zend api / strange segfault in extension

Hello,

I'm developing a php extension as a communication layer for a
proprietary database.

Now, when I run two different versions of this extension on the same
webserver (Apache 3, PHP 4.3.3, extension loaded via dl() ), I will get
strange segmentation faults - that occur somewhere in PHP (not in the
extension itself).

I tried everything - from changing the name of the .so to changing all
function names, to changing everything in zend_module_info etc.

But I still got crashes, when using both modules at the same time (not
in same request, but on the same webserver). What else could cause this
problem? I even would expect that an extension will be unloaded after a
request, and that it will only be loaded in the next request.

Maybe the module won't be correctly unloaded and causes a crash when
trying to load the other module?

Anyone had similar experiences ?


Thanks,
Robert Frunzke