1 files changed, 139 insertions, 0 deletions
diff --git a/boost/container/detail/block_list.hpp b/boost/container/detail/block_list.hpp
new file mode 100644
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+++ b/boost/container/detail/block_list.hpp
@@ -0,0 +1,139 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2015-2015. 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/container for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_CONTAINER_DETAIL_BLOCK_LIST_HEADER
+#define BOOST_CONTAINER_DETAIL_BLOCK_LIST_HEADER
+
+#ifndef BOOST_CONFIG_HPP
+#  include <boost/config.hpp>
+#endif
+
+#if defined(BOOST_HAS_PRAGMA_ONCE)
+#  pragma once
+#endif
+
+#include <boost/container/detail/config_begin.hpp>
+#include <boost/container/detail/workaround.hpp>
+#include <boost/container/container_fwd.hpp>
+#include <boost/container/pmr/memory_resource.hpp>
+#include <boost/container/throw_exception.hpp>
+#include <boost/intrusive/circular_list_algorithms.hpp>
+#include <boost/move/detail/type_traits.hpp>
+#include <boost/assert.hpp>
+
+#include <cstddef>
+
+namespace boost {
+namespace container {
+namespace pmr {
+
+struct list_node
+{
+   list_node *next;
+   list_node *previous;
+};
+
+struct list_node_traits
+{
+   typedef list_node         node;
+   typedef list_node*        node_ptr;
+   typedef const list_node*  const_node_ptr;
+
+   static node_ptr get_next(const_node_ptr n)
+   {  return n->next;  }
+
+   static node_ptr get_previous(const_node_ptr n)
+   {  return n->previous;  }
+
+   static void set_next(const node_ptr & n, const node_ptr & next)
+   {  n->next = next;  }
+
+   static void set_previous(const node_ptr & n, const node_ptr & previous)
+   {  n->previous = previous;  }
+};
+
+struct block_list_header
+   : public list_node
+{
+   std::size_t size;
+};
+
+typedef bi::circular_list_algorithms<list_node_traits> list_algo;
+
+
+template<class DerivedFromBlockListHeader = block_list_header>
+class block_list_base
+{
+   list_node m_list;
+
+   static const std::size_t MaxAlignMinus1 = memory_resource::max_align-1u;
+
+   public:
+
+   static const std::size_t header_size = std::size_t(sizeof(DerivedFromBlockListHeader) + MaxAlignMinus1) & std::size_t(~MaxAlignMinus1);
+
+   explicit block_list_base()
+   {  list_algo::init_header(&m_list);  }
+
+   #if !defined(BOOST_NO_CXX11_DELETED_FUNCTIONS) || defined(BOOST_CONTAINER_DOXYGEN_INVOKED)
+   block_list_base(const block_list_base&) = delete;
+   block_list_base operator=(const block_list_base&) = delete;
+   #else
+   private:
+   block_list_base          (const block_list_base&);
+   block_list_base operator=(const block_list_base&);
+   public:
+   #endif
+
+   ~block_list_base()
+   {}
+
+   void *allocate(std::size_t size, memory_resource &mr)
+   {
+      if((size_t(-1) - header_size) < size)
+         throw_bad_alloc();
+      void *p = mr.allocate(size+header_size);
+      block_list_header &mb  = *::new((void*)p) DerivedFromBlockListHeader;
+      mb.size = size+header_size;
+      list_algo::link_after(&m_list, &mb);
+      return (char *)p + header_size;
+   }
+
+   void deallocate(void *p, memory_resource &mr) BOOST_NOEXCEPT
+   {
+      DerivedFromBlockListHeader *pheader = static_cast<DerivedFromBlockListHeader*>
+         (static_cast<void*>((char*)p - header_size));
+      list_algo::unlink(pheader);
+      const std::size_t size = pheader->size;
+      static_cast<DerivedFromBlockListHeader*>(pheader)->~DerivedFromBlockListHeader();
+      mr.deallocate(pheader, size, memory_resource::max_align);
+   }
+
+   void release(memory_resource &mr) BOOST_NOEXCEPT
+   {
+      list_node *n = list_algo::node_traits::get_next(&m_list);
+      while(n != &m_list){
+         DerivedFromBlockListHeader &d = static_cast<DerivedFromBlockListHeader&>(*n);
+         n = list_algo::node_traits::get_next(n);
+         std::size_t size = d.size;
+         d.~DerivedFromBlockListHeader();
+         mr.deallocate(reinterpret_cast<char*>(&d), size, memory_resource::max_align);         
+      }
+      list_algo::init_header(&m_list);
+   }
+};
+
+}  //namespace pmr {
+}  //namespace container {
+}  //namespace boost {
+
+#include <boost/container/detail/config_end.hpp>
+
+#endif   //BOOST_CONTAINER_DETAIL_BLOCK_LIST_HEADER