Mailing-List: contact dev-help@apr.apache.org; run by ezmlm
Precedence: bulk
From: "Marc M. Adkins" <mmadki@Doorways.org>
To: <dev@apr.apache.org>
Subject: RE: read/write lockout
Date: Sun, 15 Jun 2003 12:08:55 -0700
Message-ID: <OIECKMOJOMBCOBBGDMKACEPMDGAA.mmadki@Doorways.org>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit
In-Reply-To: <OIECKMOJOMBCOBBGDMKACENODGAA.mmadki@Doorways.org>
Importance: Normal

I have code that uses a rwlock, a mutex, a condition, and an atomic variable
to provide something approaching fairness (on W2K, I haven't gotten around
to testing this on Linux yet).  I can post it if anyone is interested.

mma

> -----Original Message-----
> From: Marc M. Adkins [mailto:mmadki@Doorways.org]
> Sent: Thursday, June 12, 2003 4:30 PM
> To: dev@apr.apache.org
> Subject: read/write lockout
> 
> 
> On W2K, read/write locks can result in writer starvation.  If there are a
> lot of readers a writer may never get a chance to lock at all.  
> I'm assuming
> that 'fairness' in this sense is simply not guaranteed by APR.  I was
> wondering if anyone else had run up against this and how they solved it.
> 
> mma
> 
>