On Tuesday 15 March 2005 17:14, Greg KH wrote: > > Ease-of-use, maybe. However, it also means > > ease-of-getting-reference-counting-wrong. And reference counting trumps it > > all :) > > It will not make the reference counting logic easier to get wrong, or > easier to get right. �It totally takes it away from the user, and makes > them implement it themselves if they so wish (like the USB HCD patch > does.)
Exactly, _IF_ they wish. And as practice shows proper reference counting is not the very first thing people are concerned about. I see the the new class interface useful in the following scenario: - We have a proper subsystem that already does proper refcounting and one might not want to consolidate core reference counting with subsystems as it is too invasive. If you consider the following scenario I do not think we want to encourage it: - We have "bad" system and user says "ah, I'll just use the new model so I don't have to think about lifetime rules at the moment, I don't have time/have something more interesting to do/I'll do that later when I have time". There is a third scenario: - We have a completely new system or a system undergoing overhaul: the coder tries to do it right and does consider all lifetime rules and makes sure that all objects are properly accounted for. In this case old interface is much more clear and easier to use than the new one. I also not quite sure why a bus with its devices and drivers can be implemented correctly (I believe we have a bunch of them now - PCI, USB, serio, gameport) but class interface cannot be tamed? -- Dmitry ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95&alloc_id396&op=click _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
