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Date: Tue, 15 Feb 2005 15:59:36 -0800
From: Ulrich Drepper <drepper@gmail.com>
Reply-To: Ulrich Drepper <drepper@gmail.com>
To: Yves Crespin <crespin.quartz@wanadoo.fr>
Subject: Re: sigwait() and 2.6
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
       Yves Crespin <Crespin.Quartz@wanadoo.fr>
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On Tue, 15 Feb 2005 13:58:28 +0100, Yves Crespin
<crespin.quartz@wanadoo.fr> wrote:
>        ThreadUnblockSignal();
>        signo = WaitSignal();
>        ThreadBlockSignal();

You expect this to work?  Just read the POSIX spec or even the man
pages.  All signals sigwait() waits for must be blocked before the
call.  You deliberately do the opposite.  Swap the ThreadUnblockSignal
and ThreadBlockSignal lines and suddenly the program doesn't crash
anymore.