[Openmcl-devel] YAWC (Yet Another Weird Crash)

Gail Zacharias gz at clozure.com
Thu May 28 23:28:31 UTC 2009


Yup.  We have gui::execute-in-gui along the same lines.  We don't 
have exports and documentation for the GUI package yet, but this will 
be one of the first things to export once we do....


At 5/28/2009 07:07 PM, Raffael Cavallaro wrote:

>On May 28, 2009, at 5:52 PM, Ron Garret wrote:
>
> >  I've already checked the
> > obvious things like the reference counts on the PDF files dropping to
> > zero and everything seems OK.
>
>
>I don't see the effect you're seeing - I've tried several times
>already. However, I notice you're doing gui things without ensuring
>they happen on the main thread. Could this be it? Apple want you to
>use performSelectorOnMainThread:withObject:yadaYadaYada & co.
>
>FWIW, I use this for all calls that frob GUI entities - it
>accomplishes the same thing, but unlike the above Cocoa call, it isn't
>limited to a single parameter:
>
>(in-package :ccl)
>
>(defmacro gui-do (&body body)
>    (let ((values-list (gensym "GUI-DO-VALUES-LIST"))
>          (sem (gensym "GUI-DO-SEMAPHORE")))
>      `(if (eq *current-process* ccl::*initial-process*)
>         (progn , at body)
>         (let* ((,sem (make-semaphore))
>                (,values-list nil))
>           (process-interrupt
>            ccl::*initial-process*
>            (lambda ()
>              (setq ,values-list (multiple-value-list (progn , at body)))
>              (signal-semaphore ,sem)))
>           (wait-on-semaphore ,sem)
>           (values-list ,values-list)))))
>
>I also have another version which doesn't wait for the return value(s)
>if you're interested.
>
>So calls to things like #/setContentView: I would wrap thus: (gui-do
>(#/setContentView: ... etc. just to ensure they happen on the main
>thread.
>
>Hopefully the Clozure crew will let me know if this is really
>wrongheaded.
>
>regards,
>
>
>
>
>
>Raffael Cavallaro
>raffaelcavallaro at me.com
>
>
>
>
>
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