HW 17-1

// Joshua Calloway
// cspp51045
// 17-1
//
#include <iostream>
#include <boost/thread/thread.hpp>
#include <boost/thread/mutex.hpp>
 
using namespace std;
 
boost::mutex io_mutex;
 
struct counter
{
  counter(int id) : id(id) {}
  void operator()() {
    for (int i = 0; i < 100; i++) {
      boost::thread::yield();
      boost::mutex::scoped_lock lock(io_mutex);
      cout << "Thread " << id << " been called " << i << " times." << endl;
    }
  }
  int id;
};
 
int main() {
  boost::thread_group thrds;
 
  thrds.add_thread(new boost::thread(counter(1)));
  thrds.add_thread(new boost::thread(counter(2)));
  thrds.add_thread(new boost::thread(counter(3)));
 
  thrds.join_all();
  return 0;
}