count_all with joint two table

Hi coders.

i create pagination but i found out that there is count_all, and now my problem is, i have no idea how to join two table with count_all. 

code below is i need to convert into count_all so that i need call from here.

PHP Code:

$config['total_rows'] = $this->public_base_model->count_confirmation(); 


PHP Code:

$this->db->select('pull_out.*,users.*');
$this->db->from('pull_out');
$this->db->join('users', 'pull_out.userid = users.userid', 'left');