//-----------------------------------------------------
// spinlock.cc: stallings + interruptor(con spinlock)
//-----------------------------------------------------

#include "spinlock.h"

#include <chrono>
#include <iostream>
#include <latch>
#include <mutex>
#include <thread>

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

using namespace std::literals;

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

const size_t N = 24; // número de hebras

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

std::latch latch(N);
std::mutex no_escritor; // exclusion mutua
interruptor i;          // protección lectores frente a escritores

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

void seccion_critica(char c)
{
    for (char i = 0; i < 10; ++i)
        std::cout << c;
    std::cout << '\n';
}

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

void lector(char c)
{
    latch.arrive_and_wait();
    while (true)
    {
        i.lock(no_escritor);
        seccion_critica(c);
        i.unlock(no_escritor);
    }
}

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

void escritor(char c)
{
    latch.arrive_and_wait();
    while (true)
    {
        no_escritor.lock();
        seccion_critica(c);
        no_escritor.unlock();
    }
}

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

int main()
{
    for (size_t i = 0; i < N / 2; ++i)
    {
        std::thread(lector, '0' + i).detach();
        std::thread(escritor, 'a' + i).detach();
    }

    std::this_thread::sleep_for(12ms);
}

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