MariaDB [hello]> show create table a;
+-------+----------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table                                                                                                                           |
+-------+----------------------------------------------------------------------------------------------------------------------------------------+
| a     | CREATE TABLE `a` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  UNIQUE KEY `id` (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1 |
+-------+----------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

MariaDB [hello]> lock table a write;
Query OK, 0 rows affected (0.00 sec)

MariaDB [hello]> 
[2]+  Stopped                 mysql
[root@galera1 my.cnf.d]# fg 1
mysql

MariaDB [hello]> insert into a values(null);




^Z
[1]+  Stopped                 mysql
[root@galera1 my.cnf.d]# fg 2
mysql

MariaDB [hello]> unlock tables;
Query OK, 0 rows affected (0.00 sec)

MariaDB [hello]> show global status like 'table_lock%';
+-----------------------+-------+
| Variable_name         | Value |
+-----------------------+-------+
| Table_locks_immediate | 26    |
| Table_locks_waited    | 0     |
+-----------------------+-------+
2 rows in set (0.00 sec)

MariaDB [hello]> 

mysql  Ver 15.1 Distrib 10.1.7-MariaDB, for Linux (x86_64) using readline 5.1