The CEEVUHFR CWI returns storage to the heap identified by the heapid. If the returned storage does not belong to the given heap, the result is unpredictable. CEEVUHFR uses the C-style parameter interface.
POINTER heap_token;
POINTER ptr
L R15,CEECAACELV-CEECAA(,R12)
L R15,4068(,R15)
BALR R14,R15