From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Chong Yidong <cyd@stupidchicken.com>
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: Mon, 17 Aug 2009 11:36:56 -0400 [thread overview]
Message-ID: <jwvd46ucw8q.fsf-monnier+emacsbugreports@gnu.org> (raw)
In-Reply-To: <87eircjz9o.fsf@cyd.mit.edu> (Chong Yidong's message of "Sat, 15 Aug 2009 21:58:11 -0400")
>> 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.
I don't know. You already changed it in that direction a year ago:
timestamp: Mon 2008-05-19 22:29:33 +0000
message:
(wait_reading_process_output): Always check status when in batch mode.
so maybe we should change it even further? I think a good change would
be to change the code of wait_reading_process_output such that status
changes are taken into account (even when do_display is 0) but only for
the process(es) for which we're waiting.
Stefan
next prev parent reply other threads:[~2009-08-17 15:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-16 1:58 bug#2930: 23.0.92; `accept-process-output' and `sleep-for' do not run sentinels Chong Yidong
2009-08-17 15:36 ` Stefan Monnier [this message]
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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