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

unsigned long work1 = 0, work2 = 0;
pthread_barrier_t barrier;

void *thread1(void *parg)
{
    pthread_barrier_wait(&barrier);
	while(1)
    {
       work1++;
    }
    return NULL;
}

void *thread2(void *parg)
{
    pthread_barrier_wait(&barrier);
    while(1)
     {
    	 work2++;
     }
     return NULL;
}


int main(int argc, char *argv[])
{
      pthread_barrierattr_t barrierAttr;
      pthread_t threadID;
      pthread_attr_t threadAttr;

      pthread_barrierattr_init(&barrierAttr);
      pthread_barrier_init(&barrier, &barrierAttr, 3);

      pthread_attr_init(&threadAttr);
      pthread_attr_setdetachstate(&threadAttr, PTHREAD_CREATE_DETACHED);

      pthread_create(&threadID, &threadAttr, thread1, NULL);
      pthread_create(&threadID, &threadAttr, thread2, NULL);

      pthread_barrier_wait(&barrier);

      setprio( 0, 11 );
      while (1)
      {
    	  sleep(1);
    	  printf( "%lu  %lu\n", work1, work2 );
      }
      return 0;
}