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Diffstat (limited to 'libodb/odb/lazy-pointer-traits.hxx')
-rw-r--r-- | libodb/odb/lazy-pointer-traits.hxx | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/libodb/odb/lazy-pointer-traits.hxx b/libodb/odb/lazy-pointer-traits.hxx new file mode 100644 index 0000000..2a6c8eb --- /dev/null +++ b/libodb/odb/lazy-pointer-traits.hxx @@ -0,0 +1,141 @@ +// file : odb/lazy-pointer-traits.hxx +// license : GNU GPL v2; see accompanying LICENSE file + +#ifndef ODB_LAZY_POINTER_TRAITS_HXX +#define ODB_LAZY_POINTER_TRAITS_HXX + +#include <odb/pre.hxx> + +#include <odb/pointer-traits.hxx> +#include <odb/lazy-ptr.hxx> +#include <odb/details/config.hxx> // ODB_CXX11 + +namespace odb +{ + template <typename T> + class pointer_traits< lazy_ptr<T> > + { + public: + static const pointer_kind kind = pk_raw; + static const bool lazy = true; + + typedef T element_type; + typedef lazy_ptr<element_type> pointer_type; + typedef element_type* eager_pointer_type; + + static bool + null_ptr (const pointer_type& p) + { + return !p; + } + + template <class O /* = T */> + static typename object_traits<O>::id_type + object_id (const pointer_type& p) + { + return p.template object_id<O> (); + } + }; + +#ifndef ODB_CXX11 + template <typename T> + class pointer_traits< lazy_auto_ptr<T> > + { + public: + static const pointer_kind kind = pk_unique; + static const bool lazy = true; + + typedef T element_type; + typedef lazy_auto_ptr<element_type> pointer_type; + typedef std::auto_ptr<element_type> eager_pointer_type; + + static bool + null_ptr (const pointer_type& p) + { + return !p; + } + + template <class O /* = T */> + static typename object_traits<O>::id_type + object_id (const pointer_type& p) + { + return p.template object_id<O> (); + } + }; +#endif + +#ifdef ODB_CXX11 + template <typename T, typename D> + class pointer_traits<lazy_unique_ptr<T, D>> + { + public: + static const pointer_kind kind = pk_unique; + static const bool lazy = true; + + typedef T element_type; + typedef lazy_unique_ptr<element_type, D> pointer_type; + typedef std::unique_ptr<element_type, D> eager_pointer_type; + + static bool + null_ptr (const pointer_type& p) + { + return !p; + } + + template <class O /* = T */> + static typename object_traits<O>::id_type + object_id (const pointer_type& p) + { + return p.template object_id<O> (); + } + }; + + template <typename T> + class pointer_traits<lazy_shared_ptr<T>> + { + public: + static const pointer_kind kind = pk_shared; + static const bool lazy = true; + + typedef T element_type; + typedef lazy_shared_ptr<element_type> pointer_type; + typedef std::shared_ptr<element_type> eager_pointer_type; + + static bool + null_ptr (const pointer_type& p) + { + return !p; + } + + template <class O /* = T */> + static typename object_traits<O>::id_type + object_id (const pointer_type& p) + { + return p.template object_id<O> (); + } + }; + + template <typename T> + class pointer_traits<lazy_weak_ptr<T>> + { + public: + static const pointer_kind kind = pk_weak; + static const bool lazy = true; + + typedef T element_type; + typedef lazy_weak_ptr<element_type> pointer_type; + typedef lazy_shared_ptr<element_type> strong_pointer_type; + typedef std::weak_ptr<element_type> eager_pointer_type; + + static strong_pointer_type + lock (const pointer_type& p) + { + return p.lock (); + } + }; +#endif // ODB_CXX11 +} + +#include <odb/post.hxx> + +#endif // ODB_LAZY_POINTER_TRAITS_HXX |