Add SCons configure checks

[senf.git] / boost_ext / boost / multi_index / detail / copy_map.hpp

diff --git a/boost_ext/boost/multi_index/detail/copy_map.hpp b/boost_ext/boost/multi_index/detail/copy_map.hpp
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+/* Copyright 2003-2007 Joaquín M López Muñoz.
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or copy at
+ * http://www.boost.org/LICENSE_1_0.txt)
+ *
+ * See http://www.boost.org/libs/multi_index for library home page.
+ */
+
+#ifndef BOOST_MULTI_INDEX_DETAIL_COPY_MAP_HPP
+#define BOOST_MULTI_INDEX_DETAIL_COPY_MAP_HPP
+
+#if defined(_MSC_VER)&&(_MSC_VER>=1200)
+#pragma once
+#endif
+
+#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
+#include <algorithm>
+#include <boost/detail/no_exceptions_support.hpp>
+#include <boost/multi_index/detail/auto_space.hpp>
+#include <boost/multi_index/detail/prevent_eti.hpp>
+#include <boost/noncopyable.hpp>
+#include <cstddef>
+#include <functional>
+
+namespace boost{
+
+namespace multi_index{
+
+namespace detail{
+
+/* copy_map is used as an auxiliary structure during copy_() operations.
+ * When a container with n nodes is replicated, node_map holds the pairings
+ * between original and copied nodes, and provides a fast way to find a
+ * copied node from an original one.
+ * The semantics of the class are not simple, and no attempt has been made
+ * to enforce it: multi_index_container handles it right. On the other hand,
+ * the const interface, which is the one provided to index implementations,
+ * only allows for:
+ *   - Enumeration of pairs of (original,copied) nodes (excluding the headers),
+ *   - fast retrieval of copied nodes (including the headers.)
+ */
+
+template <typename Node>
+struct copy_map_entry
+{
+  copy_map_entry(Node* f,Node* s):first(f),second(s){}
+
+  Node* first;
+  Node* second;
+
+  bool operator<(const copy_map_entry<Node>& x)const
+  {
+    return std::less<Node*>()(first,x.first);
+  }
+};
+
+template <typename Node,typename Allocator>
+class copy_map:private noncopyable
+{
+public:
+  typedef const copy_map_entry<Node>* const_iterator;
+
+  copy_map(
+    const Allocator& al,std::size_t size,Node* header_org,Node* header_cpy):
+    al_(al),size_(size),spc(al_,size_),n(0),
+    header_org_(header_org),header_cpy_(header_cpy),released(false)
+  {}
+
+  ~copy_map()
+  {
+    if(!released){
+      for(std::size_t i=0;i<n;++i){
+        boost::detail::allocator::destroy(&(spc.data()+i)->second->value());
+        deallocate((spc.data()+i)->second);
+      }
+    }
+  }
+
+  const_iterator begin()const{return &*spc.data();}
+  const_iterator end()const{return &*(spc.data()+n);}
+
+  void clone(Node* node)
+  {
+    (spc.data()+n)->first=node;
+    (spc.data()+n)->second=&*al_.allocate(1);
+    BOOST_TRY{
+      boost::detail::allocator::construct(
+        &(spc.data()+n)->second->value(),node->value());
+    }
+    BOOST_CATCH(...){
+      deallocate((spc.data()+n)->second);
+      BOOST_RETHROW;
+    }
+    BOOST_CATCH_END
+    ++n;
+
+    if(n==size_)std::sort(&*spc.data(),&*spc.data()+size_);
+  }
+
+  Node* find(Node* node)const
+  {
+    if(node==header_org_)return header_cpy_;
+    return std::lower_bound(
+      begin(),end(),copy_map_entry<Node>(node,0))->second;
+  }
+
+  void release()
+  {
+    released=true;
+  }
+
+private:
+  typedef typename prevent_eti<
+    Allocator,
+    typename boost::detail::allocator::rebind_to<
+      Allocator,Node>::type
+  >::type                                         allocator_type;
+  typedef typename allocator_type::pointer        allocator_pointer;
+
+  allocator_type                                  al_;
+  std::size_t                                     size_;
+  auto_space<copy_map_entry<Node>,Allocator>      spc;
+  std::size_t                                     n;
+  Node*                                           header_org_;
+  Node*                                           header_cpy_;
+  bool                                            released;
+
+  void deallocate(Node* node)
+  {
+    al_.deallocate(static_cast<allocator_pointer>(node),1);
+  }
+};
+
+} /* namespace multi_index::detail */
+
+} /* namespace multi_index */
+
+} /* namespace boost */
+
+#endif