/*
 * print4.c -- forks off four threads that print their ids
 */

#include <pthread.h>
#include <stdio.h>

unsigned int Ego()
{
	unsigned int return_val;

	return_val = (unsigned int)pthread_self();

	return(return_val);
}

void *printme(void *arg)
{
  printf("Hi.  I'm thread %u\n", Ego());
  return NULL;
}

main()
{
  unsigned int i, vals[4];
  pthread_t tids[4];
  void *retval;

  for (i = 0; i < 4; i++) {
    if (pthread_create(tids+i, NULL, printme, NULL)!=0){
      perror("on create"); 
      exit(0);
    }
  }

  printme(NULL);	/* main thread */

  for (i = 0; i < 4; i++) {
    printf("I'm %u Trying to join with thread %u\n", Ego(),tids[i]);
    pthread_join(tids[i], &retval);
    printf("%u Joined with thread %u\n", Ego(),tids[i]);
  }
}