Function PyArray_FillObjectArray

numpy/core/src/multiarray/refcount.c:361–398

NUMPY_API * Assumes contiguous */

 * Assumes contiguous
 */
NPY_NO_EXPORT void
PyArray_FillObjectArray(PyArrayObject *arr, PyObject *obj)
{
    PyArray_Descr* descr = PyArray_DESCR(arr);

    // non-legacy dtypes are responsible for initializing
    // their own internal references
    if (!NPY_DT_is_legacy(NPY_DTYPE(descr))) {
        return;
    }

    npy_intp i,n;
    n = PyArray_SIZE(arr);
    if (descr->type_num == NPY_OBJECT) {
        PyObject **optr;
        optr = (PyObject **)(PyArray_DATA(arr));
        n = PyArray_SIZE(arr);
        if (obj == NULL) {
            for (i = 0; i < n; i++) {
                *optr++ = NULL;
            }
        }
        else {
            for (i = 0; i < n; i++) {
                Py_INCREF(obj);
                *optr++ = obj;
            }
        }
    }
    else {
        char *optr;
        optr = PyArray_DATA(arr);
        for (i = 0; i < n; i++) {
            _fillobject(optr, obj, descr);
            optr += descr->elsize;
        }
    }
}

static void
_fillobject(char *optr, PyObject *obj, PyArray_Descr *dtype)