目录
libevent是什么
编译
QT使用
测试代码
-
libevent是什么
Fast portable non-blocking network programming with Libevent
http://www.wangafu.net/~nickm/libevent-book/TOC.html
这篇文档讲的很清楚，尤其是Chapter 1: A tiny introduction to asynchronous IO.，基本上讲清楚了大多数的内容
-
编译
环境:
1、win10 64位
2、vs2015专业版(nmake)/Cmake
3、libevent 2.1.11(官方下载链接)
4、libevent解压的文件夹目录为：“E:\libevent\libevent-2.1.11-stable”
参考文章: vs2015编译方式和cmake编译方式.
-
QT使用
根据编译方式不同,配置QT环境.以下使用VS2015方式
创建项目libevent_test.
新建libevent目录下创建libevent.pri文件,并在libevent_test.pro文件中添加
QT += network
INCLUDEPATH += $$PWD/libevent #通过路径添加子文件内容
include($$PWD/libevent/libevent.pri) #添加子文件夹所需pri文件将编译生成的文件放置于libevent目录下
E:\libevent\libevent-2.1.11-stable\include下 event2文件夹及其内文件
E:\libevent\libevent-2.1.11-stable\WIN32-Code\nmake下 evconfig-private.h文件和event2文件夹及其内文件
E:\libevent\libevent-2.1.11-stable下 libevent.lib,libevent_core.lib和libevent_extras.lib文件
libevent.pri文件添加
INCLUDEPATH += -L$$PWD
LIBS += -ladvapi32 -lws2_32 -lwsock32
LIBS += -L$$PWD/ -llibevent -llibevent_core -llibevent_extras-
测试代码
main.cpp
#include <QApplication>
#include <QDebug>
#include <WinSock2.h>
#include <windows.h>
#include "include/event2/listener.h"
#include "include/event2/buffer.h"
#include "include/event2/bufferevent.h"
#include "include/event2/event.h"
#include "include/event2/event_compat.h"
#pragma comment(lib, "ws2_32.lib")
static void echo_read_cb(struct bufferevent *bev,void *ctx)
{
struct evbuffer *input = bufferevent_get_input(bev);
struct evbuffer *output = bufferevent_get_output(bev);
evbuffer_add_buffer(output,input);
qDebug() << " port read " ;
}
static void echo_event_cb(struct bufferevent *bev,short events,void *ctx)
{
if(events & BEV_EVENT_ERROR)
qDebug()<< "error form bufferevent";
if(events & (BEV_EVENT_EOF | BEV_EVENT_ERROR))
bufferevent_free(bev);
}
static void accept_conn_cb(struct evconnlistener *listener,evutil_socket_t fd,struct sockaddr *address,int socklen,void *ctx)
{
struct event_base *base = evconnlistener_get_base(listener);
struct bufferevent *bev = bufferevent_socket_new(base,fd,BEV_OPT_CLOSE_ON_FREE);
bufferevent_setcb(bev,echo_read_cb,NULL,echo_event_cb,NULL);
bufferevent_enable(bev,EV_READ|EV_WRITE);
qDebug() << " port connect ";
}
static void accept_error_cb(struct evconnlistener *listener,void *ctx)
{
struct event_base *base = evconnlistener_get_base(listener);
event_base_loopexit(base,NULL);
}
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
WORD sockVerson = MAKEWORD(2, 2);
WSADATA wsaData;
if (WSAStartup(sockVerson, &wsaData))
{
qDebug() << "init WinSock fail";
return 1;
}
qDebug() << "init WinSock yes";
struct event_base *base;
struct evconnlistener *listener;
struct sockaddr_in sin;
int port = 9876;
base = event_base_new();
memset(&sin,0,sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(0);
sin.sin_port = htons(port);
listener = evconnlistener_new_bind(base,accept_conn_cb,NULL,
LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE,-1,(struct sockaddr*)&sin,sizeof(sin));
if(!listener)
{
qDebug()<<"could't create listener";
return 1;
}
evconnlistener_set_error_cb(listener,accept_error_cb);
event_base_dispatch(base);
qDebug()<<"thread quit";
return a.exec();
}
验证连接
telnet 连接
连接成功
