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// An entirely different mechanism for handling a callback
%module callback
%{
typedef void (*CALLBACK)(void);
%}
%include foo.c
%{
static PyObject *my_pycallback = NULL;
static void PythonCallBack(void)
{
PyObject *func, *arglist;
PyObject *result;
func = my_pycallback; /* This is the function .... */
arglist = Py_BuildValue("()"); /* No arguments needed */
result = PyEval_CallObject(func, arglist);
Py_DECREF(arglist);
Py_XDECREF(result);
return /*void*/;
}
void
my_set_callback(PyObject *PyFunc)
{
Py_XDECREF(my_pycallback); /* Dispose of previous callback */
Py_XINCREF(PyFunc); /* Add a reference to new callback */
my_pycallback = PyFunc; /* Remember new callback */
set_callback(PythonCallBack);
}
%}
%typemap(python,in) PyObject *PyFunc {
if (!PyCallable_Check($source)) {
PyErr_SetString(PyExc_TypeError, "Need a callable object!");
return NULL;
}
$target = $source;
}
void my_set_callback(PyObject *PyFunc);
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