| author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
| Thu, 07 Jan 2010 13:31:38 +0200 | |
| changeset 26 | cb62a4f66ebe |
| parent 0 | dd21522fd290 |
| permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2004 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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* Contributors: |
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* |
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* Description: |
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* Implementation of class RFavouritesBuf |
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* |
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* |
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*/ |
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// INCLUDE FILES |
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#include "FavouritesBuf.h" |
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#include "FavouritesMsg.h" |
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#include "FavouritesPanic.h" |
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// ================= MEMBER FUNCTIONS ======================= |
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// --------------------------------------------------------- |
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// RFavouritesBuf::Open |
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// --------------------------------------------------------- |
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// |
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TInt RFavouritesBuf::Open( RFavouritesSession& aSess ) |
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{
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SetBuf( ERead | EWrite, iBuf.iData, iBuf.iData ); // Empty. |
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return RFavouritesHandle::Open( aSess, EFavengOpenStream, TIpcArgs() ); |
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} |
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// --------------------------------------------------------- |
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// RFavouritesBuf::Open |
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// --------------------------------------------------------- |
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// |
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TInt RFavouritesBuf::Open |
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( RFavouritesHandle& aHandle, TInt aFunction, TIpcArgs& aArgs ) |
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{
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iBuf.iLen = 0; |
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SetBuf( ERead | EWrite, iBuf.iData, iBuf.iData ); // Initially empty. |
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TPckg<TFavouritesBuf> buf( iBuf ); |
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aArgs.Set( 3, &buf ); |
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TInt err = RFavouritesHandle::Open( aHandle, aFunction, aArgs ); |
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if ( !err && iBuf.iLen > 0 ) |
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{
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// If aFunction provided data, it is already here. |
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SetEnd( ERead, iBuf.iData + iBuf.iLen ); |
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} |
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return err; |
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} |
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// --------------------------------------------------------- |
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// RFavouritesBuf::Close() |
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// --------------------------------------------------------- |
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// |
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void RFavouritesBuf::Close() |
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{
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// Resolve RFavouritesHandle::Close() vs. TStreamBuf::Close() ambiguity. |
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// Mind the order: TStreamBuf::Close calls SynchL -> needs an open buf. |
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TStreamBuf::Close(); |
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RFavouritesHandle::Close(); |
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} |
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// --------------------------------------------------------- |
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// RFavouritesBuf::UnderflowL() |
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// --------------------------------------------------------- |
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// |
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TInt RFavouritesBuf::UnderflowL( TInt /*aMaxLength*/ ) |
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{
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__ASSERT_DEBUG( Avail( ERead ) == 0, \ |
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FavouritesPanic( EFavouritesInternal ) ); |
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return IpcReadL(); |
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} |
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// --------------------------------------------------------- |
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// RFavouritesBuf::OverflowL() |
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// --------------------------------------------------------- |
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// |
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void RFavouritesBuf::OverflowL() |
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{
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__ASSERT_DEBUG( Avail( EWrite ) == 0, \ |
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FavouritesPanic( EFavouritesInternal ) ); |
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IpcWriteL(); |
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} |
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// --------------------------------------------------------- |
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// RFavouritesBuf::DoSynchL() |
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// --------------------------------------------------------- |
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// |
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void RFavouritesBuf::DoSynchL() |
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{
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if ( Lag( ERead ) ) |
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{
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// Read lag unexpected, we do not support seeking. |
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User::Leave( KErrNotSupported ); |
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} |
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IpcWriteL(); // Flush write lag. |
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SetBuf( ERead | EWrite, iBuf.iData, iBuf.iData ); |
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} |
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// --------------------------------------------------------- |
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// RFavouritesBuf::IpcReadL() |
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// --------------------------------------------------------- |
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// |
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TInt RFavouritesBuf::IpcReadL() |
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{
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TPtr8 des( iBuf.iData, KFavouritesStreamBufSize ); |
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TInt len = User::LeaveIfError |
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( SendReceive( EFavengStreamRead, TIpcArgs( &des ) ) ); |
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SetBuf( EWrite, iBuf.iData, iBuf.iData ); |
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SetBuf( ERead, iBuf.iData, iBuf.iData + len ); |
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return len; |
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} |
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// --------------------------------------------------------- |
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// RFavouritesBuf::IpcWriteL() |
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// --------------------------------------------------------- |
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// |
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void RFavouritesBuf::IpcWriteL() |
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{
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if ( Lag( EWrite ) ) |
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{
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TPtrC8 ptr( iBuf.iData, Lag( EWrite ) ); |
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User::LeaveIfError |
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( SendReceive( EFavengStreamWrite, TIpcArgs( &ptr ) ) ); |
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} |
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SetBuf( ERead, iBuf.iData, iBuf.iData ); |
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SetBuf( EWrite, iBuf.iData, iBuf.iData + KFavouritesStreamBufSize ); |
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} |
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// End of File |