80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
#include "Python.h"
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typedef struct {
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PyObject_HEAD
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PyObject *container;
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} MyObject;
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static int
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my_traverse(MyObject *self, visitproc visit, void *arg)
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{
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if (self->container != NULL)
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return visit(self->container, arg);
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else
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return 0;
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}
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static int
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my_clear(MyObject *self)
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{
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Py_XDECREF(self->container);
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self->container = NULL;
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return 0;
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}
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static void
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my_dealloc(MyObject *self)
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{
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PyObject_GC_UnTrack((PyObject *) self);
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Py_XDECREF(self->container);
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PyObject_GC_Del(self);
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}
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static PyTypeObject
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MyObject_Type = {
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PyObject_HEAD_INIT(NULL)
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0,
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"MyObject",
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sizeof(MyObject),
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0,
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(destructor)my_dealloc, /* tp_dealloc */
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0, /* tp_print */
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0, /* tp_getattr */
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0, /* tp_setattr */
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0, /* tp_compare */
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0, /* tp_repr */
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0, /* tp_as_number */
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0, /* tp_as_sequence */
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0, /* tp_as_mapping */
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0, /* tp_hash */
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0, /* tp_call */
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0, /* tp_str */
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0, /* tp_getattro */
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0, /* tp_setattro */
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0, /* tp_as_buffer */
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Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
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0, /* tp_doc */
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(traverseproc)my_traverse, /* tp_traverse */
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(inquiry)my_clear, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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};
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/* This constructor should be made accessible from Python. */
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static PyObject *
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new_object(PyObject *unused, PyObject *args)
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{
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PyObject *container = NULL;
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MyObject *result = NULL;
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if (PyArg_ParseTuple(args, "|O:new_object", &container)) {
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result = PyObject_GC_New(MyObject, &MyObject_Type);
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if (result != NULL) {
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result->container = container;
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PyObject_GC_Track(result);
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}
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}
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return (PyObject *) result;
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}
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