Re: APR feature detection

[Dave Ingram]

Sorin Manolache wrote:
 On Thu, Apr 2, 2009 at 19:45, Dave Ingram d...@dmi.me.uk wrote:
   
 Hi guys,

 Is there any way that my module can detect which APR features are
 enabled in Apache? It relies on DBD, and if that's not available then my
 module just segfaults, which isn't very friendly. I'd prefer to give an
 error message to the user, telling them that DBD is required.

 Does anyone have any tips, or should I ask the APR list instead?
 

 dbd does this:
 APR_REGISTER_OPTIONAL_FN(ap_dbd_prepare);
 APR_REGISTER_OPTIONAL_FN(ap_dbd_open);
 APR_REGISTER_OPTIONAL_FN(ap_dbd_close);
 APR_REGISTER_OPTIONAL_FN(ap_dbd_acquire);
 APR_REGISTER_OPTIONAL_FN(ap_dbd_cacquire);

 APR_RETRIEVE_OPTIONAL_FN(one of the functions above) should give you
 NULL if DBD is absent.

 The two macros are declared in apr_optional.h.
   

Actually, that's not quite what I was after -- those are defined by
mod_dbd, which I don't rely on (as it's initialised too late for my
module's purposes). I do all of the DBD interaction myself. Is there any
other way to be sure it's enabled? Would:

if (apr_dbd_open != NULL) {
  // error...
}

work?


Dave

Re: custom background thread and module sharing a data structure

[Dave Ingram]

Hi Sorin,

Sorin Manolache wrote:
 On Wed, Mar 11, 2009 at 02:08, Andrej van der Zee
 andrejvander...@gmail.com wrote:
   
 Hi,

 I need to modify Apache and run one custom background thread. In addition,
 my custom modules have to be able to share a data structure with this
 background thread. Did anybody do this before? Is there an example I can use
 as a starting point?
 

 Yes, I did this. I will send you a commented source file sometimes
 today or early tomorrow (Central European Time), I don't really have
 time now.
   
I'm interested in something similar -- would you please send me some
example sources as well?

Thanks,


Dave