Consider this mcve:
mcve.h
#pragma once
#include <windows.h>
class Windows {
public:
static HWND GetActiveWindow();
static HWND GetForegroundWindow();
};
mcve.cpp
#include "mcve.h"
HWND Windows::GetActiveWindow() {
return ::GetActiveWindow();
}
HWND Windows::GetForegroundWindow() {
return ::GetForegroundWindow();
}
mcve.i
%module mcve
%include <std_string.i>
%include <std_vector.i>
%include <typemaps.i>
%include <windows.i>
%include <cpointer.i>
%include <carrays.i>
%{
#include "mcve.h"
%}
%include "mcve.h"
setup.py
from distutils.core import Extension
from distutils.core import setup
setup(
name="mcve",
ext_modules=[
Extension(
"_mcve",
sources=["mcve.i", "mcve.cpp", "mcve_wrap.cpp"],
swig_opts=["-c++", "-python"],
include_dirs=["."],
library_dirs=[
"D:/software/vcpkg/installed/x86-windows/lib"
],
libraries=["user32"]
)
],
py_modules=["mcve"],
)
In order to run it, make sure you adjust properly the library_dirs
variable and then just type:
python setup.py build_ext --inplace
If the extension has been generated succesfully then you just run python test.py
and you should see an output similar to this:
>python test.py
swig/python detected a memory leak of type 'HWND *', no destructor found.
swig/python detected a memory leak of type 'HWND *', no destructor found.
I know you can use swig -nodefaultdtor
to not generate implicit default destructors, I've tried and that didn't make any difference.
For the sake of completeness, here's roughly how the HWND typedefs would look like:
typedef PVOID HANDLE;
typedef HANDLE HWND;
typedef void *PVOID;
QUESTION: What's the proper way in swig to prevent that memory leak of HWND?
from How to fix "swig/python detected a memory leak of type 'HWND *', no destructor found"?
No comments:
Post a Comment