gistfile1.txt

#include <hpx/hpx_main.hpp>
#include <hpx/hpx.hpp>

#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric> 
#include <atomic>
#include <thread>

class myClass
{
private:
    // shared by all threads;
    static int manager;
public:
    // must being able to call without creating object of myClass 
    static void init()
    {
        manager=42;
    }
    // attachThread must be static
    static int attachThread(int id)
    {
        hpx::threads::set_thread_data(hpx::threads::get_self_id(), id); 
        std::cout 
            << "\n thread id: "<< id << " myID: " 
            << hpx::threads::get_thread_data(hpx::threads::get_self_id()); 
        return hpx::threads::get_thread_data(hpx::threads::get_self_id());
    }
};


int myClass::manager;

int main() {
    myClass::init();
    std::vector<hpx::thread> threads;
    threads.reserve(3);
    threads.emplace_back(&myClass::attachThread, 0);
    threads.emplace_back(&myClass::attachThread, 1);
    threads.emplace_back(&myClass::attachThread, 2);
    
    for ( auto& t : threads )
        t.join();
}