# Quentin Garnier 2007-07-14:
> On Fri, Jul 21, 2006 at 02:15:42PM +0200, Jachym Holecek wrote:
> > 	deviter_t 		di;
> > 	device_t 		dv;
> > 
> > 	di = device_iterator_alloc();
> > 	if (di == NULL)
> > 		panic("borked");
> > 
> > 	device_iterator_init(di, TAILQ_FIRST(&alldevs),
> > 	    DIF_PREORDER | DIF_WAITOK);
> > 
> > 	while ((dv = device_iterator_foreach(di)) != NULL)
> > 		printf("FOO %s\n", device_xname(dv));
> > 
> > 	device_iterator_init(di, TAILQ_FIRST(&alldevs),
> > 	    DIF_POSTORDER | DIF_WAITOK);
> > 
> > 	while ((dv = device_iterator_foreach(di)) != NULL)
> > 		printf("BAR %s\n", device_xname(dv));
> > 
> > 	device_iterator_free(di);
> 
> Why didn't this hit the tree?

I got sidetracked and never came up with an user of the API, so I thought
I'd wait for actual need. Do you have some application in mind? Maybe
Jared's power management code would find it handy?

> I have one comment about the example above: you need a slightly different
> API if you want to go through all devices.  The first device in alldevs
> might not be the parent of all devices, because there can be several root
> devices.

True, I can revisit the API over the weekend.

	-- Jachym