source: trunk/src/script/qscriptgc_p.h@ 135

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#ifndef QSCRIPTGC_P_H
#define QSCRIPTGC_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtCore/qglobal.h>

#ifndef QT_NO_SCRIPT

#include <QtCore/QtDebug>
#include <new>

#include "qscriptmemorypool_p.h"

QT_BEGIN_NAMESPACE

namespace QScript {

class GCBlock
{
public:
    GCBlock *next;

    union {
        int generation;
        uint flags;
    };

public:
    inline GCBlock(GCBlock *n):
        next(n), flags(0) {}

    inline void *data()
    { return reinterpret_cast<char *>(this) + sizeof(GCBlock); }

    inline static GCBlock *get(void *ptr)
    {
        char *where = reinterpret_cast<char *>(ptr);
        return reinterpret_cast<GCBlock *>(where - sizeof(GCBlock));
    }
};

template <typename _Tp>
class GCAlloc
{
private:
    int m_new_allocated_blocks;
    int m_free_blocks;
    int m_new_allocated_extra_bytes;
    GCBlock *m_head;
    GCBlock *m_current;
    GCBlock *m_free;
    bool m_blocked_gc;
    bool m_force_gc;
    bool m_sweeping;
    MemoryPool pool;
    _Tp trivial;

public:
    enum { MaxNumberOfBlocks = 1 << 14 };
    enum { MaxNumberOfExtraBytes = 0x800000 };

public: