About How to Support EPOLLET Issue in ST

[huguanghui]

In the usage scenario, it is necessary to change the trigger of EPOLL to EPOLLET. It is normal to directly call the native interface in the system. However, direct modification in ST is invalid. The modifications are as follows.

        if (events != old_events) {
            op = old_events ? EPOLL_CTL_MOD : EPOLL_CTL_ADD;
            ev.events = events | EPOLLET;
            ev.data.fd = fd;
            if (epoll_ctl(_st_epoll_data->epfd, op, fd, &ev) < 0 && (op != EPOLL_CTL_ADD || errno != EEXIST))
                break;
            if (op == EPOLL_CTL_ADD) {
                _st_epoll_data->evtlist_cnt++;
                if (_st_epoll_data->evtlist_cnt > _st_epoll_data->evtlist_size)
                    _st_epoll_evtlist_expand();
            }
        }

TRANS_BY_GPT4