FD_SET            423 include/ruby/win32.h #undef FD_SET
FD_SET            424 include/ruby/win32.h #define FD_SET(f, s)		rb_w32_fdset(f, s)
FD_SET           2243 thread.c       #undef FD_SET
FD_SET           2248 thread.c       #define FD_SET(i, f)	rb_fd_set(i, f)
FD_SET           2289 thread.c       #undef FD_SET
FD_SET           2294 thread.c       #define FD_SET(i, f)	rb_fd_set(i, f)
FD_SET           1962 win32/win32.c  #undef FD_SET