sysstatemgmt/systemstatemgr/inc/ssmstateawaresession.h
author Tapani Kanerva <Tapani.Kanerva@nice.fi>
Thu, 11 Nov 2010 14:35:29 +0000
branchRCL_3
changeset 86 79105dd92dc2
parent 0 4e1aa6a622a0
child 76 cb32bcc88bad
permissions -rw-r--r--
Export meaningful default HWRM policy files, to fix Bug 3852
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// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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#ifndef __SSMSTATEAWARESESSION_H__
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#define __SSMSTATEAWARESESSION_H__
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#include <e32base.h>
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#include <domaindefs.h>
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#include <ssm/ssmstate.h>
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class CSsmStateMonitor;
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/**
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Read-only client interface to receive notifications when the
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System State changes.
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CSsmStateAwareSession wraps this class in an active object.
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@see CSsmStateAwareSession 
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@publishedPartner
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@released
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*/
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NONSHARABLE_CLASS(RSsmStateAwareSession)
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	{
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public:
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	IMPORT_C RSsmStateAwareSession();
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	IMPORT_C TInt Connect(TDmDomainId aId);
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	IMPORT_C void Close();
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	IMPORT_C TSsmState State() const;
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	IMPORT_C void RequestStateNotification(TRequestStatus& aStatus);
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	IMPORT_C void RequestStateNotificationCancel();
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	IMPORT_C void AcknowledgeStateNotification(TInt aError);
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	IMPORT_C void AcknowledgeAndRequestStateNotification(TInt aError, TRequestStatus& aStatus);
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private:
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	RSsmStateAwareSession(const RSsmStateAwareSession& aState);
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private:
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	//The main reason for this class is to hide implementation details that might change
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	class RPrivateImpl;
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	RPrivateImpl* iPimpl;
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	};
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/**
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Interface to implement for clients that want to use the @c CSsmStateAwareSession 
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utility class.
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@publishedPartner
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@released
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*/
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class MStateChangeNotificationSubscriber
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    {
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public:
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	/** 
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	@c StateChanged is called when the System State have changed
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	@param aSsmState contains the new System State
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	@see TSsmMainSystemStates
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	*/
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	virtual void StateChanged(TSsmState aSsmState) = 0;
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	};	
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/**
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Utility class for monitoring the System State. Maintains a list of 
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subscribers that share a single active object. When the System State
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changes the subscribers will be notified in the order
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they were added to the list of subscribers.
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@see TSsmMainSystemStates
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@see RSsmStateAwareSession
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@publishedPartner
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@released
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*/
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NONSHARABLE_CLASS(CSsmStateAwareSession) : public CBase
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	{
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public:
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	IMPORT_C static CSsmStateAwareSession* NewL(TDmDomainId aId);
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	IMPORT_C static CSsmStateAwareSession* NewLC(TDmDomainId aId);
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	IMPORT_C ~CSsmStateAwareSession();
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	IMPORT_C TSsmState State() const;
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	IMPORT_C void AddSubscriberL(MStateChangeNotificationSubscriber& aSubscriber);	
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	IMPORT_C void RemoveSubscriber(const MStateChangeNotificationSubscriber& aSubscriber);
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	// for CSsmStateMonitor
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	void NotifySubscribers(TSsmState aNewState);
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private:
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	CSsmStateAwareSession();
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	void ConstructL(TDmDomainId aId);
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private:
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	RPointerArray<MStateChangeNotificationSubscriber> iSubscribers; // Elements of the array are not owned.
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	CSsmStateMonitor* iMonitor;
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	TInt iSpare[4];
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	};
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#endif