From owner-freebsd-hackers@FreeBSD.ORG  Wed Mar 16 15:23:13 2011
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id ABCB41065672;
	Wed, 16 Mar 2011 15:23:13 +0000 (UTC) (envelope-from yuri@rawbw.com)
Received: from shell0.rawbw.com (shell0.rawbw.com [198.144.192.45])
	by mx1.freebsd.org (Postfix) with ESMTP id 921378FC17;
	Wed, 16 Mar 2011 15:23:13 +0000 (UTC)
Received: from eagle.yuri.org (stunnel@localhost [127.0.0.1])
	(authenticated bits=0)
	by shell0.rawbw.com (8.14.4/8.14.4) with ESMTP id p2GFJcmt067202;
	Wed, 16 Mar 2011 08:19:38 -0700 (PDT) (envelope-from yuri@rawbw.com)
Message-ID: <4D80D5E0.5080302@rawbw.com>
Date: Wed, 16 Mar 2011 08:23:12 -0700
From: Yuri <yuri@rawbw.com>
User-Agent: Mozilla/5.0 (X11; U; FreeBSD amd64; en-US;
	rv:1.9.1.16) Gecko/20101211 Thunderbird/3.0.11
MIME-Version: 1.0
To: David Xu <davidxu@freebsd.org>
References: <4D6ABA14.80208@rawbw.com> <4D6AC17A.7020505@rawbw.com>
	<4D6B01DB.9090909@freebsd.org>
In-Reply-To: <4D6B01DB.9090909@freebsd.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: Garrett Cooper <yanegomi@gmail.com>, freebsd-hackers@freebsd.org,
	standards@freebsd.org
Subject: Re: Is pthread_cond_signal(3) man page correct?
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 16 Mar 2011 15:23:13 -0000

On 02/27/2011 18:00, David Xu wrote:
> I think in normal case, pthread_cond_signal will wake up one thread,
> but other events for example, UNIX signal and fork() may interrupt
> a thread sleeping in kernel, and cause pthread_cond_wait to return
> to userland, this is called spurious wakeup, and other events, I
> can not think of yet, but I believe they exist.
>    

Does this mean that pthread_cond_signal can also return EINTR? This 
isn't in pthread_cond_signal(3) either.

Is this the case that all system calls should be assumed to be able to 
return EINTR or only those that have EINTR in their man pages?

Yuri