std::stop_token:: stop_requested

#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';
    };
    // 一个监听停止请求的工作线程
    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 << "  睡眠工作线程收到停止请求\n";
                return;
            }
            std::cout << "  睡眠工作线程继续休眠\n";
        }
    });
    // 一个仅在完成时停止的工作线程
    auto inf_worker = std::jthread([]()
    {
        for (int i = 5; i; --i)
        {
            std::this_thread::sleep_for(300ms);
            std::cout << "  按需运行任意时长\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 << "\n请求并加入stop_worker:\n";
    stop_worker.request_stop();
    stop_worker.join();
    std::cout << "\n请求并加入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);
}