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Commit Graph

7 Commits

Author SHA1 Message Date
Poul-Henning Kamp
93f6c81e25 Remove debugging printfs. 2005-03-14 06:51:29 +00:00
Poul-Henning Kamp
d9a54d5c23 Reengineer subr_unit
Add support for passing in a mutex.  If NULL is passed a global
	subr_unit mutex is used.

	Add alloc_unrl() which expects the mutex to be held.

	Allocating a unit will never sleep as it does not need to allocate
	memory.

	Cut possible range in half so we can use -1 to mean "out of number".

	Collapse first and last runs into the head by means of counters.
	This saves memory in the common case(s).
2005-03-08 10:40:48 +00:00
Poul-Henning Kamp
3b3f38ed7d Add placeholder mutex argument to new_unrhdr(). 2005-03-07 11:05:47 +00:00
Warner Losh
9454b2d864 /* -> /*- for copyright notices, minor format tweaks as necessary 2005-01-06 23:35:40 +00:00
Poul-Henning Kamp
e4fea39e9e Add delete_unrhdr() function.
It will fail fatally if all allocated numbers have not been returned first.
2004-10-25 12:27:03 +00:00
John Baldwin
4a2aa5d054 Fix a typo to fix the !DIAGNOSTIC build.
Submitted by:	many
2004-09-30 18:13:18 +00:00
Poul-Henning Kamp
f6bde1fd05 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.
2004-09-30 07:04:03 +00:00