mirror of https://github.com/python/cpython
68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
#define PY_SSIZE_T_CLEAN
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#include <Python.h>
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typedef struct {
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PyListObject list;
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int state;
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} SubListObject;
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static PyObject *
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SubList_increment(SubListObject *self, PyObject *unused)
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{
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self->state++;
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return PyLong_FromLong(self->state);
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}
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static PyMethodDef SubList_methods[] = {
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{"increment", (PyCFunction) SubList_increment, METH_NOARGS,
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PyDoc_STR("increment state counter")},
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{NULL},
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};
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static int
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SubList_init(SubListObject *self, PyObject *args, PyObject *kwds)
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{
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if (PyList_Type.tp_init((PyObject *) self, args, kwds) < 0)
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return -1;
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self->state = 0;
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return 0;
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}
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static PyTypeObject SubListType = {
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PyVarObject_HEAD_INIT(NULL, 0)
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.tp_name = "sublist.SubList",
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.tp_doc = PyDoc_STR("SubList objects"),
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.tp_basicsize = sizeof(SubListObject),
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.tp_itemsize = 0,
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.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
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.tp_init = (initproc) SubList_init,
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.tp_methods = SubList_methods,
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};
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static PyModuleDef sublistmodule = {
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PyModuleDef_HEAD_INIT,
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.m_name = "sublist",
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.m_doc = "Example module that creates an extension type.",
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.m_size = -1,
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};
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PyMODINIT_FUNC
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PyInit_sublist(void)
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{
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PyObject *m;
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SubListType.tp_base = &PyList_Type;
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if (PyType_Ready(&SubListType) < 0)
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return NULL;
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m = PyModule_Create(&sublistmodule);
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if (m == NULL)
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return NULL;
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if (PyModule_AddObjectRef(m, "SubList", (PyObject *) &SubListType) < 0) {
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Py_DECREF(m);
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return NULL;
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}
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return m;
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}
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