std::stop_token::stop_requested(3)

NAME
std::stop_token::stop_requested - std::stop_token::stop_requested

Synopsis
   [[nodiscard]] bool stop_requested() const noexcept; (since C++20)
   Checks if the stop_token object has associated stop-state and that state has
   received a stop request. A default constructed stop_token has no associated
   stop-state, and thus has not had stop requested.

Parameters
   (none)

Return value
   true if the stop_token object has associated stop-state and it received a stop
   request, false otherwise.

Example
// Run this code
 #include <chrono>
 #include <condition_variable>
 #include <iostream>
 #include <mutex>
 #include <string_view>
 #include <thread>
 using namespace std::chrono_literals;
 int main()
 {
     std::cout << std::boolalpha;
     auto 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';
     };
     // A worker thread that will listen to stop requests
     auto stop_worker = std::jthread([](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";
         }
     });
     // A worker thread that will only stop when completed
     auto inf_worker = std::jthread([]()
     {
         for (int i = 5; i; --i)
         {
             std::this_thread::sleep_for(300ms);
             std::cout << " Run as long as we want\n";
         }
     });
     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);
 }

Possible output:
 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