?與多進程實現對比來看。

示例來源于網絡視頻

#include <stdio.h>
#include <string.h>
#include <arpa/inet.h>
#include <pthread.h>
#include <ctype.h>
#include <unistd.h>
#include <fcntl.h>#include "wrap.h"#define MAXLINE 8192
#define SERV_PORT 8000struct s_info {                     //定義一個結構體, 將地址結構跟cfd捆綁struct sockaddr_in cliaddr;int connfd;
};void *do_work(void *arg)
{int n,i;struct s_info *ts = (struct s_info*)arg;char buf[MAXLINE];char str[INET_ADDRSTRLEN];      //#define INET_ADDRSTRLEN 16  可用"[+d"查看while (1) {n = Read(ts->connfd, buf, MAXLINE);                     //讀客戶端if (n == 0) {printf("the client %d closed...\n", ts->connfd);break;                                              //跳出循環,關閉cfd}printf("received from %s at PORT %d\n",inet_ntop(AF_INET, &(*ts).cliaddr.sin_addr, str, sizeof(str)),ntohs((*ts).cliaddr.sin_port));                 //打印客戶端信息(IP/PORT)for (i = 0; i < n; i++) buf[i] = toupper(buf[i]);                           //小寫-->大寫Write(STDOUT_FILENO, buf, n);                           //寫出至屏幕Write(ts->connfd, buf, n);                              //回寫給客戶端}Close(ts->connfd);return (void *)0;
}int main(void)
{struct sockaddr_in servaddr, cliaddr;socklen_t cliaddr_len;int listenfd, connfd;pthread_t tid;struct s_info ts[256];      //根據最大線程數創建結構體數組.int i = 0;listenfd = Socket(AF_INET, SOCK_STREAM, 0);                     //創建一個socket, 得到lfdbzero(&servaddr, sizeof(servaddr));                             //地址結構清零servaddr.sin_family = AF_INET;servaddr.sin_addr.s_addr = htonl(INADDR_ANY);                   //指定本地任意IPservaddr.sin_port = htons(SERV_PORT);                           //指定端口號 8000Bind(listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr)); //綁定Listen(listenfd, 128);      //設置同一時刻鏈接服務器上限數printf("Accepting client connect ...\n");while (1) {cliaddr_len = sizeof(cliaddr);connfd = Accept(listenfd, (struct sockaddr *)&cliaddr, &cliaddr_len);   //阻塞監聽客戶端鏈接請求ts[i].cliaddr = cliaddr;ts[i].connfd = connfd;/* 達到線程最大數時，pthread_create出錯處理, 增加服務器穩定性 */pthread_create(&tid, NULL, do_work, (void*)&ts[i]);pthread_detach(tid);                                                    //子線程分離,防止僵線程產生.i++;}return 0;
}