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windows下编译及使用libevent
Libevent官网：http://libevent.org/
windows 7下编译：
编译环境： windows 7 + VS2010
（1）解压libevent到F:\libevent\libevent-2.0.21-stable
（2）打开Microsoft visual studio 2010命令行工具
（3）修改以下三个文件，添加宏定义：
在以下3个文件开头添加“#define _WIN32_WINNT 0x0500”
libevent-2.0.21-stable\event_iocp.c
libevent-2.0.21-stable\evthread_win32.c
libevent-2.0.21-stable\listener.c
（4）使用VS命令提示工具编译：
cd/d F:\libevent\libevent-2.0.21-stable
nmake /f Makefile.nmake
（5）编译结果：
libevent_core.lib：All core event and buffer functionality. This library contains all the event_base, evbuffer, bufferevent, and utility functions.
libevent_extras.lib：This library defines protocol-specific functionality that you may or may not want for your application, including HTTP, DNS, and RPC.
libevent.lib：This library exists for historical reasons; it contains the contents of both libevent_core and libevent_extra. You shouldn’t use it; it may go away in a future version of Libevent.
（6）VS2010下使用lib
新建一个VC++控制台项目：
环境配置：
项目下建一个Lib目录，将上面三个lib文件copy到该目录下。
新建一个Include目录，将F:\libevent\libevent-2.0.21-stable\include下的文件和文件夹copy到该目录下，F:\libevent\libevent-2.0.21-stable\WIN32-Code下的文件copy到该目录下，2个event2目录下的文件可合并一起。
main代码：
1 // LibeventTest.cpp : 定义控制台应用程序的入口点。 2 // 3 4 #include "stdafx.h" 5 6 #include <string.h> 7 #include <errno.h> 8 #include <stdio.h> 9 #include <signal.h> 10 11 #ifndef WIN32 12 #include <netinet/in.h> 13 # ifdef _XOPEN_SOURCE_EXTENDED 14 # include <arpa/inet.h> 15 # endif 16 #include <sys/socket.h> 17 #endif 18 19 #include "event2/bufferevent.h" 20 #include "event2/buffer.h" 21 #include "event2/listener.h" 22 #include "event2/util.h" 23 #include "event2/event.h" 24 25 #include <WinSock2.h> 26 27 static const char MESSAGE[] = "Hello, World!\n"; 28 29 static const int PORT = 9995; 30 31 32 static void conn_writecb(struct bufferevent *bev, void *user_data) 33 { 34 struct evbuffer *output = bufferevent_get_output(bev); 35 if (evbuffer_get_length(output) == 0) 36 { 37 printf("flushed answer\n"); 38 bufferevent_free(bev); 39 } 40 } 41 42 static void conn_eventcb(struct bufferevent *bev, short events, void *user_data) 43 { 44 if (events & BEV_EVENT_EOF) 45 { 46 printf("Connection closed.\n"); 47 } 48 else if (events & BEV_EVENT_ERROR) 49 { 50 printf("Got an error on the connection: %s\n", 51 strerror(errno));/*XXX win32*/ 52 } 53 /* None of the other events can happen here, since we haven‘t enabled 54 * timeouts */ 55 bufferevent_free(bev); 56 } 57 58 static void signal_cb(evutil_socket_t sig, short events, void *user_data) 59 { 60 struct event_base *base = (struct event_base *)user_data; 61 struct timeval delay = { 2, 0 }; 62 63 printf("Caught an interrupt signal; exiting cleanly in two seconds.\n"); 64 65 event_base_loopexit(base, &delay); 66 } 67 68 static void listener_cb(struct evconnlistener *listener, evutil_socket_t fd, 69 struct sockaddr *sa, int socklen, void *user_data) 70 { 71 struct event_base *base = (struct event_base *)user_data; 72 struct bufferevent *bev; 73 74 bev = bufferevent_socket_new(base, fd, BEV_OPT_CLOSE_ON_FREE); 75 if (!bev) 76 { 77 fprintf(stderr, "Error constructing bufferevent!"); 78 event_base_loopbreak(base); 79 return; 80 } 81 bufferevent_setcb(bev, NULL, conn_writecb, conn_eventcb, NULL); 82 bufferevent_enable(bev, EV_WRITE); 83 bufferevent_disable(bev, EV_READ); 84 85 bufferevent_write(bev, MESSAGE, strlen(MESSAGE)); 86 } 87 88 int main(int argc, char **argv) 89 { 90 struct event_base *base; 91 struct evconnlistener *listener; 92 struct event *signal_event; 93 94 struct sockaddr_in sin; 95 96 #ifdef WIN32 97 WSADATA wsa_data; 98 WSAStartup(0x0201, &wsa_data); 99 #endif100 101 base = event_base_new();102 if (!base) 103 {104 fprintf(stderr, "Could not initialize libevent!\n");105 return 1;106 }107 108 memset(&sin, 0, sizeof(sin));109 sin.sin_family = AF_INET;110 sin.sin_port = htons(PORT);111 112 listener = evconnlistener_new_bind(base, listener_cb, (void *)base,113 LEV_OPT_REUSEABLE|LEV_OPT_CLOSE_ON_FREE, -1,114 (struct sockaddr*)&sin,115 sizeof(sin));116 117 if (!listener) 118 {119 fprintf(stderr, "Could not create a listener!\n");120 return 1;121 }122 123 signal_event = evsignal_new(base, SIGINT, signal_cb, (void *)base);124 125 if (!signal_event || event_add(signal_event, NULL)<0) 126 {127 fprintf(stderr, "Could not create/add a signal event!\n");128 return 1;129 }130 131 event_base_dispatch(base);132 133 evconnlistener_free(listener);134 event_free(signal_event);135 event_base_free(base);136 137 printf("done\n");138 return 0;139 }
项目属性设置：
VC++目录：
包含目录，添加：F:\Projects\LibeventTest\LibeventTest\Include;
库目录，添加：F:\Projects\LibeventTest\LibeventTest\Lib;
C/C++：
代码生成-->运行库：多线程调试 (/MTd)（Debug下），多线程 (/MT)（Release下）
连接器：
输入：ws2_32.lib;wsock32.lib;libevent.lib;libevent_core.lib;libevent_extras.lib;
ws2_32.lib;wsock32.lib;是用来编译Windows网络相关的程序库。
编译，生成！
编译好的libevent lib下载
windows下编译及使用libevent