K 10
svn:author
V 3
phk
K 8
svn:date
V 27
2004-09-30T07:04:03.000000Z
K 7
svn:log
V 568
Add a new API for allocating unit number (-like) resources.

Allocation is always lowest free unit number.

A mixed range/bitmap strategy for maximum memory efficiency.  In
the typical case where no unit numbers are freed total memory usage
is 56 bytes on i386.

malloc is called M_WAITOK but no locking is provided (yet).  A bit of
experience will be necessary to determine the best strategy.  Hopefully
a "caller provides locking" strategy can be maintained, but that may
require use of M_NOWAIT allocation and failure handling.

A userland test driver is included.

END