function 2 only one time execute in thread

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?:(

Code:

---

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);
}

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You can create an ExecutorService that only allows a single thread with the Executors.newSingleThreadExecutor method. Once you get the single thread executor, you can call execute with a Runnable parameter:

Executor executor = Executors.newSingleThreadExecutor();
executor.execute(new Runnable() { public void run() { /* do something */ } });