Synchronizing STD cout output multi-thread

Question

Latelly I\'ve been working with multi-thread coding, after a while writing I realized that if I used std::cout in different boost::threads, the output would came without a l

Answer 1

Use locking. If you can use boost, do e.g.

int my01(boost::mutex *coutGuard)
{
  {
     // lock cout until the closing brace
     boost::mutex::scoped_lock lock(*coutGuard);

     std::cout << "my01" << std::endl;
  }

  return 0;
}

int main( void )
{
   boost::mutex coutGuard;

   boost::thread t1(boost::bind(&my01, &coutGuard));
   ...
}

Instead of a scoped_lock, lock_guard may be used.