/*

* Copyright (c) 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 MEMSPYDRIVERLOGCHANBASE_H

#define MEMSPYDRIVERLOGCHANBASE_H

// System includes

#include <e32cmn.h>

#include <kern_priv.h>

#ifdef __MARM__

#include <arm.h>

#endif

// User includes

#include "MemSpyDriverStreamWriter.h"

// Classes referenced

class DMemSpyDriverDevice;

class DMemSpyDriverXferBuffer;

class DMemSpyDriverOSAdaption;

class DMemSpySuspensionManager;

class DMemSpyDriverLogChanBase : public DBase

	{

public:

	~DMemSpyDriverLogChanBase();

protected: // Internal construction

	DMemSpyDriverLogChanBase( DMemSpyDriverDevice& aDevice, DThread& aThread );

    TInt BaseConstruct( TInt aTransferBufferSize = 0 );

public: // API

    /**

     * Finish construction of the channel object

     */

    virtual TInt Construct();

    /**

     * Request a channel function - this function implementation (in this class)

     * is able to perform general policing, e.g. SID, capability etc.

     *

     * Currently this always returns KErrNone, but none the less, derived classes

     * should call this implementation and handle return value appropriately.

     */

    virtual TInt Request( TInt aFunction, TAny* a1, TAny* a2 );

    /**

     * Sub channel should return ETrue if it can handle the specified function

     * request.

     */

    virtual TBool IsHandler( TInt aFunction ) const = 0;

protected: // Internal access

    DMemSpyDriverDevice& MemSpyDevice();

    DMemSpySuspensionManager& SuspensionManager();

protected: // Internal methods

	TInt OpenTempObject( TUint aId, TObjectType aType, TBool aAllowDeadObjects = EFalse );

	void CloseTempObject();

    DThread& TempObjectAsThread();

    DProcess& TempObjectAsProcess();

protected: // Transfer buffer

    RMemSpyMemStreamWriter OpenXferStream();

    TInt OpenXferStream( RMemSpyMemStreamWriter& aWriter, TInt aRequiredSize );

protected: // Internal access

    DMemSpyDriverOSAdaption& OSAdaption();

    inline DObject* TempObject() { return iTempObj; }

    inline const DObject* TempObject() const { return iTempObj; }

    //

    inline DThread& ClientThread() { return iClientThread; }

private: // Data members

    DMemSpyDriverDevice& iDevice;

	DThread& iClientThread;

	DObject* iTempObj;

    DMemSpyDriverXferBuffer* iXferBuffer;

	};

#endif