多线程,在LINUX TCP服务器程序中如何写

多线程，在LINUX TCP服务器程序中如何写？（参考案例源代码）
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#include<sys/types.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<unistd.h>
#include<stdio.h>
#include<pthread.h>
#include<sched.h>
#define PORT 5678
pthread_mutex_t mutex;
int sockfd,newsockfd,fd;
char msgbuffer[256];
char msgh[100];
char strsend[200];
char msg[] ="This is the message from server.Connected.\n";
char msg1[] ="hello china.\n";
void *fun1() //接收数据线程
{
while(1)
{
recv(newsockfd,msgh,100,0);
printf("%s\n",msgh);
bzero(msgh,100);
}
}
void *fun2()//发送数据线程
{
while(1)
{
scanf("%s",strsend);
send(newsockfd,strsend,strlen(strsend),0);
}
}
main()
{
struct sockaddr_in addr;
int addr_len = sizeof(struct sockaddr_in);
fd_set myreadfds;
int i;
pthread_t id1;
pthread_t id2;
int policy;
int res;
int max_priority,min_priority;
struct sched_param param;
struct sched_param param1;
pthread_attr_t attr;
pthread_attr_t attr1;
if ((sockfd = socket(AF_INET,SOCK_STREAM,0))<0) {
perror("socket");
exit(1);
}
else
{
printf("socket created .\n");
printf("socked id: %d \n",sockfd);
}
bzero(&addr,sizeof(addr));
addr.sin_family =AF_INET;
addr.sin_port = htons(PORT);
addr.sin_addr.s_addr = htonl(INADDR_ANY);
if(bind(sockfd,&addr,sizeof(addr))<0)
{
perror("connect");
exit(1);
}
else
{
printf("connected.\n");
printf("local port:%d\n",PORT) ;
}
if(listen(sockfd,3)<0)
{
perror("listen");
exit(1);
}
else
{
printf("listenning......\n");
}
if((newsockfd = accept (sockfd,&addr,&addr_len))<0) {
perror("accept");
}
else
{
printf("accepted a new connecttion.\n");
}
// send(newsockfd,msg1,strlen(msg1),0);
res = pthread_mutex_init(&mutex, NULL);
if (res != 0)
{
perror("Mutex init failed!");
}
pthread_attr_init(&attr);
pthread_attr_setinheritsched(&attr,PTHREAD_EXPLICIT_SCHED); //pthread_attr_getinheritsched(&attr,&policy);
pthread_attr_setschedpolicy(&attr,SCHED_RR);
//pthread_attr_getschedpolicy(&attr,&policy);
param.sched_priority=99;
pthread_attr_setschedparam(&attr,&param);
//pthread_attr_destroy(&attr);
pthread_create(&id1,&attr,fun1,NULL);
//pthread_join(child_thread_id,NULL);
pthread_attr_init(&attr1);
pthread_attr_setinheritsched(&attr1,PTHREAD_EXPLICIT_SCHED);
pthread_attr_getinheritsched(&attr1,&policy);
pthread_attr_setschedpolicy(&attr1,SCHED_RR);
pthread_attr_getschedpolicy(&attr1,&policy);
param1.sched_priority=1;
pthread_attr_setschedparam(&attr1,&param1);
//pthread_attr_destroy(&attr);
pthread_create(&id2,&attr1,fun2,NULL);
for(;;)
{
}
close(newsockfd );
close(sockfd );
}。