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content-class:	urn:content-classes:message
Subject:	RE: pthread: thread switching bug?
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Date:	Thu, 1 Nov 2001 13:38:03 +1100
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Message-ID:	<EA18B9FA0FE4194AA2B4CDB91F73C0EF08F24F@itdomain002.itdomain.net.au>
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Thread-Topic:	pthread: thread switching bug?
Thread-Index:	AcFifdSI2hDh9mh9SKi6pgxIid3PXAAABCEw
From:	"Robert Collins" <robert DOT collins AT itdomain DOT com DOT au>
To:	<cygwin AT cygwin DOT com>
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> -----Original Message-----
> From: Christopher Faylor [mailto:cgf AT redhat DOT 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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