/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbCore module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this file.

** Please review the following information to ensure the GNU Lesser General

** Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#ifndef HBSHAREDMEMORYMANAGER_P_H

#define HBSHAREDMEMORYMANAGER_P_H

#if !defined(HB_BOOTSTRAPPED) || defined(HB_BIN_CSS)

#include "hbmemorymanager_p.h"

#include "hbthemecommon_p.h"

#ifdef HB_THEME_SERVER_MEMORY_REPORT

#include <QMap>

#include <QPair>

#endif

#endif // HB_BOOTSTRAPPED

// 13 MB cache size

#define CACHE_SIZE 1024*1024*13

#if !defined(HB_BOOTSTRAPPED) || defined(HB_BIN_CSS)

class QSharedMemory;

class HbSharedMemoryAllocator;

class HbSharedCache;

class HB_CORE_PRIVATE_EXPORT HbSharedMemoryManager

    : public HbMemoryManager

{

public:

    int alloc( int size );

    int realloc( int oldOffset,int newSize );

    void free( int offset );

    void *base();

    bool isWritable()

    {

        return writable;

    }

    static HbMemoryManager *instance();

    static void releaseInstance();

    int size();

    HbSharedCache *createSharedCache(

        const char *offsetMapData, int size, int offsetItemCount, int sharedCacheOffset = -1);

    HbSharedCache *cache();

    int freeSharedMemory();

    int allocatedSharedMemory();

#ifdef HB_THEME_SERVER_MEMORY_REPORT

    void createReport();

#endif

protected:

    HbSharedMemoryManager();

    ~HbSharedMemoryManager();

private:

    bool initialize();

    int loadMemoryFile(const QString &filePath);

    template<typename T>

    inline T *address(int offset)

    {

        return reinterpret_cast<T *>(static_cast<char *>(base()) + offset);

    }

protected:

    bool writable;

    HbSharedMemoryAllocator *mainAllocator;

    HbSharedMemoryAllocator *subAllocator;

	QSharedMemory *chunk;

private:

    static HbSharedMemoryManager *memManager;

#ifdef HB_THEME_SERVER_MEMORY_REPORT

    int totalAllocated;

    int OOMCount; // how many out of memory exceptions have occurred

    bool OOMReportCreated; // write report in first OOM

    int ordinal; // used in report filename

    QMap<quint32, QPair<quint32, quint32> > allocations; // size, <allocated, freed>

#ifdef HB_THEME_SERVER_FULL_MEMORY_REPORT

    QVector<QPair<quint32, quint32> > fullAllocationHistory;

#endif

#endif

};

#endif // HB_BOOTSTRAPPED

#endif // HBSHAREDMEMORYMANAGER_P_H