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Re: Concurrency via isolated process/thread

From: Eli Zaretskii
Subject: Re: Concurrency via isolated process/thread
Date: Mon, 10 Jul 2023 16:09:37 +0300

> From: Ihor Radchenko <yantar92@posteo.net>
> Cc: monnier@iro.umontreal.ca, luangruo@yahoo.com, emacs-devel@gnu.org
> Date: Mon, 10 Jul 2023 11:30:10 +0000
> AFAIU, it is currently not possible to redisplay asynchronously.

The main reason for that is that redisplay accesses the global state
in many places, and so it needs that global state to stay put.  Wed
already have trouble with keeping this so because we allow to run Lisp
from various hooks called by redisplay and via :eval in the mode line.
Quite a few bugs were caused by these, and had to be fixed by "fixing
up" the state, like making sure the selected frame/window were not
deleted under your feet etc.

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