trylock does not work on RH 9

[apr]

Hi,

I am writing an Apache 2.0 module and have problems with the mutex_trylock 
functions.

apr_global_mutex_lock() and apr_global_mutex_unlock() work but
apr_global_mutex_trylock() segfaults the apache2 childs on my RedHat 9 box.

Any help is welcome... is this a bug or do I have to use trylock() with 
different arguments than lock() ?

Greetings,
 Reinhard

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