static ALLOCATOR_PROC_SIGNATURE(un_std_alloc_proc) {
    UNUSED(data);

    switch (message) {
        case UN_ALLOC_MSG_ALLOCATE:
            return calloc(1, size);
        case UN_ALLOC_MSG_FREE:
            free(p);
            break;
        case UN_ALLOC_MSG_SELF_DELETE: break;
    }

    return NULL;
}