From: "Bart Schaefer" <schaefer@candle.brasslantern.com>
To: Andrej Borsenkow <Andrej.Borsenkow@mow.siemens.ru>,
Clint Adams <clint@zsh.org>
Cc: <zsh-workers@sunsite.dk>, <100336-forwarded@bugs.debian.org>,
<debian-hppa@lists.debian.org>, <joy@debian.org>
Subject: Re: hppa problems
Date: Mon, 11 Jun 2001 05:50:16 +0000 [thread overview]
Message-ID: <1010611055016.ZM22011@candle.brasslantern.com> (raw)
In-Reply-To: <Pine.SV4.4.33.0106110928540.18037-100000@itsrm2.mow.siemens.ru>
On Jun 11, 9:35am, Andrej Borsenkow wrote:
}
} 3. There is an obvious race condition here (between call to sigsuspend and
} child exit).
No, there's no race condition. These two lines:
sigfillset(&set);
sigprocmask(SIG_SETMASK, &set, 0);
mean that SIGCHLD is blocked (along with all other blockable signals).
The sigsuspend() then should unblock SIGCHLD and either wait for the
child to exit, or immediately allow the signal to be delivered if the
child has exited already, and then return. The test is in part trying
to demonstrate that the implicit race-resolution in this block/suspend
pair does in fact resolve the race.
--
Bart Schaefer Brass Lantern Enterprises
http://www.well.com/user/barts http://www.brasslantern.com
Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net
prev parent reply other threads:[~2001-06-11 5:52 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-10 11:07 PATCH: config.{guess,sub} upgrade Clint Adams
2001-06-10 12:10 ` hppa problems Clint Adams
2001-06-10 16:34 ` Bart Schaefer
2001-06-10 23:10 ` Clint Adams
2001-06-11 0:19 ` Clint Adams
2001-06-11 3:04 ` Bart Schaefer
2001-06-11 13:59 ` Clint Adams
2001-06-11 5:35 ` Andrej Borsenkow
2001-06-11 5:50 ` Bart Schaefer [this message]
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