Graham Dumpleton closed MODPYTHON-150.

> make_obcallback not thread protected
> ------------------------------------
>                 Key: MODPYTHON-150
>                 URL: https://issues.apache.org/jira/browse/MODPYTHON-150
>             Project: mod_python
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.1.4, 3.2.8
>            Reporter: Graham Dumpleton
>         Assigned To: Graham Dumpleton
>             Fix For: 3.3
> In get_interpreter() function of src/mod_python.c the check of whether or not 
> the callback object has been created is not within the bounds of the 
> acquisition of the interpreters lock. As a result, in a multithreaded MPM, 
> although the creation of the interpreter itself is protected so that only one 
> thread will get to create it, multiple threads may decide the need to call 
> make_obcallback().
> In the past this hasn't mattered, but now that apache.init() is doing more 
> complicated things, such as caching parameters as global variables and also 
> doing fiddles with the callback object to allow optional use of new module 
> importer, problems can start to arise.
> To fix the issue the release of the interpreters lock needs to be moved to 
> the end of the get_interpreter() function.

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