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#ifndef __DATABASE_REFERENCES_H__
#define __DATABASE_REFERENCES_H__
#include "database-segment.h"
class RefTo;
class Database;
/** The reference system, where the database will be able to hold references from and to memory pointers.
*/
class RefFrom : public Base {
public:
RefFrom(RefTo * refTo, SegmentRefData * data);
~RefFrom();
SegmentRefData * getRefSegData();
SegmentRefData * getSegRefData() { return data; }
RefFrom * getNext() { return next; }
private:
RefTo * refTo;
RefFrom * next, * prev;
SegmentRefData * data;
};
class RefTo : public Base {
public:
RefTo(absolute_ptr ptr, SegmentRefData * data, Database *);
~RefTo();
SegmentRefData * getRefSegData();
SegmentRefData * getSegRefData() { return data; }
private:
RefFrom * refFrom;
SegmentRefData * data;
};
inline SegmentRefData * RefFrom::getRefSegData() { return refTo->getSegRefData(); }
inline SegmentRefData * RefTo::getRefSegData() { return refFrom->getSegRefData(); }
class SegmentRefData : public Base {
public:
SegmentRefData(Uint32 ptr, Segment * seg);
~SegmentRefData();
Uint32 getPtr() { return ptr; }
Segment * getSegment() { return seg; }
SegmentRefData * getSegmentRefData(Uint32 ptr) { return seg->getSegmentRefData(ptr); }
RefTo * getRefTo() { return refTo; }
RefFrom * getRefFrom() { return firstRefFrom; }
void setRefTo(RefTo * newRefTo) { refTo = newRefTo; checkDestroy(); }
void setFirstRefFrom(RefFrom * newFirstRefFrom) { firstRefFrom = newFirstRefFrom; checkDestroy(); }
private:
RefTo * refTo;
RefFrom * firstRefFrom;
Uint32 ptr;
Segment * seg;
void checkDestroy() { if (!refTo && !firstRefFrom) delete this; }
};
#endif
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