From: Thorsten Scheuermann <TScheuermann@...>
Date: 2002-06-10T23:17:22+09:00
Subject: RE: multiple instances of Ruby interpreter in my C++ code?

Well, the threading in the app is cooperative, not preemptive. So if there
was a way to spawn each script in a Ruby thread, and switch to a specific
thread through a C or Ruby call I think I could do it.

Then I could basically do this:

while(!done)
{
   switch to my ruby thread
   for(a while)
      run a line of ruby code
   yield()
}

-----Original Message-----
From: Sean Middleditch [mailto:elanthis@awesomeplay.com]
Sent: Monday, June 10, 2002 10:11 AM
To: ruby-talk@ruby-lang.org
Subject: RE: multiple instances of Ruby interpreter in my C++ code?


Ew, the threading will be a problem.  As mad as some people on the list
may get at me for saying so, in the interest of "the best tool for the
job," Ruby may not be your best bet if your app requires the
multi-threading.

On the other hand, Ruby itself has great threading support - you may
wish to have your app run in a single OS thread, and let the Ruby
scripts be multi-threaded?

Otherwise, of the languages I know, Lua would probably work best for
you. 

On Mon, 2002-06-10 at 10:05, Thorsten Scheuermann wrote:
> I wanted to use it in a module for an application to run (currently) very
> simple scripts. The thing is that the app is multithreaded and several
> instances of this module could run concurrently executing different
scripts.
> The scripts right now just look like this:
> 
> doSomething(x)
> doSomethingElse(A_CONSTANT)
> ...
> 
> They are automatically generated but eventually I will write new ones by
> hand and that's where the flexibility of Ruby would come in handy. the
calls
> that are made in the scripts end up calling wrapped C/C++ functions.
> If I have something like
> script1: x = foo()
> script2: x = bar()
> I don't want the scripts to actually share the variable x. They should be
> visible only in the scope of the particular script. Maybe there's a way of
> wrapping these scripts inside a Ruby module through a preprocessor so that
> they are isolated from each other?
> 
> -Thorsten
> 
> -----Original Message-----
> From: Sean Middleditch [mailto:elanthis@awesomeplay.com]
> Sent: Monday, June 10, 2002 9:49 AM
> To: ruby-talk@ruby-lang.org
> Subject: Re: multiple instances of Ruby interpreter in my C++ code?
> 
> 
> Ruby makes use of a lot of global values - there is no way of doing this
> in Ruby currently.
> 
> What reason do you have for wanting multiple instances?  There may be
> another way of accomplishing your goal(s).
> 
> On Mon, 2002-06-10 at 09:42, Thorsten Scheuermann wrote:
> > Hi,
> > 
> > I'm new to Ruby and am currently trying to embed Ruby in a C++ program.
It
> > is pretty straightforward and I've already had some success with that.
> > However, what I really want is to have several independent instances of
> the
> > interpreter running. Lua for example makes this easy by encapsulating
the
> > interpreter state in a C struct, but I didn't see that facility in Ruby.
> Is
> > there any way to accomplish this?
> > 
> > -Thorsten Scheuermann
> 
>