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// file : odb/lazy-ptr.txx
// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
namespace odb
{
//
// lazy_ptr
//
template <class T>
template <class Y>
bool lazy_ptr<T>::
equal (const lazy_ptr<Y>& r) const
{
bool t1 ((p_ == 0) == loaded ());
bool t2 ((r.p_ == 0) == r.loaded ());
// If both are transient, then compare the underlying pointers.
//
if (t1 && t2)
return p_ == r.p_;
// If one is transient and the other is persistent, then compare
// the underlying pointers but only if they are non NULL. Note
// that an unloaded persistent object is always unequal to a
// transient object.
//
if (t1 || t2)
return p_ == r.p_ && p_ != 0;
// If both objects are persistent, then we compare databases and
// object ids.
//
typedef typename object_traits<T>::object_type object_type1;
typedef typename object_traits<Y>::object_type object_type2;
return i_.database () == r.i_.database () &&
object_id<object_type1> () == r.object_id<object_type2> ();
}
#ifdef ODB_CXX11
//
// lazy_shared_ptr
//
template <class T>
template <class Y>
bool lazy_shared_ptr<T>::
equal (const lazy_shared_ptr<Y>& r) const
{
bool t1 (!p_ == loaded ());
bool t2 (!r.p_ == r.loaded ());
// If both are transient, then compare the underlying pointers.
//
if (t1 && t2)
return p_ == r.p_;
// If one is transient and the other is persistent, then compare
// the underlying pointers but only if they are non NULL. Note
// that an unloaded persistent object is always unequal to a
// transient object.
//
if (t1 || t2)
return p_ == r.p_ && p_;
// If both objects are persistent, then we compare databases and
// object ids.
//
typedef typename object_traits<T>::object_type object_type1;
typedef typename object_traits<Y>::object_type object_type2;
return i_.database () == r.i_.database () &&
object_id<object_type1> () == r.object_id<object_type2> ();
}
//
// lazy_weak_ptr
//
template <class T>
lazy_shared_ptr<T> lazy_weak_ptr<T>::
lock () const
{
std::shared_ptr<T> sp (p_.lock ());
if (sp)
{
if (database_type* db = i_.database ())
return lazy_shared_ptr<T> (*db, sp);
else
return lazy_shared_ptr<T> (sp);
}
else
{
if (i_)
return lazy_shared_ptr<T> (*i_.database (), i_.object_id<T> ());
else
return lazy_shared_ptr<T> ();
}
}
#endif // ODB_CXX11
}
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