosition(aPosition), iFileSize(aFileSize),iParent(aParent) |
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{ } |
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void RunL(); |
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private: |
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TUint iPosition; |
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TUint iFileSize; |
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TAny* iParent; |
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}; |
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#endif |
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