1 files changed, 58 insertions, 0 deletions
diff --git a/Database/internals/database-references.h b/Database/internals/database-references.h
new file mode 100644
index 0000000..65e4cdf
--- /dev/null
+++ b/Database/internals/database-references.h
@@ -0,0 +1,58 @@
+#ifndef __DATABASE_REFERENCES_H__
+#define __DATABASE_REFERENCES_H__
+
+class SegmentData;
+class RefFrom;
+class RefTo;
+
+/** 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() { return refTo->getSegRefData(); }
+    SegmentRefData * getSegRefData() { return data; }
+    RefFrom * getNext() { return next; }
+  private:
+    RefTo * refTo;
+    RefFrom * next, * prev;
+    SegmentRefData * data;
+};
+
+class RefTo : public Base {
+  public:
+      RefTo(Uint32 ptr, SegmentRefData * data);
+      ~RefTo();
+    SegmentRefData * getRefSegData() { return refFrom->getSegRefData(); }
+    SegmentRefData * getSegRefData() { return data; }
+  private:
+    RefFrom * refFrom;
+    SegmentRefData * data;
+};
+
+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