debian man page for get_refresh_rate

get_refresh_rate(3alleg4)					  Allegro manual					 get_refresh_rate(3alleg4)

NAME
       get_refresh_rate - Returns the current refresh rate. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       int get_refresh_rate(void);

DESCRIPTION
       Returns	the  current  refresh  rate,  if  known  (not all drivers are able to report this information). Returns zero if the actual rate is
       unknown.

SEE ALSO
       request_refresh_rate(3alleg4)

Allegro 							   version 4.4.2					 get_refresh_rate(3alleg4)