ioctlsocket       454 include/ruby/win32.h #undef ioctlsocket
ioctlsocket       455 include/ruby/win32.h #define ioctlsocket(s, c, a)	rb_w32_ioctlsocket(s, c, a)
ioctlsocket      2460 win32/win32.c  #undef ioctlsocket