1.检测是否安装

安装了的话应该是这样的：如果不是，那就装一下。

root@iZ23nyl8frqZ:/home/upload# ls -a /usr/lib |grep libevent

libevent-2.0.so.5

libevent-2.0.so.5.1.9

libevent.a

libevent_core-2.0.so.5

libevent_core-2.0.so.5.1.9

libevent_core.a

libevent_core.la

libevent_core.so

libevent_extra-2.0.so.5

libevent_extra-2.0.so.5.1.9

libevent_extra.a

libevent_extra.la

libevent_extra.so

libevent.la

libevent_pthreads-2.0.so.5

libevent_pthreads-2.0.so.5.1.9

libevent_pthreads.a

libevent_pthreads.la

libevent_pthreads.so

libevent.so

2.下载

http://libevent.org/

3.安装

tar -xf libevent-2.0.22-stable.tar.gz./configure –prefix=/usr         //配置目录makesudo make install

 

4.验证

root@iZ23nyl8frqZ:/home/upload# ls -a /usr/lib |grep libevent

libevent-2.0.so.5

libevent-2.0.so.5.1.9

libevent.a

libevent_core-2.0.so.5

libevent_core-2.0.so.5.1.9

libevent_core.a

libevent_core.la

libevent_core.so

libevent_extra-2.0.so.5

libevent_extra-2.0.so.5.1.9

libevent_extra.a

libevent_extra.la

libevent_extra.so

libevent.la

libevent_pthreads-2.0.so.5

libevent_pthreads-2.0.so.5.1.9

libevent_pthreads.a

libevent_pthreads.la

libevent_pthreads.so

libevent.so

 

5.测试

服务器端ser.c

#include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          #include 
          
           #include 
           
            #define PORT 25341#define BACKLOG 5#define MEM_SIZE 1024struct event_base* base;struct sock_ev{ struct event* read_ev; struct event* write_ev; char* buffer;};void release_sock_event(struct sock_ev* ev){ event_del(ev->read_ev); free(ev->read_ev); free(ev->write_ev); free(ev->buffer); free(ev);}void on_write(int sock, short event, void* arg){ char* buffer = (char*)arg; send(sock, buffer, strlen(buffer), 0); free(buffer);}void on_read(int sock, short event, void* arg){ struct event* write_ev; int size; struct sock_ev* ev = (struct sock_ev*)arg; ev->buffer = (char*)malloc(MEM_SIZE); bzero(ev->buffer, MEM_SIZE); size = recv(sock, ev->buffer, MEM_SIZE, 0); printf("receive data:%s, size:%d\n", ev->buffer, size); if (size == 0) { release_sock_event(ev); close(sock); return; } event_set(ev->write_ev, sock, EV_WRITE, on_write, ev->buffer); event_base_set(base, ev->write_ev); event_add(ev->write_ev, NULL);}void on_accept(int sock, short event, void* arg){ struct sockaddr_in cli_addr; int newfd, sin_size; struct sock_ev* ev = (struct sock_ev*)malloc(sizeof(struct sock_ev)); ev->read_ev = (struct event*)malloc(sizeof(struct event)); ev->write_ev = (struct event*)malloc(sizeof(struct event)); sin_size = sizeof(struct sockaddr_in); newfd = accept(sock, (struct sockaddr*)&cli_addr, &sin_size); event_set(ev->read_ev, newfd, EV_READ|EV_PERSIST, on_read, ev); event_base_set(base, ev->read_ev); event_add(ev->read_ev, NULL);}int main(int argc, char* argv[]){ struct sockaddr_in my_addr; int sock; sock = socket(AF_INET, SOCK_STREAM, 0); int yes = 1; setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)); memset(&my_addr, 0, sizeof(my_addr)); my_addr.sin_family = AF_INET; my_addr.sin_port = htons(PORT); my_addr.sin_addr.s_addr = INADDR_ANY; bind(sock, (struct sockaddr*)&my_addr, sizeof(struct sockaddr)); listen(sock, BACKLOG); struct event listen_ev; base = event_base_new(); event_set(&listen_ev, sock, EV_READ|EV_PERSIST, on_accept, NULL); event_base_set(base, &listen_ev); event_add(&listen_ev, NULL); event_base_dispatch(base); return 0;}
           
          
         
        
       
      
     

客户端client.c：

#include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          #include 
          
           #include 
           
            #define cerror(str) do{perror(str); exit(EXIT_FAILURE); }while(0)static int port; static char addr[256];static int nlen;static char msg[]="hello\n";int main(int argc, char*argv[]){ int fd; struct sockaddr_in sin; memset(&sin, 0, sizeof(sin)); sin.sin_family = AF_INET; if(argc<3) { port = 8888; }else { port = atoi(argv[2]); } sin.sin_port = htons(port); if(argc<2) { strcpy(addr, argv[1]); if (inet_pton(AF_INET, addr, &(sin.sin_addr) )<0) { struct hostent *psh; psh=gethostbyname(addr); if(psh!=NULL) inet_pton(AF_INET, psh->h_addr, &(sin.sin_addr) ); else cerror("inet_pton"); } } if((fd=socket(AF_INET, SOCK_STREAM, 0))<0) cerror("socket"); if(connect(fd, (struct sockaddr*)&sin, sizeof(sin))<0 ) cerror("sonnect"); if( (nlen = write(fd,msg, strlen(msg)))<0 ) cerror("write"); if( (nlen = read(fd,msg, strlen(msg)))<0 ) cerror("read"); msg[nlen]='\0'; printf("msg: %s\n", msg); return 0;}
           
          
         
        
       
      
     

编译

chen@chen-book1:~/libevent20/sample$ gcc echo_client.c -o clientchen@chen-book1:~/libevent20/sample$ gcc ser.c -o ser -leventchen@chen-book1:~/libevent20/sample$ ./ser &[1] 6995chen@chen-book1:~/libevent20/sample$ ./client localhost 25341receive data:hello, size:6msg: helloreceive data:, size:0chen@chen-book1:~/libevent20/sample$ ./client localhost 25341receive data:hello, size:6msg: hello