aboutsummaryrefslogtreecommitdiff
path: root/odb/boost/smart-ptr/lazy-ptr.hxx
diff options
context:
space:
mode:
authorBoris Kolpackov <boris@codesynthesis.com>2011-02-04 13:56:09 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2011-02-04 13:56:09 +0200
commitf1c2a621ac2695dfe4a3bc71dbc9ce3079008d2f (patch)
treed0c45ecd5489cd1b4beb57fc5afda3263ad0d2b2 /odb/boost/smart-ptr/lazy-ptr.hxx
parent6a07b88cdf6419440b19e7b7dbc9231519c32c62 (diff)
Add support for smart-ptr, unordered, and date_time (basic)
Diffstat (limited to 'odb/boost/smart-ptr/lazy-ptr.hxx')
-rw-r--r--odb/boost/smart-ptr/lazy-ptr.hxx237
1 files changed, 237 insertions, 0 deletions
diff --git a/odb/boost/smart-ptr/lazy-ptr.hxx b/odb/boost/smart-ptr/lazy-ptr.hxx
new file mode 100644
index 0000000..4dbf9bf
--- /dev/null
+++ b/odb/boost/smart-ptr/lazy-ptr.hxx
@@ -0,0 +1,237 @@
+// file : odb/boost/smart-ptr/lazy-ptr.hxx
+// author : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef ODB_BOOST_SMART_PTR_LAZY_PTR_HXX
+#define ODB_BOOST_SMART_PTR_LAZY_PTR_HXX
+
+#include <odb/pre.hxx>
+
+#include <memory> // std::auto_ptr
+
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+
+#include <odb/forward.hxx> // odb::database
+#include <odb/traits.hxx>
+#include <odb/lazy-ptr-impl.hxx>
+
+namespace odb
+{
+ namespace boost
+ {
+ template <class T>
+ class lazy_weak_ptr;
+
+ //
+ //
+ template <class T>
+ class lazy_shared_ptr
+ {
+ // The standard shared_ptr interface.
+ //
+ public:
+ typedef T element_type;
+
+ lazy_shared_ptr ();
+ template <class Y> explicit lazy_shared_ptr (Y*);
+ template <class Y, class D> lazy_shared_ptr (Y*, D);
+ template <class Y, class D, class A> lazy_shared_ptr (Y*, D, A);
+
+ lazy_shared_ptr (const lazy_shared_ptr&);
+ template <class Y> lazy_shared_ptr (const lazy_shared_ptr<Y>&);
+ template <class Y> explicit lazy_shared_ptr (const lazy_weak_ptr<Y>&);
+ template <class Y> explicit lazy_shared_ptr (std::auto_ptr<Y>&);
+
+ ~lazy_shared_ptr ();
+
+ lazy_shared_ptr& operator= (const lazy_shared_ptr&);
+ template <class Y> lazy_shared_ptr& operator= (const lazy_shared_ptr<Y>&);
+ template <class Y> lazy_shared_ptr& operator= (std::auto_ptr<Y>&);
+
+ void swap (lazy_shared_ptr&);
+ void reset ();
+ template <class Y> void reset (Y*);
+ template <class Y, class D> void reset (Y*, D);
+ template <class Y, class D, class A> void reset (Y*, D, A);
+
+ T& operator* () const;
+ T* operator-> () const;
+ T* get () const;
+
+ bool unique () const;
+ long use_count () const;
+
+ typedef ::boost::shared_ptr<T> lazy_shared_ptr::*unspecified_bool_type;
+ operator unspecified_bool_type () const
+ {
+ return (p_ || i_) ? &lazy_shared_ptr::p_ : 0;
+ }
+
+ // Initialization/assignment from shared_ptr and weak_ptr.
+ //
+ public:
+ template <class Y> lazy_shared_ptr (const ::boost::shared_ptr<Y>&);
+ template <class Y> explicit lazy_shared_ptr (const ::boost::weak_ptr<Y>&);
+
+ template <class Y> lazy_shared_ptr& operator= (const ::boost::shared_ptr<Y>&);
+
+ // Lazy loading interface.
+ //
+ public:
+ typedef odb::database database_type;
+
+ bool loaded () const;
+ ::boost::shared_ptr<T> load () const;
+
+ // Unload the pointer. For transient objects this function is
+ // equivalent to reset().
+ //
+ void unload () const;
+
+ template <class ID> lazy_shared_ptr (database_type&, const ID&);
+ template <class Y> lazy_shared_ptr (database_type&, Y*);
+ template <class Y, class D> lazy_shared_ptr (database_type&, Y*, D);
+ template <class Y, class D, class A> lazy_shared_ptr (database_type&, Y*, D, A);
+ template <class Y> lazy_shared_ptr (database_type&, std::auto_ptr<Y>&);
+ template <class Y> lazy_shared_ptr (database_type&, const ::boost::shared_ptr<Y>&);
+ template <class Y> lazy_shared_ptr (database_type&, const ::boost::weak_ptr<Y>&);
+
+ template <class ID> void reset (database_type&, const ID&);
+ template <class Y> void reset (database_type&, Y*);
+ template <class Y, class D> void reset (database_type&, Y*, D);
+ template <class Y, class D, class A> void reset (database_type&, Y*, D, A);
+ template <class Y> void reset (database_type&, const std::auto_ptr<Y>&);
+ template <class Y> void reset (database_type&, const ::boost::shared_ptr<Y>&);
+
+ template <class O /* = T */>
+ typename object_traits<O>::id_type object_id () const;
+
+ database_type& database () const;
+
+ // Helpers.
+ //
+ public:
+ template <class Y> bool equal (const lazy_shared_ptr<Y>&) const;
+
+ private:
+ template <class Y> friend class lazy_shared_ptr;
+ template <class Y> friend class lazy_weak_ptr;
+
+ mutable ::boost::shared_ptr<T> p_;
+ mutable lazy_ptr_impl<T> i_;
+ };
+
+ // operator< and operator<< are not provided.
+ //
+ template<class T, class Y>
+ bool operator== (const lazy_shared_ptr<T>&, const lazy_shared_ptr<Y>&);
+
+ template<class T, class Y>
+ bool operator!= (const lazy_shared_ptr<T>&, const lazy_shared_ptr<Y>&);
+
+ template<class T> void swap (lazy_shared_ptr<T>&, lazy_shared_ptr<T>&);
+
+ template<class D, class T>
+ D* get_deleter (const lazy_shared_ptr<T>&);
+
+ //
+ //
+ template <class T>
+ class lazy_weak_ptr
+ {
+ // The standard weak_ptr interface.
+ //
+ public:
+ typedef T element_type;
+
+ lazy_weak_ptr ();
+ template <class Y> lazy_weak_ptr (const lazy_shared_ptr<Y>&);
+ lazy_weak_ptr (const lazy_weak_ptr&);
+ template <class Y> lazy_weak_ptr (const lazy_weak_ptr<Y>&);
+
+ ~lazy_weak_ptr ();
+
+ lazy_weak_ptr& operator= (const lazy_weak_ptr&);
+ template <class Y> lazy_weak_ptr& operator= (const lazy_weak_ptr<Y>&);
+ template <class Y> lazy_weak_ptr& operator= (const lazy_shared_ptr<Y>&);
+
+ void swap (lazy_weak_ptr<T>&);
+ void reset ();
+
+ long use_count () const;
+ bool expired () const;
+
+ lazy_shared_ptr<T> lock () const;
+
+ // Initialization/assignment from shared_ptr and weak_ptr.
+ //
+ public:
+ template <class Y> lazy_weak_ptr (const ::boost::weak_ptr<Y>&);
+ template <class Y> lazy_weak_ptr (const ::boost::shared_ptr<Y>&);
+
+ template <class Y> lazy_weak_ptr& operator= (const ::boost::weak_ptr<Y>&);
+ template <class Y> lazy_weak_ptr& operator= (const ::boost::shared_ptr<Y>&);
+
+ // Lazy loading interface.
+ //
+ public:
+ typedef odb::database database_type;
+
+ // expired() loaded()
+ //
+ // true true expired pointer to transient object
+ // false true valid pointer to persistent object
+ // true false expired pointer to persistent object
+ // false false valid pointer to transiend object
+ //
+ bool loaded () const;
+
+ // Performs both lock and load.
+ //
+ ::boost::shared_ptr<T> load () const;
+
+ // Unload the pointer. For transient objects this function is
+ // equivalent to reset().
+ //
+ void unload () const;
+
+ template <class ID> lazy_weak_ptr (database_type&, const ID&);
+ template <class Y> lazy_weak_ptr (database_type&, const ::boost::shared_ptr<Y>&);
+ template <class Y> lazy_weak_ptr (database_type&, const ::boost::weak_ptr<Y>&);
+
+ template <class ID> void reset (database_type&, const ID&);
+ template <class Y> void reset (database_type&, const ::boost::shared_ptr<Y>&);
+ template <class Y> void reset (database_type&, const ::boost::weak_ptr<Y>&);
+
+ // The object_id() function can only be called when the object is
+ // persistent, or: expired() XOR loaded() (can use != for XOR).
+ //
+ template <class O /* = T */>
+ typename object_traits<O>::id_type object_id () const;
+
+ database_type& database () const;
+
+ private:
+ template <class Y> friend class lazy_shared_ptr;
+ template <class Y> friend class lazy_weak_ptr;
+
+ mutable ::boost::weak_ptr<T> p_;
+ mutable lazy_ptr_impl<T> i_;
+ };
+
+ // operator< is not provided.
+ //
+ template<class T> void swap (lazy_weak_ptr<T>&, lazy_weak_ptr<T>&);
+ }
+}
+
+#include <odb/boost/smart-ptr/lazy-ptr.ixx>
+#include <odb/boost/smart-ptr/lazy-ptr.txx>
+
+#include <odb/boost/smart-ptr/lazy-pointer-traits.hxx>
+
+#include <odb/post.hxx>
+
+#endif // ODB_BOOST_SMART_PTR_LAZY_PTR_HXX