rb_fd_zero        313 include/ruby/intern.h void rb_fd_zero(rb_fdset_t *);
rb_fd_zero       10141 io.c           	rb_fd_zero(&stp->fds);
rb_fd_zero       10164 io.c           	rb_fd_zero(&stp->fds);
rb_fd_zero       3564 thread.c       #define FD_ZERO(f)	rb_fd_zero(f)
rb_fd_zero       3617 thread.c       #define FD_ZERO(f)	rb_fd_zero(f)