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CTBcallbackBase.hxx

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#ifndef _CTBcallbackBase_HXX
#define _CTBcallbackBase_HXX 1

/*----------------------------------------------------------------------------*/
/* C Tool Box: Designed and implemented by:                                   */
/*    Walter F.J. Mueller   Gesellschaft fuer Schwerionenforschung (GSI)      */
/*                          Planckstrasse 1, D-64291 Darmstadt, Germany       */
/*                  Email:  W.F.J.Mueller@gsi.de                              */
/*                  WWW:    http://www-kp3.gsi.de/www/kp3/people/mueller.html */
/*------------------------------------------+---------------------------------*/
 
#include "CTBsimpleList.hxx"
#include "CTBtreeList.hxx"

class CTBcallbackLink;
class CTBcallbackTargetBase;

class CTBcallbackSourceBase {

  friend class CTBcallbackLink;
  friend class CTBcallbackTargetBase;

  public: 

                    CTBcallbackSourceBase();
                    CTBcallbackSourceBase(const CTBcallbackSourceBase& rhs);

    virtual         ~CTBcallbackSourceBase();

    int             NConnect() const;

    CTBcallbackSourceBase& operator=(const CTBcallbackSourceBase& rhs);

    bool            operator! () const;

                    operator bool() const;

  protected:

    void            Execute(void* p_arg) const;

  protected:

    CTBsimpleListHead<CTBcallbackLink> m_shead;
};

//------------------------------------------+-----------------------------------

class CTBcallbackTargetBase {

  friend class CTBcallbackLink;
  friend class CTBcallbackSourceBase;

  public: 

                    CTBcallbackTargetBase();
                    CTBcallbackTargetBase(const CTBcallbackTargetBase& rhs);

    virtual         ~CTBcallbackTargetBase();

    int             NConnect() const;
    void            Disconnect();

    CTBcallbackTargetBase& operator=(const CTBcallbackTargetBase& rhs);

    bool            operator! () const;

                    operator bool() const;

  protected:

    void            Connect(CTBcallbackSourceBase& source);
    void            Disconnect(CTBcallbackSourceBase& source);

    virtual void    Execute(void* p_arg) const = 0;

  protected:

    CTBtreeListHead<CTBcallbackTargetBase,CTBcallbackLink> m_thead;
};

//------------------------------------------+-----------------------------------

class CTBcallbackLink {

  friend class CTBcallbackSourceBase;
  friend class CTBcallbackTargetBase;

  private:

                    CTBcallbackLink(CTBcallbackTargetBase& target,
                                    CTBcallbackSourceBase& source);
                    CTBcallbackLink(CTBcallbackTargetBase& target,
                                    CTBsimpleListHead<CTBcallbackLink>& shead);
                     
                    ~CTBcallbackLink();
  
    void            Mark();
    void            Unmark();

    bool            Busy() const;
    bool            Zombie() const;
    bool            Deletable() const;

    void            UnlinkSource();
    void            UnlinkTarget();

  private:

    CTBsimpleListLink<CTBcallbackLink>                     m_slink;
    CTBtreeListLink<CTBcallbackTargetBase,CTBcallbackLink> m_tlink;
    int                                                    mi_nbusy;
};

#if !(defined(CTB__OutLine) || defined(CTBcallbackBase__OutLine))
#include "CTBcallbackBase.icc"
#endif

#endif

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