function 2 only one time execute in thread

[isan]

I wrote this code in eclipse Linux and when run it only one time function shade() execute and do something after that only function socketHandler() execute,
why this is happen?

int main(){
 ////bind and listen 

  while (true) {

    cout << "\n waiting for a connection" << endl;
    csock = (int*) malloc(sizeof(int));
    if ((*csock = accept(hsock, (sockaddr*) &sadr, &addr_size)) != -1) {
    printf("---------------------\nReceived connection from %s\n",inet_ntoa(sadr.sin_addr));

	pthread_t th1, th2, th3;

       pthread_create(&thread_id, 0, &SocketHandler, (void*) csock);// thread object
       pthread_create(&th1, 0, Shade, 0);	// create it

       pthread_detach(thread_id);
       pthread_detach(th1);

    }
}
void *SocketHandler(void *lp) {

  while (1) {
int *csock = (int*) lp;

    //do something

      fflush(stdout);
      usleep(100);

	}
  pthread_exit(0);

}
void * Shade(void *rt) {
	while (1) {

    //do something

      fflush(stdout);
      usleep(200);
	}
  pthread_exit(0);
}