thread.cpp

#include <thread>
#include <iostream>

void f1(int& t)
{
        for (int i = 0; i < 100000; ++i)
        {
                std::cout << "f1 running\n";
                t++;
        }
}

class c1
{
    public:
        int  n = 0;
        void f2()
        {
                for (int i = 0; i < 100000; ++i)
                {
                        n++;
                        std::cout << "c1 running\n";
                }
        }
};

class c2
{
    public:
        int  n = 0;
        void operator()()
        {
                for (int i = 0; i < 100000; ++i)
                {
                        n++;
                        std::cout << "c2 running\n";
                }
        }
};

signed main()
{
        int n = 0;
        c1  a;
        c2  b;

        // template< class F, class... Args > explict thread(F&& f, Args&&... args)
        std::thread t1(f1, std::ref(n));
        // thread(thread&& other) noexcept
        std::thread t2(std::move(t1));
        // thread() noexcept
        std::thread t3;
        // template< class F, class... Args > explict thread(F&& f, Args&&... args)
        std::thread t4(&c1::f2, &a);
        // template< class F, class... Args > explict thread(F&& f, Args&&... args)
        std::thread t5(b);

        t2.join();
        t4.join();
        t5.join();

        // t3.join(); error!
        std::cout << n << " " << a.n << " " << b.n << "\n";
        return 0;
}