On Sep 14, 2007, at 3:24 PM, Gottlob Frege wrote:
By the way, it also looks like boost.function is sensitive to packing/alignment (in particular, the small-object optimizations).
So if I include function into 2 pieces of code and pass functions back and forth, they better have the same alignment!
Well, yes.
(And considering that boost.threads is typically compiled into a separate dll, and uses boost.function, it is not hard to run into the problem).
I was working on a test and/or patch and/or etc to make sure I understand it correctly, but since function was brought up anyhow...
Has this been seen yet? Do you think it is a boost issue, or a client issue? What do you think the best fix is? I think you could re-order the members (largest first), but that would still make arrays of functions suspect. Otherwise, should you be using the boost pre/post alignment headers?
I would typically consider this a client issue, but if a fix such as using Boost's pre/post alignment headers would make life easier for clients, I'll be happy to make the change. Test and patch would be greatly appreciated, of course :) - Doug