[vlc-devel] [RFC] Regarding the use of *_Control()
pdherbemont at free.fr
Mon Apr 14 16:28:07 CEST 2008
On Apr 14, 2008, at 3:20 PM, Rémi Denis-Courmont wrote:
> Le lundi 14 avril 2008, Pierre d'Herbemont a écrit :
>> I do understand that to do subclassing, and to add new functionality
>> to Control() function without breaking the ABI is quite easy.
>> I do doubt that this is a nice habit, and having internal function
>> pointers would have been much cleaner IMO. (no need to switch(), it's
>> easy to see if a function is supported or not, etc.)
> You cannot add _any_ new callback without breaking the ABI though. So
> the "cleaner" solution is simply impractical, I think.
Well, of course, that's the main advantage of *_Control(). But given
that we nearly never add callbacks, the ABI would rarely change.
An other possibility is to maintain a separate private structure for
the callback. Hence adding a callback won't break the ABI. That would
(I don't plan to change that for now. Just privatize the *_Control()
function and replace call to it by an accessor as described in first
Thanks for the answer,
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