pthread: thread switching bug?

[Robert Collins]

> -----Original Message-----
> From: Christopher Faylor [ mailto:cgf@redhat.com ]
> >Thanks for the testing, you've shown that there is non 
> thread safe code,
> >probably in the fhandler_consoler in cygwin, or possibly in the MS
> >Windows console code. Right now we don't know which.
> 
> I'm still not sure why this is a cygwin bug.  Is there some 
> requirement
> that writes to the console be atomic?  Your (Robert's) original email
> indicated that the Opengroup spec didn't have this as a requirement.

It's non expected behaviour at the least. At worst it could be a symptom
of something more serious that is faulty. I intend to analyse it at some
point. 

The Opengroup spec for printf doesn't document any thead safety needs,
but, one would expect fprintf to a file to be atomic regardless of the
actual file... There are separate thread considerations elsewhere in
that tome, but I don't have time to dig them up right now.

Rob

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