/*  file: mythread_simple.cpp
 *
 */ 
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#define NUM_THREADS 5
#ifndef PTHREAD_STACK_MIN
#define PTHREAD_STACK_MIN 10000
#endif


void *PrintHello (void *threadid) {
  printf("\n%d: hello world!\n",threadid);
  pthread_exit(NULL);
}

int main (int argc, char * argv[]) {
  printf ("Starting main now\n");
  int			number_threads;

  if (argc>1) {
    number_threads=atoi(argv[1]);
}
  else {
    number_threads = NUM_THREADS;
}
  
  pthread_t threads[number_threads];
  pthread_attr_t		attr;
  int rc , t;
  for ( t=0;t<number_threads;t++) {
    pthread_attr_init(&attr);
    printf ("Creating thread %d\n", t);
    rc = pthread_create ( &threads[t], &attr, PrintHello, (void *)t);
    if (rc) {
      printf("ERROR: return code of pthread_create() is %d\n",rc);
      return(-1);
    }
  }
  pthread_exit(NULL);
}