epoll簡化版本

epoll基於socket

先上socket服務端

#include 

#include 
#include 
#include 
#include 
#include 
#include 
#define maxpending 5 /* max connection requests */
#define buffsize 32
void die(char *mess) 
void handleclient(int sock) 
while (received > 0) 
if ((received = recv(sock, buffer, buffsize, 0)) < 0) 
}close(sock);
}int main(int argc, char *argv) 
if ((serversock = socket(pf_inet, sock_stream, ipproto_tcp)) < 0) 
memset(&echoserver, 0, sizeof(echoserver)); /* clear struct */
echoserver.sin_family = af_inet; /* internet/ip */
echoserver.sin_addr.s_addr = htonl(inaddr_any); /* incoming addr */
echoserver.sin_port = htons(atoi(argv[1])); /* server port */
if (bind(serversock, (struct sockaddr *) &echoserver,sizeof(echoserver)) < 0) 
if (listen(serversock, maxpending) < 0) 
while (1) 
fprintf(stdout, "client connected: %s\n",inet_ntoa(echoclient.sin_addr));
handleclient(clientsock);}}

client

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#define buffsize 32
void die(char *mess) 
int main(int argc, char *argv) 
if ((sock = socket(pf_inet, sock_stream, ipproto_tcp)) < 0) 
memset(&echoserver, 0, sizeof(echoserver)); /* clear struct */
echoserver.sin_family = af_inet; /* internet/ip */
echoserver.sin_addr.s_addr = inet_addr(argv[1]); /* ip address */
echoserver.sin_port = htons(atoi(argv[3])); /* server port */
if (connect(sock,(struct sockaddr *) &echoserver,sizeof(echoserver)) < 0) 
echolen = strlen(argv[2]);
if (send(sock, argv[2], echolen, 0) != echolen) 
fprintf(stdout, "received: ");/* receive the word back from the server */
while (received < echolen) 
received += bytes;
buffer[bytes] = '\0'; /* assure null terminated string */
fprintf(stdout, buffer);
}fprintf(stdout, "\n");
close(sock);
exit(0); 
} 

epoll在這個基礎上改造一下

epolltest.c

#include 

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
using namespace std;
#define maxline 5
#define open_max 100
#define listenq 20
#define serv_port 5000
#define inftim 1000
void setnonblocking(int sock)
opts = opts|o_nonblock;
if(fcntl(sock,f_setfl,opts)<0) 
}int main()
//setnonblocking(connfd);
char *str = inet_ntoa(clientaddr.sin_addr);
cout << "accapt a connection from " << str << endl; 
ev.data.fd=connfd;//設定用於讀操作的檔案描述符
ev.events=epollin|epollet; 設定用於注測的讀操作事件
epoll_ctl(epfd,epoll_ctl_add,connfd,&ev);//註冊ev
}else if(events[i].events&epollin) else
} else if (n == 0) 
line[n] = '\0';
cout << "read " << line << endl;
ev.data.fd=sockfd;//描述符 
ev.events=epollout|epollet;//設定用於注測的寫操作事件 //修改sockfd上要處理的事件為epollout //epoll_ctl(epfd,epoll_ctl_mod,sockfd,&ev);
}else if(events[i].events&epollout)}}
return 0;
}

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