uniq_memory.hh

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/* -*- C++ -*-
 * $Id: uniq_memory.hh 961 2005-03-11 14:05:33Z fpy $
 */
#ifndef UTILMM_SMART_UNIQ_MEMORY_HEADER
# define UTILMM_SMART_UNIQ_MEMORY_HEADER

#include "utilmm/hash/hash_map.hh"

namespace utilmm {
  namespace smart {
    namespace ref_count {

      template<typename Ty, class Hash>
      struct hash_ptr
        :public std::unary_function<Ty const *, size_t> {
        size_t operator()(Ty const *arg) const;
      }; // struct utilmm::smart::ref_count::hash_ptr<>


      template<typename Ty, class Equal>
      struct eq_ptr
        :public std::binary_function<Ty const *, Ty const *, bool> {
        bool operator()(Ty const *a, Ty const *b) const;
      }; // struct utilmm::smart::ref_count::eq_ptr<>

      template<typename Ty, class Hash, class Equal>
      class uniq_memory {
      public:
        typedef Ty const base_type;
        
      private:
        typedef hash_map< base_type *, size_t, hash_ptr<Ty, Hash>,
                          eq_ptr<Ty, Equal> > mem_type;

        mem_type the_mem;
        
      public:
        typedef typename mem_type::iterator mem_cell;

        mem_cell null_cell() {
          return the_mem.end();
        }

        mem_cell create(base_type *ptr);

        void destroy(mem_cell c);
      }; // class utilmm::smart::ref_count::uniq_memory<>

    } // namespace utilmm::smart::ref_count
  } // namespace utilmm::smart
} // namespace utilmm

# define IN_UTILMM_SMART_UNIQ_MEMORY_HEADER
#include "utilmm/smart/bits/uniq_memory.tcc"
# undef IN_UTILMM_SMART_UNIQ_MEMORY_HEADER
#endif // UTILMM_SMART_UNIQ_MEMORY_HEADER