gistfile1.cpp

inline void
do_threaded(int nthread, const std::function<void(int)>& f){
  boost::thread_group compute_threads;
  // Loop over number of threads
  for(int ithr = 0; ithr < nthread; ++ithr) {
    // create each thread that runs f
    compute_threads.create_thread([&, ithr](){
      // run the work
      f(ithr);
    });
  }
  // join the created threads
  compute_threads.join_all();
}

// or, you can use this fancier version with unnecessary complication
template<typename Function, typename... Args>
inline void
do_threaded(int nthread, Args... args, const Function& f){
  boost::thread_group compute_threads;
  // Loop over number of threads
  for(int ithr = 0; ithr < nthread; ++ithr) {
    // create each thread that runs f
    compute_threads.create_thread([&, ithr](){
      // run the work
      f(ithr, args...);
    });
  }
  // join the created threads
  compute_threads.join_all();
}


// Use it like this
int main() {
  int nthread = 8; // for instance

  // Quick, OpenMP-like threading with C++11 lambdas
  do_threaded(nthread, [&](int ithr) {
    //...
  });

}