sl@0: // Copyright (c) 2005-2010 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: //
sl@0: 
sl@0: #include <s32buf.h>
sl@0: #include "SqlAssert.h"
sl@0: #include "IPCStream.h"
sl@0: #include "SqlSrvResourceProfiler.h"
sl@0: 
sl@0: /**
sl@0: Reads data from the stream buffer and sends them to the client.
sl@0: 
sl@0: @param aMessage The client message.
sl@0: 
sl@0: @return The number of bytes sent.
sl@0: 
sl@0: Usage of the IPC call arguments:
sl@0: Arg 0:            not used
sl@0: Arg 1: [in]       from which position to read
sl@0: Arg 2: [in/out]   IPC buffer
sl@0: Arg 3: [in]       max length of the requested data
sl@0: */
sl@0: TInt HIpcStream::ReadL(const RMessage2& aMessage)
sl@0: 	{
sl@0: 	TInt pos=aMessage.Int1();
sl@0: 	if (pos!=iRPos)
sl@0: 		iHost.SeekL(iHost.ERead,EStreamBeginning,pos);
sl@0: 	iRPos=-1;
sl@0: 	TInt len=aMessage.Int3();
sl@0: 	pos+=len;
sl@0: 	TInt tfr=len;
sl@0: 	for (;;)
sl@0: 		{
sl@0: 		TUint8 buf[KIpcStreamSize];
sl@0: 		TInt read=iHost.ReadL(buf,Min(tfr,KIpcStreamSize));
sl@0: 		if (read==0)
sl@0: 			break;
sl@0: 		aMessage.WriteL(2,TPtrC8(buf,read),len-tfr);
sl@0: 		SQLPROFILER_REPORT_IPC(ESqlIpcWrite, read);
sl@0: 		tfr-=read;
sl@0: 		if (tfr==0)
sl@0: 			break;
sl@0: 		if (read<KIpcStreamSize)
sl@0: 			break;
sl@0: 		}
sl@0: 	iRPos=pos-tfr;
sl@0: 	return len-tfr;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Reads data from the client message and stores the data in the stream buffer.
sl@0: 
sl@0: @param aMessage The client message.
sl@0: 
sl@0: @return The number of bytes read and stored in the stream buffer.
sl@0: 
sl@0: 
sl@0: Usage of the IPC call arguments:
sl@0: Arg 0:            not used
sl@0: Arg 1: [in]       from which position to write
sl@0: Arg 2: [in/out]   IPC buffer
sl@0: */
sl@0: void HIpcStream::WriteL(const RMessage2& aMessage)
sl@0: 	{
sl@0: 	TInt pos=aMessage.Int1();
sl@0: 	if (pos!=iWPos)
sl@0: 		iHost.SeekL(iHost.EWrite,EStreamBeginning,pos);
sl@0: 	iWPos=-1;
sl@0: 	TInt offset=0;
sl@0: 	TBuf8<KIpcStreamSize> buf;
sl@0: 	for (;;)
sl@0: 		{
sl@0: 		aMessage.ReadL(2,buf,offset);
sl@0: 		TInt len=buf.Length();
sl@0: 		SQLPROFILER_REPORT_IPC(ESqlIpcRead, len);
sl@0: 		if (len==0)
sl@0: 			break;
sl@0: 		iHost.WriteL(buf.Ptr(),len);
sl@0: 		offset+=len;
sl@0: 		if (len<KIpcStreamSize)
sl@0: 			break;
sl@0: 		}
sl@0: 	iWPos=pos+offset;
sl@0: 	}
sl@0: 
sl@0: /**
sl@0: Destroys HIpcReadBuf object.
sl@0: */
sl@0: void HIpcReadBuf::DoRelease()
sl@0: 	{
sl@0: 	delete this;
sl@0: 	}