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Date:	Fri, 21 May 2004 11:19:40 -0500
From:	Brian Ford <ford AT vss DOT fsi DOT com>
Reply-To:	cygwin AT cygwin DOT com
To:	John William <jw2357 AT hotmail DOT com>
cc:	cygwin AT cygwin DOT com
Subject:	Re: CYGWIN 1.5.9-1 - Is vprintf() not thread safe?
In-Reply-To:	<BAY1-F44GxqymcgfyDy000249a4@hotmail.com>
Message-ID:	<Pine.CYG.4.58.0405211113290.3524@fordpc.vss.fsi.com>
References:	<BAY1-F44GxqymcgfyDy000249a4 AT hotmail DOT com>
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On Fri, 21 May 2004, John William wrote:

> >From: Brian Ford <ford AT SNIP>
> >To: John William <jw2357 AT SNIP>

http://cygwin.com/acronyms/#PCYMTNQREAIYR

> >IIRC, several thread safe stdio issues have been fixed recently, both in
> >Cygwin and in newlib.  Please try a recent Cygwin DLL snapshot:
> >
> >http://cygwin.com/snapshots/
> >
> >and report back.  Thanks.
>
> I tried the cygwin.dll snapshot dated 2004-05-20 and it still outputs
> interleaved text with multiple threads and vprintf()/vsprintf() crash when
> called from multiple threads and not protected with mutex_lock() and
> mutex_unlock() calls around them. This is on a dual-processor system, BTW.

How about posting a simple test case.  If you do so, I'll try and take a
look.

-- 
Brian Ford
Senior Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
the best safety device in any aircraft is a well-trained pilot...

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