rcptrtrick.h

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/* This software and supporting documentation are distributed by
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 *
 * 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".
 *
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 * modify and redistribute granted by the license, users are provided only
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 * economic rights,  and the successive licensors  have only  limited
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 */
 
 
#ifndef CARTOBASE_SMART_RCPTRTRICK_H
#define CARTOBASE_SMART_RCPTRTRICK_H
 
#include <cartobase/smart/rcptr.h>
#include <cartobase/smart/sharedptr.h>
 
namespace carto
{

  class rc_ptr_trick
  {
  public:
    template <typename T> 
    static void releaseOwnership( rc_ptr<T> & );
    static void releaseOwnership( RCObject & );
    template <typename T> 
    static void restoreOwnership( rc_ptr<T> & );
    static void restoreOwnership( RCObject & );
    template <typename T>
    static RCObject::RefCounterType & refCount( shared_ptr<T> & );
    template <typename T>
    static RCObject::RefCounterType & refCount( rc_ptr<T> & );
    static RCObject::RefCounterType & refCount( RCObject & );
    template <typename T>
    static RCObject::RefCounterType & weakCount( weak_shared_ptr<T> & );
    static RCObject::RefCounterType & weakCount( SharedObject & );
  };
 
 
  template <typename T> inline
  void rc_ptr_trick::releaseOwnership( rc_ptr<T> & x )
  {
    if( x._pcount && *x._pcount > 0 )
      ++(*x._pcount);
  }
 
 
  inline void rc_ptr_trick::releaseOwnership( RCObject & x )
  {
    if( x._refCounter > 0 )
      ++x._refCounter;
  }
 
 
  template <typename T> inline
  void rc_ptr_trick::restoreOwnership( rc_ptr<T> & x )
  {
    if( x._pcount && *x._pcount > 0 )
      --(*x._pcount);
  }
 
 
  inline void rc_ptr_trick::restoreOwnership( RCObject & x )
  {
    if( x._refCounter > 0 )
      --x._refCounter;
  }
 
 
  template <typename T> inline
  RCObject::RefCounterType & rc_ptr_trick::refCount( shared_ptr<T> & x )
  {
    return x->_refCounter;
  }
 
 
  template <typename T> inline
  RCObject::RefCounterType & rc_ptr_trick::refCount( rc_ptr<T> & x )
  {
    return *x._pcount;
  }
 
 
  inline RCObject::RefCounterType & rc_ptr_trick::refCount( RCObject & x )
  {
    return x._refCounter;
  }
 
 
  template <typename T> inline
  RCObject::RefCounterType &
  rc_ptr_trick::weakCount( weak_shared_ptr<T> & x )
  {
    return x->weak_count;
  }
 
 
  inline RCObject::RefCounterType &
  rc_ptr_trick::weakCount( SharedObject & x )
  {
    return x.weak_count;
  }
 
}
 
#endif