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Posted to dev@httpd.apache.org by Xavier Beaudouin <ki...@oav.net> on 2005/01/13 19:01:28 UTC
APR and mutexes ?
Hello there,
I have inside a Apache2 module a call to a non thread safe function. I
need then to do :
mutex_set();
call_to_non_thread_safe();
unset_mutex();
Now I can do that using POSIX calls, but I really like to use APR calls.
Is there any good doc or even an example module I can use to make such
work ?
Many thanks to all:)
/Xavier
--
Xavier Beaudouin - Unix System Administrator & Projects Leader.
President of Kazar Organization : http://www.kazar.net/
Please visit http://caudium.net/, home of Caudium & Camas projects
Re: APR and mutexes ?
Posted by Jeff Trawick <tr...@gmail.com>.
On Thu, 13 Jan 2005 19:01:28 +0100, Xavier Beaudouin <ki...@oav.net> wrote:
> Hello there,
>
> I have inside a Apache2 module a call to a non thread safe function. I
> need then to do :
>
> mutex_set();
> call_to_non_thread_safe();
> unset_mutex();
>
> Now I can do that using POSIX calls, but I really like to use APR calls.
>
> Is there any good doc
apr_thread_mutex.h
> or even an example module I can use to make such
> work ?
$ cd /apache/source/tree
$ grep apr_thread_mutex `find modules -name '*.c'`
These modules will give examples of where in Apache module the
initialization should occur, as well as sample calls during request
processing.
Re: APR and mutexes ?
Posted by Andy Armstrong <an...@hexten.net>.
Xavier Beaudouin wrote:
> Is there any good doc or even an example module I can use to make such
> work ?
mod_log_rotate for Apache 2 uses mutexes. The source is here:
http://www.hexten.net/sw/mod_log_rotate/apache2/mod_log_rotate.c
--
Andy Armstrong, hexten.net
Re: APR and mutexes ?
Posted by Andy Armstrong <an...@apache.org>.
Xavier Beaudouin wrote:
> Is there any good doc or even an example module I can use to make
such work ?
mod_log_rotate for Apache 2 uses mutexes. The source is here:
http://www.hexten.net/sw/mod_log_rotate/apache2/mod_log_rotate.c
--
Andy Armstrong, hexten.net
Re: APR and mutexes ?
Posted by Nick Kew <ni...@webthing.com>.
On Thu, 13 Jan 2005, Xavier Beaudouin wrote:
> I have inside a Apache2 module a call to a non thread safe function. I
> need then to do :
>
> mutex_set();
> call_to_non_thread_safe();
> unset_mutex();
>
> Now I can do that using POSIX calls, but I really like to use APR calls.
Yep. That's right for a module. But there's a bit more than that:
to work across all platforms you need
#if APR_HAS_THREADS
apr_thread_mutex_dosomething(...) ;
#endif
> Is there any good doc or even an example module I can use to make such
> work ?
The doc is in /usr/local/apache/include (or wherever you put your headers).
I recently dealt with this in the apr_dbd package -
see http://www.apache.org/~niq/dbd.html
BTW, doesn't anyone else think it's wrong for apps to have to faff
around with #ifdefs, when it would be trivial for apr_thread_mutex.h
to #define all the functions out when not APR_HAS_THREADS?
BTW2, this looks more appropriate to the modules list than here.
--
Nick Kew