Re: [Chicken-users] Multiple concurrent top levels?

[Dan Leslie]

On 8/2/2013 1:54 AM, J Altfas wrote:
> I've used the embedding API to some extent, but I'm not sure about
> "multiple toplevels".  It's unclear what "toplevel" environment(s)
> you're referring to.  There's the C_toplevel and I'm pretty sure
> there's only one of those.  The Scheme toplevel runs after
> CHICKEN_run() is called, and can be stopped and resumed (by
> return-to-host and CHICKEN_continue), but that doesn't say anything
> about multiple, simultaneous, independent Scheme instances.

Yes, multiple, simultaneous and independent Scheme instances.

> Maybe that's not what you're driving at.  What kind of "interaction"
> do you mean, and what would it achieve?  I'm thinking it could be
> difficult to get there directly, but perhaps there are other ways to
> accomplish your goals.  More info about what you have in mind would
> probably be helpful.

Extracting a scheme-object from one Scheme instance and passing it to 
another, for instance.

I've tried doing such things with multiple processes using a mix of 
shared memory objects and pipes, but it was ludicrously cumbersome, 
despite a few eggs I wrote to alleviate the process.

-Dan