Re: Multi-threaded wrapping

On Mon, 12 Sept 2022 at 18:55, Rob McDonald <[email protected]>
wrote:

> I have a C++ application with an event driven GUI (using FLTK) that is
> currently wrapped with Swig for Python.
>
> I can make calls (with no GUI loaded) to the exposed API.  I can also
> launch the GUI from Python (and FLTK event loop) and interact with the
> graphical program for a while -- when satisfied, I can terminate the event
> loop to return control to Python.
>
> I would like to be able to leave the application GUI active (event loop
> still running) and return control to Python.  The Python side might
> actually be a separate GUI with its own event loop.  The two loops will
> need to communicate occasionally -- I can likely initiate all communication
> from the Python side.
>
> I believe I will need to run Swig with the 'threads' option.  I also need
> to set up some sort of lock so the C++ event loop pauses when the C++ API
> is responding to a request from the Python side.
>
> Can anyone give any pointers on how to achieve this?  Are there any
> examples of this available online?
>
>
There is an example of the 'threads' option in the SWIG test-suite. See
https://github.com/swig/swig/blob/master/Examples/test-suite/python_threads.i
with associated runtime test
https://github.com/swig/swig/blob/master/Examples/test-suite/python/python_threads_runme.py.
That's all I can find.

William

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