Function array_shares_memory_impl

numpy/core/src/multiarray/multiarraymodule.c:4324–4438

static PyObject *
array_shares_memory_impl(PyObject *args, PyObject *kwds, Py_ssize_t default_max_work,
                         int raise_exceptions)
{
    PyObject * self_obj = NULL;
    PyObject * other_obj = NULL;
    PyArrayObject * self = NULL;
    PyArrayObject * other = NULL;
    PyObject *max_work_obj = NULL;
    static char *kwlist[] = {"self", "other", "max_work", NULL};

    mem_overlap_t result;
    Py_ssize_t max_work;
    NPY_BEGIN_THREADS_DEF;

    max_work = default_max_work;

    if (!PyArg_ParseTupleAndKeywords(args, kwds, "OO|O:shares_memory_impl", kwlist,
                                     &self_obj, &other_obj, &max_work_obj)) {
        return NULL;
    }

    if (PyArray_Check(self_obj)) {
        self = (PyArrayObject*)self_obj;
        Py_INCREF(self);
    }
    else {
        /* Use FromAny to enable checking overlap for objects exposing array
           interfaces etc. */
        self = (PyArrayObject*)PyArray_FROM_O(self_obj);
        if (self == NULL) {
            goto fail;
        }
    }

    if (PyArray_Check(other_obj)) {
        other = (PyArrayObject*)other_obj;
        Py_INCREF(other);
    }
    else {
        other = (PyArrayObject*)PyArray_FROM_O(other_obj);
        if (other == NULL) {
            goto fail;
        }
    }

    if (max_work_obj == NULL || max_work_obj == Py_None) {
        /* noop */
    }
    else if (PyLong_Check(max_work_obj)) {
        max_work = PyLong_AsSsize_t(max_work_obj);
        if (PyErr_Occurred()) {
            goto fail;
        }
    }
    else {
        PyErr_SetString(PyExc_ValueError, "max_work must be an integer");
        goto fail;