mirror of https://github.com/python/cpython
94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
// gh-91321: Very basic C++ test extension to check that the Python C API is
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// compatible with C++ and does not emit C++ compiler warnings.
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// Always enable assertions
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#undef NDEBUG
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#include "Python.h"
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PyDoc_STRVAR(_testcppext_add_doc,
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"add(x, y)\n"
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"\n"
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"Return the sum of two integers: x + y.");
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static PyObject *
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_testcppext_add(PyObject *Py_UNUSED(module), PyObject *args)
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{
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long i, j;
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if (!PyArg_ParseTuple(args, "ll:foo", &i, &j)) {
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return nullptr;
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}
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long res = i + j;
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return PyLong_FromLong(res);
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}
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static PyObject *
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test_api_casts(PyObject *Py_UNUSED(module), PyObject *Py_UNUSED(args))
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{
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PyObject *obj = Py_BuildValue("(ii)", 1, 2);
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if (obj == nullptr) {
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return nullptr;
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}
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// gh-92138: For backward compatibility, functions of Python C API accepts
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// "const PyObject*". Check that using it does not emit C++ compiler
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// warnings.
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const PyObject *const_obj = obj;
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Py_INCREF(const_obj);
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Py_DECREF(const_obj);
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PyTypeObject *type = Py_TYPE(const_obj);
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assert(Py_REFCNT(const_obj) >= 1);
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assert(type == &PyTuple_Type);
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assert(PyTuple_GET_SIZE(const_obj) == 2);
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PyObject *one = PyTuple_GET_ITEM(const_obj, 0);
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assert(PyLong_AsLong(one) == 1);
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Py_DECREF(obj);
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Py_RETURN_NONE;
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}
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static PyMethodDef _testcppext_methods[] = {
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{"add", _testcppext_add, METH_VARARGS, _testcppext_add_doc},
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{"test_api_casts", test_api_casts, METH_NOARGS, nullptr},
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{nullptr, nullptr, 0, nullptr} /* sentinel */
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};
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static int
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_testcppext_exec(PyObject *module)
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{
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if (PyModule_AddIntMacro(module, __cplusplus) < 0) {
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return -1;
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}
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return 0;
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}
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static PyModuleDef_Slot _testcppext_slots[] = {
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{Py_mod_exec, reinterpret_cast<void*>(_testcppext_exec)},
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{0, nullptr}
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};
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PyDoc_STRVAR(_testcppext_doc, "C++ test extension.");
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static struct PyModuleDef _testcppext_module = {
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PyModuleDef_HEAD_INIT, // m_base
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"_testcppext", // m_name
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_testcppext_doc, // m_doc
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0, // m_size
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_testcppext_methods, // m_methods
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_testcppext_slots, // m_slots
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nullptr, // m_traverse
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nullptr, // m_clear
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nullptr, // m_free
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};
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PyMODINIT_FUNC
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PyInit__testcppext(void)
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{
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return PyModuleDef_Init(&_testcppext_module);
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}
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