/*

* Copyright (c) 2005 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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 class to help track memory leaks.

*

*/

#ifndef LEAK_TRACKER_H

#define LEAK_TRACKER_H

// Helper macros

#if defined(__WINSCW__)

//#define TRACK_LEAKS

#endif

// INCLUDES

#include <e32base.h>

// CONSTANTS

// MACROS

// DATA TYPES

struct LeakTracker_Value

    {

    TInt    valueId;

    TInt32  value;

    };

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// CLASS DECLARATION

/**

*  A class to help track memory leaks.

*

*  \b Library: FeedsEngine.lib

*

*  @since 3.0

*/

class CLeakTracker: public CBase

    {

    public:  // Types

        enum TInstType

            {

            ENone                       = 0,

            EAbstractValueHolder        = 1,

            EEditFeedDialog             = 2,

            EEditFolderDialog           = 3,

            EFeed                       = 4,

            EFeedContainer              = 5,

            EFeedHandler                = 6,

            EFeedParser                 = 7,

            EFeedsApplication           = 8,

            EFeedsAppUi                 = 9,

            EFeedsDocument              = 10,

            EFeedView                   = 11,

            EFileHandler                = 12,

            EFolderContainer            = 13,

            EFolderItem                 = 14,

            EFolderView                 = 15,

            EUpdateFeedTask             = 16,

            EImportFolderTask           = 17,

            EHttpConnection             = 18,

            EHttpHandler                = 19,

            EItem                       = 20,

            EItemIter                   = 21,

            ELibXml2                    = 22,

            ERichTextEditor             = 23,

            EOpmlParser                 = 24,

            EUpdateFolderViewTask       = 25,

            ERssFeedParser              = 26,

            ESettingsContainer          = 27,

            ESettingsView               = 28,

            ESingletons                 = 29,

            ETestHarness                = 30,

            ETopicContainer             = 31,

            ETopicView                  = 32,

            EUpdateTopicViewTask        = 33,

            EWaitDialog                 = 34,

            EXmlEncoding                = 35,

            EXmlEntity                  = 36,

            ETestHarnessContainer       = 37,

            ETestHarnessView            = 38,

            EFeedsServer                = 39,

            EFeedsDatabase              = 40,

            EAtomFeedParser             = 41,

            EUpdateAllFeedsTask         = 42,

            EFeedsServerSession         = 43,

            EBackgroundUpdater          = 44,

            EPackedFeed                 = 45,

            EPackedFolder               = 46,

            EFeedsViewMgr               = 47,

            EFeedsServerClient          = 48,

            EClientRequestHandler       = 49,

            EFeedsServerFeed            = 50,

            EFeedRequestHandler         = 51,

            EFeedsSeverFolderItem       = 52,

            EFolderItemRequestHandler   = 53,

            EEnclosure                  = 54,

            EMiniItem                   = 55

            };

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        */

        static CLeakTracker* NewL(const TDesC& aSource);

        /**

        * Destructor.

        */        

        virtual ~CLeakTracker();

    public: // New methods

        /**

        * Increments the ref-count on the given class type

        *

        * @since 3.0

        * @param aType The class type to be incremented.

        * @return Void

        */

        void Increment(TInstType aType);

        /**

        * Decrements the ref-count on the given class type

        *

        * @since 3.0

        * @param aType The class type to be decremented.

        * @return Void

        */

        void Decrement(TInstType aType);

    private:

        /**

        * C++ default constructor.

        */

        CLeakTracker();

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL(const TDesC& aSource);

    private:  // Data

        RArray<LeakTracker_Value> iValues;

        HBufC*                    iSource;

    };

#ifdef TRACK_LEAKS

extern CLeakTracker*  gLeakTracker;

#define LEAK_TRACKER_INCREMENT(aType) gLeakTracker->Increment(aType)

#define LEAK_TRACKER_DECREMENT(aType) gLeakTracker->Decrement(aType)

#else // !TRACK_LEAKS

#define LEAK_TRACKER_INCREMENT(aType)

#define LEAK_TRACKER_DECREMENT(aType)

#endif

/**

*  A class to help track memory leaks.

*

*  \b Library: FeedsEngine.lib

*

*  @since 3.0

*/

class TLeakTracker

    {

    public:

        /**

        * C++ default constructor.

        */

        inline TLeakTracker(CLeakTracker::TInstType aClassId):

                iClassId(aClassId)

            {

            LEAK_TRACKER_INCREMENT(iClassId);

            }

        /**

        * Destructor.

        */        

        inline ~TLeakTracker()

            {

            LEAK_TRACKER_DECREMENT(iClassId);

            }

    private:

        CLeakTracker::TInstType  iClassId;

    };

#endif      // LEAK_TRACKER_H

// End of File