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// file : odb/qt/smart-ptr/pointer-traits.hxx
// author : Constantin Michael <constantin@codesynthesis.com>
// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
// license : GNU GPL v2; see accompanying LICENSE file
#ifndef ODB_QT_SMART_PTR_POINTER_TRAITS_HXX
#define ODB_QT_SMART_PTR_POINTER_TRAITS_HXX
#include <odb/pre.hxx>
#include <QtCore/QSharedPointer>
#include <QtCore/QWeakPointer>
#include <odb/pointer-traits.hxx>
#include <odb/details/meta/remove-const.hxx>
namespace odb
{
// Specialization for QSharedPointer.
//
template <typename T>
class pointer_traits<QSharedPointer<T> >
{
public:
static const pointer_kind kind = pk_shared;
static const bool lazy = false;
typedef T element_type;
typedef QSharedPointer<element_type> pointer_type;
typedef QSharedPointer<const element_type> const_pointer_type;
typedef typename odb::details::meta::remove_const<element_type>::result
unrestricted_element_type;
typedef QSharedPointer<unrestricted_element_type>
unrestricted_pointer_type;
typedef smart_ptr_guard<pointer_type> guard;
static element_type*
get_ptr (const pointer_type& p)
{
return p.data ();
}
static element_type&
get_ref (const pointer_type& p)
{
return *p;
}
static bool
null_ptr (const pointer_type& p)
{
return !p;
}
static unrestricted_pointer_type
cast (const pointer_type& p)
{
return qSharedPointerConstCast<unrestricted_element_type> (p);
}
public:
static void*
allocate (std::size_t n)
{
return operator new (n);
}
static void
free (void* p)
{
operator delete (p);
}
};
// Specialization for QWeakPointer.
//
template <typename T>
class pointer_traits<QWeakPointer<T> >
{
public:
static const pointer_kind kind = pk_weak;
static const bool lazy = false;
typedef T element_type;
typedef QWeakPointer<element_type> pointer_type;
typedef QSharedPointer<element_type> strong_pointer_type;
static strong_pointer_type
lock (const pointer_type& p)
{
return p.toStrongRef ();
}
};
}
#include <odb/post.hxx>
#endif // ODB_QT_SMART_PTR_POINTER_TRAITS_HXX
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