注：本例是在windows平台上使用
1.官网：http://libevent.org/
下载：libevent-2.1.8-stable
2.使用vs命令工具进行编译：
我使用vs2013。
进入到libevent-2.1.8-stable目录下执行：
nmake /f Makefile.nmake执行完之后，会生成三个lib文件：libevent.lib libevent_core.lib libevent_extras.lib
3.实例
新建工程，将libevent-2.1.8-stable下的include引入到新建工程，并引入以上3个lib文件。
// main.cpp: 定义控制台应用程序的入口点。 // #include "stdafx.h" #include<iostream> #include <sys/types.h> #include <event2/event-config.h> #include <sys/stat.h> #ifndef _WIN32 #include <sys/queue.h> #include <unistd.h> #endif #include <time.h> #ifdef EVENT__HAVE_SYS_TIME_H #include <sys/time.h> #endif #include <fcntl.h> #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h> #include <event2/event.h> #include <event2/event_struct.h> #include <event2/util.h> #ifdef _WIN32 #include <winsock2.h> #endif int Connect(const char* server_ip, int port) { WORD wVR; WSADATA wsaData; wVR = MAKEWORD(1, 1); int nError = WSAStartup(wVR, &wsaData); if (nError != 0) return -1; if (LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) { WSACleanup(); return -1; } int sockfd = ::socket(AF_INET, SOCK_STREAM, 0); if (sockfd == -1) { WSACleanup(); return -1; } struct sockaddr_in server_in; server_in.sin_family = AF_INET; server_in.sin_port = htons(port); server_in.sin_addr.S_un.S_addr = inet_addr(server_ip); int status = connect(sockfd, (struct sockaddr*)&server_in, sizeof(server_in)); if (status == SOCKET_ERROR) { closesocket(sockfd);//关闭socket WSACleanup(); return -1; } evutil_make_socket_nonblocking(sockfd);//设置为非阻塞模式 return sockfd; } void RecvData(int fd, short events, void* arg) { char msg[256] = { 0 }; struct event *ev = (struct event*)arg; int ret = recv(fd, msg, 256, 0); if (ret <= 0) { closesocket(fd); return; } std::cout << "recv " << ret << "bytes:" << msg << std::endl; const char* sendmsg = "recv success!"; ret = send(fd, sendmsg, strlen(sendmsg), 0); if (ret <= 0) { closesocket(fd); return; } return; } bool startEvents() { int sockfd = Connect("127.0.0.1", 8999); if (sockfd == -1) { return false; } struct event_base* base = event_base_new(); struct event *ev_sockfd = event_new(base, sockfd, EV_READ | EV_PERSIST, RecvData, NULL);//可读事件 event_add(ev_sockfd, NULL);//添加事件 event_base_dispatch(base);//循环监听事件 return false; } int main() { startEvents();//启动 return 0; }以上例子是模拟客户端，连接服务端后，监测可读事件。结果如下：
