A Functor that takes a string and a function pointer

functor.cpp

#include <boost/thread.hpp>
#include <iostream>
#include <string>
using namespace std;
using namespace boost;


class worker
{
public:
  worker(string wname)
    : m_wname(wname)
  {
  }
      void operator()(){
    cout<<"Worker[ "<< m_wname <<" ]: ";
      }
  void start(string callstring);
  void join();
  void (*w_callback)(string callstring);
private:
  boost::thread m_thread;
  string m_wname;
};

void worker::start(string callstring){
  m_thread = boost::thread(&worker::w_callback,this,callstring);
  }

void worker::join(){
  m_thread.join();
}

void callback(string Callback){
  cout <<"Callback: " << Callback << endl;
}

int main(int argc, char ** argv){
  cout << "Main: Start" << endl;
  worker workme("workme");
  workme.w_callback = &callback;
  workme.start("CallBack CallString");
  workme.join();
  cout << "Main: Waiting on thread" << endl;
  cout << "Main: Returned to Main" << endl;
  return 0;
}