#include<stdio.h>#include<unistd.h>#include<sys/epoll.h>struct t_connection{int fd;void *(*call)(t_connection*);};void* f(t_connection* c){char buf[1024];read(c->fd, buf, 1);//这里每次取一个字符后，epoll_wait不会被触发printf("recv: %c\n", buf[0]);}int main(){int epfd, nfds;struct epoll_event ev;struct epoll_event events[5];t_connection connection;connection.fd=STDIN_FILENO;connection.call = f;epfd = epoll_create(1);ev.data.ptr = (void*) &connection;ev.events = EPOLLIN | EPOLLET;epoll_ctl(epfd, EPOLL_CTL_ADD, STDIN_FILENO, &ev);for(;;){nfds = epoll_wait(epfd, events, 5, -1);for(int i = 0; i < nfds; ++i){t_connection *c =(t_connection*) events[i].data.ptr;c->call(c);}}}
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