How to use XSUBs from another module?

Question

I am writing XS module. And want to reuse functions from another XS in Sub::Indentify.

In case of usual perl module I can do:

use Sub::Identify;
Sub::Identify::get_code_info( $code );

How do same thing from XS?

UPD
I want to call get_code_info as C function not as perl subroutine