On 27 Sep 2016, at 05:31, Britt Durbrow <bdurb...@rattlesnakehillsoftworks.com> wrote: > > FWIW, it’s currently an implementation detail that SELs do map into the > global address space in a way that doesn’t collide with anything else; but > technically, they are in their own address space and the system could map > them otherwise in a manner that does have collisions with other stuff.
That’s true. IIRC GNUStep SEL values don’t work the same way as they do with the Apple/NeXT runtime, so this trick wouldn’t work there. > In practice, I don’t think that will ever happen, because a) too much > existing code makes the assumption that a SEL is de-referenceable or > otherwise depends on this implementation detail; and b) we have 64-bit > addressing, so we’re not going to run out of address space such that making > that change would be advantageous. Agreed, it seems unlikely that Apple would change it; not impossible, but quite unlikely. As I say, relying on it means your code won’t straightforwardly port to GNUStep, but most of us don’t care too much about that. Kind regards, Alastair. -- http://alastairs-place.net _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
