[Numpy-discussion] a possible way to implement a plogin system

Lisandro Dalcin dalcinl@gmail....
Wed Apr 30 14:45:57 CDT 2008


Sorry, I forgot to  attach the code...

On 4/30/08, Lisandro Dalcin <dalcinl@gmail.com> wrote:
> David, in order to put clear what I was proposing to you in previous
>  mail regarding to implementing plugin systems for numpy, please take a
>  look at the attached tarball.
>
>  The plugins are in charge of implementing the action of generic foo()
>  and bar() functions in C. The example actually implements two
>  different plugins in Cython. There is also an include file with some
>  support declarations and some macro definitions wrap_foo and wrap_bar
>
>  Next, in mymodule.pyx, I define python side foo() and bar() functions
>  (calling funtins pointers in a struct via the macros wrap_xxx) and a
>  use() for selecting the plugin at runtime.
>
>  Finally, the test.py script is pure python code showing all this in
>  action. If you want to give a try, then install Cython, next do
>  'make', and finally 'python test.py'
>
>  Please note that I've implemented this is Cython just for convenience,
>  it does not actually depend in any special Cython feature, and could
>  be translated to pure C code with Python C/API calls.
>
>  IMHO, this is the easier and cleaner way to deal inside python with
>  plugins written in low-level C. It does not depend explicitely on
>  'dlopen' stuff from your side.
>
>  Now tell me. What is in your mind that this is not general/robust
>  enough as to have to explicitely deal with dlopen? It even works on
>  systems with no dynload, provided that all is put inside the python
>  executable.
>
>
>
>
>  --
>  Lisandro Dalcín
>  ---------------
>  Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
>  Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
>  Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
>  PTLC - Güemes 3450, (3000) Santa Fe, Argentina
>  Tel/Fax: +54-(0)342-451.1594
>


-- 
Lisandro Dalcín
---------------
Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
PTLC - Güemes 3450, (3000) Santa Fe, Argentina
Tel/Fax: +54-(0)342-451.1594
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