#include <thread>
#include <iostream>
#include <assert.h>
#include <chrono>
#include <future>
void threadFunction(std::future<void> futureObj)
{
    std::cout << "Thread Start" << std::endl;
    while (futureObj.wait_for(std::chrono::milliseconds(1)) == std::future_status::timeout)
    {
        std::cout << "Doing Some Work" << std::endl;
        std::this_thread::sleep_for(std::chrono::milliseconds(1000));
    }
    std::cout << "Thread End" << std::endl;
}
int main()
{
	 using namespace std::chrono_literals;
    // Create a std::promise object
    std::promise<void> exitSignal;
    //Fetch std::future object associated with promise
    std::future<void> futureObj = exitSignal.get_future();
    // Starting Thread & move the future object in lambda function by reference
    std::thread th(&threadFunction, std::move(futureObj));
    //Wait for 10 sec
 
    auto start = std::chrono::high_resolution_clock::now();
    std::this_thread::sleep_for(10000ms);
    auto end = std::chrono::high_resolution_clock::now();
    std::chrono::duration<double, std::milli> elapsed = end-start;
    std::cout << "Waited " << elapsed.count() << " ms\n";
 
    std::cout << "Asking Thread to Stop" << std::endl;
    //Set the value in promise
    exitSignal.set_value();
    //Wait for thread to join
    th.join();
    std::cout << "Exiting Main Function" << std::endl;
    return 0;
}

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