free_dir          317 dir.c              VALUE obj = Data_Make_Struct(klass, struct dir_data, mark_dir, free_dir, dirp);
free_dir          396 dir.c              VALUE dir = Data_Make_Struct(klass, struct dir_data, mark_dir, free_dir, dp);
free_dir         1696 dir.c          	RDATA(dir)->dfree != (RUBY_DATA_FUNC)free_dir) {