objc:free-objc-block

(objc:free-objc-block block)

Frees the storage of a block objc:make-objc-block made and gives up the program's hold on its function; answers nil, and freeing a freed block does nothing. A callee that kept the block holds a copy of its own, so the function stays alive until the last copy is released; the freed objc:objc-block itself signals when it is passed or called. Part of the macOS-only objc package -- the interpreter (java -jar, or the rontolisp native binary), a compiled .class / .jar and a --native executable for macOS on Apple silicon, never a .wasm; on a machine without the runtime it signals an error. See the macOS GUI guide.

MY-APP> (free-objc-block *add*)
NIL
MY-APP> *add*
#<OBJC:OBJC-BLOCK i@?ii freed>