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

std::atomic<size_t> g_counter(0);

void f() {
  for (auto i = 0; i < 100000; ++i) ++g_counter;
  if (false) return;
}

void f2() {}

int main() {
  std::thread t1(f);
  std::thread t2(f);
  t1.join();
  t2.join();
  std::cout << g_counter << std::endl;
  return 0;
}

///////////////////////////////////////////////////

Name                        Regions    Miss   Cover     Lines    Miss   Cover
-----------------------------------------------------------------------------
_Z1fv                             5       1  80.00%         4       1  75.00%
_Z2f2v                            1       1   0.00%         1       1   0.00%
main                              1       0 100.00%         8       0 100.00%
-----------------------------------------------------------------------------
TOTAL                             7       2  71.43%        13       2  84.62%