SV *perinterp_sv = *hv_fetch(PL_modglobal,
    MY_VERSION, sizeof(MY_VERSION)-1, TRUE);
stcxt_t * cxt = ((perinterp_sv && SvIOK(perinterp_sv) && SvIVX(perinterp_sv)
    ? (stcxt_t *)SvPVX(SvRV(INT2PTR(SV*,SvIVX(perinterp_sv)))) : (stcxt_t *) 0));