Re: [Pharo-project] Alien and callbacks from "foreign" threads?

>
> Hi everybody,
>
> I am close to releasing JNIPort (http://jniport.wikispaces.com) for Pharo
> and Squeak. Almost everything works on both Mac OS X and Windows with one
> exception. I can attach a Java VM to Pharo/Squeak, I can send messages to
> Java objects and get results back, and even callbacks from Java to Smalltalk
> seem to work.
>
> The exception is that a callback from Java to Smalltalk which comes from a
> different thread leads to a crash of the Squeak VM. I have not been able to
> figure out what the problem is. There is a similar problem with a hook of
> the Java VM: one can register a callback function which is called whenever
> the Java VM produces output for stdout/stderr. With Pharo 1.1.1 on Mac OS X,
> using this hook works when the hook contains a "nil halt", and if I simply
> proceed in each of the notifiers. When I remove the halt or replace it by a
> Delay, the image freezes. In Squeak 4.1 on Windows, the behavior is
> different: the VM crashes.
>
> Does Alien support callbacks coming from a "foreign" thread? Or is this a
> limitation of Alien?
>
> Thanks in advance for any help,
> Joachim Geidel
>
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>