How to create a python extension module from a shared library?

[Etienne Robillard]

Here's my ffi_build.py script: 
https://bitbucket.org/tkadm30/libuwsgictl/src/956f6ca24f9111c1d8b3ce90cf17173a6e5ae3e2/ffi_build.py?at=default&fileviewer=file-view-default

Not really sure how to preprocess the uwsgi.h header with clang.cindex 
in cffi.

I can load the shared lib with :

>>> lib  =  clang.cindex.cdll.LoadLibrary(c_lib)

Any ideas how to compile lib into a python extension module with cffi?


Etienne

Le 2018-01-02 à 05:17, Etienne Robillard a écrit :
> Hi James,
>
> Thanks for your input.
>
> I want to make a native Python application (uwsgictl) to dispatch FIFO 
> commands to the master uWSGI process.
>
> uwsgictl would depend on libuwsgi.so, a uWSGI plugin included in the 
> distribution.
>
> My goal is to use CFFI to generate python bindings for libuwsgi.so 
> using clang interpreter. :)
>
>
> Best regards,
>
> Etienne
>
>
> Le 2018-01-02 à 05:06, James Chapman a écrit :
>> Hi Etienne,
>>
>> I'm not familiar with uSWGI, so I started here: 
>> https://uwsgi-docs.readthedocs.io/en/latest/Hooks.html
>> AFAIK there are a number of hooks already exposed and available to 
>> Python apps.
>>
>> However, if I've understood your question correctly, you want to 
>> extend uWSGI itself by writing some python code which is then 
>> translated/generated into C code? You refer to AST generation but why 
>> are you doing this? Maybe my unfamiliarity with uWSGI is preventing 
>> me from understanding exactly what it is you are trying to do, but 
>> further clarification would go a long way.
>>
>> If your goal is actually to extend uWSGI via a plugin, then there's 
>> more to just writing some python, you'll need to write some C code (I 
>> wouldn't bother trying to generate this as it'll probably not work):
>> https://github.com/unbit/uwsgi-docs/blob/master/tutorials/WritingPlugins.rst 
>>
>>
>> If you look here, there's a link to each 3rd party plugin (mostly 
>> GitHub) where you can see the source code for each plugin. This is a 
>> very good starting point as there are many examples here:
>> https://uwsgi-docs.readthedocs.io/en/latest/ThirdPartyPlugins.html
>>
>> Perhaps you can clarify.
>>
>> James
>>
>>
>>
>>
>> On 30 December 2017 at 01:00, Etienne Robillard <tkadm30 at yandex.com 
>> <mailto:tkadm30 at yandex.com>> wrote:
>>
>>     Hi all,
>>
>>     I would like to extend uWSGI by creating a CPython extension
>>     module for the libuwsgi.so shared library included in the
>>     distribution.
>>
>>     My goal is to use this automatically generated CPython module for
>>     extending uWSGI.
>>
>>
>

-- 
Etienne Robillard
tkadm30 at yandex.com
https://www.isotopesoftware.ca/