工作程式碼片段-libevent

一個簡單的測試執行個體：

       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);