1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/mm/mmlibs/mmfw/src/Plugin/StdSourceAndSink/MmffilePriv.h Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,186 @@
1.4 +// Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).
1.5 +// All rights reserved.
1.6 +// This component and the accompanying materials are made available
1.7 +// under the terms of "Eclipse Public License v1.0"
1.8 +// which accompanies this distribution, and is available
1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
1.10 +//
1.11 +// Initial Contributors:
1.12 +// Nokia Corporation - initial contribution.
1.13 +//
1.14 +// Contributors:
1.15 +//
1.16 +// Description:
1.17 +//
1.18 +
1.19 +
1.20 +#ifndef __MMFFILEPRIV_H_
1.21 +#define __MMFFILEPRIV_H_
1.22 +
1.23 +#include <f32file.h>
1.24 +
1.25 +#include <mmf/server/mmfclip.h>
1.26 +#include <mmf/server/mmfdatabuffer.h>
1.27 +
1.28 +
1.29 +/**
1.30 + * @publishedAll
1.31 + * @released
1.32 + *
1.33 + * Represents a copy of a KUidMmfTransferBuffer used for reading/writting to the file server
1.34 + */
1.35 +
1.36 +class CTransferBufferCopy : public CBase
1.37 + {
1.38 +public:
1.39 + static CTransferBufferCopy* NewL(TInt aMaxLength);
1.40 +
1.41 + virtual ~CTransferBufferCopy()
1.42 + {delete iBuffer;}
1.43 +
1.44 +
1.45 + TDes8& Des() {return iBufferDes;}
1.46 +
1.47 + TInt MaxLength() {return iBufferDes.MaxLength();}
1.48 +
1.49 + void ReUse(TInt aMaxLength) {iBufferDes.Set(iBuffer,0, Min(aMaxLength, iMaxLength));}
1.50 +
1.51 + TBool InUse() {return iInUse;}
1.52 +
1.53 + void SetInUse(TBool aInUse) {iInUse=aInUse;}
1.54 +
1.55 +private:
1.56 + CTransferBufferCopy(TInt aMaxLength) : CBase(), iMaxLength(aMaxLength), iBufferDes(0,0,0), iInUse(EFalse){}
1.57 +
1.58 + void ConstructL();
1.59 +
1.60 +private:
1.61 + TUint8* iBuffer;
1.62 +
1.63 + //Holds the original MaxLength when class constructed.
1.64 + //May be larger than MaxLength of iBufferDes
1.65 + TInt iMaxLength;
1.66 +
1.67 + TPtr8 iBufferDes;
1.68 +
1.69 + TBool iInUse;
1.70 + };
1.71 +
1.72 +
1.73 +
1.74 +
1.75 +/**
1.76 + * @internalComponent
1.77 + *
1.78 + * A request is created when an external object requests or supplies data. Calls to the File Server are
1.79 + * made asynchronously and a CReadWriteRequest created to notify the caller on completion.
1.80 + *
1.81 + * CReadWriteRequest is an abstract class. Concrete instances are of CReadRequest & CWriteRequest.
1.82 + * Concrete instances need to know whether to call MDataSink::BufferFilledL() or MDataSource::BufferEmptiedL()
1.83 + */
1.84 +class CReadWriteRequest : public CActive
1.85 + {
1.86 +public:
1.87 + CReadWriteRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer, MAsyncEventHandler* aEventHandler)
1.88 + : CActive(EPriorityStandard),
1.89 + iSinkOrSource(aSinkOrSource),
1.90 + iBuffer(aBuffer),
1.91 + iEventHandler(aEventHandler)
1.92 + {
1.93 + CActiveScheduler::Add( this );
1.94 + }
1.95 +
1.96 + CReadWriteRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer, CTransferBufferCopy* aOptionalDataBuffer, MAsyncEventHandler* aEventHandler)
1.97 + : CActive(EPriorityStandard),
1.98 + iSinkOrSource(aSinkOrSource),
1.99 + iBuffer(aBuffer),
1.100 + iTransferBufferCopy(aOptionalDataBuffer),
1.101 + iEventHandler(aEventHandler)
1.102 + {
1.103 + CActiveScheduler::Add( this );
1.104 + iTransferBufferCopy->SetInUse(ETrue);
1.105 + }
1.106 +
1.107 + CReadWriteRequest(CReadWriteRequest& aRequest)
1.108 + : CActive(EPriorityStandard),
1.109 + iSinkOrSource(aRequest.iSinkOrSource),
1.110 + iBuffer(aRequest.iBuffer),
1.111 + iTransferBufferCopy(aRequest.iTransferBufferCopy),
1.112 + iEventHandler(aRequest.iEventHandler)
1.113 + {
1.114 + CActiveScheduler::Add( this );
1.115 + iTransferBufferCopy->SetInUse(ETrue);
1.116 + }
1.117 +
1.118 +
1.119 + TBool Completed() ;
1.120 + TDes8& BufferDes() ;
1.121 + const TDesC8& BufferDesC() ;
1.122 +
1.123 + ~CReadWriteRequest() ;
1.124 +
1.125 +
1.126 + // CActive functions.
1.127 + //
1.128 + void SetActive() ;
1.129 + void DoCancel() ;
1.130 + virtual void RunL() = 0 ;
1.131 + virtual TInt RunError( TInt aError ) ;
1.132 +
1.133 +
1.134 +protected :
1.135 + TAny* iSinkOrSource;
1.136 + CMMFBuffer* iBuffer;
1.137 + CTransferBufferCopy* iTransferBufferCopy;
1.138 +
1.139 + MAsyncEventHandler* iEventHandler;
1.140 + TBool iCompleted ;
1.141 + TDes8* iBufferDes ;
1.142 + TInt iError ;
1.143 + TBool iUseTransferBuffer ;
1.144 + void SetTransferBuffer (TBool aTBuffer) ;
1.145 + TBool CanUseTransferBuffer () ;
1.146 + } ;
1.147 +
1.148 +/**
1.149 + * @internalComponent
1.150 + */
1.151 +class CReadRequest : public CReadWriteRequest
1.152 + {
1.153 +public :
1.154 + CReadRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer, TUint aPosition, TUint aFileSize, MAsyncEventHandler* aEventHandler)
1.155 + : CReadWriteRequest(aSinkOrSource, aBuffer, aEventHandler),
1.156 + iPosition(aPosition), iFileSize(aFileSize)
1.157 + { }
1.158 +
1.159 + CReadRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer, CTransferBufferCopy* aOptionalDataBuffer, TUint aPosition, TUint aFileSize, MAsyncEventHandler* aEventHandler)
1.160 + : CReadWriteRequest(aSinkOrSource, aBuffer, aOptionalDataBuffer, aEventHandler),
1.161 + iPosition(aPosition), iFileSize(aFileSize)
1.162 + { }
1.163 +
1.164 + void RunL();
1.165 +private:
1.166 + TUint iPosition;
1.167 + TUint iFileSize;
1.168 + };
1.169 +
1.170 +/**
1.171 + * @internalComponent
1.172 + */
1.173 +class CWriteRequest : public CReadWriteRequest
1.174 + {
1.175 +public :
1.176 + CWriteRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer, MAsyncEventHandler* aEventHandler)
1.177 + : CReadWriteRequest(aSinkOrSource, aBuffer, aEventHandler)
1.178 + { }
1.179 +
1.180 + CWriteRequest(TAny* aSinkOrSource, CMMFBuffer* aBuffer, CTransferBufferCopy* aOptionalDataBuffer, MAsyncEventHandler* aEventHandler)
1.181 + : CReadWriteRequest(aSinkOrSource, aBuffer, aOptionalDataBuffer, aEventHandler)
1.182 + { }
1.183 +
1.184 + void RunL();
1.185 + };
1.186 +
1.187 +
1.188 +#endif
1.189 +