SegmentStore.h

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/*  Copyright (C) 2003-2021 Free Electron Organization
    Any use of this software requires a license.  If a valid license
    was not distributed with this file, visit freeelectron.org. */

/** @file */

#ifndef __data_SegmentStore_h__
#define __data_SegmentStore_h__

namespace fe
{

/** @brief Memory manager for state blocks.

    @ingroup data
    */
class FE_DL_EXPORT SegmentStore : public StoreI, public ClassSafe<GlobalHolder>
{
    public:
                        SegmentStore(void);
virtual                 ~SegmentStore(void);
virtual void            *createSB(void);
virtual void            *createSB(FE_UWORD count);
virtual hp<LayoutSB>&   getLayout(void);
virtual void            setLayout(sp<LayoutSB>& rspLayout);
virtual FE_UWORD            skipSizeSB(void);

                        /// Get the long name of this Store
        const String    verboseName(void) const;

    private:
        friend class LayoutSB;
virtual void            acquireSB(void *stateBlock);
virtual void            releaseSB(const RecordSB &r_old);
virtual void            freeSB(void *stateBlock);

    private:
        void            initSB(void *stateBlock);
        void            clear(void);
        void*           stateBlockOf(U32 index,void* pSegment);
        FE_UWORD            stateBlockBytes(void);
        FE_UWORD            segmentBytes(U32 count);
        bool            queryRC(void *sb, I32 *&pCount);

        class FreeHeader
        {
            public:
                FreeHeader      *m_pNext;
        };
        class Segment
        {
            public:
                FE_UWORD            m_allocated;
                FE_UWORD            m_used;
                Segment         *m_pNext;
        };

        hp<LayoutSB>            m_hpLayout;
        Segment                 *m_pSegment;
        FreeHeader              *m_pFreeList;
        //Accessor<I32>         m_aRC;
        TypeInfo                m_i32TypeInfo;
        FE_UWORD                    m_i32Index;
        FE_UWORD                    m_cntIndex;
};

inline const String SegmentStore::verboseName(void) const
{
    return "SegmentStore " + name();
}


} /* namespace */

#endif /* __data_SegmentStore_h__ */