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.\"
.Dd September 10, 2010
.Dt DEVCLASS_GET_MAXUNIT 9
.Os
.Sh NAME
.Nm devclass_get_maxunit
.Nd find the maximum unit number in the class
.Sh SYNOPSIS
.In sys/param.h
.In sys/bus.h
.Ft int
.Fn devclass_get_maxunit "devclass_t dc"
.Sh DESCRIPTION
Returns the next unit number to be allocated to device instances in the
.Dv devclass .
This is one greater than the highest currently allocated unit.
.Sh RETURN VALUES
The
.Fn devclass_get_maxunit
function returns -1 if
.Fa dc
is
.Dv NULL ,
otherwise it returns the next unit
number in
.Fa dc's
devclass.
.Sh ERRORS
None.
.Sh SEE ALSO
.Xr devclass 9 ,
.Xr device 9
.Sh AUTHORS
This manual page was written by
.An Doug Rabson .
.Sh BUGS
The name is confusing since it is one greater than the maximum unit.