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132 lines
3.4 KiB
132 lines
3.4 KiB
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#include <iostream>
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#include<event2/event.h>
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#include<event2/thread.h>
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#include<event2/listener.h>
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#include <string.h>
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#ifdef _WIN32
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#else
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#include <signal.h>
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#endif // !_WIN32
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using namespace std;
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#define SPORT 5001
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void listen_cb(struct evconnlistener *, evutil_socket_t, struct sockaddr *, int socklen, void *arg) {
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std::cout << "listen to be" << std::endl;
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}
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int main()
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{
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#ifdef _WIN32
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//初始化socket库
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WSADATA wsa;
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WSAStartup(MAKEWORD(2, 2), &wsa);
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#else
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if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) { //忽略管道信号，发送数据给已关闭的socket，会飞掉！
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return 1;
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}
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#endif
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//初始化libevent上下文
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event_config *conf = event_config_new();
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//打印支持的网络模式
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const char** methods = event_get_supported_methods();
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cout << "supported_methods" << endl;
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for (int i = 0; methods[i] != NULL; i++) {
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cout << methods[i] << endl;
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}
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//设置特征
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//设置了EV_FEATURE_FDS 其它特征就无法设置，在windows中EV_FEATURE_FDS无效
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//event_config_require_features(conf, EV_FEATURE_FDS); //不支持epoll
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//设置网络模型使用select
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//event_config_avoid_method(conf, "epoll"); //linux 默认顺序为 epoll -> poll -> select
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//event_config_avoid_method(conf, "poll");
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//windows中支持IOCP(线程池) 要查看该项是否开启成功，可以在运行程序后打开任务管理器查看线程数量
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#ifdef _WIN32
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event_config_set_flag(conf, EVENT_BASE_FLAG_STARTUP_IOCP);
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evthread_use_windows_threads();
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//设置cpu数量
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SYSTEM_INFO si;
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GetSystemInfo(&si);
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event_config_set_num_cpus_hint(conf, si.dwNumberOfProcessors);
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#endif
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//初始化配置上下文
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event_base* base = event_base_new_with_config(conf);
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if (!base) {
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cout << "event_base_new_with_config failed!" << endl;
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base = event_base_new();
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if (!base) {
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cerr << "event_base_new failed" << endl;
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return 0;
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}
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}
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else {
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//获取当前网络模型
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cout << "current mothed is " << event_base_get_method(base) << endl;
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//确认特征是否生效
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int f = event_base_get_features(base);
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if (f& EV_FEATURE_ET) {
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cout << "EV_FEATURE_ET events are supported" << endl;
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}
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else {
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cout << "EV_FEATURE_ET events are not supported" << endl;
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}
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if (f& EV_FEATURE_O1) {
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cout << "EV_FEATURE_O1 events are supported" << endl;
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}
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else {
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cout << "EV_FEATURE_O1 events are not supported" << endl;
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}
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if (f& EV_FEATURE_FDS) {
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cout << "EV_FEATURE_FDS events are supported" << endl;
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}
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else {
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cout << "EV_FEATURE_FDS events are not supported" << endl;
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}
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if (f& EV_FEATURE_EARLY_CLOSE) {
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cout << "EV_FEATURE_EARLY_CLOSE events are supported" << endl;
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}
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else {
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cout << "EV_FEATURE_EARLY_CLOSE events are not supported" << endl;
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}
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cout << "event_base_new_with_config success!" << endl;
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sockaddr_in sin;
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memset(&sin, 0, sizeof(sin));
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sin.sin_family = AF_INET;
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sin.sin_port = htons(SPORT);
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evconnlistener * ev = evconnlistener_new_bind(base, //libevent上下文
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listen_cb, //接收到连接的回调函数
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base, //回调函数获取的参数(根据业务来)
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LEV_OPT_REUSEABLE | LEV_OPT_CLOSE_ON_FREE, //地址重用，evconnlistener关闭同时关闭socket
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10, //连接队列大小，对应listen函数参数
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(sockaddr*)&sin,//绑定的地址和端口
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sizeof(sin)
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);
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event_base_dispatch(base);
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event_base_free(base);
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evconnlistener_free(ev);
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event_config_free(conf);
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}
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return 0;
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}
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