[plt-scheme] Using Scheme_Object * from another thread

I thought Hans Boehms GC was thread safe. Are you sure?

Hans



Adam Wick schreef:

>
> You will see intermittent failures in the 3m variants. I don't know the
> non-3m code nearly as well, but I suspect you will see failures there,
> as well.


>
> In order to do this safely, you'd need to (a) completely block the Scheme
> thread from allocating while your OS thread was running, (b) (most 
> likely)
> force a garbage collection immediately on starting the OS thread and 
> (c) make
> sure your OS thread isn't allocating enough memory such that it'll 
> trigger a
> collection after the collection in (b). I would suspect that enforcing 
> these
> would cost notably more than the savings you'll get from multithreading.
>
>
>
> -Adam
>