多线程简单示例

/*
============================================================================
Name        : sockThreadServer.c
Author      : gaotong
Version     :
Copyright   : Your copyright notice
Description : Hello World in C, Ansi-style
============================================================================
*/

#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <pthread.h>
#include <sys/syscall.h>
#include <unistd.h>
#include <string.h>
#define gettid() syscall(__NR_gettid) //获得线程ID

void * handler_conn(void * arg) {
char send_str[100];
int client_sock_fd = *(int *) arg;
char recv_str[100];
//printf("thread run success \n");
while (1) {
read(client_sock_fd, recv_str, 100);

//如果对方发来exit 就断开连接
if (strcmp(recv_str, "exit") == 0) {
break;
}
printf("receive from %d : %s \n", client_sock_fd, recv_str);
int id = gettid(); // 得到线程ID

sprintf(send_str, "这是线程:%d,你好,client_sock_fd:%d\n", id, client_sock_fd);

if(write(client_sock_fd, send_str, 100) == -1){
perror("send error"); //客户端关闭连接
break;
}

printf("我说: %s \n", send_str);

}

free(arg);
puts("断开连接\n");
close(client_sock_fd);
pthread_exit(0);
}

int main(void) {

int * client_sockfd;
int server_len, client_len;
struct sockaddr_in server_address;
struct sockaddr_in client_address;
struct sockaddr_in tempaddr;

server_address.sin_family = AF_INET;
server_address.sin_port = htons(1991);
server_address.sin_addr.s_addr = inet_addr("127.0.0.1");

//创建一个socket
int sock_fd = socket(AF_INET, SOCK_STREAM, 0);

//绑定
bind(sock_fd, (struct sockaddr *) &server_address, sizeof(server_address));

listen(sock_fd, 20);

while (1) {
pthread_t thread; //每连接一个client 就创建一个线程

puts("监听等待：…………\n");
//client_sockfd 需要作为一个指针，传给线程。以便每个线程都能控制自己的连接
client_sockfd = (int *) malloc(sizeof(int));

client_len = sizeof(client_address);

//int accept (int socket, struct sockaddr *addr, socklen_t *length_ptr)
*client_sockfd = accept(sock_fd, (struct sockaddr *) &client_address,
(socklen_t *) &client_len);

printf("client connected ! %d \n", *client_sockfd);

pthread_create(&thread, NULL, handler_conn, client_sockfd);

puts("线程创建\n");
}

return EXIT_SUCCESS;
}

/*
============================================================================
Name        : sockThreadClient.c
Author      : gaotong
Version     :
Copyright   : Your copyright notice
Description : Hello World in C, Ansi-style
============================================================================
*/

#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <pthread.h>
#include <unistd.h>
#include <string.h>

int client_sockfd;
char recv_str[100];

void * getMsg(void * arg){
int test;
while( (test =read(client_sockfd, recv_str, 100)) != EOF){

if(test == 0) //服务器关闭连接
break;
if(test == -1)
{
printf("read error!");
break;
}
printf("收到服务器消息:%s\n",recv_str);
}

close(client_sockfd);
pthread_exit(0);
}

int main(void) {

char char_send[100];

//创建一个socket
client_sockfd = socket(AF_INET, SOCK_STREAM , 0);

struct sockaddr_in serverAddr; //服务器地址
serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(1991);

connect(client_sockfd,(struct sockaddr *)&serverAddr, sizeof(serverAddr));

pthread_t pt;
pthread_create(&pt, NULL, getMsg, NULL);

while(1){
gets(char_send); //从控制台读入要发送的数据
//int send (int socket, void *buffer, size_t size, int flags)
if(send(client_sockfd, char_send,sizeof(char_send),0) == -1){
break;
}
printf("我对服务器说:%s\n",char_send );

if(strcmp(char_send, "exit") == 0){ // 输入exit 退出
break;
}
}

close(client_sockfd);

return EXIT_SUCCESS;
}