MAYDAY help about pthread!!!!

hi.i am preparing a project about linux sockets.iam writing a server.iwanna use pthread functions in server code.can anybody help me about usage of pthread funcs .any sample code.i know this functions but dunno how to use.i hope i could explain my problem.

these r the client and server codes.one or more clients will connect to server.there for i have to use pthread functions.i know nothing about them.
i wish u send me some information or samples about them.

CLIENT.C

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <signal.h>

#define PORT 3490
#define MAXDATASIZE 100

int main(int argc, char *argv[])
{
int sockfd, numbytes,a;
char buf[MAXDATASIZE];
char msg[30];
struct hostent *he;
struct sockaddr_in their_addr;

if (argc !=2) {
fprintf(stderr,"usage: client hostname\n");
exit(1);
}

if((he = gethostbyname(argv[1])) == NULL) {
perror("gethostbyname");
exit(1);
}

if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
exit(1);
}

their_addr.sin_family = AF_INET; // host byte order
their_addr.sin_port = htons(PORT); // short, network byte order
their_addr.sin_addr = *((struct in_addr *)he->h_addr);
memset(&(their_addr.sin_zero), '\0', 8);

if (connect(sockfd, (struct sockaddr *)&their_addr, sizeof(struct sockaddr)) < 0) {
perror("connect");
exit(1);
}


printf("Print your message:");
gets(msg);
if(send(sockfd,msg,strlen(msg),0) < 0) {
perror("send");
exit(1);
}

if(recv(sockfd,msg,30,0) < 0) {
perror("recv");
exit(1);
}
puts(msg);


close(sockfd);
return 0;
}



SERVER.C

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/wait.h>
#include <signal.h>

#define MYPORT 3490
#define BACKLOG 10

void sigchld_handler(int s)
{
while(wait(NULL) > 0);
}

int main(void)
{
int sockfd, newfd;
struct sockaddr_in my_addr, their_addr;
int sin_size;
struct sigaction sa;
int yes=1;
char msg[30];

if ((sockfd=socket(AF_INET, SOCK_STREAM, 0)) < 0) {
perror("socket");
exit(1);
}

my_addr.sin_family = AF_INET; // host byte order
my_addr.sin_port = htons(MYPORT); // short, network byte order
my_addr.sin_addr.s_addr = INADDR_ANY;
memset(&(my_addr.sin_zero), '\0', 8);

if (bind(sockfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) < 0) {
perror("bind");
exit(1);
}

if (listen(sockfd, BACKLOG) < 0) {
perror("listen");
exit(1);
}

sa.sa_handler = sigchld_handler; //reap all dead processes
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
if (sigaction(SIGCHLD, &sa, NULL) < 0) {
perror("sigaction");
exit(1);
}

while(1) { //main accept() loop
sin_size = sizeof(struct sockaddr_in);
if((newfd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size)) <0) {
//perror("accept");
continue;
}
printf("server: got connection from %s\n", inet_ntoa(their_addr.sin_addr));

if(!fork()) {
if(recv(newfd,msg,30,0) < 0) {
perror("recv");
exit(1);
}
printf("Message received");
puts(msg);

if(send(newfd,"Message sent",14,0) < 0 ) {
perror("send");
exit(1);
}
}

}
return 0;
}


!!!!!!!!INSTEAD OF FORK I WNAT TO USE PTHREAD FUNCTIONS!!!!!!!!!!