Sorry about the double post...
anyhow, after putting in debug statements I found that it was crashing
when it called, free(result)....so I removed the free(result).
now it crashes when it gets to, b = GetVal(bString, count(bString,
","));
..any ideas?
Java and Swing wrote:
> Antoon,
> I just saw that to. I updated the code like so...
>
> 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 *) PyMem_Malloc((20 * sizeof(MY_NUM) + 1); //
> the array will be 20 long
> MY_NUM *b = (MY_NUM *) PyMem_Malloc((20 * sizeof(MY_NUM) + 1); //
> the array will be 20 long
> 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 MY_NUM * (a pointer
> to a MY_NUM array)
> 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(a);
> PyMem_Free(b);
> free(aString);
> free(bString);
> free(result);
>
> // return the result as a Python string
> return finalResult;
> }
>
> ..as you can see, i malloc'ed memory, and free'd the memory. However,
> I still have python crashing (after only 3 successful calls to
> doStuff). And yes, doStuff is a plain C function...nothing related to
> Python.
>
>
> Antoon Pardon wrote:
> > 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
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