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Message-ID: <46605F54.7080507@amar.com>
Date: Fri, 01 Jun 2007 11:03:00 -0700
From: Jacques Amar <jaapr@amar.com>
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To: joshrotenberg@gmail.com
CC: APR devlist <dev@apr.apache.org>
Subject: Re: Shared Memory Usage Example
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 <66d719cf0705311110v2b2a3f22j5f99643dee04a696@mail.gmail.com>
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josh rotenberg wrote:
> I haven't looked at them  that closely, but it looks like in the APR
> distribution there are a few tests that exercise the apr_shm_* stuff,
> namely testshm.c, testshmproducer.c, and testshmconsumer.c. Do these
> get you anywhere?
> 
> Josh

Thanks Josh,

I went ahead and did RTFC. It seems that non anonymous shared memory is 
using memory mapped files, as opposed to the Linux way of using a 16 bit 
name in a shared memory. It is more susceptible to name clobbering, but 
eliminates the need to make sure there is a write permissible file 
available on every client.

I guess I will have to implement using good old ipcs shm and one day 
attempt to emend the apr lib for it. Just not good enough in 
Windows/Novell environment to make it portable.


- Jacques


> 
> On 5/31/07, Jacques Amar <jaapr@amar.com> wrote:
>> I am using apr in a non httpd application. I would like to use a shared
>> memory area to pass information between two different standalone
>> programs, so I need the shmem to be named. I am trying NOT to resort to
>> the built-in Linux shmget. Can anyone point a code example of this being
>>   done properly. My current example gives me an error 17 => File Exists.
>>
>> Thanks
>>
>>
>>
>>