From 08c1e93fa36a49f49325a07fe91ff92c964c2b6c Mon Sep 17 00:00:00 2001
From: Chanho Park <chanho61.park@samsung.com>
Date: Thu, 11 Dec 2014 18:55:56 +0900
Subject: Imported Upstream version 1.57.0

---
 boost/intrusive/detail/generic_hook.hpp | 198 +++++++++++++++++---------------
 1 file changed, 103 insertions(+), 95 deletions(-)

(limited to 'boost/intrusive/detail/generic_hook.hpp')

diff --git a/boost/intrusive/detail/generic_hook.hpp b/boost/intrusive/detail/generic_hook.hpp
index 5ddd52074e..c5af081d65 100644
--- a/boost/intrusive/detail/generic_hook.hpp
+++ b/boost/intrusive/detail/generic_hook.hpp
@@ -1,6 +1,6 @@
 /////////////////////////////////////////////////////////////////////////////
 //
-// (C) Copyright Ion Gaztanaga 2007-2012
+// (C) Copyright Ion Gaztanaga 2007-2013
 //
 // Distributed under the Boost Software License, Version 1.0.
 //    (See accompanying file LICENSE_1_0.txt or copy at
@@ -13,139 +13,147 @@
 #ifndef BOOST_INTRUSIVE_GENERIC_HOOK_HPP
 #define BOOST_INTRUSIVE_GENERIC_HOOK_HPP
 
-#include <boost/intrusive/detail/config_begin.hpp>
-#include <boost/intrusive/intrusive_fwd.hpp>
+#if defined(_MSC_VER)
+#  pragma once
+#endif
+
 #include <boost/intrusive/pointer_traits.hpp>
 #include <boost/intrusive/link_mode.hpp>
-#include <boost/intrusive/detail/utilities.hpp>
 #include <boost/intrusive/detail/mpl.hpp>
-#include <boost/intrusive/pointer_traits.hpp>
+#include <boost/intrusive/detail/assert.hpp>
+#include <boost/intrusive/detail/node_holder.hpp>
 #include <boost/static_assert.hpp>
 
 namespace boost {
 namespace intrusive {
-namespace detail {
 
 /// @cond
 
-enum
-{  NoBaseHook
-,  ListBaseHook
-,  SlistBaseHook
-,  SetBaseHook
-,  UsetBaseHook
-,  SplaySetBaseHook
-,  AvlSetBaseHook
-,  BsSetBaseHook
-,  AnyBaseHook
-};
-
-struct no_default_definer{};
+namespace detail {
 
-template <class Hook, unsigned int>
-struct default_definer;
+template <link_mode_type LinkMode>
+struct link_dispatch
+{};
+
+template<class Hook>
+void destructor_impl(Hook &hook, detail::link_dispatch<safe_link>)
+{  //If this assertion raises, you might have destroyed an object
+   //while it was still inserted in a container that is alive.
+   //If so, remove the object from the container before destroying it.
+   (void)hook; BOOST_INTRUSIVE_SAFE_HOOK_DESTRUCTOR_ASSERT(!hook.is_linked());
+}
+
+template<class Hook>
+void destructor_impl(Hook &hook, detail::link_dispatch<auto_unlink>)
+{  hook.unlink();  }
+
+template<class Hook>
+void destructor_impl(Hook &, detail::link_dispatch<normal_link>)
+{}
+
+}  //namespace detail {
+
+enum base_hook_type
+{  NoBaseHookId
+,  ListBaseHookId
+,  SlistBaseHookId
+,  RbTreeBaseHookId
+,  HashBaseHookId
+,  AvlTreeBaseHookId
+,  BsTreeBaseHookId
+,  TreapTreeBaseHookId
+,  AnyBaseHookId
+};
 
-template <class Hook>
-struct default_definer<Hook, ListBaseHook>
-{  typedef Hook default_list_hook;  };
 
-template <class Hook>
-struct default_definer<Hook, SlistBaseHook>
-{  typedef Hook default_slist_hook;  };
+template <class HookTags, unsigned int>
+struct hook_tags_definer{};
 
-template <class Hook>
-struct default_definer<Hook, SetBaseHook>
-{  typedef Hook default_set_hook;  };
+template <class HookTags>
+struct hook_tags_definer<HookTags, ListBaseHookId>
+{  typedef HookTags default_list_hook;  };
 
-template <class Hook>
-struct default_definer<Hook, UsetBaseHook>
-{  typedef Hook default_uset_hook;  };
+template <class HookTags>
+struct hook_tags_definer<HookTags, SlistBaseHookId>
+{  typedef HookTags default_slist_hook;  };
 
-template <class Hook>
-struct default_definer<Hook, SplaySetBaseHook>
-{  typedef Hook default_splay_set_hook;  };
+template <class HookTags>
+struct hook_tags_definer<HookTags, RbTreeBaseHookId>
+{  typedef HookTags default_rbtree_hook;  };
 
-template <class Hook>
-struct default_definer<Hook, AvlSetBaseHook>
-{  typedef Hook default_avl_set_hook;  };
+template <class HookTags>
+struct hook_tags_definer<HookTags, HashBaseHookId>
+{  typedef HookTags default_hashtable_hook;  };
 
-template <class Hook>
-struct default_definer<Hook, BsSetBaseHook>
-{  typedef Hook default_bs_set_hook;  };
+template <class HookTags>
+struct hook_tags_definer<HookTags, AvlTreeBaseHookId>
+{  typedef HookTags default_avltree_hook;  };
 
-template <class Hook>
-struct default_definer<Hook, AnyBaseHook>
-{  typedef Hook default_any_hook;  };
+template <class HookTags>
+struct hook_tags_definer<HookTags, BsTreeBaseHookId>
+{  typedef HookTags default_bstree_hook;  };
 
-template <class Hook, unsigned int BaseHookType>
-struct make_default_definer
-{
-   typedef typename detail::if_c
-      < BaseHookType != 0
-      , default_definer<Hook, BaseHookType>
-      , no_default_definer>::type type;
-};
+template <class HookTags>
+struct hook_tags_definer<HookTags, AnyBaseHookId>
+{  typedef HookTags default_any_hook;  };
 
 template
-   < class GetNodeAlgorithms
+   < class NodeTraits
    , class Tag
    , link_mode_type LinkMode
-   , int HookType
+   , base_hook_type BaseHookType
    >
-struct make_node_holder
+struct hooktags_impl
 {
-   typedef typename detail::if_c
-      <!detail::is_same<Tag, member_tag>::value
-      , detail::node_holder
-         < typename GetNodeAlgorithms::type::node
-         , Tag
-         , LinkMode
-         , HookType>
-      , typename GetNodeAlgorithms::type::node
-      >::type type;
+   static const link_mode_type link_mode = LinkMode;
+   typedef Tag tag;
+   typedef NodeTraits node_traits;
+   static const bool is_base_hook = !detail::is_same<Tag, member_tag>::value;
+   static const bool safemode_or_autounlink = is_safe_autounlink<link_mode>::value;
+   static const unsigned int type = BaseHookType;
 };
 
 /// @endcond
 
 template
-   < class GetNodeAlgorithms
+   < class NodeAlgorithms
    , class Tag
    , link_mode_type LinkMode
-   , int HookType
+   , base_hook_type BaseHookType
    >
 class generic_hook
    /// @cond
-
-   //If the hook is a base hook, derive generic hook from detail::node_holder
+   //If the hook is a base hook, derive generic hook from node_holder
    //so that a unique base class is created to convert from the node
-   //to the type. This mechanism will be used by base_hook_traits.
+   //to the type. This mechanism will be used by bhtraits.
    //
    //If the hook is a member hook, generic hook will directly derive
    //from the hook.
-   : public make_default_definer
-      < generic_hook<GetNodeAlgorithms, Tag, LinkMode, HookType>
-      , detail::is_same<Tag, default_tag>::value*HookType
+   : public detail::if_c
+      < detail::is_same<Tag, member_tag>::value
+      , typename NodeAlgorithms::node
+      , node_holder<typename NodeAlgorithms::node, Tag, BaseHookType>
       >::type
-   , public make_node_holder<GetNodeAlgorithms, Tag, LinkMode, HookType>::type
+   //If this is the a default-tagged base hook derive from a class that 
+   //will define an special internal typedef. Containers will be able to detect this
+   //special typedef and obtain generic_hook's internal types in order to deduce
+   //value_traits for this hook.
+   , public hook_tags_definer
+      < generic_hook<NodeAlgorithms, Tag, LinkMode, BaseHookType>
+      , detail::is_same<Tag, default_tag>::value*BaseHookType>
    /// @endcond
 {
    /// @cond
-   typedef typename GetNodeAlgorithms::type           node_algorithms;
+   typedef          NodeAlgorithms                    node_algorithms;
    typedef typename node_algorithms::node             node;
    typedef typename node_algorithms::node_ptr         node_ptr;
    typedef typename node_algorithms::const_node_ptr   const_node_ptr;
 
    public:
-   struct boost_intrusive_tags
-   {
-      static const int hook_type = HookType;
-      static const link_mode_type link_mode = LinkMode;
-      typedef Tag                                           tag;
-      typedef typename GetNodeAlgorithms::type::node_traits node_traits;
-      static const bool is_base_hook = !detail::is_same<Tag, member_tag>::value;
-      static const bool safemode_or_autounlink =
-         (int)link_mode == (int)auto_unlink || (int)link_mode == (int)safe_link;
-   };
+
+   typedef hooktags_impl
+      < typename NodeAlgorithms::node_traits
+      , Tag, LinkMode, BaseHookType>                  hooktags;
 
    node_ptr this_ptr()
    {  return pointer_traits<node_ptr>::pointer_to(static_cast<node&>(*this)); }
@@ -158,14 +166,14 @@ class generic_hook
 
    generic_hook()
    {
-      if(boost_intrusive_tags::safemode_or_autounlink){
+      if(hooktags::safemode_or_autounlink){
          node_algorithms::init(this->this_ptr());
       }
    }
 
    generic_hook(const generic_hook& )
    {
-      if(boost_intrusive_tags::safemode_or_autounlink){
+      if(hooktags::safemode_or_autounlink){
          node_algorithms::init(this->this_ptr());
       }
    }
@@ -176,7 +184,7 @@ class generic_hook
    ~generic_hook()
    {
       destructor_impl
-         (*this, detail::link_dispatch<boost_intrusive_tags::link_mode>());
+         (*this, detail::link_dispatch<hooktags::link_mode>());
    }
 
    void swap_nodes(generic_hook &other)
@@ -188,22 +196,22 @@ class generic_hook
    bool is_linked() const
    {
       //is_linked() can be only used in safe-mode or auto-unlink
-      BOOST_STATIC_ASSERT(( boost_intrusive_tags::safemode_or_autounlink ));
+      BOOST_STATIC_ASSERT(( hooktags::safemode_or_autounlink ));
       return !node_algorithms::unique(this->this_ptr());
    }
 
    void unlink()
    {
-      BOOST_STATIC_ASSERT(( (int)boost_intrusive_tags::link_mode == (int)auto_unlink ));
-      node_algorithms::unlink(this->this_ptr());
-      node_algorithms::init(this->this_ptr());
+      BOOST_STATIC_ASSERT(( (int)hooktags::link_mode == (int)auto_unlink ));
+      node_ptr n(this->this_ptr());
+      if(!node_algorithms::inited(n)){
+         node_algorithms::unlink(n);
+         node_algorithms::init(n);
+      }
    }
 };
 
-} //namespace detail
 } //namespace intrusive
 } //namespace boost
 
-#include <boost/intrusive/detail/config_end.hpp>
-
 #endif //BOOST_INTRUSIVE_GENERIC_HOOK_HPP
-- 
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