CYGWIN 1.5.9-1 - Is vprintf() not thread safe?

[Brian Ford]

On Fri, 21 May 2004, John William wrote:

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