FD_SET            591 include/ruby/win32.h #undef FD_SET
FD_SET            592 include/ruby/win32.h #define FD_SET(fd, set)	do {\
FD_SET           3560 thread.c       #undef FD_SET
FD_SET           3565 thread.c       #define FD_SET(i, f)	rb_fd_set((i), (f))
FD_SET           3613 thread.c       #undef FD_SET
FD_SET           3618 thread.c       #define FD_SET(i, f)	rb_fd_set((i), (f))