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bug#44333: 27.1; macOS menu bar 2-clicks

From: Mattias Engdegård
Subject: bug#44333: 27.1; macOS menu bar 2-clicks
Date: Sun, 1 Nov 2020 11:50:32 +0100

31 okt. 2020 kl. 16.01 skrev Alan Third <alan@idiocy.org>:

> IIRC the problem is due to the reposting of the menu click event so
> the menu can be populated when lisp is running. The Mac port doesn't
> have this problem most probably because it's a completely different
> architecture but it has the GUI and lisp parts split into two separate
> threads which is one way I can see of fixing this.

Last time I looked it seemed that the Mac port actually did synthesise events 
but used some other means (Carbon?), but I may be wrong.

> If anyone else has a simpler solution I'd love to hear it.

Maybe we are overthinking it. I don't think the Cocoa event loop really is 
running in a different thread. Anecdotal evidence (printf!) indicates that it 

(https://debbugs.gnu.org/cgi/bugreport.cgi?bug=32864#38 has a previous 
investigation into the matter.)

I just did the simplest thing possible and it works (with a slight latency at 
times, but perhaps tolerable). I'd like to know what's wrong with running Lisp 
in the event loop. It does appear safe to me.

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