STABLE_FLAGS_MALLOC
if (tmp != NULL && tmp->flags & STABLE_FLAGS_MALLOC)
rv->flags = tmp->flags | STABLE_FLAGS_MALLOC;
rv->flags = STABLE_FLAGS_MALLOC;
tmp->flags = STABLE_FLAGS_MALLOC | flags;
if (tbl->flags & STABLE_FLAGS_MALLOC)
#define STABLE_FLAGS_CLEAR STABLE_FLAGS_MALLOC