class pthreadbarrier
{
  private:
    pthread_barrier_t barr;

  public:
    pthreadbarrier(unsigned int count)
    {
      BOOST_VERIFY(!pthread_barrier_init(&barr, NULL, count));
    }

    ~pthreadbarrier()
    {
      BOOST_VERIFY(!pthread_barrier_destroy(&barr));
    }

    void wait()
    {
      pthread_barrier_wait(&barr);
    }
};