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C:/temp/src/j2k/DataType/Parenth.Frd/Link.cpp

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// Link.cpp - Single-Link Class Implementation
#include "Link.hpp"

// This creates space for the freelist variable
Link* Link::freelist = NULL;

    Link::Link() {
         next = NULL;
   }

    Link::Link( Link& link ) {                // Copy Constructor
        element = new DBase( *link.element );
        next = NULL;  
   }

    Link::Link(Link* nextp ) {                // Default Empty Constructor
        next = nextp;  
   }

    Link::Link(DBase* Elemval) {              // With an element and no ptr
        element = Elemval;  
        next = NULL;
   }

    Link::Link(DBase* Elemval, Link* nextp) { // With an element and next ptr
        element = Elemval;  
        next = nextp;  
   }

// Redefine NEW and DELETE so we use a FreeList if possible...
void* Link::operator new(size_t) {          // Overload new
  if (freelist == NULL)                  // Create new space
    return ::new Link; 

  Link* temp = freelist;                  // Otherwise, get from freelist
  freelist = freelist->next;
  return temp;                        // Return the link node
}

void Link::operator delete(void* ptr) {        // Overload delete
  ((Link*)ptr)->next = freelist;         // Put on freelist
  freelist = (Link*)ptr;
}

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