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Date: Thu, 17 Mar 2011 09:54:07 +0800
From: David Xu <davidxu@freebsd.org>
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To: Yuri <yuri@rawbw.com>
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Cc: Garrett Cooper <yanegomi@gmail.com>, freebsd-hackers@freebsd.org,
	standards@freebsd.org
Subject: Re: Is pthread_cond_signal(3) man page correct?
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On 2011/03/16 23:23, Yuri wrote:
> 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.
> 

No, it will return zero, returning EINTR is not allowed.

> 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
>