CODEWITHSUNDEEP
cpython-3.xextension-methods
gjivanya
gjivanya

Reputation: 589

How to parse void* to PyObject

I want to write a wrapper for my C function as I want to call it from python code.So my wrapper function is 

static PyObject* my_func_wrapper(PyObject *self, PyObject *args) 
{
    PyObject* obj_Ptr = my_func(); 
    return Py_BuildValue('O', obj_Ptr);
}

My C my_func() has no params, and return MyClass pointer converted to (void *).

When I run my setup.py script I'm getting this 

warning: passing argument 1 of ‘Py_BuildValue’ makes pointer from integer without a cast [-Wint-conversion]
 Py_BuildValue('O', obj_Ptr);

and when I call my_func_wrapper from python I'm getting Seg.Fault Error in return line.

How can I fix this?

Thanks.

Upvotes: 0

Views: 577

Answers (1)

jaudo
jaudo

Reputation: 2122

Here is the prototype of Py_BuildValue:

PyObject *Py_BuildValue(char *format, ...);

So the first argument should be "O" and not 'O'.

I'm not sure about you second arg either : you are using my_func() result instead of getting a pointer to this function.

Upvotes: 1

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