工作代码片段-libevent

一个简单的测试实例：

       void acall(evutil_socket_t af, short, void *param)
       {
             std::cout << "calling" << std::endl;
       }

        sfd =  open("a.txt", 'r');
        struct event_config *cfg = event_config_new();
        event_config_avoid_method(cfg, "epoll");
        event_base *bev = event_base_new_with_config(cfg);//event_base_new();
        event_config_free(cfg);
        event *evn = event_new(bev, sfd, EV_READ| EV_WRITE |EV_PERSIST, acall, 0);
        std::cout << "open:" << sfd << std::endl;
        int e = event_initialized(evn);
        std::cout << "init:" << e << std::endl;
        e = event_add(evn, 0);
        std::cout << "ADD:" << e << std::endl;
        event_set_log_callback(logfn);
        char buff[256];
        read(sfd, buff, 12);
        std::cout << buff << std::endl;
        pthread_t pf;
        pthread_create(&pf, NULL, rfile, NULL);
        e =  event_base_dispatch(bev);
        pthread_join(pf, NULL);