工作代碼片段-libevent

一個簡單的測試實例：

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