#include <iostream>
#include <thread>
#include <vector>
#include <assert.h>

constexpr unsigned N = 3;

void func(int c) {
  cpu_set_t cpuset;
  CPU_ZERO(&cpuset);
  CPU_SET(c, &cpuset);
  int rc = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
  assert(!rc);

  for (auto i = 0; i < 1000000; i++) {
    try {
      throw 42;
    } catch (...) {
    }
  }
}

int main() {
  std::vector<std::thread> threads;
  threads.reserve(N);

  for (unsigned i = 0; i < N; i++)
    threads.emplace_back(std::thread( [i] { func(i); } ));

  func(N);

  for (unsigned i = 0; i < N; i++)
    threads[i].join();

  return 0;
}