Mailing-List: contact dev-help@httpd.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@httpd.apache.org
Received-SPF: pass (asf.osuosl.org: domain of jfclere@gmail.com designates
 64.233.182.189 as permitted sender)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
        s=beta; d=gmail.com;
        h=received:message-id:date:from:user-agent:x-accept-language:mime-version:to:subject:references:in-reply-to:content-type:content-transfer-encoding;
        b=ciOa6fLb7zp9uKlmqJx9tt/gI5p8zpkIUsSXANdAghzW0gb/7gzMwKbdhFct83vL0WGeWD8MV++dynL1Aao/GHHtNpZng912GstJa81rOsimR3N83DakWG1dIlDyBOZw8l/W2ICVKlQl0yOe1HzRkvLTyJbMci0hATL8JWdglmw=
Message-ID: <44B67322.8070302@gmail.com>
Date: Thu, 13 Jul 2006 18:21:54 +0200
From: Jean-frederic Clere <jfclere@gmail.com>
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.13) Gecko/20060417
MIME-Version: 1.0
To: dev@httpd.apache.org
Subject: Re: Additing a storage for the shared information of the worker in
 mod_proxy
References: <44B576AF.6080303@gmail.com> <44B579AA.1080205@turner.com>
 <5D8F9212-834B-4E18-AC7E-9A4008C634BD@jaguNET.com>
 <44B65285.8070901@turner.com> <44B66CD5.5050508@gmail.com>
 <44B66DC7.5040103@turner.com>
In-Reply-To: <44B66DC7.5040103@turner.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Brian Akins wrote:

> Jean-frederic Clere wrote:
>
>> With such an interface you assume only one process will access to one 
>> slot... That is what the scoreboard allows.
>> Allowing updates from different proccesses on the same slot.
>> Should we have an ap_slot_read_look() and an ap_slot_unlock() for that?
>
>
> No. we don't have such for the "built-in" scoreboard.  Anything can 
> read the scoreboard, only current "worker slot" can change it.  that's 
> why in the "sample" API, to get the memory you pass a conn_rec.
>
> If it's slow, people won't use it.  Semaphores are generally "slow." 
> Enforcing it by convention like we currently do seems reasonable.
>
The workers shared information is shared by the processes already, all 
the processes may access the same slot or I am complety wrong?

Cheers

Jean-Frederic