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From "Joshua Slive" <>
Subject Re: [users@httpd] Apache Modules - Modifying and Persisting Values in Memory Across Requests
Date Tue, 25 Sep 2007 23:05:25 GMT
On 9/25/07, Mike O'Leary <> wrote:
> Hello,
> Can someone explain a way via a C module to update a counter value for every
> request served by the module and write that value (via ap_rputs or something
> similar) to the browser.  For example, the first time the module services a
> request, it writes 1 to the browser, the next time it writes 2, ....  I
> tried apr_pool_userdata_get/set with r->server->process->pool as my memory
> pool, but this doesn't seem to work.  This value appears to be in memory
> sometimes but not others.  It will increment as expected for awhile and then
> drop back to 0.  I'm not trying to implement a counter for my page.  I'm
> trying to think of the simplest example so that once I see how this is done,
> I can easily extrapolate to solve my real problem.  Any help is appreciated,
> especially code!

You'll need to use shared memory for that. Apache pool memory is process-local.

You'll probably get more detailed help on the module developer's list.


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