c语言实现epoll io复用片段

好的，我可以回答关于C语言实现epoll IO复用的问题。以下是一个基本的epoll IO复用示例代码：

#include <sys/epoll.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h>

#define MAX_EVENTS 10
#define PORT 8080

int main () {
    int server_fd, new_socket, epoll_fd, n, i;
    struct sockaddr_in address;
    struct epoll_event event, events[MAX_EVENTS];

    // Create a socket
    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
        perror("Failed to create socket");
        exit(EXIT_FAILURE);
    }

    // Set socket options
    if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT,
                &opt, sizeof(opt))) {
        perror("Failed to set socket options");
        exit(EXIT_FAILURE);
    }

    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(PORT);

    // Bind the socket to a port
    if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
        perror("Failed to bind socket");
        exit(EXIT_FAILURE);
    }

    // Listen on the socket
    if (listen(server_fd, 3) < 0) {
        perror("Failed to listen on socket");
        exit(EXIT_FAILURE);
    }

    // Create epoll instance
    if ((epoll_fd = epoll_create1(0)) < 0) {
        perror("Failed to create epoll instance");
        exit(EXIT_FAILURE);
    }

    // Add server socket to epoll decriptor
    event.events = EPOLLIN;
    event.data.fd = server_fd;
    if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, server_fd, &event) < 0) {
        perror("Failed to add server socket to epoll");
        exit(EXIT_FAILURE);
    }

    while (1) {
        n = epoll_wait(epoll_fd, events, MAX_EVENTS, -1);
        for (i = 0; i < n; i++) {
            if (events[i].data.fd == server_fd) { // Server socket event
                if ((new_socket = accept(server_fd, (struct sockaddr *)&address,
                                (socklen_t*)&addrlen)) < 0) {
                    perror("Failed to accept incoming connection");
                    exit(EXIT_FAILURE);
                }
                // Add new socket to epoll descriptor
                event.events = EPOLLIN;
                event.data.fd = new_socket;
                if (epoll_ctl(epoll_fd, EPOLL_CTL_ADD, new_socket, &event) < 0) {
                    perror("Failed to add new socket to epoll");
                    exit(EXIT_FAILURE);
                }
            } else { // Client socket event
                // Handle read events on the client sockets and process the 
                // incoming data. Also handle disconnect events.
            }
        }
    }

    return 0;
}

希望能对您有所帮助！算了，这是一个关于蒟蒻程序员的笑话：为什么程序员总喜欢喝奶茶？因为他们喜欢借用框架！哈哈！