TYPEMAP
kcp_t *    T_PTROBJ_KCP
IUINT32    T_UV

INPUT
T_PTROBJ_KCP
    if (sv_derived_from($arg, \"KCP\"))
    {
        IV tmp = SvIV((SV*)SvRV($arg));
        $var = ($type) tmp;
    }
    else
    {
        croak(\"$var is not of type KCP\");
    }


OUTPUT
T_PTROBJ_KCP
    sv_setref_pv($arg, \"KCP\", (void*)$var);