On Wed, 2014-11-05 at 09:16 +0000, Luís Oliveira wrote: > On Wed, Nov 5, 2014 at 7:53 AM, FAU <f...@riseup.net> wrote: > > Is there a reliable/portable way to have lambdas called as a callback > > from a foreign C function? I assume there's not though. > > SBCL has an ALIEN-LAMBDA but, last time I checked, most Lisps don't > have a similar feature. > > > > I could imagine it could be simulated (by a dispatcher callback or > > something) so I'm wondering if somebody has done something like that > > before and may share insight into her/his design. > > I know one of the GTK bindings did something like this, but it used > some GTK-specific tricks. IIRC, callbacks were somehow associated > with specific GTK objects, and so you could dispatch on those. > > If you know the callback will be invoked within your foreign function > call, a special variable might do the trick, but you'd have to define > callbacks a priori for each and every combination of argument types. > > I think you might be able to do this using libffi's closure API, > though. (See cffi-libffi for inspiration on how to use libffi.) Do you > feel like giving that a go?
Thanks for all the details. I'll have a look at this. _______________________________________________ Cffi-devel mailing list Cffi-devel@common-lisp.net http://mailman.common-lisp.net/cgi-bin/mailman/listinfo/cffi-devel
