ACE Tutorial 011
Passing non-trivial data through an ACE_Message_Queue

Before we go further, let's look at this Data object that's causing all the fuss.



class DataBase
{
public:
  DataBase (void)
  {
    ACE_DEBUG ((LM_DEBUG, "(%P|%t) DataBase ctor 0x%x\n", (void *) this));
  }
  virtual ~ DataBase (void)
  {
    ACE_DEBUG ((LM_DEBUG, "(%P|%t) DataBase dtor 0x%x\n", (void *) this));
  }

  void who_am_i (void)
  {
    ACE_DEBUG ((LM_DEBUG, "(%P|%t) DataBase instance 0x%x\n", (void *) this));
  }

  virtual void what_am_i (void)
  {
    ACE_DEBUG ((LM_DEBUG, "(%P|%t) I am a DataBase object\n"));
  }

};

class Data : public DataBase
{
public:
  Data (void)
  : message_ (-1)
  {
    ACE_DEBUG ((LM_DEBUG, "(%P|%t) Data ctor 0x%x\n", (void *) this));
  }

  Data (int message)
  : message_ (message)
  {
    ACE_DEBUG ((LM_DEBUG, "(%P|%t) Data ctor 0x%x for message %d\n", (void *) this, message_));
  }
  virtual ~ Data (void)
  {
    ACE_DEBUG ((LM_DEBUG, "(%P|%t) Data dtor 0x%x\n", (void *) this));
  }

  void what_am_i (void)
  {
    ACE_DEBUG ((LM_DEBUG, "(%P|%t) I am a Data object for message %d\n", message_));
  }

protected:
  int message_;

};


Ok, no mysterious magic on this one. Just a simple object and derivative that report their existence.


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