pub unsafe extern "C" fn OBJ_NAME_new_index(
hash_func: Option<unsafe extern "C" fn(*const i8) -> u64>,
cmp_func: Option<unsafe extern "C" fn(*const i8, *const i8) -> i32>,
free_func: Option<unsafe extern "C" fn(*const i8, i32, *const i8)>,
) -> i32