From: Chong Yidong <cyd@stupidchicken.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: 2930@emacsbugs.donarmstrong.com, Markus Triska <markus.triska@gmx.at>
Subject: bug#2930: 23.0.92; `accept-process-output' and `sleep-for' do not run sentinels
Date: Sat, 15 Aug 2009 21:58:11 -0400 [thread overview]
Message-ID: <87eircjz9o.fsf@cyd.mit.edu> (raw)
> The documentation for sentinels states:
>
> A program can wait, so that sentinels will run, by calling
> `sit-for' or `sleep-for' (...), or `accept-process-output' (...).
>
> However, when I do M-x eval-region RET on the following forms in
> "emacs -Q", then Emacs loops unexpectedly:
>
> (defun my-sentinel (proc str)
> (setq my-finished t))
>
> (let ((p (start-process "bc" nil "bc"))
> my-finished)
> (set-process-sentinel p 'my-sentinel)
> (process-send-string p "quit\n")
> (while (not my-finished)
> (accept-process-output nil 0.1)))
The trouble is that accept-process-output passes a zero DO_DISPLAY
argument to wait_reading_process_output (process.c:4306). When
DO_DISPLAY is zero, status notifications are not performed
(process.c:4763).
Having accept-process-output pass a non-zero DO_DISPLAY argument to
wait_reading_process_output fixes this problem, but I don't know what
ramifications this would have.
Stefan, WDYT?
next reply other threads:[~2009-08-16 1:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-16 1:58 Chong Yidong [this message]
2009-08-17 15:36 ` bug#2930: 23.0.92; `accept-process-output' and `sleep-for' do not run sentinels Stefan Monnier
2009-08-17 21:04 ` Chong Yidong
[not found] ` <mailman.4807.1250524020.2239.bug-gnu-emacs@gnu.org>
2009-08-17 16:34 ` Markus Triska
-- strict thread matches above, loose matches on Subject: below --
2009-04-08 18:30 Markus Triska
2009-04-08 21:11 ` Stefan Monnier
[not found] ` <mailman.4941.1239225840.31690.bug-gnu-emacs@gnu.org>
2009-04-08 21:29 ` Markus Triska
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