#include "pthread.h"
#include "stdio.h"


#define N_THREADS 10
#define N_RUNS 10000


void* readStuff(void* a)
{
  int i;
  for (i = 0; i< N_RUNS; i++){
  ;
  }
  pthread_exit((void*)0);
}

void* addRemove(void* a)
{
   int i;
   for (i = 0; i< N_RUNS; i++){
   ;
   }
   pthread_exit((void*)0);
}

int main()
{

pthread_t threads[N_THREADS];
pthread_attr_t attr;
int i;
int rc;
int status;

printf("Testing whether there are problems with concurrency ...");

pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);

for (i = 0; i < N_THREADS; i++){
  if (i) {
    rc = pthread_create(&(threads[i]), &attr, addRemove, 0);
  } else {
    rc = pthread_create(&(threads[i]), &attr, readStuff, 0);
  }
  if (rc) return rc;
}

for(i = 0; i < N_THREADS; i++) {
  rc = pthread_join(threads[i], (void*) &status);
//  if(rc == 3)
      printf("rc is %d. i is %d\n", rc, i);
//  if (rc) return rc;
  if (status) return status;
  printf(".");
}

pthread_attr_destroy(&attr);

return 0;
}