Agora_Driver::setThreadLock PHP Method

    public function setThreadLock($message_id, $lock)
    {
        $sql = 'UPDATE ' . $this->_threads_table . ' SET locked = ? WHERE message_id = ? OR message_thread = ?';
        $values = array($lock, $message_id, $message_id);
        return $this->_db->execute($sql, $values);
    }