public class exchange
{
    static private string global_order = "";
    // Put an order
    synchronized bool put(string order)
    {
        if ( global_order == "" )
        {
            global_order = order;
            return true;
	}
	else
	{
             return false;
	}
    }
    // Get an order
    synchronized string get()
    {
        string ret = global_order;
        global_order = "";
        return ret;
    }
}

extern void object::Slave3( )
{
    exchange list = new exchange();
    string   todo;
    while ( true )
    {
        while ( true )
	{
            todo = list.get();
            if ( todo != "" )  break;
            wait(1);
	}
	message(todo);
        if ( strfind(todo, "move") == 0 )
	{
             move(strval(strmid(todo,5)));
	}
	if ( strfind(todo, "turn") == 0 )
	{
            turn(strval(strmid(todo,5)));
	}
    }
}