diff -r 000000000000 -r c9bc50fca66e usbmgmt/usbmgr/device/classdrivers/acm/classimplementation/ecacm/inc/BreakController.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usbmgmt/usbmgr/device/classdrivers/acm/classimplementation/ecacm/inc/BreakController.h	Tue Feb 02 02:02:59 2010 +0200
@@ -0,0 +1,101 @@
+/*
+* 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:
+*
+*/
+
+#ifndef __BREAKCONTROLLER_H__
+#define __BREAKCONTROLLER_H__
+
+#include <e32base.h>
+ 
+class CCdcAcmClass;
+class MHostPushedChangeObserver;
+
+NONSHARABLE_CLASS(CBreakController) : public CActive
+/**
+ * Break (timed signal) handler
+ *
+ * This class provides a simple active object that manages the timing aspect 
+ * of a break: there is only one of these, that is used to manage both 
+ * client-induced breaks (routed in via the ACM port) and break commands sent 
+ * here from the (USB) Host.
+ *
+ * Note that only one of the device and the host can be 'in charge of' a 
+ * break. If the host, say, is dealing with a timed break, then it is illegal 
+ * for the device to issue a timed break, though the host may override the 
+ * timed break with a new timed break or a locked break. 
+ */
+	{
+public:
+	enum TRequester
+		{
+		ENone,
+		EDevice,
+		EHost,
+		};
+
+	enum TState
+		{
+		EInactive,
+		ETiming,
+		ELocked,
+		ENumStates
+		};
+
+public:
+	static CBreakController* NewL(CCdcAcmClass& aParentAcm);
+	~CBreakController();
+
+public: // API for requesting breaks
+	TInt BreakRequest(TRequester aRequester, 
+		TState aState, 
+		TTimeIntervalMicroSeconds32 aDelay = 0);
+
+private:
+	CBreakController(CCdcAcmClass& aParentAcm);
+	void ConstructL();
+
+private:
+	void StateMachine(TState aBreakState, TTimeIntervalMicroSeconds32 aDelay);
+
+	void Publish(TState aNewState);
+
+	static TBool ScInvalid(CBreakController *aThis, 
+		TTimeIntervalMicroSeconds32 aDelay);
+	static TBool ScInactive(CBreakController *aThis, 
+		TTimeIntervalMicroSeconds32 aDelay);
+	static TBool ScSetTimer(CBreakController *aThis, 
+		TTimeIntervalMicroSeconds32 aDelay);
+	static TBool ScLocked(CBreakController *aThis, 
+		TTimeIntervalMicroSeconds32 aDelay);
+
+private: // from CActive
+	void RunL();
+	void DoCancel();
+
+private: // owned
+	typedef TBool ( *PBFNT ) (CBreakController *aThis, 
+		TTimeIntervalMicroSeconds32 aDelay);
+	PBFNT StateDispatcher[ENumStates][ENumStates];
+	RTimer iTimer;
+	TState iBreakState;
+	// Whoever's in charge of the current break.
+	TRequester iRequester;
+
+private: // unowned
+	CCdcAcmClass&	  iParentAcm;	///< use to tell (USB) Host about changes
+	};
+
+#endif // __BREAKCONTROLLER_H__