On Sun, Jul 26, 2009 at 12:37 PM, Philipp Tessenow <
philipp.tessenow at student.hpi.uni-potsdam.de> wrote:

> Hello Kiran,
>
> as far as I know the Alien FFI supports callbacks
> (http://wiki.squeak.org/squeak/6100).
> It looks pretty cool, but the wiki page says it supports Mac only,


That's incorrect.  Alien supports x86 only.


> so if
> you want callbacks in Unix or Windows you may go another way:
>
> Fork a new process that waits on a registered semaphore ('semaIndex :=
> Smalltalk registerExternalObject: (example_semaphore).').
> Then write a Squeak plugin that implements the callback you need. Every
> time your callback is called, signal the registered semaphore
> ('interpreterProxy->signalSemaphoreWithIndex(semaIndex)') so your Squeak
> process can do whatever it needs to do.
>
> See http://www.hpi.uni-potsdam.de/hirschfeld/projects/phidgetlab/ for an
> example of the second way.
>
> I hope that helps ;)
>
> Best regards,
>  Philipp
>
>
> KiranMutt schrieb:
> > Hello:
> >
> > I am working at interfacing an external C library ( static/dynamic ), in
> > that context wanted to know,
> > whether  Squeak supports callbacks and any examples on using the same is
> > highly appreciated.
> >
> > Thanks & Regards
> > Kiran
> >
>
>
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