多线程和epoll的结合运用示例
//epoll通过将服务socket if (epoll_ctl(kdpfd,EPOLL_CTL_ADD,listener,&ev) < 0) 添加到epoll中
//然后listener监听链接请求,每次监听到一个新的链接就添加到epoll中 epoll_ctl //如果不是新的链接那么直接创建一个子线程进行业务的处理 #include <stdio.h> #define MAXBUF 1024 void pthread_handle_message(void para); static int count111 = 0; //------------------------------------------------------------ if (argc>1) myport = atoi(argv[1]); else myport = 8006; if (argc>2) lisnum = atoi(argv[2]); else lisnum = 10; /* 设置每个进程允许打开的最大文件数 */ rt.rlim_max = rt.rlim_cur = MAXEPOLLSIZE; if (setrlimit(RLIMIT_NOFILE,&rt) == -1) { perror("setrlimit"); exit(1); } else printf("设置系统资源参数成功!/n"); /* 开启 socket 监听 */ if ((listener = socket(PF_INET,SOCK_STREAM,0)) == -1) { perror("socket"); exit(1); } else printf("socket 创建成功!/n"); /*设置socket属性,端口可以重用*/ int opt=SO_REUSEADDR; setsockopt(listener,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt)); /*设置socket为非阻塞模式*/ setnonblocking(listener); bzero(&my_addr,sizeof(my_addr)); my_addr.sin_family = PF_INET; my_addr.sin_port = htons(myport); if (argc>3) my_addr.sin_addr.s_addr = inet_addr(argv[3]); else my_addr.sin_addr.s_addr = INADDR_ANY; if (bind (listener,(struct sockaddr *) &my_addr,sizeof(struct sockaddr)) == -1) { perror("bind"); exit(1); } else printf("IP 地址和端口绑定成功/n"); if (listen(listener,lisnum) == -1) { perror("listen"); exit(1); } else printf("开启服务成功!/n"); /* 创建 epoll 句柄,把监听 socket 加入到 epoll 集合里 */ kdpfd = epoll_create(MAXEPOLLSIZE); len = sizeof(struct sockaddr_in); ev.events = EPOLLIN | EPOLLET; ev.data.fd = listener; if (epoll_ctl(kdpfd,&ev) < 0) { fprintf(stderr,"epoll set insertion error: fd=%d/n",listener); return -1; } else printf("监听 socket 加入 epoll 成功!/n"); curfds = 1; while (1) { /* 等待有事件发生 */ nfds = epoll_wait(kdpfd,events,curfds,-1); if (nfds == -1) { perror("epoll_wait"); continue; } /* 处理所有事件 */ for (n = 0; n < nfds; ++n) { if (events[n].data.fd == listener) { new_fd = accept(listener,(struct sockaddr *) &their_addr,&len); if (new_fd < 0) { perror("accept"); continue; } else { //printf("有连接来自于: %s:%d, 分配的 socket 为:%d/n",inet_ntoa(their_addr.sin_addr),ntohs(their_addr.sin_port),new_fd); } setnonblocking(new_fd); ev.events = EPOLLIN | EPOLLET; ev.data.fd = new_fd; if (epoll_ctl(kdpfd,&ev) < 0) { fprintf(stderr,"把 socket ‘%d‘ 加入 epoll 失败!%s/n",strerror(errno)); return -1; } curfds++; } else { pthread_attr_t attr; pthread_t threadId; /*初始化属性值,均设为默认值*/ pthread_attr_init(&attr); pthread_attr_setscope(&attr,PTHREAD_SCOPE_SYSTEM); /* 设置线程为分离属性*/ pthread_attr_setdetachstate(&attr,PTHREAD_CREATE_DETACHED); if(pthread_create(&threadId,&attr,pthread_handle_message,(void*)&(events[n].data.fd))) { perror("pthread_creat error!"); exit(-1); } } } } close(listener); return 0; } void pthread_handle_message(void para) while(rs) { ret = recv(socketfd,recvBuf,1024,0);// 接受客户端消息 if(ret < 0) { //由于是非阻塞的模式,所以当errno为EAGAIN时,表示当前缓冲区已无数据可//读在这里就当作是该次事件已处理过。 if(errno == EAGAIN) { printf("EAGAINn"); break; } else{ printf("recv error! errno:%dn",errno); close(socketfd); break; } } else if(ret == 0) { // 这里表示对端的socket已正常关闭. rs = 0; } if(ret == sizeof(recvBuf)) rs = 1; // 需要再次读取 else rs = 0; } if(ret>0){ count111 ++; struct tm *today; time_t ltime; time( &nowtime ); if(nowtime != oldtime){ printf("%dn",count111); oldtime = nowtime; count111 = 0; } char buf[1000] = {0}; sprintf(buf,"HTTP/1.0 200 OKrnContent-type: text/plainrnrn%s","Hello world!n"); send(socketfd,buf,strlen(buf),0); } close(socketfd); } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |