diff -r 000000000000 -r c9bc50fca66e usbmgmt/usbmgr/device/classdrivers/acm/classimplementation/ecacm/src/ActiveWriter.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbmgmt/usbmgr/device/classdrivers/acm/classimplementation/ecacm/src/ActiveWriter.cpp	Tue Feb 02 02:02:59 2010 +0200
@@ -0,0 +1,182 @@
+/*
+* Copyright (c) 1997-2009 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:
+*
+*/
+
+#include <e32std.h>
+#include <d32usbc.h>
+#include "ActiveWriter.h"
+#include "AcmConstants.h"
+#include "AcmPanic.h"
+#include "WriteObserver.h"
+#include "AcmUtils.h"
+#include <usb/usblogger.h>
+
+#ifdef __FLOG_ACTIVE
+_LIT8(KLogComponent, "ECACM");
+#endif
+
+CActiveWriter::CActiveWriter(MWriteObserver& aParent, RDevUsbcClient& aLdd, TEndpointNumber aEndpoint)
+ :	CActive(KEcacmAOPriority), 
+	iParent(aParent),
+	iLdd(aLdd),
+	iEndpoint(aEndpoint),
+	iFirstPortion(NULL, 0),
+	iSecondPortion(NULL, 0)
+/**
+ * Constructor.
+ *
+ * @param aParent The object that will be notified when write requests 
+ * complete.
+ * @param aLdd The LDD handle to be used for posting write requests.
+ * @param aEndpoint The endpoint to write to.
+ */
+	{
+	CActiveScheduler::Add(this);
+	}
+
+CActiveWriter::~CActiveWriter()
+/**
+ * Destructor.
+ */
+	{
+	LOG_FUNC
+
+	Cancel();
+	}
+
+CActiveWriter* CActiveWriter::NewL(MWriteObserver& aParent, 
+								   RDevUsbcClient& aLdd,
+								   TEndpointNumber aEndpoint)
+/**
+ * Standard two phase constructor.
+ *
+ * @param aParent The object that will be notified when write requests 
+ * complete.
+ * @param aLdd The LDD handle to be used for posting write requests.
+ * @param aEndpoint The endpoint to write to.
+ * @return Ownership of a new CActiveWriter object.
+ */
+	{
+	LOG_STATIC_FUNC_ENTRY
+
+	CActiveWriter* self = new(ELeave) CActiveWriter(aParent, aLdd, aEndpoint);
+	return self;
+	}
+
+void CActiveWriter::Write(const TDesC8& aDes, 
+					TInt aLen, 
+					TBool aZlp)
+/**
+ * Write the given data to the LDD.
+ *
+ * @param aDes A descriptor to write.
+ * @param aLen The length to write.
+ * @param aZlp Whether ZLP termination may be required.
+ */
+	{
+	LOGTEXT(_L8(">>CActiveWriter::Write"));
+
+	if ( aZlp )
+		{
+		// the driver can be relied on to correctly handle appended ZLPs
+		// so use them when necessary..
+		iLdd.Write(iStatus, iEndpoint, aDes, aLen, ETrue);
+		iWritingState = ECompleteMessage;
+		}
+	else
+		{
+		// do we need to send this descriptor in two portions to
+		// avoid finishing the last packet on a 64 byte boundary ( avoiding
+		// expectations of a ZLP by drivers that would handle them ) ?
+		
+		// If the write request is for zero bytes a 'split' would be erroneous.
+		TBool full64BytePacket = ( aLen % KMaxPacketSize ) ? EFalse : ETrue;
+		
+		if ( full64BytePacket == EFalse || aLen == 0 )
+			{
+			iLdd.Write(iStatus, iEndpoint, aDes, aLen, EFalse);
+			iWritingState = ECompleteMessage;
+			LOGTEXT2(_L8("CActiveWriter::Writing %d bytes"), aLen);
+			}
+		else
+			{
+			// we do need to split the descriptor, sending aLen-1 bytes now 
+			// and sending a second portion with the remaining 1 byte later
+			iFirstPortion.Set(aDes.Left(aLen-1));
+			
+			// Use of Left here ensures that if we've been passed a descriptor
+			// longer than aLen (doesn't *currently* happen), we don't corrupt
+			// data.
+			iSecondPortion.Set(aDes.Left(aLen).Right(1));
+			
+			iLdd.Write(iStatus, iEndpoint, iFirstPortion, aLen-1, EFalse);
+			
+			iWritingState = EFirstMessagePart;
+			LOGTEXT3(_L8("CActiveWriter::Writing %d bytes of the %d"), aLen-1, aLen);
+			}
+		}
+	SetActive();
+
+	LOGTEXT(_L8("<<CActiveWriter::Write"));
+	}
+
+void CActiveWriter::DoCancel()
+/**
+ * Cancel an outstanding write.
+ */
+	{
+	LOG_FUNC
+
+	iLdd.WriteCancel(iEndpoint);
+	}
+
+void CActiveWriter::RunL()
+/**
+ * This function will be called when the write completes. It notifies the 
+ * parent class of the completion.
+ */
+	{
+	LOG_LINE
+	LOGTEXT2(_L8(">>CActiveWriter::RunL iStatus=%d"), iStatus.Int());
+	
+	if ( iWritingState == EFirstMessagePart )
+		{
+		if ( iStatus.Int() == KErrNone )
+			{			
+			// now send the second part..
+			iLdd.Write(iStatus, iEndpoint, iSecondPortion, iSecondPortion.Length(), EFalse);
+			iWritingState = EFinalMessagePart;
+			LOGTEXT(_L8("CActiveWriter::Writing 1 byte to complete original nx64 byte message"));
+
+			SetActive();
+			}
+		else
+			{
+			// the writing of the first part failed
+			iParent.WriteCompleted(iStatus.Int());
+			}
+		}
+	else 
+		{
+		// iWritingState == ECompleteMessage or EFinalMessagePart
+		iParent.WriteCompleted(iStatus.Int());
+		}
+		
+	LOGTEXT(_L8("<<CActiveWriter::RunL"));
+	}
+
+//
+// End of file