//----------------------------------------------------
// ticketlock-eb.cc
//----------------------------------------------------

#include <atomic>
#include <iostream>
#include <latch>
#include <thread>

//----------------------------------------------------

using namespace std::literals;

//----------------------------------------------------

const size_t N = 32;
std::latch latch(N);
std::atomic<bool> stop = false;

//----------------------------------------------------

class ticketlock
{
public:
    void adquirir()
    {
        unsigned my_ticket = next++;
        while (my_ticket != now)
            std::this_thread::sleep_for(
                std::chrono::microseconds((my_ticket - now) << 3));
    }

    void liberar() { ++now; }

private:
    std::atomic<unsigned> next = 0, now = 0;
} c;

//----------------------------------------------------

void seccion_critica()
{
    std::cout << "[" << std::this_thread::get_id() << "]: ";
    for (size_t i = 0; i < 10; ++i) std::cout << i;
    std::cout << '\n';
}

//----------------------------------------------------

void hebra()
{
    latch.arrive_and_wait();
    while (!stop)
    {
        c.adquirir();
        if (!stop) seccion_critica();
        c.liberar();
    }
}

//----------------------------------------------------

int main()
{
    std::jthread threads[N];

    for (auto &i: threads) i = std::jthread(hebra);

    std::this_thread::sleep_for(75ms);
    stop = true;
}

//----------------------------------------------------