+ :accessor gf-dfun-state)
+ ;; Used to make DFUN-STATE & FIN-FUNCTION updates atomic.
+ (%lock
+ :initform (sb-thread::make-spinlock :name "GF lock")
+ :reader gf-lock)
+ ;; Set to true by ADD-METHOD, REMOVE-METHOD; to false by
+ ;; MAYBE-UPDATE-INFO-FOR-GF.
+ (info-needs-update
+ :initform nil
+ :accessor gf-info-needs-update))