ioinfo           1697 win32/win32.c  EXTERN_C _CRTIMP ioinfo * __pioinfo[];
ioinfo           1701 win32/win32.c  #define _pioinfo(i)	((ioinfo*)((char*)(__pioinfo[i >> IOINFO_L2E]) + (i & (IOINFO_ARRAY_ELTS - 1)) * (sizeof(ioinfo) + pioinfo_extra)))