class interrupt_flag {
public:
  void set();
  bool is_set() const;
};
thread_local interrupt_flag this_thread_interrupt_flag;

class interruptible_thread {
  std::thread internal_thread;
  interrupt_flag* flag;

public:
  template <typename FunctionType>
  interruptible_thread(FunctionType f)
  {
    std::promise<interrupt_flag*> p;
    internal_thread = std::thread([f, &p] {
      p.set_value(&this_thread_interrupt_flag);
      f();
    });
    flag            = p.get_future().get();
  }
  void interrupt()
  {
    if (flag) {
      flag->set();
    }
  }
};