技术咨询：modifyEvent提示Invalid argument

[HalcyonHuang]

你好，我用的 ZLToolKit/tests/test_tcpClient.cpp的demo，连接tcp服务时，modifyEvent 函数 提示 Invalid argument，请问这种情况正常吗

git commit ：04d1c47d2568f5ce1ff84260cefaf2754e514a5e

2024-04-18 10:52:38.787 D [test_tcpClient] [17486-stamp thread] util.cpp:366 operator() | Stamp thread started
2024-04-18 10:52:38.789 I [test_tcpClient] [17486-test_tcpClient] EventPoller.cpp:503 EventPollerPool | EventPoller created size: 2
2024-04-18 10:52:38.789 D [test_tcpClient] [17486-test_tcpClient] test_tcpClient.cpp:22 TestClient | 
2024-04-18 10:52:38.790 T [test_tcpClient] [17486-test_tcpClient] TcpClient.cpp:79 startConnect | TestClient-1 start connect 192.168.0.120:8082
2024-04-18 10:52:38.791 I [test_tcpClient] [17486-event poller 1] Socket.cpp:238 attachEvent | attachEvent rawFd 9 type0
2024-04-18 10:52:38.792 T [test_tcpClient] [17486-event poller 1] TcpClient.cpp:89 onSockConnect | TestClient-1 connect result: 0(success)
2024-04-18 10:52:38.792 I [test_tcpClient] [17486-event poller 1] test_tcpClient.cpp:30 onConnect | success
2024-04-18 10:52:38.792 E [test_tcpClient] [17486-event poller 1] Socket.cpp:262 operator() |  Event_Write rawFd 9 events 2
2024-04-18 10:52:38.792 E [test_tcpClient] [17486-event poller 1] EventPoller.cpp:184 modifyEvent |  stop write event error _epoll_fd 8 fd 9 events 5 ret -1 Invalid argument //错误提示

bool Socket::attachEvent(const SockNum::Ptr &sock) {
    weak_ptr<Socket> weak_self = shared_from_this();
    InfoL << "attachEvent rawFd " << sock->rawFd() << " type" << sock->type();
    if (sock->type() == SockNum::Sock_TCP_Server) {
        // tcp服务器
        auto result = _poller->addEvent(sock->rawFd(), EventPoller::Event_Read | EventPoller::Event_Error, [weak_self, sock](int event) {
            if (auto strong_self = weak_self.lock()) {
                strong_self->onAccept(sock, event);
            }
        });
        return -1 != result;
    }

    // tcp客户端或udp
    auto read_buffer = _poller->getSharedBuffer();
    auto result = _poller->addEvent(sock->rawFd(), EventPoller::Event_Read | EventPoller::Event_Error | EventPoller::Event_Write, [weak_self, sock, read_buffer](int event) {
        auto strong_self = weak_self.lock();
        if (!strong_self) {
            return;
        }

        if (event & EventPoller::Event_Read) {       
            ErrorL << " Event_Read rawFd "   << sock->rawFd() << " events " << event  ;//新增打印
            strong_self->onRead(sock, read_buffer);
        }
        if (event & EventPoller::Event_Write) {
            ErrorL << " Event_Write rawFd "   << sock->rawFd() << " events " << event  ;//新增打印
            strong_self->onWriteAble(sock);
        }
        if (event & EventPoller::Event_Error) { 
            ErrorL << " Event_Error rawFd "   << sock->rawFd() << " events " << event  ;//新增打印
            strong_self->emitErr(getSockErr(sock->rawFd()));
        }
    });

    return -1 != result;
}

int EventPoller::modifyEvent(int fd, int event, PollCompleteCB cb) {
    TimeTicker();
    if (!cb) {
        cb = [](bool success) {};
    }
    if (isCurrentThread()) {
#if defined(HAS_EPOLL)
        struct epoll_event ev = { 0 };
        ev.events = toEpoll(event);
        ev.data.fd = fd;
        auto ret = epoll_ctl(_epoll_fd, EPOLL_CTL_MOD, fd, &ev);
        if(ret !=0){ //新增打印
            ErrorL << " stop write event error _epoll_fd " << _epoll_fd << " fd " << fd << " events " << event << " ret " << ret << " " << strerror(errno);
        }
        cb(ret == 0);
        return ret;
#else
 
#endif // HAS_EPOLL
    }
 
    return 0;
}

[xia-chu]

应该没啥问题 这个fd可能已经被关闭了 不用理会

[HalcyonHuang]

我也觉得奇怪，可能是我哪里没搞对吧。
@xia-chu fd 是指tcp客户端的socket吗，tcp客户端的socket没有关闭，接收到tcp服务器发来的数据，会同时触发读和写事件,日志如下：

2024-04-19 18:27:28.602 D [test_tcpClient] [89747-stamp thread] util.cpp:366 operator() | Stamp thread started
2024-04-19 18:27:28.604 I [test_tcpClient] [89747-test_tcpClient] EventPoller.cpp:507 EventPollerPool | EventPoller created size: 2
2024-04-19 18:27:28.604 D [test_tcpClient] [89747-test_tcpClient] test_tcpClient.cpp:22 TestClient | 
2024-04-19 18:27:28.604 T [test_tcpClient] [89747-test_tcpClient] TcpClient.cpp:79 startConnect | TestClient-1 start connect 192.168.0.120:8082
2024-04-19 18:27:28.605 I [test_tcpClient] [89747-event poller 1] Socket.cpp:238 attachEvent | attachEvent rawFd 9 type0
2024-04-19 18:27:28.605 T [test_tcpClient] [89747-event poller 1] TcpClient.cpp:89 onSockConnect | TestClient-1 connect result: 0(success)
2024-04-19 18:27:28.605 I [test_tcpClient] [89747-event poller 1] test_tcpClient.cpp:30 onConnect | success
2024-04-19 18:27:28.605 E [test_tcpClient] [89747-event poller 1] Socket.cpp:262 operator() |  Event_Write rawFd 9 events 2
2024-04-19 18:27:28.605 E [test_tcpClient] [89747-event poller 1] EventPoller.cpp:188 modifyEvent |  stop write event error _epoll_fd 8 fd 9 events 5 ret -1 Invalid argument

接收到服务器发送的数据：
2024-04-19 18:27:43.562 E [test_tcpClient] [89747-event poller 1] Socket.cpp:258 operator() |  Event_Read rawFd 9 events 3
2024-04-19 18:27:43.563 D [test_tcpClient] [89747-event poller 1] test_tcpClient.cpp:34 onRecv | 123 from port:8082
2024-04-19 18:27:43.563 E [test_tcpClient] [89747-event poller 1] Socket.cpp:262 operator() |  Event_Write rawFd 9 events 3
2024-04-19 18:27:43.563 E [test_tcpClient] [89747-event poller 1] EventPoller.cpp:188 modifyEvent |  stop write event error _epoll_fd 8 fd 9 events 5 ret -1 Invalid argument