// 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();

 	inline TInt DllRefCount() const;

 	inline TUidType UidType() const;

 	inline void SetUidType(const TUidType& aUidType);

 	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 };

 	};

 #include <regpsdll.inl>

 #endif