[armedbear-devel] threads, join, clos

[Erik Huelsmann]

Hi David,

On Sat, Apr 24, 2010 at 10:58 PM, David Kirkman <dkirkman at ucsd.edu> wrote:
> On Sat, Apr 24, 2010 at 1:57 AM, Erik Huelsmann <ehuels at gmail.com> wrote:
>>
>> I have one question regarding the patch though: How would the caller
>> know the difference between the scenario where an Interrupted
>> exception occurs and the one where the thread is really joined?
>>
>> Should we use the return value NIL to signal "not joined" and T for "joined"?
>
> Yes!  Here is an updated patch that does that.
>
> The other option for thread-join return values is to have
> it return the value of the function used in make-thread.
> That way thread-join will both wait for the thread to finish
> and collect it's value, and I don't have to set up global
> variables to collect the results.  (Which is the way I always
> *want* join to work!)
>
> I've included a second patch in which implements join that way.  It
> also returns a second T/NIL value indicating if the thread finished
> normally or was interrupted.  The only disadvantage to this is that
> in other languages join either returns nothing or a
> success/failure code.

Thanks for your contribution! I committed the second variant in r12634.

I'll look at the threading issues you've raised in the other thread
tomorrow. Bedtime now.

Bye,

Erik.