On Dec 3, 2004, at 9:47 AM, Lionel Thiry wrote:

> Hello!
> I need help:
> 	Is Ruby multithreading cooperative or preemptive?

Preemptive.

> I mean: am I forced to abuse of Thread.pass in (every heavy) threads 
> or may I just assume the ruby interpreter will commute threads itself?

Yes, ruby will handle thread scheduling.

> Another question:
> 	Is Ruby multithreading blocked by system calls?
>
> Like for example when calling system("command line").

Hmm, good question.  I assume yes, but let's let someone who knows 
better than me answer this one...  ;)

James Edward Gray II