BIO_CB_FREE
case BIO_CB_FREE:
ret = (int)bio_call_callback(a, BIO_CB_FREE, NULL, 0, 0, 0L, 1L, NULL);
if (oper == BIO_CB_FREE)
|| !TEST_int_eq(my_param_oper[0], BIO_CB_FREE)
|| !TEST_int_eq(my_param_oper[0], BIO_CB_FREE)