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From:	"Noel L Yap" <yap_noel AT jpmorgan DOT com>
To:	kulack AT us DOT ibm DOT com
cc:	Cygwin AT Sourceware DOT Cygnus DOT Com
Message-ID:	<85256920.0066081D.00@nyc-ntgw-n01.ny.jpmorgan.com>
Date:	Tue, 18 Jul 2000 14:34:31 -0400
Subject:	Re: Is cygnus multithreadability usable?
Mime-Version:	1.0

I think printf(), by definition, is not threadsafe.  The caller is responsible
for making threadsafe calls to it.

Noel




kulack AT us DOT ibm DOT com on 2000.07.18 14:18:40

To:   cygwin AT sourceware DOT cygnus DOT com
cc:   (bcc: Noel L Yap)
Subject:  Re: Is cygnus multithreadability usable?




> Multithread-safe support is turned on by default in 1.1.x releases.
> That does not mean that it is bug free.
> cgf
Interesting. I was using just a minimal amound of C runtime stuff (mainly
printf), and noticed thread safety problems so I just assumed it wasn't
safe. For my projects, it didn't matter much, but now that you mention the
above, it might just be a simple bug.

Thread 1:
printf("abc\n");

Thread 2:
printf("xyz\n")

Frequently results in the newlines intermingling:
<abcxyz

>
On one occasion I believe that the output was more mixed than that, but I
could be making that up... 8-)



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