81   int success = epoll_ctl(epoll_fd_->fd_, EPOLL_CTL_ADD, fd->fd_, &event);  in Add()  local
82   if (success != 0 && errno == EEXIST) {  in Add()
85   } else if (success != 0) {  in Add()
102   int success = epoll_ctl(epoll_fd_->fd_, operation, fd->fd_, &event);  in AddOrModify()  local
103   if (success != 0) {  in AddOrModify()
123   int success = epoll_ctl(epoll_fd_->fd_, EPOLL_CTL_MOD, fd->fd_, &event);  in Modify()  local
124   if (success != 0) {  in Modify()
139   int success = epoll_ctl(epoll_fd_->fd_, EPOLL_CTL_DEL, fd->fd_, nullptr);  in Delete()  local
140   if (success != 0) {  in Delete()
149   int success;  in Wait()  local
153     success = TEMP_FAILURE_RETRY(epoll_wait(epoll_fd_->fd_, &event, 1, -1));  in Wait()
155   if (success == -1) {  in Wait()
157   } else if (success == 0) {  in Wait()
159   } else if (success != 1) {  in Wait()