// Copyright (c) 2008-2009 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:

//

/**

 @file

 @internalComponent

*/

#ifndef SGDRIVER_H

#define SGDRIVER_H

#include <e32std.h>

#include <pls.h>

class MSgDriverAdapter;

/**

@internalComponent

This class encapsulates the global data in the Graphics Resource DLL.

*/

NONSHARABLE_CLASS(XSgDriverPls)

	{

public:

	/**

	Default constructor, called when the Graphics Resource DLL is loaded into a

	process. Creates the mutex used to synchronise access to the global data. The

	mutex will be automatically destroyed by the kernel on process termination.

	*/

	XSgDriverPls();

public:

	/**

	Result code of the constructor.

	*/

	TInt iError;

	/**

	Handle to the mutex used to synchronise access to the global data.

	*/

	RMutex iMutex;

#ifdef __WINS__

	/**

	Handle to the Graphics Resource Adapter DLL owned by this process.

	*/

	RLibrary iLibrary;

#endif

	/**

	Number of times SgDriver::Open() has been called from this process without

	a corresponding call to SgDriver::Close().

	*/

	TInt iOpenCount;

	/**

	Pointer to the Graphics Resource Adapter singleton in this process.

	*/

	MSgDriverAdapter* iDriver;

	};

/**

@internalComponent

The UID3 value in the compound identifier of the Graphics Resource DLL.

*/

const TUid KSgResourceLibraryUid = {0x10285A70};

/**

@internalComponent

The global data in the Graphics Resource DLL.

*/

#ifdef __WINS__

#define gPls (*Pls<XSgDriverPls>(KSgResourceLibraryUid))

#else

extern XSgDriverPls gPls;

#endif

#endif // SGDRIVER_H