--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbengines/usbotgwatcher/src/cusbbusactivityobserver.cpp	Fri Jun 04 10:27:39 2010 +0100
@@ -0,0 +1,234 @@
+/*
+ * Copyright (c) 2008 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:  Implementation
+ *
+ */
+
+#include <usbotgdefs.h>
+
+#include "cusbbusactivityobserver.h"
+
+#include "definitions.h"
+#include "debug.h"
+#include "panic.h"
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CUsbBusActivityObserver::CUsbBusActivityObserver() :
+    CActive(EPriorityStandard)
+    {
+    CActiveScheduler::Add(this);
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void CUsbBusActivityObserver::ConstructL()
+    {
+    LOG_FUNC
+
+    LEAVEIFERROR(iBusActivity.Attach(KUidUsbManCategory,
+            KUsbOtgConnectionIdleProperty));
+
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CUsbBusActivityObserver* CUsbBusActivityObserver::NewL()
+    {
+    LOG_FUNC
+
+    CUsbBusActivityObserver* self = new (ELeave) CUsbBusActivityObserver();
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    CleanupStack::Pop(self);
+    return self;
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CUsbBusActivityObserver::~CUsbBusActivityObserver()
+
+    {
+    LOG_FUNC
+
+    Cancel();
+
+    iBusActivity.Close();
+
+    iObservers.Close();
+
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CUsbBusActivityObserver::TBusActivity CUsbBusActivityObserver::BusActivity()
+    {
+
+    TInt val(0);
+
+    TInt err = iBusActivity.Get(val);
+
+    if (KErrNone != err)
+        {
+        LOG("ECanNotGetBusActivityProperty" );
+        PANIC( ECanNotGetBusActivityProperty);
+        }
+
+    return (0 == val ? EBusActive : EBusIdle);
+
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void CUsbBusActivityObserver::SubscribeL(MUsbBusActivityObserver& aObserver)
+    {
+    LOG_FUNC
+
+    // check if the same observer already exist in a list
+    if (KErrNotFound != iObservers.Find(&aObserver))
+        {
+        LOG( "Observer already exists" );
+        PANIC( EObserverAlreadyExists);
+        return;
+        }
+    iObservers.AppendL(&aObserver);
+
+    if (KFirst == iObservers.Count()) // first item
+        {
+        iBusActivity.Subscribe(iStatus);
+        SetActive();
+
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void CUsbBusActivityObserver::UnsubscribeL(MUsbBusActivityObserver& aObserver)
+    {
+    LOG_FUNC
+
+    TInt i(iObservers.Find(&aObserver));
+    if (KErrNotFound == i)
+        {
+        LOG( "Observer not found" );
+        PANIC( ECanNotFindBusActivityObserver);
+        return;
+        }
+
+    iObservers.Remove(i);
+
+    if (0 == iObservers.Count()) // no observers anymore
+        {
+        // cancel pending request
+        Cancel();
+        }
+    }
+
+// ---------------------------------------------------------------------------
+
+// ---------------------------------------------------------------------------
+//
+void CUsbBusActivityObserver::RunL()
+    {
+    LOG_FUNC
+
+    LOG1( "iStatus = %d" , iStatus.Int());
+
+    // if error occured, inform observers
+    if (KErrNone != iStatus.Int())
+        {
+        for (TInt i(0); i < iObservers.Count(); ++i)
+            {
+            iObservers[i]->BusActivityErrorL(iStatus.Int());
+            }
+        }
+
+    // re-issue request first
+    iBusActivity.Subscribe(iStatus);
+    SetActive();
+
+    // then process property change
+    TBusActivity state(BusActivity());
+
+    switch (state)
+        {
+        case EBusIdle:
+            {
+            LOG("BusIdle");
+
+            for (TInt i(0); i < iObservers.Count(); ++i)
+                {
+                iObservers[i]->BusIdleL();
+                }
+            break;
+            }
+
+        case EBusActive:
+            {
+            LOG("BusActive");
+
+            for (TInt i(0); i < iObservers.Count(); ++i)
+                {
+                iObservers[i]->BusActiveL();
+                }
+            break;
+            }
+
+        default:
+            {
+            LOG("WrongBusState" );
+            PANIC( EWrongBusState);
+            }
+        }
+
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void CUsbBusActivityObserver::DoCancel()
+    {
+    iBusActivity.Cancel();
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TInt CUsbBusActivityObserver::RunError(TInt aError)
+    {
+    LOG_FUNC
+
+    LOG1( "aError = %d", aError );
+
+    // try to continue	
+    return KErrNone;
+
+    }
+