guestrendering/guestvideodriver/ldd/src/devicereqhandler.cpp
branchbug235_bringup_0
changeset 51 4f400a6ea71f
parent 49 3b4f7e9d873f
child 52 39e5f73667ba
--- a/guestrendering/guestvideodriver/ldd/src/devicereqhandler.cpp	Wed Sep 29 09:49:13 2010 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1453 +0,0 @@
-// Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
-// All rights reserved.
-// This component and the accompanying materials are made available
-// under the terms of "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:
-// Device Request Handler Implementation
-
-
-#include <platform.h>
-#include <assp.h>
-#include <kernel/kernel.h>
-#include <e32cmn.h>
-
-#include <graphics/devicereqhandler.h>
-#include <graphics/virtualvideohwinterface.h>
-#include <graphics/virtualvideotracing.h>
-
-#include "remotefunctioncall.h"
-#include "serializedfunctioncall.h"
-#include "driverrfc.h"
-#include "openvgrfc.h" //For the opcodes
-#include "eglrfc.h" //For the opcodes
-#include "opengles11rfc.h" //For the opcodes
-
-
-using namespace GuestVideoDriver;
-
-// LOCAL DATA TYPES
-TInt CmpTPbsIds(const TPbSId& a, const TPbSId& b)
-    {
-    if( a.iPbuffer == b.iPbuffer )
-        return 0;
-    else
-        return b.iPbuffer - a.iPbuffer;
-    }
-
-TInt CmpTVGIsIds(const TVGISId& a, const TVGISId& b)
-    {
-    if( a.iVGImage == b.iVGImage )
-        return 0;
-    else
-        return b.iVGImage - a.iVGImage;
-    }
-/*
- * Copies data from client space to the request buffer during serialisation
- */
-class TDataFromClientSpaceCopier: public MDataCopier
-    {
-public:
-    TDataFromClientSpaceCopier( DThread* aUserThread ):
-        iUserThread(aUserThread)
-        {
-        }
-    
-    TInt CopyData( TUint8* aDest, const TUint8* aSource, TUint32 aSize )
-        {
-        memcpy( aDest, aSource, aSize );
-        return KErrNone;
-        }
-    
-    TInt CopyVector( TUint8* aDest, const TUint8* aSource, TUint32 aSize )
-        {
-        return Kern::ThreadRawRead( iUserThread, aSource, aDest, aSize );
-        }
-
-    DThread* iUserThread;
-    };
-
-/*
- * Copies data to client space from the request buffer during deserialisation
- */
-class TDataToClientSpaceCopier: public MDataCopier
-    {
-public:
-    TDataToClientSpaceCopier( DThread* aUserThread ):
-        iUserThread(aUserThread)
-        {
-        }
-    
-    TInt CopyData( TUint8* aDest, const TUint8* aSource, TUint32 aSize )
-        {
-        memcpy( aDest, aSource, aSize );
-        return KErrNone;
-        }
-    
-    TInt CopyVector( TUint8* aDest, const TUint8* aSource, TUint32 aSize )
-        {
-        return Kern::ThreadRawWrite(iUserThread, aDest, aSource, aSize );
-        }
-
-    DThread* iUserThread;
-    };
-
-// LOCAL FUNCTION DEFINITIONS
-
-// -----------------------------------------------------------------------------
-// ListRemoteFunctionCall
-// -----------------------------------------------------------------------------
-//
-inline void ListRemoteFunctionCall(RemoteFunctionCallData& call)
-    {
-#if _DEBUG
-    VVHW_TRACE("RFC: %u %u %u %u %u %u %u",
-    call.Header().iOpCode,
-    call.Header().iTransactionId,
-    call.Header().iProcessId,
-    call.Header().iThreadId,
-    call.Header().iParameterCount,
-    call.Header().iOpType,
-    call.Header().iReturnValue);
-    
-    for ( TInt i = 0; i < call.Header().iParameterCount; i++)
-        {
-        RemoteFunctionCallData::TParam param = call.Parameters()[i];
-
-        TUint32 dir = param.iDir;
-        TUint32 type = param.iType;
-
-        
-        if ( RemoteFunctionCallData::TParam::ESimple == param.iType )
-            {
-            TUint32 datatype = param.iSimpleParam.iDataType; 
-            VVHW_TRACE("RFC Simple Param %d: %u %u %u",i, dir, type, datatype );
-            }
-        else if ( RemoteFunctionCallData::TParam::EVector == param.iType )
-            {
-            TUint32 datatype = param.iVectorParam.iDataType; 
-            TUint32 size = param.iVectorParam.iVectorLength;
-            VVHW_TRACE("RFC Vec Param %d: %u %u %u %u",i, dir, type, datatype, size );
-            }
-        }
-#endif // _DEBUG
-    }
-
-
-// CONSTANTS
-const TInt KDfcPriority = 1;
-
-// ============================= LOCAL FUNCTIONS ===============================
-
-// -----------------------------------------------------------------------------
-// Isr
-// Interrupt service routine
-// -----------------------------------------------------------------------------
-//
-void Isr( TAny* aParam )
-    {
-    DDeviceReqHandler* handler = ( DDeviceReqHandler* )aParam;
-    Interrupt::Disable( handler->InterruptId() );
-    handler->Dfc().Add();
-    }
-
-// -----------------------------------------------------------------------------
-// DfcFunc
-// Function to call when HW has an interrupt
-// -----------------------------------------------------------------------------
-//
-void DfcFunc( TAny* aParam )
-    {
-    DDeviceReqHandler* handler = ( DDeviceReqHandler* )aParam;
-    handler->ProcessDfc();
-    }
-
-// ============================ MEMBER FUNCTIONS ===============================
-
-
-// -----------------------------------------------------------------------------
-// DDeviceReqHandler::DDeviceReqHandler
-// -----------------------------------------------------------------------------
-//
-DDeviceReqHandler::DDeviceReqHandler(
-    DVirtualVideoHwInterface& aHwInterface,
-    TDfcQue* aQueue) :
-    iPbufferSgMapOrder ( &CmpTPbsIds ),
-    iVGImageSgMapOrder ( &CmpTVGIsIds ),
-    iCurrClientData(NULL),
-    iInitialized(EFalse),
-    iHwInterface( aHwInterface ),
-    iDfc( DfcFunc, (TAny*)this, aQueue, KDfcPriority ),
-    iInterruptId( 0 ),
-    iTransactionId( 1 ),
-    iRequestBuffer( *this, VVI_PARAMETERS_INPUT_MEMORY_SIZE )
-    {
-    iDriverRfcProcessId = 0;
-    iDriverRfcThreadId  = 0;
-    iOpType       = 0; 
-    iOpChainPhase = 0;
-    iInterruptId  = VVI_IRQ;
-    VVHW_TRACE( "DDeviceReqHandler constructor" );
-    VVHW_TRACE( "Called in process/thread %0x / %0x", Kern::CurrentProcess().iId, Kern::CurrentThread().iId );
-    TInt err = Interrupt::Bind( iInterruptId, Isr, ( TAny* )this );
-    if ( err != KErrNone )
-        {
-        VVHW_TRACE( "Interrupt::Bind Error: %d", err );
-        }
-    err = Interrupt::Enable( iInterruptId );
-    if ( err != KErrNone )
-        {
-        Interrupt::Unbind( iInterruptId );
-        iInterruptId = 0;
-        VVHW_TRACE( "Interrupt::Enable Error: %d", err );
-        }
-    iRequestBuffer.InitBuffer();
-    //Register this object with the extension
-    VVHW_TRACE( "DDeviceReqHandler calling ReqHandlerExtension" );
-#ifdef FAISALMEMON_S4_SGIMAGE
-    ReqHandlerExtension::SetReqHandler( this );
-#endif
-    }
-
-// -----------------------------------------------------------------------------
-// DDeviceReqHandler::~DDeviceReqHandler
-// -----------------------------------------------------------------------------
-//
-DDeviceReqHandler::~DDeviceReqHandler()
-    {
-    for( TInt i=0; i < iClientData.Count(); ++i )
-        {
-        delete iClientData[i];
-        }
-    iClientData.Close();
-    Interrupt::Disable( iInterruptId );
-    Interrupt::Unbind( iInterruptId );
-    iInterruptId = 0;
-    }
-
-// -----------------------------------------------------------------------------
-// DDeviceReqHandler::HandleClientShutdown
-// -----------------------------------------------------------------------------
-//
-TInt DDeviceReqHandler::HandleClientShutdown( TUint aProcessId, TUint aThreadId )
-    {
-    VVHW_TRACE("DDeviceReqHandler::HandleClientShutdown");
-    TInt err( KErrNone );
-    TAsyncRequest* req = AllocRequest( NULL, NULL, NULL, NULL, TAsyncRequest::ERTDriver );
-    
-    if ( req )
-        {
-        DriverRFC drfc( req->iRemoteFunctionCall );
-        drfc.Init( DriverRFC::EDrvClientShutdown, RemoteFunctionCallData::EOpRequest );        
-        req->iRemoteFunctionCall.SetTransactionId( ++iTransactionId );
-        req->iRemoteFunctionCall.SetThreadInformation( aProcessId, aThreadId );        
-        iPendingRequestRoot.AppendToLast( req );
-        TInt ret = ProcessNextPendingRequest();
-        while ( KErrNone == ret )
-            {
-            ret = ProcessNextPendingRequest();
-            }
-        }
-    else
-        {
-        err = KErrNoMemory;
-        }
-    return err;
-    }
-
-// -----------------------------------------------------------------------------
-// DDeviceReqHandler::ProcessNextPendingRequest
-// -----------------------------------------------------------------------------
-//
-TInt DDeviceReqHandler::ProcessNextPendingRequest()
-    {
-    VVHW_TRACE("DDeviceReqHandler::ProcessNextPendingRequest");
-    TInt err( KErrNone );
-    TAsyncRequest* req = iPendingRequestRoot.iNext;
-    if ( !req )
-        {
-        VVHW_TRACE("DDeviceReqHandler::ProcessNextPendingRequest !req");
-        return KErrUnderflow;
-        }
-    //Try to serve the client from here, or do some sgImage specific stuff
-    TInt mode = InterpretRequest( req );
-    switch( mode )
-        {
-        case ENormal:
-            {
-            //Nothing, process as normal
-            break;
-            }
-        case EHandled:
-            {
-            //Already handled, remove and signal complete
-            req->RemoveFromList( &iPendingRequestRoot );
-            Kern::RequestComplete( req->iAsyncClient, req->iStatus, KErrNone );
-            ReleaseRequest( req );
-            return KErrNone;//Change to "err" if you add lines above this that may set it to something else
-            }
-        case EQueued:
-            {
-            //To be removed from the usual queues, but not deleted (released) or completed
-            req->RemoveFromList( &iPendingRequestRoot );
-            return KErrNone;
-            }
-        default:
-            {
-            break;
-            }
-        }
-    
-    if ( TAsyncRequest::ERTCommandLoad == req->iCommandLoadRequest )
-        {
-        VVHW_TRACE("DDeviceReqHandler::HandleLoadCommands");
-        TInt loaderr( KErrNone );
-        TInt len = Kern::ThreadGetDesLength( req->iAsyncClient, req->iA1 );
-
-        if ( len < 0 )
-            {
-            VVHW_TRACE("DDeviceReqHandler::HandleLoadCommands len < 0");
-            return KErrUnderflow;;
-            }
-
-        if ( !iRequestBuffer.CheckForSpace( len ) )
-           {
-           //Not enough space
-           VVHW_TRACE("DDeviceReqHandler::HandleLoadCommands No space");
-           return KErrNoMemory;
-           }
-
-        req->RemoveFromList( &iPendingRequestRoot );
-
-        const TUint32 base( iRequestBuffer.AllocateBytes( len ) );
-
-        //Next, serialize the call to the HW memory
-        const TLinAddr paramAddr( iHwInterface.InputParametersAddress() + base );
-
-        TPtr8 ptr(reinterpret_cast<TUint8*>(paramAddr), 0, len );
-        
-        //Read the RemoveFunctionCall
-        loaderr = Kern::ThreadDesRead( req->iAsyncClient, req->iA1, ptr, 0, 0 );
-        VVHW_TRACE("DDeviceReqHandler::HandleLoadCommands ThreadDesRead %d", loaderr);
-
-        if ( KErrNone == loaderr )
-            {
-            VVHW_TRACE("DDeviceReqHandler::HandleLoadCommands CommitBytes");
-            iRequestBuffer.CommitBytes( base, len );
-            iHwInterface.IssueCommand( VVI_EXECUTE );
-            }
-        Kern::RequestComplete( req->iAsyncClient, req->iStatus, loaderr );
-        ReleaseRequest( req );
-        }
-    else //ERTRequest or ERTDriver
-        {
-#if _DEBUG
-        ListRemoteFunctionCall( req->iRemoteFunctionCall );
-#endif
-       VVHW_TRACE("DDeviceReqHandler::ProcessNextPendingRequest req %u tid %u opcode %u", 
-            req, req->iRemoteFunctionCall.Header().iTransactionId,
-            req->iRemoteFunctionCall.Header().iOpCode );
-        const TUint32 serializedLength( req->iRemoteFunctionCall.SerialisedLength() );
-        if ( !iRequestBuffer.CheckForSpace( serializedLength ) )
-           {
-           //Not enough space
-           VVHW_TRACE("DDeviceReqHandler::ProcessNextPendingRequest No space");
-           return KErrOverflow;
-           }
-    
-        req->RemoveFromList( &iPendingRequestRoot );
-    
-        if ( RemoteFunctionCallData::EOpRequestWithReply == req->iRemoteFunctionCall.Header().iOpType )
-            {
-            VVHW_TRACE("DDeviceReqHandler::ProcessNextPendingRequest 3");
-            iSerializedRequestRoot.AppendToLast( req );
-            }
-        TDataFromClientSpaceCopier datacopier( req->iAsyncClient );
-        SerializedFunctionCall sfc( req->iRemoteFunctionCall );
-        
-        if ( TAsyncRequest::ERTRequest == req->iCommandLoadRequest )
-            {
-            sfc.SetDataCopier( &datacopier );            
-            }
-        
-        const TUint32 base( iRequestBuffer.AllocateBytes( serializedLength ) );
-    
-        //Next, serialize the call to the HW memory
-        const TLinAddr paramAddr( iHwInterface.InputParametersAddress() + base );
-    
-        TInt len = sfc.WriteToBuffer( reinterpret_cast<TUint8*>(paramAddr),
-                VVI_PARAMETERS_INPUT_MEMORY_SIZE - 1 - base );
-        
-        sfc.SetDataCopier( NULL );
-        VVHW_TRACE("DDeviceReqHandler::ProcessNextPendingRequest Write at index %u with length %u", base, len );
-        iRequestBuffer.CommitBytes( base, serializedLength );
-    
-        iHwInterface.IssueCommand( VVI_EXECUTE );
-        
-        if ( RemoteFunctionCallData::EOpRequest == req->iRemoteFunctionCall.Header().iOpType )
-            {
-            if ( TAsyncRequest::ERTRequest == req->iCommandLoadRequest )
-                {
-                VVHW_TRACE("DDeviceReqHandler::ProcessNextPendingRequest RequestComplete");
-                Kern::RequestComplete( req->iAsyncClient, req->iStatus, KErrNone );
-                }
-            ReleaseRequest( req );
-            }
-        }
-    VVHW_TRACE("DDeviceReqHandler::ProcessNextPendingRequest DONE");
-    return err;
-    }
-
-// -----------------------------------------------------------------------------
-// DDeviceReqHandler::HandleLoadCommands
-// -----------------------------------------------------------------------------
-//
-TInt DDeviceReqHandler::HandleLoadCommands(
-        DThread*& aUserThread,
-        TRequestStatus* aStatus,
-        TAny* aA1 )
-    {
-    VVHW_TRACE("DDeviceReqHandler::HandleLoadCommands");
-    TInt err( KErrNone );
-    TAsyncRequest* req = AllocRequest( aStatus, aUserThread, aA1, NULL, TAsyncRequest::ERTCommandLoad );
-    
-    if ( req )
-        {
-        TInt len = Kern::ThreadGetDesLength( req->iAsyncClient, req->iA1 );
-    
-        if ( len < 0 )
-            {
-            err = len;//TODO: this sucks
-            ReleaseRequest( req );
-            return err;
-            }
-            
-        iPendingRequestRoot.AppendToLast( req );
-        TInt ret = ProcessNextPendingRequest();
-        while ( KErrNone == ret )
-            {
-            ret = ProcessNextPendingRequest();
-            }
-        }
-    else
-        {
-        err = KErrNoMemory;
-        }
-
-    return err;
-    }
-
-// -----------------------------------------------------------------------------
-// DDeviceReqHandler::HandleExecuteAsync
-// -----------------------------------------------------------------------------
-//
-TInt DDeviceReqHandler::HandleExecuteAsync(
-        DThread*& aUserThread,
-        TRequestStatus* aStatus,
-        TAny* a1 )
-    {
-    VVHW_TRACE("DDeviceReqHandler::HandleExecuteAsync");
-    TInt err( KErrNone );
-    TAsyncRequest* req = AllocRequest( aStatus, aUserThread, a1, NULL );
-    
-    if ( req )
-        {
-        TInt len = Kern::ThreadGetDesLength( req->iAsyncClient, req->iA1 );
-    
-        if ( len < 0 )
-            {
-            err = len;
-            ReleaseRequest( req );
-            return err;
-            }
-    
-        TPckg<RemoteFunctionCallData> rcallbuf( req->iRemoteFunctionCall );
-        
-        //Read the RemoteFunctionCall
-        err = Kern::ThreadDesRead( req->iAsyncClient, req->iA1, rcallbuf, 0, 0 );
-
-        if ( KErrNone != err )
-            {
-            ReleaseRequest( req );
-            return err;
-            }
-        
-        req->iRemoteFunctionCall.SetTransactionId( ++iTransactionId );
-
-        iPendingRequestRoot.AppendToLast( req );
-        TInt ret = ProcessNextPendingRequest();
-        while ( KErrNone == ret )
-            {
-            ret = ProcessNextPendingRequest();
-            }
-        }
-    else
-        {
-        err = KErrNoMemory;
-        }
-    VVHW_TRACE("DDeviceReqHandler::HandleExecuteAsync <-");
-    return err;
-    }
-
-// -----------------------------------------------------------------------------
-// DDeviceReqHandler::ProcessDfc
-// -----------------------------------------------------------------------------
-//
-void DDeviceReqHandler::ProcessDfc()
-    {
-    VVHW_TRACE("DDeviceReqHandler::ProcessDfc");
-    TUint32 error( 0 );
-    iHwInterface.GetRegisterValue( DVirtualVideoHwInterface::ERegError, error );
-
-    TUint32 transactionId;
-    iHwInterface.GetRegisterValue( DVirtualVideoHwInterface::ERegRequestId, transactionId );
-
-    TAsyncRequest* req = iSerializedRequestRoot.iNext;
-    VVHW_TRACE( "DDeviceReqHandler::ProcessDfc req %u transactionid %u", req, transactionId );
-    
-
-    if ( req && transactionId == req->iRemoteFunctionCall.Header().iTransactionId )
-        {
-        req->RemoveFromList( &iSerializedRequestRoot );
-        
-        //Check if the request was scheduler-initiated
-        TBool driverInitiated(EFalse);
-        if( iSchedulerInitiatedTransactionIds.Count() > 0 )
-            {
-            for( int i=0;i<iSchedulerInitiatedTransactionIds.Count();++i )
-                {
-                if( iSchedulerInitiatedTransactionIds[i].iTransactionId == req->iRemoteFunctionCall.Header().iTransactionId )
-                    {
-                driverInitiated = ETrue;
-                    //This will be used in the "consume" function later on in many cases
-                    iSchedulerInitiatedTransactionData = iSchedulerInitiatedTransactionIds[i].iTransactionData; 
-                    iSchedulerInitiatedTransactionIds.Remove( i );
-                    break;
-                    }
-                }
-            }
-        
-        if( driverInitiated )
-            {
-            //This branch is for the purpose of handling commands that have been initiated from (this) 
-            //Command Scheduler, and not a client thread. So far no cases exists, where this would
-            //imply notifying a (client) DLL, so RequestComplete does not have to be called here (this could change later).
-            //Parse result and write vectors back to client space
-            if ( 0 == error )
-                {
-                //Parse result and write vectors back to client space        
-                TDataToClientSpaceCopier datacopier2( req->iAsyncClient );
-                RemoteFunctionCallData rfc;
-                SerializedFunctionCall sfc( rfc );
-                sfc.SetDataCopier( &datacopier2 );
-                const TLinAddr paramAddr( iHwInterface.OutputParametersAddress() );
-                VVHW_TRACE("DDeviceReqHandler::ProcessDfc parse");
-                sfc.ParseBuffer( reinterpret_cast<TUint8*>( paramAddr ), VVI_PARAMETERS_OUTPUT_MEMORY_SIZE );
-                TPckg<RemoteFunctionCallData> resultbuf( rfc );
-                req->iRemoteFunctionCall = resultbuf();//Get the object; its in the same address space 
-                VVHW_TRACE("DDeviceReqHandler::ProcessDfc ThreadDesWrite err=%d (data len=%d)", error, resultbuf.Length());
-                sfc.SetDataCopier( NULL );
-                }
-
-            error = ResetAndEnableInterrupt( DVirtualVideoHwInterface::EInterruptNewDataAvailable );
-            ConsumeSchedulerInitiatedRequestResult( req );
-            }
-        else
-            {
-			TInt desWriteError = KErrNone;
-            if ( 0 == error )
-                {
-                //Parse result and write vectors back to client space
-				// TODO for performance only write back result & output vectors, not whole request buffer
-                TDataToClientSpaceCopier datacopier2( req->iAsyncClient );
-                RemoteFunctionCallData rfc;
-                SerializedFunctionCall sfc( rfc );
-                sfc.SetDataCopier( &datacopier2 );
-                const TLinAddr paramAddr( iHwInterface.OutputParametersAddress() );
-                VVHW_TRACE("DDeviceReqHandler::ProcessDfc parse");
-                sfc.ParseBuffer( reinterpret_cast<TUint8*>( paramAddr ), VVI_PARAMETERS_OUTPUT_MEMORY_SIZE );
-                TPckg<RemoteFunctionCallData> resultbuf( rfc );
-                desWriteError = Kern::ThreadDesWrite( req->iAsyncClient, req->iA1, resultbuf, 0, 0 );
-                VVHW_TRACE("DDeviceReqHandler::ProcessDfc ThreadDesWrite err=%d (data len=%d)",desWriteError, resultbuf.Length());
-                sfc.SetDataCopier( NULL );
-                }
-
-            Kern::RequestComplete( req->iAsyncClient, req->iStatus, desWriteError );
-            ResetAndEnableInterrupt( DVirtualVideoHwInterface::EInterruptNewDataAvailable );
-            ReleaseRequest( req );
-            }
-        }
-    else
-        {
-        ResetAndEnableInterrupt( DVirtualVideoHwInterface::EInterruptNewDataAvailable );
-        }
-    VVHW_TRACE("DDeviceReqHandler::ProcessDfc ProcessNextPendingRequest");
-    
-    TInt ret = ProcessNextPendingRequest();
-    while ( KErrNone == ret )
-        {
-        ret = ProcessNextPendingRequest();
-        }
-    }
-
-// -----------------------------------------------------------------------------
-// DDeviceReqHandler::AllocRequest
-// -----------------------------------------------------------------------------
-//
-DDeviceReqHandler::TAsyncRequest* DDeviceReqHandler::AllocRequest( TRequestStatus* aStatus,
-        DThread* aAsyncClient,
-        TAny* aA1,
-        TAny* aA2,
-        DDeviceReqHandler::TAsyncRequest::TRequestType aRequestType )
-    {
-    TAsyncRequest* req( NULL );
-    if ( iFreeCount )
-        {
-        req = iFreeListRoot.iNext;
-        req->RemoveFromList( &iFreeListRoot );
-        req->Init( aStatus, aAsyncClient, aA1, aA2, aRequestType );
-        iFreeCount--;
-        }
-    else
-        {
-        VVHW_TRACE("DDeviceReqHandler::AllocRequest new");
-        req = new TAsyncRequest( aStatus, aAsyncClient, aA1, aA2, aRequestType );
-        }
-    return req;
-    }
-
-// -----------------------------------------------------------------------------
-// DDeviceReqHandler::ReleaseRequest
-// -----------------------------------------------------------------------------
-//
-void DDeviceReqHandler::ReleaseRequest( DDeviceReqHandler::TAsyncRequest* aReq )
-    {
-    if ( iFreeCount > KMaxFreeRequests )
-        {
-        VVHW_TRACE("DDeviceReqHandler::AllocRequest delete");
-        delete aReq;
-        }
-    else
-        {
-        aReq->AppendToList( &iFreeListRoot );
-        iFreeCount++;
-        }
-    }
-
-
-
-void DDeviceReqHandler::RemoveClientData( const TUint32 aProcId, const TUint32 aThreadId )
-    {
-    VVHW_TRACE("DDeviceReqHandler::RemoveClientData (%d/%d)", aProcId, aThreadId );
-    TPerThreadData* data( NULL );
-    for( TInt i=0; i < iClientData.Count(); ++i )
-        {
-        if( iClientData[i]->sameThread( aProcId, aThreadId ) )
-            {
-            data = iClientData[i];
-            iClientData.Remove(i);
-            if( data == iCurrClientData )
-                {
-                iCurrClientData = 0;
-                }
-            delete data;
-            break;
-            }
-        }
-    }
-
-TBool DDeviceReqHandler::InitiateRequestWithReply( TAsyncRequest* aRec, TAny* aTransactionData )
-    {
-    VVHW_TRACE("DDeviceReqHandler::InitiateRequestWithReply" );
-    if( iDriverRfcThreadId == 0 || iDriverRfcProcessId == 0 )
-        {
-        iDriverRfcProcessId = Kern::CurrentProcess().iId;
-        iDriverRfcThreadId  = Kern::CurrentThread().iId;
-        }
-    //iReqIssueMutex.Wait();
-    const TUint32 serializedLength( aRec->iRemoteFunctionCall.SerialisedLength() );
-    if ( !iRequestBuffer.CheckForSpace( serializedLength ) )
-       {
-       return EFalse;
-       }
-    ++iTransactionId;
-    aRec->iRemoteFunctionCall.SetTransactionId( iTransactionId );
-    aRec->iRemoteFunctionCall.SetOperationType( RemoteFunctionCallData::EOpRequestWithReply );
-    aRec->iAsyncClient = &(Kern::CurrentThread());
-    aRec->iRemoteFunctionCall.SetThreadInformation( iDriverRfcProcessId, iDriverRfcThreadId );
-    
-    iSchedulerInitiatedTransactionIds.Append( TTransactionInfo( iTransactionId, aTransactionData ) );
-    VVHW_TRACE("DDeviceReqHandler::InitiateRequestWithReply ids len=%d transaction id = %u proc/thread = %u / %u api/op = %0x / %0x", iSchedulerInitiatedTransactionIds.Count(), iTransactionId, Kern::CurrentProcess().iId, Kern::CurrentThread().iId, aRec->iRemoteFunctionCall.Header().iApiUid, aRec->iRemoteFunctionCall.Header().iOpCode );
-    if( aRec->iRemoteFunctionCall.Header().iApiUid )
-        {
-        VVHW_TRACE("DDeviceReqHandler::InitiateRequestWithReply request's api is SERIALISED_DRIVER_API_UID" );
-        }
-    
-    iSerializedRequestRoot.AppendToLast( aRec );//we need the result, so add to the dfc handled requests
-    TDataFromClientSpaceCopier datacopier( aRec->iAsyncClient );
-    SerializedFunctionCall sfc( aRec->iRemoteFunctionCall );
-    
-    sfc.SetDataCopier( &datacopier );//We know this is a "request" (precondition)
-    const TUint32 base( iRequestBuffer.AllocateBytes( serializedLength ) );
-    //Next, serialize the call to the HW memory
-    const TLinAddr paramAddr( iHwInterface.InputParametersAddress() + base );
-    TInt len = sfc.WriteToBuffer( reinterpret_cast<TUint8*>(paramAddr), VVI_PARAMETERS_INPUT_MEMORY_SIZE - 1 - base );
-    VVHW_TRACE("DDeviceReqHandler::InitiateRequestWithReply len = %d", len);
-    sfc.SetDataCopier( NULL );
-    iRequestBuffer.CommitBytes( base, serializedLength );
-    iHwInterface.IssueCommand( VVI_EXECUTE );
-    VVHW_TRACE("DDeviceReqHandler::InitiateRequestWithReply issued");
-    return ETrue;
-    }
-
-/**
- * This routine adds extra info about the sgImage's pbuffer handle for syncing,
- * when that is required. 
- * 1. checks the sgImage handle, and if it's not NULL, then
- *  2. Get the sgImage's metadata
- *  3. Check if the vgImage is "dirty", and if yes,
- *      then append the pbuffer handle as a parameter to the call   
- *  4. Set the pbuffer "dirty", if aSetBufferDirty is ETrue
- */
-
-void DDeviceReqHandler::getVGSyncInOp( TAsyncRequest* aReq, TInt aSgHandleIndexInReq, TBool aSetBufferDirty )
-    {    
-    VVHW_TRACE( "DDeviceReqHandler::getVGSyncInOp" );
-    OpenVgRFC call( aReq->iRemoteFunctionCall );
-    TUint64 sgId(NULL);
-    
-    if( call.Data().Header().iParameterCount > aSgHandleIndexInReq )
-        {
-        call.GetTUint64( sgId, aSgHandleIndexInReq );
-        }
-    else
-        {
-        return;//No sgImage handle appended on the client side, just exit
-        }
-    
-#ifdef FAISALMEMON_S4_SGIMAGE
-    EGLSurface surface( EGL_NO_SURFACE );//The pbuffer surface to sync from, if needed
-    VGboolean syncNeeded = VG_FALSE;
-    if( sgId != NULL )
-        {
-        VVHW_TRACE( "DDeviceReqHandler::getVGSyncInOp SgImage-backing VGImage found" );
-        DSgResource* resource;
-        HBuf8* data = OpenSgImageMetaData( sgId, resource );
-        if( data )
-            {
-            TSgImageMetaData sginfo (((TPckgBuf<TSgImageMetaData>*) data)->operator ()());
-            
-            if( !sginfo.iVGImageClean )
-                {
-                //set the sync bit as clean now.
-                sginfo.iVGImageClean = ETrue;
-                //Additional info for the host side to use
-                syncNeeded = VG_TRUE;
-                surface = sginfo.iPbufferHandle;
-                }
-            if( aSetBufferDirty )
-                {
-                sginfo.iPbufferClean = EFalse;
-                }
-            resource->SetMetaData( *data );
-            delete data;//delete the copy of the metadata descriptor
-            }
-        }
-    if( syncNeeded )
-        {
-        call.AppendParam ( (int)surface );
-        }
-#endif
-    }
-
-
-void DDeviceReqHandler::ConsumeSchedulerInitiatedRequestResult( TAsyncRequest* aReq )
-    {
-    const TUint32 proc_id( aReq->iRemoteFunctionCall.Header().iProcessId );
-    const TUint32 thread_id( aReq->iRemoteFunctionCall.Header().iThreadId );
-    const TUint32 apicode( aReq->iRemoteFunctionCall.Header().iApiUid );
-    const TUint32 opcode( aReq->iRemoteFunctionCall.Header().iOpCode );
-    VVHW_TRACE( "DDeviceReqHandler::ConsumeSchedulerInitiatedRequestResult: process/thread id : %d / %d", Kern::CurrentProcess().iId, Kern::CurrentThread().iId );
-    VVHW_TRACE( "DDeviceReqHandler::ConsumeSchedulerInitiatedRequestResult: process/thread id : %d / %d API/opcode = %0x/%0x", proc_id, thread_id, apicode, opcode );
-    TPerThreadData* data(0);
-    for( TInt i=0; i < iClientData.Count(); ++i )
-        {
-        if( iClientData[i]->sameThread( proc_id, thread_id ))
-            {
-            data = iClientData[i];
-            break;
-            }
-        }
-    
-    switch ( apicode )
-        {
-        case SERIALISED_DRIVER_API_UID:
-            {
-            switch( opcode )
-                {
-                case DriverRFC::EDrvCreatePbufferSg:
-                    {
-                    VVHW_TRACE( "DDeviceReqHandler::ConsumeSchedulerInitiatedRequestResult : EDrvCreatePbufferSg" );
-#ifdef FAISALMEMON_S4_SGIMAGE
-                    if( iSchedulerInitiatedTransactionData )
-                        {
-                        ((TSgImageMetaData*)iSchedulerInitiatedTransactionData)->iPbufferHandle = aReq->iRemoteFunctionCall.Header().iReturnValue;
-                        VVHW_TRACE( "DDeviceReqHandler::ConsumeSchedulerInitiatedRequestResult pbuffer=%u", ((TSgImageMetaData*)iSchedulerInitiatedTransactionData)->iPbufferHandle );
-                        }
-                    TPbSId obj ( ((TSgImageMetaData*)iSchedulerInitiatedTransactionData)->iPbufferHandle,
-                                 ((TSgImageMetaData*)iSchedulerInitiatedTransactionData)->iSgId );
-                    iPbufferSgMap.InsertInOrder( obj, iPbufferSgMapOrder );
-                    VVHW_TRACE( "pbuffer creation RequestComplete. Inserted (%u, %u) into sg map. Notify thread %u, request status %u",
-                                                                    ((TSgImageMetaData*)iSchedulerInitiatedTransactionData)->iPbufferHandle,
-                                                                    ((TSgImageMetaData*)iSchedulerInitiatedTransactionData)->iSgId,
-                                                                    aReq->iAsyncClient,
-                                                                    aReq->iStatus );
-                    *(aReq->iStatus) = 0;//REquestComplete doesn't work
-#endif
-                    VVHW_TRACE( "Pbuffer creation RequestComplete" );
-                    break;
-                    }
-                case DriverRFC::EDrvCreateVGImageSg:
-                    {
-                    VVHW_TRACE( "DDeviceReqHandler::ConsumeSchedulerInitiatedRequestResult : EDrvCreateVGImageSg" );
-#ifdef FAISALMEMON_S4_SGIMAGE
-                    if( iSchedulerInitiatedTransactionData )
-                        {
-                        ((TSgImageMetaData*)iSchedulerInitiatedTransactionData)->iVGImageHandle = aReq->iRemoteFunctionCall.Header().iReturnValue;
-                        }
-                    TVGISId obj ( ((TSgImageMetaData*)iSchedulerInitiatedTransactionData)->iVGImageHandle,
-                                 ((TSgImageMetaData*)iSchedulerInitiatedTransactionData)->iSgId );
-                    iVGImageSgMap.InsertInOrder( obj, iVGImageSgMapOrder );
-                    VVHW_TRACE( "pbuffer creation RequestComplete. Inserted (%u, %u) into sg map. Notify thread %u, request status %u",
-                               ((TSgImageMetaData*)iSchedulerInitiatedTransactionData)->iVGImageHandle,
-                               ((TSgImageMetaData*)iSchedulerInitiatedTransactionData)->iSgId,
-                               aReq->iAsyncClient,
-                               aReq->iStatus );
-                    *(aReq->iStatus) = 0;//REquestComplete doesn't work
-#endif
-                    VVHW_TRACE( "VGImage creation RequestComplete" );
-                    break;
-                    }
-                case DriverRFC::EDrvDeleteSgImage:
-                    {
-                    *(aReq->iStatus) = 0;
-                    }
-                case DriverRFC::EDrvSyncVGImageFromPBuffer:
-                    {
-                    ((TAsyncRequest*)iSchedulerInitiatedTransactionData)->AppendToList( (TAsyncRequest*)(&iPendingRequestRoot) );
-                    break;
-                    }
-                default:
-                    {
-                    break;
-                    }
-                }
-            }
-        case SERIALISED_OPENVG_API_UID:
-            {
-            switch( opcode )
-                {
-                case OpenVgRFC::EvgGetError:
-                    {
-                    VVHW_TRACE("OpenVgRFC::EvgGetError");
-                    data->iErrorVG = aReq->iRemoteFunctionCall.Header().iReturnValue;
-                    data->iErrUpdatedVG = EFalse;//TODO: ETrue
-                    break;
-                    }
-                default:{break;}
-                }
-            break;
-            }
-        case SERIALISED_EGL_API_UID:
-            {
-            switch( opcode )
-                {
-                case EglRFC::EeglGetError:
-                    {
-                    VVHW_TRACE("EglRFC::EeglGetError");
-                    data->iErrorEGL = aReq->iRemoteFunctionCall.Header().iReturnValue;
-                    data->iErrUpdatedEGL = EFalse;//TODO: ETrue
-                    break;
-                    }
-                default:
-                    {break;}
-                }
-            break;
-            }
-        case SERIALISED_OPENGLES_1_1_API_UID:
-            {
-            switch( opcode )
-                {
-                case OpenGlES11RFC::EglGetError:
-                    {
-                    VVHW_TRACE("OpenGlES11RFC::EglGetError");
-                    data->iErrorGLES = aReq->iRemoteFunctionCall.Header().iReturnValue;
-                    data->iErrUpdatedGLES = EFalse;//TODO: ETrue
-                    }
-                default:{break;}
-                }
-            break;
-            }
-        default:{break;}
-        }
-
-    VVHW_TRACE( "DDeviceReqHandler::ConsumeSchedulerInitiatedRequestResult return value: %d", aReq->iRemoteFunctionCall.Header().iReturnValue );
-    if( data )
-        {
-        VVHW_TRACE("errors EGL/VG/GLES=%0x/%0x/%0x", data->iErrorEGL, data->iErrorVG, data->iErrorGLES );
-        }
-    //Delete the request object, as it is no longer needed
-    aReq->iStatus = 0;
-    aReq->iAsyncClient = 0;
-    delete aReq;
-    VVHW_TRACE("DDeviceReqHandle::ConsumeSchedulerInitiatedRequestResult done.");
-    }
-
-#ifdef FAISALMEMON_S4_SGIMAGE
-/**
- * DDeviceReqHandler::CreateSgImagePbuffer
- * @param aInfo the info 
- */
-void DDeviceReqHandler::CreateSgImagePbuffer( const TSgImageMetaData& aInfo, TRequestStatus* aStatus, DThread* aThread )
-    {
-    //eglCreatePbufferSurface
-    //
-    VVHW_TRACE("DDeviceReqHandler::CreateSgImagePbuffer ->");
-    if( !iCurrClientData )
-        {return;}
-    TBool allok = ETrue;
-    TAsyncRequest* req(0);
-    TPckg<TUint32> res( iOpReturn );
-    *aStatus = KRequestPending;
-    VVHW_TRACE("DDeviceReqHandler::CreateSgImagePbuffer request from thread %u, requeststatus %u", aThread, aStatus );
-    req = AllocRequest( aStatus, aThread, NULL, (TAny*)(&res), TAsyncRequest::ERTRequest );
-    if( req )
-        {
-        DriverRFC call( req->iRemoteFunctionCall );
-        call.Init( DriverRFC::EDrvCreatePbufferSg );
-        
-        call.AppendEGLint  ( aInfo.iSizeInPixels.iWidth );
-        call.AppendEGLint  ( aInfo.iSizeInPixels.iHeight );
-        call.AppendEGLint  ( aInfo.iPixelFormat );
-
-        TPckg<RemoteFunctionCallData> data( req->iRemoteFunctionCall );
-        req->iA1 = (TAny*)( &data );
-        allok = InitiateRequestWithReply( req, (TAny*)(&aInfo) );
-        }
-    if( !allok )
-        {
-        //request not sent, or something else went wrong. Tell the client its over
-        //TODO: somehow dispose of the pbuffer that might have been created
-        }
-    while( *(aStatus) == KRequestPending )
-        {
-        NKern::Sleep( 20 );   
-        }
-    VVHW_TRACE("DDeviceReqHandler::CreateSgImagePBuffer <-");
-    return;
-    }
-
-void DDeviceReqHandler::CreateSgImageVGImage( const TSgImageMetaData& aInfo, TRequestStatus* aStatus, DThread* aThread )
-    {
-    //eglCreatePbufferSurface
-    //
-    VVHW_TRACE("DDeviceReqHandler::CreateSgImageVGImage ->");
-    if( !iCurrClientData )
-        {return;}
-    TBool allok = ETrue;
-    TAsyncRequest* req(0);
-    TPckg<TUint32> res( iOpReturn );
-    *aStatus = KRequestPending;
-    //make a request for the vgImage
-    req = AllocRequest( aStatus, aThread, NULL, (TAny*)(&res), TAsyncRequest::ERTRequest );
-    if( req )
-        {
-        DriverRFC call( req->iRemoteFunctionCall );
-        call.Init( DriverRFC::EDrvCreateVGImageSg );
-        
-        call.AppendEGLint  ( aInfo.iSizeInPixels.iWidth );
-        call.AppendEGLint  ( aInfo.iSizeInPixels.iHeight );
-        call.AppendEGLint  ( aInfo.iPixelFormat );
-
-        TPckg<RemoteFunctionCallData> data( req->iRemoteFunctionCall );
-        req->iA1 = (TAny*)(&data);
-        allok = InitiateRequestWithReply( req, (TAny*)(&aInfo) );
-        }
-    if( !allok )
-        {
-        //request not sent, or something else went wrong. Tell the client its over
-        //TODO: somehow dispose of the image that might have been created
-        //Kern::RequestComplete( aStatus, KErrGeneral );
-        }
-    while( *(aStatus) == KRequestPending )
-        {
-        NKern::Sleep( 20 );
-        }
-    VVHW_TRACE("DDeviceReqHandler::CreateSgImageVGImage <-");
-    return;
-    }
-#endif
-
-TInt DDeviceReqHandler::DestroySgImage( const TUint64 aId )
-    {
-    VVHW_TRACE("DDeviceReqHandler::DestroySgImage ->");
-    
-#ifdef FAISALMEMON_S4_SGIMAGE
-    TBool allok = ETrue;
-    TAsyncRequest* req(0);
-    TPckg<TUint32> res( iOpReturn );
-    EGLSurface surface(0);
-    VGImage    image(0);
-    DSgResource* resource;
-    HBuf8* data = OpenSgImageMetaData( aId, resource );
-    if( data )
-        {
-        TSgImageMetaData sginfo (((TPckgBuf<TSgImageMetaData>*) data)->operator ()());
-        surface = sginfo.iPbufferHandle;
-        //TODO: are there other cases: e.g. can the vgimage be destroyed without destroying the surface?
-        if( sginfo.iUsage || ESgUsageBitOpenVgImage )
-            {
-            image = sginfo.iVGImageHandle;
-            }
-        delete data;
-        }
-    TRequestStatus status = KRequestPending;
-    //make a request for the vgImage
-    req = AllocRequest( &status, &Kern::CurrentThread(), NULL, (TAny*)(&res), TAsyncRequest::ERTRequest );
-    allok = (req?EFalse:ETrue);
-    if( req )
-        {
-        DriverRFC call( req->iRemoteFunctionCall );
-        call.Init( DriverRFC::EDrvDeleteSgImage );
-        
-        call.AppendEGLSurface( surface );
-        call.AppendVGParam ( image );
-
-        TPckg<RemoteFunctionCallData> data( req->iRemoteFunctionCall );
-        req->iA1 = (TAny*)(&data);
-        allok = InitiateRequestWithReply( req, 0 );
-        }
-    if( !allok )
-        {
-        //TODO
-        }
-    while( status == KRequestPending )
-        {
-        NKern::Sleep( 20 );
-        }
-#endif
-
-    VVHW_TRACE("DDeviceReqHandler::DestroySgImage <-");
-    return 1;
-    }
-
-
-DDeviceReqHandler::TRequestMode DDeviceReqHandler::InterpretRequest( TAsyncRequest* aReq )
-    {
-    TRequestMode alreadyProcessed( ENormal );//processed here? The return value
-    const TUint32 proc_id( aReq->iRemoteFunctionCall.Header().iProcessId );
-    const TUint32 thread_id( aReq->iRemoteFunctionCall.Header().iThreadId );
-    const TUint32 apicode( aReq->iRemoteFunctionCall.Header().iApiUid );
-    const TUint32 opcode( aReq->iRemoteFunctionCall.Header().iOpCode );
-    
-    VVHW_TRACE( "DDeviceReqHandler::InterpretRequest in the process/thread %0x / %0x", Kern::CurrentProcess().iId, Kern::CurrentThread().iId );
-    
-    TBool ErrUpdatedVG = EFalse;//is the error updated during this function call
-    TBool ErrUpdatedEGL = EFalse;//is the error updated during this function call
-    TBool ErrUpdatedGLES = EFalse;//is the error updated during this function call
-    //Get a data object to work with
-    //(either a previously used client data object, or create a new one)
-    TPerThreadData* data(NULL);
-    if( iCurrClientData &&
-        iCurrClientData->sameThread( proc_id, thread_id ))
-        {
-        //the same client as previously
-        data = iCurrClientData;
-        }
-    else
-        {
-        //Check if this client is already known
-        for( TInt i=0; i < iClientData.Count(); ++i )
-            {
-            if( iClientData[i]->sameThread( proc_id, thread_id ))
-                {
-                data = iClientData[i];
-                break;
-                }
-            }
-        if( !data )
-            {
-            data = new TPerThreadData( aReq->iStatus, aReq->iAsyncClient, proc_id, thread_id );
-            iClientData.Append( data );
-            }
-        if( iCurrClientData )
-            {
-            VVHW_TRACE( "DDeviceReqHandler::InterpretRequest: SWITCHING CONTEXT: %d / %d -> %d / %d",
-                    iCurrClientData->iProcessId,
-                    iCurrClientData->iThreadId,
-                    proc_id,
-                    thread_id );
-            //Some other things need to be done here as well, as per 5.2 in the "Implementing SgImage" design doc
-            //TODO: currently the context switch does not need to be done on this level
-            }
-        //Context switched, or no previous client. Current set to new current.
-        iCurrClientData = data;
-        }
-    //Invariant: "data" and "iCurrClient" are the same and not null after this line
-    VVHW_TRACE("DDeviceReqHandler::InterpretRequest: number of clients = %d", iClientData.Count() );
-    
-    
-    iCurrClientData->iCurrApiUid = apicode;
-    iCurrClientData->iCurrOpCode = opcode;
-    VVHW_TRACE( "DDeviceReqHandler::InterpretRequest: process/thread id : %d / %d API/opcode = %d/%0x", proc_id, thread_id, apicode, opcode );
-    
-    
-    switch ( apicode )
-        {
-        case SERIALISED_DRIVER_API_UID:
-            {
-            VVHW_TRACE("Driver request (must be a shutdown for %d / %d)", proc_id, thread_id  );
-            if( opcode == DriverRFC::EDrvClientShutdown )
-                {
-                RemoveClientData( proc_id, thread_id );
-                }
-            break;
-            }
-        case SERIALISED_OPENVG_API_UID:
-            {
-            VVHW_TRACE("OpenVG request" );
-            switch( opcode )
-                {
-                case OpenVgRFC::EvgGetError:
-                    {
-                    break;
-                    }
-                //We need to catch all the operations that create or access VGImage buffers
-                case OpenVgRFC::EvgChildImage:
-                    {
-                    VVHW_TRACE("vgChildImage" );
-                    break;
-                    }
-                case OpenVgRFC::EvgDestroyImage:
-                    {
-                    VVHW_TRACE("vgDestroyImage" );
-                    break;
-                    }
-                case OpenVgRFC::EvgFinish:
-                    {
-                    VVHW_TRACE("vgFinish" );
-                    //A sync is required if there are any native pixmaps backing surfaces in the current context
-                    break;
-                    }
-                /* 
-                The sgImage ID is a 64-bit value, it has to be serialised as 2 32-bit values, thus occupying
-                2 parameter slots each. The sgImage ID position is thus the second last + last parameters in the 
-                parameter list
-                */ 
-                case OpenVgRFC::EvgClearImage:
-                    {
-                    VVHW_TRACE("vgClearImage" );
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-2 );
-                    break;
-                    }
-                case OpenVgRFC::EvgImageSubData:
-                    {
-                    VVHW_TRACE("vgImageSubData" );
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-2 );
-                    break;
-                    }
-                case OpenVgRFC::EvgGetPixels:
-                    {
-                    VVHW_TRACE("vgGetPixels" );
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-2 );
-                    break;
-                    }
-                case OpenVgRFC::EvgSetPixels:
-                    {
-                    VVHW_TRACE("vgSetPixels" );
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-2 );
-                    break;
-                    }
-                case OpenVgRFC::EvgCopyImage:
-                    {
-                    VVHW_TRACE("vgCopyImage" );
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-2 );
-                    break;
-                    }
-                case OpenVgRFC::EvgDrawImage:
-                    {
-                    VVHW_TRACE("vgDrawImage" );
-                    break;
-                    }
-                case OpenVgRFC::EvgColorMatrix:
-                    {
-                    VVHW_TRACE("vgColorMatrix" );
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-4 );//dst
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-2 );//src
-                    break;
-                    }
-                case OpenVgRFC::EvgConvolve:
-                    {
-                    VVHW_TRACE("vgConvolve" );
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-4 );//dst
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-2 );//src
-                    break;
-                    }
-                case OpenVgRFC::EvgSeparableConvolve:
-                    {
-                    VVHW_TRACE("vgSeparableConvolve" );
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-4 );//dst
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-2 );//src
-                    break;
-                    }
-                case OpenVgRFC::EvgGaussianBlur:
-                    {
-                    VVHW_TRACE("vgGaussianBlur" );
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-4 );//dst
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-2 );//src
-                    break;
-                    }
-                case OpenVgRFC::EvgLookup:
-                    {
-                    VVHW_TRACE("vgLookup" );
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-4 );//dst
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-2 );//src
-                    break;
-                    }
-                case OpenVgRFC::EvgLookupSingle:
-                    {
-                    VVHW_TRACE("vgLookupSingle" );
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-4 );//dst
-                    getVGSyncInOp( aReq, aReq->iRemoteFunctionCall.Header().iParameterCount-2 );//src
-                    break;
-                    }
-                case OpenVgRFC::EvgPathBounds:
-                    {
-                    VVHW_TRACE("vgPathBounds" );
-                    break;
-                    }
-                default:
-                    {
-                    break;
-                    }
-                }
-            break;
-            }
-        case SERIALISED_EGL_API_UID:
-            {
-            VVHW_TRACE("EGL request" );
-            switch( opcode )
-                {
-                case EglRFC::EeglMetaSgGetHandles:
-                    {
-                    VVHW_TRACE("EglRFC::EeglMetaSgGetHandles" );
-                    EglRFC call( aReq->iRemoteFunctionCall );
-                    TUint64 id(0);
-                    EGLint* handles;
-                    EGLint handles_size;
-                    
-                    call.GetTUint64( id, 0 );
-                    call.GetEGLintVectorData( handles, handles_size, 2 );
-#ifdef FAISALMEMON_S4_SGIMAGE
-                    DSgResource* resource;
-                    VVHW_TRACE("EglRFC::EeglMetaSgGetHandles openSgImageMetaData" );
-                    HBuf8* data = OpenSgImageMetaData( id, resource );
-                    if( data && handles_size >= 2 )
-                        {
-                        TSgImageMetaData sginfo (((TPckgBuf<TSgImageMetaData>*) data)->operator ()());
-                        handles[0] = sginfo.iPbufferHandle;
-                        handles[1] = sginfo.iVGImageHandle;
-                        call.SetReturnValue( (int)EGL_TRUE );
-                        }
-                    else
-                        {
-                        call.SetReturnValue( (int)EGL_FALSE );
-                        }
-                    alreadyProcessed = EHandled;
-#endif
-					break;
-                    }
-                case EglRFC::EeglCreateContext:
-                    {
-                    //if no share_context specified, pass the sgImage pool context
-                    VVHW_TRACE("eglCreateContext" );
-                    break;
-                    }
-                case EglRFC::EeglMakeCurrent:
-                    {
-                    EGLDisplay dpy;
-                    EGLSurface draw;
-                    EGLSurface read;
-                    EGLContext ctx;
-                    EGLint syncRequirement(0);//no sync = 0
-                    
-                    EglRFC call( aReq->iRemoteFunctionCall );
-                    call.GetEGLDisplay( dpy, 0 );
-                    call.GetEGLSurface( draw, 1 );
-                    call.GetEGLSurface( read, 2 );
-                    call.GetEGLContext( ctx, 3 );
-                    VGImage img = 0;
-                    
-                    TPbSId obj ( draw, 0 );
-
-                    TInt sgIdIndex = iPbufferSgMap.FindInOrder( obj, iPbufferSgMapOrder );
-                    if( sgIdIndex != KErrNotFound )
-                        {
-#ifdef FAISALMEMON_S4_SGIMAGE
-                        DSgResource* resource;
-                        HBuf8* data = OpenSgImageMetaData( iPbufferSgMap[sgIdIndex].iSgId, resource );
-                        if( data )
-                            {
-                            TSgImageMetaData sginfo (((TPckgBuf<TSgImageMetaData>*) data)->operator ()());
-                            
-                            if( !sginfo.iPbufferClean )
-                                {
-                                img = sginfo.iVGImageHandle;
-                                //sync with the underlying pbuffer surface
-                                syncRequirement = syncRequirement | KSyncDrawSurface;
-                                call.AppendEGLint( img );
-                                }
-                            delete data;
-                            }
-#endif
-                        }
-                    obj.iPbuffer = read;
-                    obj.iSgId = 0;
-
-                    sgIdIndex = iPbufferSgMap.FindInOrder( obj, iPbufferSgMapOrder );
-                    if( sgIdIndex != KErrNotFound )
-                        {
-#ifdef FAISALMEMON_S4_SGIMAGE
-                        DSgResource* resource;
-                        HBuf8* data = OpenSgImageMetaData( iPbufferSgMap[sgIdIndex].iSgId, resource );
-                        if( data )
-                            {
-                            TSgImageMetaData sginfo (((TPckgBuf<TSgImageMetaData>*) data)->operator ()());
-                            
-                            if( !sginfo.iPbufferClean )
-                                {
-                                img = sginfo.iVGImageHandle;
-                                //sync with the underlying pbuffer surface
-                                syncRequirement = syncRequirement | KSyncReadSurface;
-                                }
-                            delete data;
-                            }
-#endif
-                        }
-                    call.AppendEGLint( syncRequirement );
-                    call.AppendEGLint( img );
-                    
-                    VVHW_TRACE("eglMakeCurrent %u", iCurrClientData->iContext );
-                    break;
-                    }
-                case EglRFC::EeglMakeCurrentSg:
-                    {
-                    VVHW_TRACE("eglMakeCurrentSg" );
-                    break;
-                    }
-                case EglRFC::EeglCreatePixmapSurfaceSg:
-                    {
-                    alreadyProcessed = EHandled;//This will be handled here
-                    
-                    TUint64 sgId;
-                    EglRFC call( aReq->iRemoteFunctionCall );
-                    call.GetTUint64( sgId, 0 );//get the sgImage id
-                    
-#ifdef FAISALMEMON_S4_SGIMAGE
-                    DSgResource* resource;
-                    HBuf8* data = OpenSgImageMetaData( sgId, resource );
-                    if( data )
-                        {
-                            TSgImageMetaData sginfo (((TPckgBuf<TSgImageMetaData>*) data)->operator ()());
-                            resource->SetMetaData( (*data) );
-                            aReq->iRemoteFunctionCall.SetReturnValue( sginfo.iPbufferHandle );
-                            delete data;
-                        }
-                    else
-                        {
-                        aReq->iRemoteFunctionCall.SetReturnValue( EGL_NO_SURFACE );
-                        }
-                    //Find the sgimage's pbuffer surface, then return that
-#endif
-                    VVHW_TRACE( "EeglCreatePixmapSurfaceSg" );
-                    break;
-                    }
-                case EglRFC::EeglCreatePbufferFromClientBuffer:
-                    {
-                    //if a sgImage-backing VGImage handle is passed here, then fail with EGL_BAD_ACCESS
-                    
-                    VVHW_TRACE("eglCreatePbufferFromClientBuffer" );
-                    break;
-                    }
-                case EglRFC::EeglGetError:
-                    {
-                    VVHW_TRACE("eglGetError" );
-                    break;
-                    }
-                default:
-                    {
-                    break;
-                    }
-                }//switch opcode (EGL)
-                
-            break;
-            }
-        case SERIALISED_OPENGLES_1_1_API_UID:
-            {
-            VVHW_TRACE("OpenGLES request" );
-            switch( opcode )
-                {
-                case OpenGlES11RFC::EglGetError:
-                    {
-                    //Get the GLES error
-                    }
-                default:
-                    {
-                    break;
-                    }
-                }
-            break;
-            }
-        default:
-            {
-            break;
-            }
-        }//switch apicode
-    //VVHW_TRACE( "DDeviceReqHandler::InterpretRequest: opcode : %d ", data->iCurrOpCode );
-    if( iCurrClientData )//This could have been removed, in a call to RemoveClientData
-        {
-        iCurrClientData->iErrUpdatedVG = ErrUpdatedVG;
-        iCurrClientData->iErrUpdatedEGL = ErrUpdatedEGL;
-        iCurrClientData->iErrUpdatedGLES = ErrUpdatedGLES;
-        }
-    return alreadyProcessed;
-    }
-
-#ifdef FAISALMEMON_S4_SGIMAGE
-HBuf8* DDeviceReqHandler::OpenSgImageMetaData( const TUint64 aId, DSgResource*& aResource )
-    {
-    VVHW_TRACE("DDeviceReqHandler::OpenSgImageMetaData 0x%lx", aId );
-    aResource = 0;
-    HBuf8* data(0);
-    TInt sgOpenErr( KErrNone );
-    
-    sgOpenErr = SgExtension::FindAndOpenResource( aId, aResource );//Open the sgimage resource
-    VVHW_TRACE(" sgOpenErr %d", sgOpenErr);
-    if( sgOpenErr == KErrNone )
-        {
-        data = HBuf8::New( aResource->GetMetaDataSize() );
-        if( data )
-            {
-            aResource->GetMetaData( (*data) );
-            }
-        }
-    return data;//If there was a problem, this is zero. Ownership belongs to caller
-    }
-#endif