Function PyArray_XDECREF

numpy/core/src/multiarray/refcount.c:304–351

NUMPY_API Decrement all internal references for object arrays. (or arrays with object fields) The use of this function is strongly discouraged, within NumPy use PyArray_Clear, which DECREF's and sets everything to NULL and can work with any dtype. */

  work with any dtype.
*/
NPY_NO_EXPORT int
PyArray_XDECREF(PyArrayObject *mp)
{
    npy_intp i, n;
    PyObject **data;
    PyObject *temp;
    /*
     * statically allocating it allows this function to not modify the
     * reference count of the array for use during dealloc.
     * (statically is not necessary as such)
     */
    PyArrayIterObject it;

    if (!PyDataType_REFCHK(PyArray_DESCR(mp))) {
        return 0;
    }
    if (PyArray_DESCR(mp)->type_num != NPY_OBJECT) {
        PyArray_RawIterBaseInit(&it, mp);
        while(it.index < it.size) {
            PyArray_Item_XDECREF(it.dataptr, PyArray_DESCR(mp));
            PyArray_ITER_NEXT(&it);
        }
        return 0;
    }

    if (PyArray_ISONESEGMENT(mp)) {
        data = (PyObject **)PyArray_DATA(mp);
        n = PyArray_SIZE(mp);
        if (PyArray_ISALIGNED(mp)) {
            for (i = 0; i < n; i++, data++) Py_XDECREF(*data);
        }
        else {
            for (i = 0; i < n; i++, data++) {
                memcpy(&temp, data, sizeof(temp));
                Py_XDECREF(temp);
            }
        }
    }
    else { /* handles misaligned data too */
        PyArray_RawIterBaseInit(&it, mp);
        while(it.index < it.size) {
            memcpy(&temp, it.dataptr, sizeof(temp));
            Py_XDECREF(temp);
            PyArray_ITER_NEXT(&it);
        }
    }
    return 0;
}


static void