hash_key_compare(const void *a, const void *b)
{
    uint64_t ia = (uint64_t)a;
    uint64_t ib = (uint64_t)b;
    return ia == ib;
}
hash_key_compare(const void *a, const void *b)
{
    uint64_t ia = (uint64_t)a;
    uint64_t ib = (uint64_t)b;
    return ia == ib;
}