diff -r d3e8e7d462dd -r f92a4f87e424 usbdrv/peripheral/pdd/pil/src/queue.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbdrv/peripheral/pdd/pil/src/queue.cpp	Tue Aug 31 17:01:47 2010 +0300
@@ -0,0 +1,124 @@
+// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "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:
+// e32\drivers\usbcc\queue.cpp
+// Platform independent layer (PIL) of the USB Device controller driver:
+// Simple singly linked list + its iterator.
+// 
+//
+
+/**
+ @file queue.cpp
+ @internalTechnology
+*/
+//#include <drivers/usbc.h>
+#include <usb/usbc.h>
+
+
+void TSglQueLink::Enque(TSglQueLink* aLink)
+//
+// Enque this after aLink.
+//
+    {
+    iNext = aLink->iNext;
+    aLink->iNext = this;
+    }
+
+
+TSglQueBase::TSglQueBase(TInt aOffset)
+//
+// Constructor
+//
+    : iHead(NULL), iLast((TSglQueLink*) &iHead), iOffset(aOffset), iElements(0)
+    {
+    // ESQueOffsetNotAligned
+    __ASSERT_ALWAYS((iOffset % 4 == 0), Kern::Fault(KUsbPILPanicCat, __LINE__));
+    }
+
+
+void TSglQueBase::DoAddLast(TAny* aPtr)
+//
+// Add the object at the end of the queue.
+//
+    {
+    TSglQueLink* pL = PtrAdd((TSglQueLink*) aPtr, iOffset);
+    pL->Enque(iLast);
+    iLast = pL;
+    iElements++;
+    __ASSERT_DEBUG((iElements > 0), Kern::Fault(KUsbPILPanicCat, __LINE__));
+    }
+
+
+void TSglQueBase::DoRemove(TAny* aPtr)
+//
+// Remove the object from the queue.
+//
+    {
+    TSglQueLink* pP = (TSglQueLink*) (&iHead);
+    TSglQueLink* pL = PtrAdd((TSglQueLink*) aPtr, iOffset);
+    TSglQueLink* pN = pP->iNext;
+    while (pN)
+        {
+        if (pN == pL)
+            {
+            pP->iNext = pN->iNext;
+            if (iLast == pL)
+                {
+                iLast = pP;
+                if (iLast == NULL)
+                    iLast = (TSglQueLink*) (&iHead);
+                }
+            iElements--;
+            __ASSERT_DEBUG((iElements >= 0), Kern::Fault(KUsbPILPanicCat, __LINE__));
+            return;
+            }
+        pP = pN;
+        pN = pP->iNext;
+        }
+    // This doesn't have to indicate an error (but might):
+    __KTRACE_OPT(KPANIC, Kern::Printf("TSglQueBase::DoRemove: ESQueLinkNotQueued"));
+    }
+
+
+TSglQueIterBase::TSglQueIterBase(TSglQueBase& aQue)
+//
+// Constructor.
+//
+    : iOffset(aQue.iOffset), iHead(aQue.iHead), iNext(aQue.iHead)
+    {
+    }
+
+
+void TSglQueIterBase::SetToFirst()
+//
+// Start from the beginning of the que.
+//
+    {
+    iNext = iHead->iNext;
+    }
+
+
+TAny* TSglQueIterBase::DoPostInc()
+//
+// Return the current pointer and increment.
+//
+    {
+    TAny* pN = iNext;
+    if (pN == NULL)
+        return NULL;
+    iNext = iNext->iNext;
+    return PtrSub(pN, iOffset);
+    }
+
+
+//---