|Subject:||Re: The equivalent of racket's break-thread in guile?|
|Date:||Mon, 3 Jun 2013 09:37:45 +0800|
Xin Wang <address@hidden> skribis:
Here ‘break-thread’ in the first thread appears to be equivalent to
> 2013/5/31 Ludovic Courtès <address@hidden>
>> Xin Wang <address@hidden> skribis:
>> > In Guile, the equivalent of kill-thread is cancel-thread, and is there
>> > equivalent of break-thread?
>> >  http://docs.racket-lang.org/reference/breakhandler.html
>> If I understand correctly, “breaks” are similar to Guile’s “asyncs”
>> (info "(guile) Asyncs").
>> However, I don’t understand what you’re trying to achieve. Could you
>> give another example of the behavior you’re after?
> I was reading source code of Arc language, and wondering if it is
> possible to port it to Guile.
> It define a function to handle HTTP request in srv.arc(L48):
> (def handle-request-1 (s)
> --- pruned ---
> (with (th1 nil th2 nil)
> (= th1 (thread
> (after (handle-request-thread i o ip)
> (close i o)
> (kill-thread th2))))
> (= th2 (thread
> (sleep threadlife*)
> (unless (dead th1)
> (prn "srv thread took too long for " ip))
> (break-thread th1)
> (force-close i o))))))))
> It create two threads to handle a request, one do main stuff and anthor one
> wait to kill first one if it takes too much time.
Hmm, I guess I still don’t understand what ‘break-thread’ is supposed to do.
> Although I'm not quite sure, I think one reason to use 'kill-thread' and
> 'break-thread' differently is to make sure that exception handler function
> is fully executed. ('after' is implemented by dynamic-wind).
|[Prev in Thread]||Current Thread||[Next in Thread]|