// Copyright (c) 1999-2009 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:

// A revised version of the CRegisteredParserDll class.  This no longer uses a 

// reference to a CParserRegistrationData object.  Instead a UidType is passed in 

// the  constructor, or through a set method.  The class is used to find the file 

// which contains a parser, to load and maintain a reference count of the number of 

// objects using the dll, so that it can be unloaded when no longer required. 

// It will also unload the dll when a new parser is required.

// 

//

#ifndef __REGPSDLL_H__

#define __REGPSDLL_H__

#include <e32base.h>

// forward declarations

class RWriteStream;

class RReadStream;

class RFs;

//

//  Real non-derivable class

//

class CRegisteredParserDll : public CTimer

/** Finds, loads and maintains a reference count of client processes for a BIO 

parser DLL.

When the reference count falls to 0, the class is also responsible for unloading 

the DLL. The public interface for this class is used only by CBIOServerMtm. 

@publishedAll

@released

*/

	{

public:

    IMPORT_C static CRegisteredParserDll* NewL(TDesC& aParserName);

    IMPORT_C ~CRegisteredParserDll();

	IMPORT_C TInt GetLibrary(RFs& aFs,RLibrary& aDllLibrary);   // Increments reference count if successful or returns error 

	IMPORT_C void ReleaseLibrary();                                   // Decrements access count

	                                                                  // Should be called from destructor of any objects created from the library 

private:

	CRegisteredParserDll(const TDesC& aParserName);

    void ConstructL();

	void LoadLibraryL(RFs& aFs);   

	TInt FindFullName(RFs& aFs,TDes& aFullName); 

private:

	TUidType iUidType;

    TPtrC iParserName;

	RLibrary iParserDllLibrary;

	TInt iDllRefCount;

    void RunL();

    enum { KReleaseLibraryTimeout = 30000000 };

	};

#endif