rb_fd_clr 315 include/ruby/intern.h void rb_fd_clr(int, rb_fdset_t *); rb_fd_clr 3566 thread.c #define FD_CLR(i, f) rb_fd_clr((i), (f)) rb_fd_clr 3619 thread.c #define FD_CLR(i, f) rb_fd_clr((i), (f))