package wasmtime

type slab struct {
	list []int
	next int
}

func (s *slab) allocate() int {
	if s.next == len(s.list) {
		s.list = append(s.list, s.next+1)
	}
	ret := s.next
	s.next = s.list[ret]
	return ret
}

func (s *slab) deallocate(slot int) {
	s.list[slot] = s.next
	s.next = slot
}