Question

SWIG has support for including code that is executed when loading a module, as follows:

%init %{
    init_variables();
%}

Does something similar also exist for finalization? I can not find any documentation on it, maybe there is another good way to achieve the same thing for finalization?

Answer 1

You could register an atexit cleanup routine during %init. Here’s a working sample:

%module sample

%{
#include <stdlib.h>
#include <stdio.h>

void cleanup()
{
    printf("cleanup!\n");
}
%}

%init %{
    atexit(cleanup);
%}

Result:

Python 3.3.0 (v3.3.0:bd8afb90ebf2, Sep 29 2012, 10:57:17) [MSC v.1600 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sample
>>> ^Z

cleanup!