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d8e4fbae62
This is generalization of idea, that was previously usesd for caching resolution of class_entries in zend_type. Now very similar mechanizm is used for general zend_string into zend_class_entry resolution. Interned zend_string with IS_STR_CLASS_NAME_MAP_PTR GC_FLAG uses its refcount to adress corresponding zend_class_entry cache slot. The refcount keeps an offset to this slot from CG(map_ptr_base). Flag may be checked by ZSTR_HAS_CE_CACHE(str), cache slot may be read by ZSTR_GET_CE_CACHE(str) and set by ZSTR_SET_CE_CACHE(str, ce).