Keep running the function without restarting it?

edit

I have this problem that i cannot make run my while(true) without it get restarted..

I think the problem occurs since

in my main loop

int main
{
    ros::init(argc,argv, "loop");
    loop();
    ros::spin();
}

In side loop()

void loop()
{

   cout << "Are you ready" << endl;
   while(ready == false
  {

      //DO SOMETHING 
     ros::spinOnce() //needed since i read from a subscriber in this while loop
  }

 cout << "i am out" << endl;
 while(true)
 {
 //do something again
     ros::spinOnce();
  }

}

Right now it keep printing "are you ready", the idea was it should print it once.. I don't understand how it comes outside the loop.. it seems impossible to do..