#include <atomic>
#include <chrono>
#include <iostream>
#include <thread>
 
struct Base {
  void init() { t = std::thread{&Base::threadFunc, this}; }
 
  virtual void threadFunc() = 0;
 
  virtual ~Base() {
  	std::cout << "Base::~Base() ENTER" << std::endl;
  	if (t.joinable()) {
  		std::this_thread::sleep_for(std::chrono::seconds(1));
  		dead.store(true);
  		t.join();
  	}
  	std::cout << "Base::~Base() DONE" << std::endl;
  };
 
  std::atomic<bool> dead{false};
  std::thread t;
};
 
struct Derived : Base {
	~Derived() override {
		std::cout << "Derived::~Derived - DESTROYING!!!" << std::endl;
	}
	void threadFunc() override {
		std::cout << "Derived::threadFunc ENTER" << std::endl;
		while (!dead.load()) {
			std::cout << "Derived::threadFunc ACCESSING Derived" << std::endl;
			std::this_thread::sleep_for(std::chrono::milliseconds(100));
		}
		std::cout << "Derived::threadFunc ENTER" << std::endl;
	}
};
 
int main() {
	Derived d;
	d.init();
	std::this_thread::sleep_for(std::chrono::seconds(1));
}

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