Mailing-List: contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT sources DOT redhat DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT sources DOT redhat DOT com>
List-Help: <mailto:cygwin-help AT sources DOT redhat DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT sources DOT redhat DOT com
Delivered-To: mailing list cygwin AT sources DOT redhat DOT com
From: Chris Faylor <cgf AT cygnus DOT com>
Date: Tue, 18 Jul 2000 15:18:57 -0400
To: Cygwin AT Sourceware DOT Cygnus DOT Com
Subject: Re: Is cygnus multithreadability usable?
Message-ID: <20000718151857.E26695@cygnus.com>
Reply-To: cygwin AT sources DOT redhat DOT com
Mail-Followup-To: Cygwin AT Sourceware DOT Cygnus DOT Com
References: <85256920 DOT 0066081D DOT 00 AT nyc-ntgw-n01 DOT ny DOT jpmorgan DOT com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.2i
In-Reply-To: <85256920.0066081D.00@nyc-ntgw-n01.ny.jpmorgan.com>; from yap_noel@jpmorgan.com on Tue, Jul 18, 2000 at 02:34:31PM -0400

On Tue, Jul 18, 2000 at 02:34:31PM -0400, Noel L Yap wrote:
>I think printf(), by definition, is not threadsafe.  The caller is responsible
>for making threadsafe calls to it.

Right.

cgf

>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-)

--
Want to unsubscribe from this list?
Send a message to cygwin-unsubscribe AT sourceware DOT cygnus DOT com