From: Eli Zaretskii <eliz@gnu.org>
To: emacs-devel@gnu.org,Andreas Schwab <schwab@linux-m68k.org>
Cc: phst@google.com, p.stephani2@gmail.com
Subject: Re: scratch/sigchld-fd 8f0ce42 1/2: Fix deadlock when receiving SIGCHLD during 'pselect'.
Date: Wed, 20 Jan 2021 12:14:53 +0200 [thread overview]
Message-ID: <5638F98B-832B-456A-89F6-559DFB43BBAD@gnu.org> (raw)
In-Reply-To: <87lfcovuec.fsf@igel.home>
On January 20, 2021 11:18:19 AM GMT+02:00, Andreas Schwab <schwab@linux-m68k.org> wrote:
> On Jan 20 2021, Eli Zaretskii wrote:
>
> > Please tell more, especially what is meant by "checking for the
> signal". We have a handler installed, so who is or should be checking
> for it?
>
> The check that the signal occured and what to pass to pselect so it
> doesn't block waiting for the condition that just occured.
If/when the signal arrives, the handler removes the file descriptor of the process from the set on which pselect will wait. Isn't that sufficient to prevent us from waiting for a dead process?
If not, why not?
next prev parent reply other threads:[~2021-01-20 10:14 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210116184947.2105.45267@vcs0.savannah.gnu.org>
[not found] ` <20210116184949.3C17C211A5@vcs0.savannah.gnu.org>
2021-01-19 15:10 ` scratch/sigchld-fd 8f0ce42 1/2: Fix deadlock when receiving SIGCHLD during 'pselect' Eli Zaretskii
2021-01-19 18:21 ` Philipp Stephani
2021-01-19 19:14 ` Eli Zaretskii
2021-01-19 20:22 ` Philipp Stephani
2021-01-20 15:05 ` Eli Zaretskii
2021-01-23 17:36 ` Philipp Stephani
2021-01-23 18:23 ` Eli Zaretskii
2021-01-23 18:30 ` Philipp Stephani
2021-01-19 20:46 ` Andreas Schwab
2021-01-19 20:58 ` Philipp Stephani
2021-01-20 18:07 ` Andreas Schwab
2021-01-20 3:37 ` Eli Zaretskii
2021-01-20 8:37 ` Andreas Schwab
2021-01-20 8:52 ` Eli Zaretskii
2021-01-20 9:18 ` Andreas Schwab
2021-01-20 10:14 ` Eli Zaretskii [this message]
2021-01-20 10:17 ` Andreas Schwab
2021-01-20 15:30 ` Eli Zaretskii
2021-01-20 15:48 ` Andreas Schwab
2021-01-20 16:40 ` Eli Zaretskii
2021-01-20 16:44 ` Andreas Schwab
2021-01-20 17:03 ` Eli Zaretskii
2021-01-20 17:30 ` Andreas Schwab
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