Class GCRewriteCache

This class has not be completely tested.

Since a garbage collectable object is not reclaimed by the collector whenever there exists a reference to it, using the class RewriteCache may create problems since objects are not reclaimed if it is referenced by the cache. The template class GCRewriteCache solves this problem by using weak pointers in its internal implementation.

The template class GCRewriteCache<T> expects T to be a class derived from GCObject. This class implements the following functions:

   GCRewriteCache();
   GCRewriteCache(int capacity);
  ~GCRewriteCache();

   void clear();                   // after rewriting
   void initialize();              // before rewriting
   void initialize(int capacity);  // before rewriting/also set capacity

   int capacity() const;

   void set_state(T * t, int s);
   int get_state(T * t) const;

   void invalidate(T * t);

The usage of these functions are identical to that of class RewriteCache.