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bug#38807: [Feature request]: Support lisp workers like web workers.

From: Eli Zaretskii
Subject: bug#38807: [Feature request]: Support lisp workers like web workers.
Date: Sat, 04 Jan 2020 11:51:30 +0200

> Date: Sat, 4 Jan 2020 17:33:18 +0800
> From: HaiJun Zhang <address@hidden>
> Cc: address@hidden, address@hidden
>  How would that work? We don't have any such message queues in Emacs,
>  and no machinery to display them, nor for telling the user which job
>  reported the message.
> Some APIs need to be added for communication use. The UI part of the email 
> client known what happens and
> will tell the user. 

Sorry, such general and vague suggestions aren't useful.  You need to
propose specific changes that are consistent with how Emacs is
designed and implemented.  You need to describe those new APIs, and
you need to tell how will they be used by the existing code that
displays messages in the echo area.

It goes without saying that an editor different from Emacs could be
designed from scratch to support multi-threading between the UI and
the processing engine.  The issues at hand are (a) would such an
editor be as powerful and flexible as Emacs, in terms of letting the
programs written in the extension language control what is being
displayed and where; and (b) would it be possible to add such
threading to Emacs as it is now without completely redesigning how it
processes input events and how it displays messages to the user.

So any proposals in that direction must be more concrete and directly
related to how Emacs works now, otherwise this will not be a
discussion of any practical interest for Emacs development.

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