Re: unwind-protect within while-no-input

[Eshel Yaron <me@eshelyaron.com>]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Spencer Baugh <sbaugh@janestreet.com>
>> Date: Thu, 09 May 2024 09:07:10 -0400
>>
>> I'm writing a completion-at-point-function and completion table.  This
>> table internally uses asynchronous subprocesses to get completions.
>>
>> This completion-at-point-function and table may be called by the popular
>> completion frontend corfu-mode.  corfu-mode uses while-no-input around
>> calls to completion tables.
>>
>> I want to ensure that my asynchronous subprocesses are deleted even if
>> my code is interrupted by corfu's while-no-input.
>
> Negotiate some protocol with corfu-mode to allow cleanup code to run?

Incidentally, we call c-a-p-fs and query completion tables within
while-no-input also in completion-preview-mode.  So if there's a need
for some extra accommodations and a protocol is devised for that, it'd
be great if it could be adopted in completion-preview-mode as well.

> Or maybe the completion machinery already has such protocols defined?
> (Because this cannot be the first case where a completion function
> needs to clean up, can it?)
>
> Alternatively, run the cleanup from a timer you start in your
> completion-at-point-function?