bbtkObject.h

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/*=========================================================================                                                                               
  Program:   bbtk
  Module:    $RCSfile: bbtkObject.h,v $
  Language:  C++
  Date:      $Date: 2008/10/17 08:18:13 $
  Version:   $Revision: 1.7 $
=========================================================================*/

/* ---------------------------------------------------------------------

* Copyright (c) CREATIS-LRMN (Centre de Recherche en Imagerie Medicale)
* Authors : Eduardo Davila, Laurent Guigues, Jean-Pierre Roux
*
*  This software is governed by the CeCILL-B license under French law and 
*  abiding by the rules of distribution of free software. You can  use, 
*  modify and/ or redistribute the software under the terms of the CeCILL-B 
*  license as circulated by CEA, CNRS and INRIA at the following URL 
*  http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.html 
*  or in the file LICENSE.txt.
*
*  As a counterpart to the access to the source code and  rights to copy,
*  modify and redistribute granted by the license, users are provided only
*  with a limited warranty  and the software's author,  the holder of the
*  economic rights,  and the successive licensors  have only  limited
*  liability. 
*
*  The fact that you are presently reading this means that you have had
*  knowledge of the CeCILL-B license and that you accept its terms.
* ------------------------------------------------------------------------ */                                                                         

#ifndef __bbtkObject_h__
#define __bbtkObject_h__

#include <bbtkSystem.h>
#include <boost/shared_ptr.hpp>
#include <boost/weak_ptr.hpp>
#include <set>

namespace bbtk
{

  // The top class of bbtk class hierarchy 
  class BBTK_EXPORT Object 
  {
  public:
    typedef boost::shared_ptr<Object> Pointer;
    typedef boost::weak_ptr<Object> WeakPointer;

    Object();
    virtual ~Object(); 
    
    virtual std::string GetObjectName() const;
    virtual std::string GetObjectInfo() const;
    virtual size_t GetObjectSize() const { return sizeof(Object); }
    virtual size_t GetObjectInternalSize() const { return sizeof(Object); }
    virtual size_t GetObjectRecursiveSize() const { return sizeof(Object); }
    long GetUseCount() { return mThisPointer.use_count(); }
    
    static void InsertInObjectList(Pointer);
    static void RemoveFromObjectList(WeakPointer);

    static void InsertInPackageList(Pointer);
    static void ReleasePackages();

    static void PrintObjectListInfo(const std::string& name);
    //    static void PrintObjectInfo(const std::string& name);
    static void PrintObjectInfo(const Pointer& o); 

    static long GetObjectsCount() { return mgObjectList.size(); }

    struct BBTK_EXPORT Deleter 
    { 
      Deleter() : mPointer() {}
      virtual ~Deleter() {}
      virtual void operator() (Object* p); 
      virtual void Delete(Object* p) { delete p; }
      WeakPointer mPointer;
    };

  protected:
    void LockThis() { mThisPointerLocked = mThisPointer.lock(); }       
    void UnLockThis() { mThisPointerLocked = Pointer(); }
    //    Object::Pointer GetThis() const { return mThisPointer.lock(); } 
    template <class U>
    boost::shared_ptr<U> GetThisPointer() const 
    {
      return boost::dynamic_pointer_cast<U>(mThisPointer.lock());
    }
    template <class U>
    static boost::shared_ptr<U> MakePointer(U* s, bool lock = false)
    {                                                                   
      if (s->mThisPointer.lock())                                       
        {                                                               
          boost::shared_ptr<U> p = s->GetThisPointer<U>();
          if (!lock) s->mThisPointerLocked.reset();
          return p;
        }                                                               
      boost::shared_ptr<U> p = boost::shared_ptr<U>(s,Object::Deleter());
      static_cast<Object::Deleter*>                                     
        (p._internal_get_deleter(typeid(Object::Deleter)))              
        ->mPointer = p;                                                 
      s->mThisPointer = p;                                              
      Object::InsertInObjectList(p);                                    
      if (lock) s->LockThis();                                          
      return p;                                                 
    }                                                                   
    template <class U, class D>
     static boost::shared_ptr<U> MakePointer(U* s, 
                                             const D& del,
                                             bool lock = false)
    {                                                                   
      if (s->mThisPointer.lock())                                       
        {                                                               
          boost::shared_ptr<U> p = s->GetThisPointer<U>();
          if (!lock) s->mThisPointerLocked.reset();
          return p;
        }                                                               
      boost::shared_ptr<U> p = boost::shared_ptr<U>(s,del);
      static_cast<D*>                                   
        (p._internal_get_deleter(typeid(D)))            
        ->mPointer = p;                                                 
      s->mThisPointer = p;                                              
      Object::InsertInObjectList(p);                                    
      if (lock) s->LockThis();                                          
      return p;                                                 
    }                                                                   
     

  private:
    typedef std::set<boost::weak_ptr<Object> > ObjectListType;
    static ObjectListType mgObjectList;
    static ObjectListType mgPackageList;
    WeakPointer mThisPointer;                                           
    Pointer mThisPointerLocked;                                         

  }; 
  
#define BBTK_OBJECT_DEFINE_SELF(CLASS) public : typedef CLASS Self; 
  
#define BBTK_FORWARD_DECLARE_POINTER(CLASS)                     \
  typedef boost::shared_ptr<CLASS> CLASS ## Pointer;            \
    typedef boost::weak_ptr<CLASS> CLASS ## WeakPointer;


#define BBTK_OBJECT_MINIMAL_INTERFACE                                   \
  public:                                                               \
  typedef boost::shared_ptr<Self> Pointer;                              \
    typedef boost::weak_ptr<Self> WeakPointer;                          \
    friend struct Object::Deleter;                                      
  //private:                                                            

  // does not work : why ?
  //      boost::get_deleter<Deleter,Pointer>(pt)->mPointer = pt; 
  //
  
#define BBTK_OBJECT_MINIMAL_INTERFACE_WITH_SELF(CLASS)  \
  public : typedef CLASS Self;                          \
    BBTK_OBJECT_MINIMAL_INTERFACE;              

 
#define BBTK_OBJECT_INTERFACE(CLASS)                                \
  BBTK_OBJECT_MINIMAL_INTERFACE_WITH_SELF(CLASS);                   \
public:                                                             \
  std::string GetObjectName() const;                                \
    std::string GetObjectInfo() const ;                             \
    size_t GetObjectSize() const ;                                  \
    size_t GetObjectInternalSize() const ;                          \
    size_t GetObjectRecursiveSize() const ;                         \
protected:                                                          \
    CLASS();                                                        \
    CLASS(const CLASS&);                                                    \
    ~CLASS();                                       
  
#define BBTK_OBJECT_INTERFACE_NO_CONDES(CLASS)                              \
  BBTK_OBJECT_MINIMAL_INTERFACE_WITH_SELF(CLASS);                   \
public:                                                             \
  std::string GetObjectName() const;                                \
    std::string GetObjectInfo() const ;                             \
    size_t GetObjectSize() const ;                                  \
    size_t GetObjectInternalSize() const ;                          \
    size_t GetObjectRecursiveSize() const ;                         

#define BBTK_ABSTRACT_OBJECT_INTERFACE(CLASS)                           \
  public : typedef CLASS Self;                                          \
    BBTK_OBJECT_MINIMAL_INTERFACE;                                      \
protected:                                                              \
    CLASS();                                                            \
    CLASS(const CLASS&);                                                        \
    virtual ~CLASS();                                       
  
  //=======================================================================
  // A struct with one static instance 
  // just to print object list info after main
  class BBTK_EXPORT StaticInitTime
  {
  public:
    StaticInitTime();
    ~StaticInitTime();


    static bool PrintObjectListInfo;
  private:
    static bbtk::Object mObject;
  };
  
  
  /*
  template <class T, class U>
  inline T BruteForceDownCastPointer(class U p)
  {
    
  }
  */

}// namespace bbtk

#endif