[OpenSIPS-Users] python module - bug and questions

[Bogdan-Andrei Iancu]

Hi Robert,

The only question I can answer is 1) - OpenSIPS it is a multi-process 
application (and not using threads).

How the python module is design (from threading perspective), I do not 
know - maybe Maxim, the author of this module can help with this.

Regards,

Bogdan-Andrei Iancu
   OpenSIPS Founder and Developer
   http://www.opensips-solutions.com

OpenSIPS Summit May 2017 Amsterdam
   http://www.opensips.org/events/Summit-2017Amsterdam.html

On 04/19/2017 08:43 PM, Mundkowsky, Robert wrote:
>
> Hi,
>
> This email should likely go to your other dev forum, but I don’t have 
> access yet.
>
> I am using openSIPS 2.2.3 on Ubuntu 16.04.2 LTS.
>
> I am using the python module.  The python script called works fine 
> when called from outside openSIPS and it works fine when called inside 
> openSIPS, if it is triggered once at a time.
>
> But if the python script is triggered twice by two phone calls or more 
> or even one call after another in short order, then there are weird 
> errors which show up in different places in the code like:
>
> ERROR:python:python_handle_exception: #011TypeError: an integer is 
> required
>
> I am guessing the openSIP python module has some problem/s related to 
> threading.
>
> Questions:
>
> 1)I am guessing that OpenSIPS uses a multi-threaded architecture?
>
> 2)Is the python module meant to be a single thread? Or multi-threaded?
>
> a.If it is meant to be single threaded then why use python library 
> thread functions? Just use python library without multi-threaded stuff.
>
> b.If it is meant to be multi-threaded then why is there only one call 
> to PyThreadState_New and myThreadState is a global used everywhere?
>
> i.I would think a thread per call to python_exec would make more sense 
> and make the code easier to understand?
>
> 3)Also why is there no clean up code (PyThreadState_Clear, 
> PyThreadState_Delete, Py_Finalize)?
>
> a.I am guessing the idea is you do not need clean up, because it only 
> happens when openSIPS is turned off.
>
> Robert
>
> For reference:
>
> https://www.codeproject.com/articles/11805/embedding-python-in-c-c-part-i
>
> http://www.awasu.com/weblog/embedding-python/threads/
>
> http://stackoverflow.com/questions/26061298/python-multi-thread-multi-interpreter-c-api
>
>
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