Cptr.h

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/* ========================================================================
 * Copyright (c) 2006,
 * Institute for Computer Graphics and Vision
 * Graz University of Technology
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
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 *
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 *
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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 * ========================================================================
 * PROJECT: OpenTracker
 * ======================================================================== */
/* ======================================================================= */


#ifndef OT_MISC_CPTR_H_INCLUDED
#define OT_MISC_CPTR_H_INCLUDED

#include <cassert>


template <class T>
class Cptr{

 protected:
  T * obj;

 public:

  Cptr () :obj(0){};
  Cptr(T * o):obj(0){
    *this = o;
  }; 

  Cptr (const Cptr<T> & p): obj(0){ 
    *this = p;
  };
  
  ~Cptr (){
    if(obj) obj->_deref();
  };

  inline Cptr<T>& operator = (const Cptr<T> &p){

    if(obj) obj->_deref();
    obj=p.obj;
    if(obj) obj->_ref();
    return *this;
  };

  inline Cptr<T>& operator = (T * p){

    if(obj) obj->_deref();
    obj=p;
    if(obj) obj->_ref() ;
    return *this;
  };

  inline T& operator *(){
    assert (obj != 0 && "Tried to access empty obj");
    return *obj;
  };


  inline T* operator ->() const {

    assert (obj != 0 && "Tried to -> empty obj");
    return obj;
  };

  inline operator T* () const{
    return obj;
  } ;

  inline T* item () const {
    return obj;
  }     

  inline bool operator !() {return !(obj);};

  inline bool isValid() const {
    return (obj !=0);
  };

  inline bool operator ==(const Cptr<T> &p) const{

    return (obj == p.obj);
  };

  inline bool operator == (T * o) const{
    return (obj == o);
  };

};

#endif // MEM_CPTR_H_INCLUDED


/* 
 * ------------------------------------------------------------
 *   End of Cptr.h
 * ------------------------------------------------------------
 *   Automatic Emacs configuration follows.
 *   Local Variables:
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 */

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