Re: [perl-win32-gui-users] Avoid the appearance of a "frozen" window

[Jeremy W. <jez...@ho...>]

 
> On Wed, 18 Jun 2008, Charles Alderman wrote:
> > I've had some luck doing this using fork() and a pipe to communicate
> > between the (pseudo) processes. On Win32, fork is emulated using perl
> > threads. So it's basically the same thing. I haven't tested this on
> > Perl 5.10 yet, but I've had a gui application built this way running
> > and in use for more than 18 months now.
> >
> > Create and layout the window before spawning a new process/thread, as
> > both pseudo processes can use the same gui handles.
> 
> You are not really supposed to use GUI handles from a thread that doesn't
> own them (the one that has created them).  While "read" access is generally
> safe, modifying GUI objects from non-owning threads isn't.  For example:
> 
>     http://blogs.msdn.com/oldnewthing/archive/2005/10/10/479124.aspx

Just to add that you can also spawn multiple threads, each creating their own Win32::GUI windows (with their own message queues) allowing each thread to have each an "instance" of the application. It might sound clunky, but it does scale well on dual/quad cores.

Cheers,

jez.

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