Threads in C++11

#include <iostream>
#include <mutex>
#include <thread>

using std::cout;
using std::endl;
using std::thread;

void threadsleep(int millisecs)
{
  std::timed_mutex m;
  m.lock();
  m.try_lock_for(std::chrono::milliseconds(millisecs));
}


class test
{
public:
  test() { }
  void start() {
    t1 = thread(&test::run1, this);
    t2 = thread(&test::run2, this);
  }
  void stop() {
    t1.join();
    t2.join();
  }
private:
  void run1() {
    for (int i=0; i<100; i++) {
      cout << "Run 1 ";
      threadsleep(100);
    }
    cout << endl;
  }
  void run2() {
    for (int i=0; i<100; i++) {
      cout << "Run 2 ";
      threadsleep(100);
    }
    cout << endl;
  }
  thread t1, t2;
};


int main()
{
  test tt;
  cout << "Start..." << endl;
  tt.start();
  threadsleep(1000);
  tt.stop();
  cout << "Done..." << endl;
  return 0;
}