sub_ptr.hpp

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#ifndef DART_COMMON_DETAIL_SUB_PTR_HPP_
#define DART_COMMON_DETAIL_SUB_PTR_HPP_
 
#include "dart/common/sub_ptr.hpp"
 
namespace dart {
namespace common {
 
//==============================================================================
template <class T>
sub_ptr<T>::sub_ptr()
  : mT(nullptr),
    mSubjectBase(nullptr)
{
  // Do nothing
}
 
//==============================================================================
template <class T>
sub_ptr<T>::sub_ptr(T* _ptr) : mT(nullptr), mSubjectBase(nullptr)
{
  set(_ptr);
}
 
//==============================================================================
template <class T>
sub_ptr<T>& sub_ptr<T>::operator =(const sub_ptr<T>& _sp)
{
  set(_sp.get());
  return *this;
}
 
//==============================================================================
template <class T>
sub_ptr<T>& sub_ptr<T>::operator =(T* _ptr)
{
  set(_ptr);
  return *this;
}
 
//==============================================================================
template <class T>
sub_ptr<T>::operator T*() const
{
  return mT;
}
 
//==============================================================================
template <class T>
T& sub_ptr<T>::operator*() const
{
  return *mT;
}
 
//==============================================================================
template <class T>
T* sub_ptr<T>::operator->() const
{
  return mT;
}
 
//==============================================================================
template <class T>
T* sub_ptr<T>::get() const
{
  return mT;
}
 
//==============================================================================
template <class T>
void sub_ptr<T>::set(T* _ptr)
{
  if(mT == _ptr)
    return;
 
  removeSubject(mSubjectBase);
  mSubjectBase = dynamic_cast<Subject*>(_ptr);
  mT = _ptr;
  addSubject(mSubjectBase);
}
 
//==============================================================================
template <class T>
bool sub_ptr<T>::valid()
{
  return mT != nullptr;
}
 
//==============================================================================
template <class T>
void sub_ptr<T>::handleDestructionNotification(const Subject* _subject)
{
  if(_subject == mSubjectBase)
  {
    mT = nullptr;
    mSubjectBase = nullptr;
  }
}
 
} // namespace common
} // namespace dart
 
#endif // DART_COMMON_DETAIL_SUB_PTR_HPP_