--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbengines/usbotgwatcher/src/cusbhosteventnotificationobserver.cpp	Fri Jun 04 10:27:39 2010 +0100
@@ -0,0 +1,266 @@
+/*
+ * 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 <usbman.h>
+
+#include "cusbhosteventnotificationobserver.h"
+
+#include "definitions.h"
+#include "debug.h"
+#include "panic.h"
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CUsbHostEventNotificationObserver::CUsbHostEventNotificationObserver(
+        RUsb* aUsb) :
+    CActive(EPriorityStandard), iUsb(aUsb)
+    {
+    CActiveScheduler::Add(this);
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void CUsbHostEventNotificationObserver::ConstructL()
+    {
+    LOG_FUNC
+
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CUsbHostEventNotificationObserver* CUsbHostEventNotificationObserver::NewL(
+        RUsb* aUsb)
+    {
+    LOG_FUNC
+
+    CUsbHostEventNotificationObserver* self =
+            new (ELeave) CUsbHostEventNotificationObserver(aUsb);
+    CleanupStack::PushL(self);
+    self->ConstructL();
+    CleanupStack::Pop(self);
+    return self;
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+CUsbHostEventNotificationObserver::~CUsbHostEventNotificationObserver()
+    {
+    LOG_FUNC
+
+    Cancel();
+
+    iObservers.Close();
+
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void CUsbHostEventNotificationObserver::SubscribeL(
+        MUsbHostEventNotificationObserver& 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
+        {
+        iUsb->HostEventNotification(iStatus, iEventInfo);
+        SetActive();
+
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void CUsbHostEventNotificationObserver::UnsubscribeL(
+        MUsbHostEventNotificationObserver& aObserver)
+    {
+    LOG_FUNC
+
+    TInt i(iObservers.Find(&aObserver));
+    if (KErrNotFound == i)
+        {
+        LOG("Observer not found");
+        PANIC( ECanNotFindHostEventNotificationObserver);
+        return;
+        }
+
+    iObservers.Remove(i);
+
+    if (0 == iObservers.Count()) // no observers anymore
+        {
+        // cancel pending request
+        Cancel();
+        }
+    }
+
+// ---------------------------------------------------------------------------
+//
+// ---------------------------------------------------------------------------
+//
+void CUsbHostEventNotificationObserver::RunL()
+    {
+    LOG_FUNC
+
+    LOG1( "iStatus = %d", iStatus.Int());
+
+    // if error occured, tell to Observers
+    if (KErrNone != iStatus.Int())
+        {
+        for (TInt i(0); i < iObservers.Count(); ++i)
+            {
+            iObservers[i]->HostEventNotificationErrorL(iStatus.Int());
+            }
+        return;
+        }
+
+    TDeviceEventInformation dei(iEventInfo);
+
+    // re-issue request first
+    iUsb->HostEventNotification(iStatus, iEventInfo);
+    SetActive();
+
+    // Log the event
+    LOG1( "iEventInfo.iDeviceId         = %d" , dei.iDeviceId);
+    LOG1( "iEventInfo.iEventType        = %d" , dei.iEventType);
+    LOG1( "iEventInfo.iError            = %d" , dei.iError);
+    LOG1( "iEventInfo.iDriverLoadStatus = %d" , dei.iDriverLoadStatus);
+    LOG1( "iEventInfo.iVid              = %d" , dei.iVid);
+    LOG1( "iEventInfo.iPid              = %d" , dei.iPid);
+
+    // then process property change
+    switch (dei.iEventType)
+        {
+        case EDeviceAttachment:
+            {
+            LOG("DeviceAttachment" );
+
+            for (TInt i(0); i < iObservers.Count(); ++i)
+                {
+                iObservers[i]->DeviceAttachedL(dei);
+                }
+            break;
+            }
+
+        case EDeviceDetachment:
+            {
+            LOG( "DeviceDetachment" );
+
+            for (TInt i(0); i < iObservers.Count(); ++i)
+                {
+                iObservers[i]->DeviceDetachedL(dei);
+                }
+            break;
+            }
+
+        case EDriverLoad:
+            {
+            switch (dei.iDriverLoadStatus)
+                {
+                case EDriverLoadSuccess:
+                    {
+                    LOG( "DriverLoadSuccess" );
+
+                    for (TInt i(0); i < iObservers.Count(); ++i)
+                        {
+                        iObservers[i]->DriverLoadSuccessL(dei);
+                        }
+
+                    break;
+                    }
+                case EDriverLoadPartialSuccess:
+                    {
+                    LOG( "DriverLoadPartialSuccess" );
+
+                    for (TInt i(0); i < iObservers.Count(); ++i)
+                        {
+                        iObservers[i]->DriverLoadPartialSuccessL(dei);
+                        }
+
+                    break;
+                    }
+                case EDriverLoadFailure:
+                    {
+                    LOG( "DriverLoadFailure");
+
+                    for (TInt i(0); i < iObservers.Count(); ++i)
+                        {
+                        iObservers[i]->DriverLoadFailureL(dei);
+                        }
+                    break;
+                    }
+                default:
+                    {
+                    LOG("WrongDriverLoadStatus" );
+                    PANIC( EWrongDriverLoadStatus);
+                    }
+                }
+            break;
+
+            }
+        default:
+            {
+            LOG( "WrongHostEventNotification" );
+            PANIC( EWrongHostEventNotification);
+            }
+        }
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+void CUsbHostEventNotificationObserver::DoCancel()
+    {
+    iUsb->HostEventNotificationCancel();
+    }
+
+// ---------------------------------------------------------------------------
+// 
+// ---------------------------------------------------------------------------
+//
+TInt CUsbHostEventNotificationObserver::RunError(TInt aError)
+    {
+    LOG_FUNC
+
+    LOG1( "aError = %d" , aError);
+
+    // try to recover and continue	
+    return KErrNone;
+
+    }
+