rb_fd_clr         337 include/ruby/intern.h #define rb_fd_clr(n, f)		rb_w32_fdclr((n), (f)->fdset)
rb_fd_clr         354 include/ruby/intern.h #define rb_fd_clr(n, f)	FD_CLR((n), (f))
rb_fd_clr        3495 thread.c       rb_fd_clr(int n, rb_fdset_t *fds)