Re: Event loop processing in threads that must block

On Thu, 2001-11-15 at 11:33, Havoc Pennington wrote:

Luciano Chavez <lnx1138 us ibm com> writes: 
I apologize for the lack of clarity. Maybe I should ask simply, can I
execute gtk_main () on two separate threads or can there only be one
thread executing the gtk_main () event loop? I am not talking about
nested gtk_main () calls but independent threads calling gtk_main

Ah, no, you can't do that in GTK 1.2 I don't think. GTK 2.0 gives you
more flexibility (using the GLib-level main loop API).
A typical trick is to somehow get your UI action to happen in the main
thread, e.g. by queuing an idle function. Then you could block the
other thread (pthread_cond_wait?) and wake it up when gtk_main()
returns in the main thread.

Understood. That just sounds wacky enough to work. :-)

I'll give it a try when I get back to work on the messaging callback

Also, can you nest gdk_thread_enter/leave calls? Do they keep reference
counts so that the last leave does releases the gdk mutex?

No, they aren't recursive.

Bummer. Coming from OS/2 development this sort of thing is taken for
granted. I'll be careful then using them.


Thanks for the advice.


Luciano Chavez

lnx1138 us ibm com 

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