105 

   105 

   106   NOT_PRODUCT(int _sync_point_count;)

   106   NOT_PRODUCT(int _sync_point_count;)

   107   NOT_PRODUCT(int _merge_count;)

   107   NOT_PRODUCT(int _merge_count;)

   108   NOT_PRODUCT(int _last_gen_in_use;)

   108   NOT_PRODUCT(int _last_gen_in_use;)

   109 

   109 

   110   inline int generations_in_use() const {

   111   inline int generations_in_use() const {

   111     return (_tail >= _head ? (_tail - _head + 1) : (MAX_GENERATIONS - (_head - _tail) + 1));

   112     return (_tail >= _head ? (_tail - _head + 1) : (MAX_GENERATIONS - (_head - _tail) + 1));

   112   }

   113   }

   113 };

   114 };

   114 

   115