libevent_study/test_conf/test_conf.cpp


#include <iostream>
#include<event2/event.h>

#ifndef _WIN32
#include <signal.h>
#endif // !_WIN32

using namespace std;

int main()
{
#ifdef _WIN32
	//初始化socket库
	WSADATA wsa;
	WSAStartup(MAKEWORD(2, 2), &wsa);
#else 
	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！
		return 1;
	}
#endif

	//初始化libevent上下文
	event_config *conf = event_config_new();

	//显示支持的网络模式
	const char** methods =  event_get_supported_methods();
	cout << "supported_methods" << endl;
	for (int i = 0; methods[i] != NULL; i++) {
		cout << methods[i] << endl;
	}


	//设置特征
	event_config_require_features(conf,  EV_FEATURE_FDS);




	
	//初始化配置上下文
	event_base* base =  event_base_new_with_config(conf);
	

	if (!base) {
		cout << "event_base_new_with_config failed!" << endl;
		base = event_base_new();
		if (!base) {
			cerr << "event_base_new failed" << endl;
			return 0;
		}

	}
	else {
		//确认特征是否生效
		int f = event_base_get_features(base);
		if (f& EV_FEATURE_ET) {
			cout << "EV_FEATURE_ET  events are supported" << endl;
		}
		else {
			cout << "EV_FEATURE_ET events are not supported" << endl;
		}
		if (f& EV_FEATURE_O1) {
			cout << "EV_FEATURE_O1 events are supported" << endl;
		}
		else {
			cout << "EV_FEATURE_O1 events are not supported" << endl;
		}
		if (f& EV_FEATURE_FDS) {
			cout << "EV_FEATURE_FDS events are supported" << endl;
		}
		else {
			cout << "EV_FEATURE_FDS events are not supported" << endl;
		}
		if (f& EV_FEATURE_EARLY_CLOSE) {
			cout << "EV_FEATURE_EARLY_CLOSE events are supported" << endl;
		}
		else {
			cout << "EV_FEATURE_EARLY_CLOSE events are not supported" << endl;
		}

		 

		cout << "event_base_new_with_config success!" << endl;
		event_config_free(conf);
	}



	return 0;
}