From fb2519f6f9d79c7626a0281ad24925b4976cd81d Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 21 May 2013 19:22:51 -0400
Subject: Add ability to get underlying eager pointer in weak pointers

---
 odb/lazy-ptr.hxx     | 25 +++++++++++++++++++++++++
 odb/lazy-ptr.ixx     | 35 +++++++++++++++++++++++++++++++++++
 odb/tr1/lazy-ptr.hxx | 10 ++++++++++
 odb/tr1/lazy-ptr.ixx | 14 ++++++++++++++
 4 files changed, 84 insertions(+)

diff --git a/odb/lazy-ptr.hxx b/odb/lazy-ptr.hxx
index d54cac0..e340d94 100644
--- a/odb/lazy-ptr.hxx
+++ b/odb/lazy-ptr.hxx
@@ -72,6 +72,11 @@ namespace odb
     //
     void unload () const;
 
+    // Get the underlying eager pointer. If this is an unloaded pointer
+    // to a persistent object, then the returned pointer will be NULL.
+    //
+    T* get_eager () const;
+
     template <class DB, class ID> lazy_ptr (DB&, const ID&);
     template <class DB, class Y> lazy_ptr (DB&, Y*);
 
@@ -185,6 +190,11 @@ namespace odb
     //
     void unload () const;
 
+    // Get the underlying eager pointer. If this is an unloaded pointer
+    // to a persistent object, then the returned pointer will be NULL.
+    //
+    std::auto_ptr<T>& get_eager () const;
+
     template <class DB, class ID> lazy_auto_ptr (DB&, const ID&);
     template <class DB> lazy_auto_ptr (DB&, T*);
     template <class DB, class Y> lazy_auto_ptr (DB&, std::auto_ptr<Y>&);
@@ -305,6 +315,11 @@ namespace odb
     //
     void unload () const;
 
+    // Get the underlying eager pointer. If this is an unloaded pointer
+    // to a persistent object, then the returned pointer will be NULL.
+    //
+    std::unique_ptr<T, D>& get_eager () const;
+
     template <class DB, class ID> lazy_unique_ptr (DB&, const ID&);
     template <class DB> lazy_unique_ptr (DB&, pointer);
     template <class DB> lazy_unique_ptr (DB&, pointer, const deleter_type&);
@@ -464,6 +479,11 @@ namespace odb
     //
     void unload () const;
 
+    // Get the underlying eager pointer. If this is an unloaded pointer
+    // to a persistent object, then the returned pointer will be NULL.
+    //
+    std::shared_ptr<T> get_eager () const;
+
     template <class DB, class ID> lazy_shared_ptr (DB&, const ID&);
     template <class DB, class Y> lazy_shared_ptr (DB&, Y*);
     template <class DB, class Y, class D> lazy_shared_ptr (DB&, Y*, D);
@@ -593,6 +613,11 @@ namespace odb
     //
     void unload () const;
 
+    // Get the underlying eager pointer. If this is an unloaded pointer
+    // to a persistent object, then the returned pointer will be NULL.
+    //
+    std::weak_ptr<T> get_eager () const;
+
     template <class DB, class ID> lazy_weak_ptr (DB&, const ID&);
     template <class DB, class Y> lazy_weak_ptr (DB&, const std::shared_ptr<Y>&);
     template <class DB, class Y> lazy_weak_ptr (DB&, const std::weak_ptr<Y>&);
diff --git a/odb/lazy-ptr.ixx b/odb/lazy-ptr.ixx
index 724142a..da02528 100644
--- a/odb/lazy-ptr.ixx
+++ b/odb/lazy-ptr.ixx
@@ -137,6 +137,13 @@ namespace odb
   }
 
   template <class T>
+  inline T* lazy_ptr<T>::
+  get_eager () const
+  {
+    return p_;
+  }
+
+  template <class T>
   template <class DB, class ID>
   inline lazy_ptr<T>::
   lazy_ptr (DB& db, const ID& id): p_ (0), i_ (db, id) {}
@@ -396,6 +403,13 @@ namespace odb
   }
 
   template <class T>
+  inline std::auto_ptr<T>& lazy_auto_ptr<T>::
+  get_eager () const
+  {
+    return p_;
+  }
+
+  template <class T>
   template <class DB, class ID>
   inline lazy_auto_ptr<T>::
   lazy_auto_ptr (DB& db, const ID& id): i_ (db, id) {}
@@ -667,6 +681,13 @@ namespace odb
   }
 
   template <class T, class D>
+  inline std::unique_ptr<T, D>& lazy_unique_ptr<T, D>::
+  get_eager () const
+  {
+    return p_;
+  }
+
+  template <class T, class D>
   template <class DB, class ID>
   inline lazy_unique_ptr<T, D>::
   lazy_unique_ptr (DB& db, const ID& id): i_ (db, id) {}
@@ -1150,6 +1171,13 @@ namespace odb
   }
 
   template <class T>
+  inline std::shared_ptr<T> lazy_shared_ptr<T>::
+  get_eager () const
+  {
+    return p_;
+  }
+
+  template <class T>
   template <class DB, class ID>
   inline lazy_shared_ptr<T>::
   lazy_shared_ptr (DB& db, const ID& id): i_ (db, id) {}
@@ -1536,6 +1564,13 @@ namespace odb
   }
 
   template <class T>
+  inline std::weak_ptr<T> lazy_weak_ptr<T>::
+  get_eager () const
+  {
+    return p_;
+  }
+
+  template <class T>
   template <class DB, class ID>
   inline lazy_weak_ptr<T>::
   lazy_weak_ptr (DB& db, const ID& id): i_ (db, id) {}
diff --git a/odb/tr1/lazy-ptr.hxx b/odb/tr1/lazy-ptr.hxx
index d877998..5e040cf 100644
--- a/odb/tr1/lazy-ptr.hxx
+++ b/odb/tr1/lazy-ptr.hxx
@@ -98,6 +98,11 @@ namespace odb
       //
       void unload () const;
 
+      // Get the underlying eager pointer. If this is an unloaded pointer
+      // to a persistent object, then the returned pointer will be NULL.
+      //
+      std::tr1::shared_ptr<T> get_eager () const;
+
       template <class DB, class ID> lazy_shared_ptr (DB&, const ID&);
       template <class DB, class Y> lazy_shared_ptr (DB&, Y*);
       template <class DB, class Y, class D> lazy_shared_ptr (DB&, Y*, D);
@@ -207,6 +212,11 @@ namespace odb
       //
       void unload () const;
 
+      // Get the underlying eager pointer. If this is an unloaded pointer
+      // to a persistent object, then the returned pointer will be NULL.
+      //
+      std::tr1::weak_ptr<T> get_eager () const;
+
       template <class DB, class ID> lazy_weak_ptr (DB&, const ID&);
       template <class DB, class Y> lazy_weak_ptr (DB&, const std::tr1::shared_ptr<Y>&);
       template <class DB, class Y> lazy_weak_ptr (DB&, const std::tr1::weak_ptr<Y>&);
diff --git a/odb/tr1/lazy-ptr.ixx b/odb/tr1/lazy-ptr.ixx
index b33a12d..59d72c0 100644
--- a/odb/tr1/lazy-ptr.ixx
+++ b/odb/tr1/lazy-ptr.ixx
@@ -207,6 +207,13 @@ namespace odb
     }
 
     template <class T>
+    inline std::tr1::shared_ptr<T> lazy_shared_ptr<T>::
+    get_eager () const
+    {
+      return p_;
+    }
+
+    template <class T>
     template <class DB, class ID>
     inline lazy_shared_ptr<T>::
     lazy_shared_ptr (DB& db, const ID& id): i_ (db, id) {}
@@ -518,6 +525,13 @@ namespace odb
     }
 
     template <class T>
+    inline std::tr1::weak_ptr<T> lazy_weak_ptr<T>::
+    get_eager () const
+    {
+      return p_;
+    }
+
+    template <class T>
     template <class DB, class ID>
     inline lazy_weak_ptr<T>::
     lazy_weak_ptr (DB& db, const ID& id): i_ (db, id) {}
-- 
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