freebsd man page for devclass_get_maxunit

DEVCLASS_GET_MAXUNIT(9) 				   BSD Kernel Developer's Manual				   DEVCLASS_GET_MAXUNIT(9)

NAME
     devclass_get_maxunit -- find the maximum unit number in the class

SYNOPSIS
     #include <sys/param.h>
     #include <sys/bus.h>

     int
     devclass_get_maxunit(devclass_t dc);

DESCRIPTION
     Returns the next unit number to be allocated to device instances in the devclass.	This is one greater than the highest currently allocated
     unit.

RETURN VALUES
     The devclass_get_maxunit() function returns -1 if dc is NULL, otherwise it returns the next unit number in dc's devclass.

ERRORS
     None.

SEE ALSO
     devclass(9), device(9)

AUTHORS
     This manual page was written by Doug Rabson.

BUGS
     The name is confusing since it is one greater than the maximum unit.

BSD
								September 10, 2010							       BSD