rb_w32_getsockopt  250 include/ruby/win32.h extern int    WSAAPI rb_w32_getsockopt(int, int, int, char *, int *);
rb_w32_getsockopt  641 include/ruby/win32.h #define getsockopt(s, v, n, o, l) rb_w32_getsockopt(s, v, n, o, l)