[C++ Multithreading Series] [Six] Set up listener listeners for threads

 

 

#include<iostream>
#include<thread>
#include<mutex>
using namespace std;

class Listener {
public:
	Listener() {};
	~Listener() {};
	void onStart() {
		cout << "start" << endl;
	}

	void onDone(int result) {
		cout << "done" << endl;
		this->result = result;
	}
	int get() {
		return this->result;
	}
private:
	int result;
};

void f(Listener &lis)
{
	int r = 0;
	lis.onStart();
	for (int i = 0; i < 10; i++)
	{
		r += i;
	}
	lis.onDone(r);
}

int main(int argc, int * argv[])
{

	Listener lis;

	thread t1(f, std::ref(lis));

	t1.join();

	cout << lis.get()<< endl;

	cout << "main" << endl;
	system("pause");
}