sample

//Send Client Request to Server
void *send_server_request( void *msg_to_snd) //where msg_to_snd is a struct
{
pthread_mutex_lock(&mutex1); //only one client can send a request at a time

struct msgbuf *ms = (struct msgbuf *)msg_to_snd;
msgsnd (msqid, &ms, sizeof(struct msgbuf) - sizeof(long), 0);

pthread_mutex_unlock(&mutex1);
}