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C:/temp/src/j2k/DataType/Link/DLink.hpp

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// DLink.hpp - Class interface for a Link used 
// in a Doubly-Linked list node with freelist 

// Next version will be a Macro where Elem*
// will be the argument for that Macro.

#ifndef __J2K__DLink_HPP__
#define __J2K__DLink_HPP__

#ifndef ZERO
#define ZERO  ( (Elem)0 )
#endif

class DLink {

public:
  inline DLink();

  inline DLink( DLink* nextp );
  inline DLink( DLink* nextp, DLink* prevp );
  
  inline DLink( Elem  Elemval );
  inline DLink( Elem  Elemval, DLink* nextp );
  inline DLink( Elem  Elemval, DLink* nextp, DLink* prevp );

#if 0
  void* operator new(size_t);       // Overloaded new operator
  void  operator delete(void*);     // Overloaded delete operator
#endif

  // N.B. Pointers are manipulated anyway by outside classes,
  //      so there is no point of putting them Private !

  Elem   element;                   // Elem value for this node
  DLink* next;                      // Pointer to next node in list
  DLink* prev;                      // Pointer to previous node
  
  static DLink* freelist;           // DLink class SHARED FreeList
};

#endif

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