living_item.h

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#ifndef LIVING_ITEM_CLASS
#define LIVING_ITEM_CLASS

/*****************************************************************************\
*                                                                             *
*  Name   : living_item                                                       *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 1996-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/

#include "event_flow_dll.h"

#include <basis/mutex.h>
#include <nodes/catalogable.h>

// forward.
class heartbeat;
class istring;
class unique_int;


class EVENT_FLOW_CLASS_STYLE living_item
: public nodes::catalogable,
  public virtual object_base
{
public:
  living_item(const unique_int &unique_id, const heartbeat &initial_beat);
  virtual ~living_item();

  virtual void shut_down_safely() = 0;

  // the mutex base class gives this object methods for synchronization; this
  // object can be locked and unlocked to protect its critical data.

  IMPLEMENT_CLASS_NAME("living_item");

  // these provide access to our health monitor.
  const heartbeat &liveness() const;
  heartbeat &liveness();
  void liveness(const heartbeat &new_beat);

private:
  heartbeat *_liveness;  

  // forbidden.
  living_item(const living_item &);
  living_item &operator =(const living_item &);
};

#endif

---