rb_w32_fdclr      232 include/ruby/intern.h #define rb_fd_clr(n, f)		rb_w32_fdclr(n, (f)->fdset)
rb_w32_fdclr      215 include/ruby/win32.h extern void   rb_w32_fdclr(int, fd_set*);
rb_w32_fdclr      427 include/ruby/win32.h #define FD_CLR(f, s)		rb_w32_fdclr(f, s)