std::jthread::get_stop_token

#include <chrono>
#include <condition_variable>
#include <iostream>
#include <mutex>
#include <string_view>
#include <thread>
 
using namespace std::chrono_literals;
 
void print(std::string_view name, const std::stop_token & token)
{
 std::cout << name << ": stop_possible = " << token.stop_possible();
 std::cout << ", stop_requested = " << token.stop_requested() << '\n';
}
 
void finite_sleepy(std::stop_token stoken)
{
 for (int i = 10; i; --i)
 {
 std::this_thread::sleep_for (300ms);
 if (stoken.stop_requested())
 {
 std::cout << " Sleepy worker is requested to stop\n";
 return;
 }
 
 std::cout << " Sleepy worker goes back to sleep\n";
 }
}
 
void infinite_sleepy()
{
 for (int i = 5; i; --i)
 {
 std::this_thread::sleep_for (300ms);
 std::cout << " Run as long as we want\n";
 }
}
 
 
int main()
{
 std::cout << std::boolalpha ;
 
 // A worker thread that will listen to stop requests
 std::jthread stop_worker(finite_sleepy);
 
 // A worker thread that will only stop when completed
 std::jthread inf_worker(infinite_sleepy);
 
 std::stop_token def_token;
 std::stop_token stop_token = stop_worker.get_stop_token();
 std::stop_token inf_token = inf_worker.get_stop_token();
 print("def_token ", def_token);
 print("stop_token", stop_token);
 print("inf_token ", inf_token);
 
 std::cout << "\nRequest and join stop_worker:\n";
 stop_worker.request_stop();
 stop_worker.join();
 
 std::cout << "\nRequest and join inf_worker:\n";
 inf_worker.request_stop();
 inf_worker.join();
 std::cout << '\n';
 
 print("def_token ", def_token);
 print("stop_token", stop_token);
 print("inf_token ", inf_token);
}

def_token : stop_possible = false, stop_requested = false
stop_token: stop_possible = true, stop_requested = false
inf_token : stop_possible = true, stop_requested = false
 
Request and join stop_worker:
 Run as long as we want
 Sleepy worker is requested to stop
 
Request and join inf_worker:
 Run as long as we want
 Run as long as we want
 Run as long as we want
 Run as long as we want
 
def_token : stop_possible = false, stop_requested = false
stop_token: stop_possible = true, stop_requested = true
inf_token : stop_possible = true, stop_requested = true