From 1896d36996ab48ed7271e855d7e32b4e61f64896 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 23 Apr 2012 16:48:00 +0200
Subject: Polymorphic inheritance support

---
 odb/polymorphic-map.txx | 72 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 odb/polymorphic-map.txx

(limited to 'odb/polymorphic-map.txx')

diff --git a/odb/polymorphic-map.txx b/odb/polymorphic-map.txx
new file mode 100644
index 0000000..7b1b81a
--- /dev/null
+++ b/odb/polymorphic-map.txx
@@ -0,0 +1,72 @@
+// file      : odb/polymorphic-map.txx
+// copyright : Copyright (c) 2005-2012 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#include <odb/exceptions.hxx> // no_type_info
+
+namespace odb
+{
+  //
+  // polymorphic_map
+  //
+
+  template <typename R>
+  const typename polymorphic_map<R>::info_type& polymorphic_map<R>::
+  find (const std::type_info& t) const
+  {
+    typename type_map::const_iterator i (type_map_.find (&t));
+
+    if (i != type_map_.end ())
+      return *i->second;
+    else
+      throw no_type_info ();
+  }
+
+  template <typename R>
+  const typename polymorphic_map<R>::info_type& polymorphic_map<R>::
+  find (const discriminator_type& d) const
+  {
+    typename discriminator_map::const_iterator i (
+      discriminator_map_.find (&d));
+
+    if (i != discriminator_map_.end ())
+      return *i->second;
+    else
+      throw no_type_info ();
+  }
+
+  //
+  // polymorphic_entry_impl
+  //
+
+  template <typename R>
+  void polymorphic_entry_impl<R>::
+  insert (const info_type& i)
+  {
+    polymorphic_map<root_type>*& pm (root_traits::map);
+
+    if (pm == 0)
+      pm = new polymorphic_map<root_type>;
+    else
+      pm->ref_count_++;
+
+    pm->type_map_[&i.type] = &i;
+    pm->discriminator_map_[&i.discriminator] = &i;
+  }
+
+  template <typename R>
+  void polymorphic_entry_impl<R>::
+  erase (const info_type& i)
+  {
+    polymorphic_map<root_type>*& pm (root_traits::map);
+
+    pm->discriminator_map_.erase (&i.discriminator);
+    pm->type_map_.erase (&i.type);
+
+    if (--pm->ref_count_ == 0)
+    {
+      delete pm;
+      pm = 0;
+    }
+  }
+}
-- 
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