Op 2005-10-12, Java and Swing schreef <[EMAIL PROTECTED]>:
> static PyObject *wrap_doStuff(PyObject *self, PyObject *args) {
> // this will store the result in a Python object
> PyObject *finalResult;
>
> // get arguments from Python
> char *result = 0;
> char *in= 0;
> char *aString = 0;
> char *bString = 0;
> MY_NUM *a;
> MY_NUM *b;
> int ok = PyArg_ParseTuple(args, "sss", &in, &aString, &bString);
> if (!ok) return 0;
>
> // do work to get a and b
> // count - returns an int; GetVal - returns a char *
> a = GetVal(aString, count(aString, ","));
> b = GetVal(bString, count(bString, ","));
>
> // make function call, which returns a char *
> result = doStuff(in, a, b);
>
> // save result in Python string
> finalResult = PyString_FromString(result);
>
> // free memory
> PyMem_Free(result);
> PyMem_Free(a);
> PyMem_Free(b);
>
> // return the result as a Python string
> return finalResult;
> }
>
> ...from python I can call this function 4 times...works fine. WHen I
> call it for the fifth time python.exe crashes. im thinking some memory
> problem in the wrapper function perhaps...but I am not sure. The
> actually C function, doStuff can be called 5, 6,7...N times without a
> problem
> so i know its gotta be my wrapper.
>
> Any ideas? Thanks!
Well assuming your doStuff is a C function that knows nothing of python.
it might be the PyMem_Free(result).
http://docs.python.org/api/memoryInterface.html says the following:
void PyMem_Free(void *p)
Frees the memory block pointed to by p, which must have been
returned by a previous call to PyMem_Malloc() or PyMem_Realloc().
Otherwise, or if PyMem_Free(p) has been called before, undefined
behavior occurs. If p is NULL, no operation is performed.
But your result wasn't allocated by a PyMem_Malloc, it was returned
to you by a C function.
--
Antoon Pardon
--
http://mail.python.org/mailman/listinfo/python-list
