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

std::atomic<int> x(0), y(0), z(0);
std::atomic<bool> go(false);
unsigned const loop_count = 10;

struct read_values {
  int x, y, z;
};
read_values values1[loop_count];
read_values values2[loop_count];
read_values values3[loop_count];
read_values values4[loop_count];
read_values values5[loop_count];
void
increment(std::atomic<int>* var_to_inc, read_values* values)
{
  while (!go) std::this_thread::yield();
  for (unsigned i = 0; i < loop_count; ++i) {
    values[i].x = x.load(std::memory_order_relaxed);
    values[i].y = y.load(std::memory_order_relaxed);
    values[i].z = z.load(std::memory_order_relaxed);
    var_to_inc->store(i + 1, std::memory_order_relaxed);
    std::this_thread::yield();
  }
}

void
read_vals(read_values* values)
{
  while (!go) std::this_thread::yield();
  for (unsigned i = 0; i < loop_count; ++i) {
    values[i].x = x.load(std::memory_order_relaxed);
    values[i].y = y.load(std::memory_order_relaxed);
    values[i].z = z.load(std::memory_order_relaxed);
    std::this_thread::yield();
  }
}

void
print(read_values* v)
{
  for (unsigned i = 0; i < loop_count; ++i) {
    if (i)
      std::cout << ",";
    std::cout << "(" << v[i].x << "," << v[i].y << "," << v[i].z << ")";
  }
  std::cout << std::endl;
}

int
main()
{
  std::thread t1(increment, &x, values1);
  std::thread t2(increment, &y, values2);
  std::thread t3(increment, &z, values3);
  std::thread t4(read_vals, values4);
  std::thread t5(read_vals, values5);
  go = true;
  t5.join();
  t4.join();
  t3.join();
  t2.join();
  t1.join();
  print(values1);
  print(values2);
  print(values3);
  print(values4);
  print(values5);
}