Add Polymorphic Memory Resource utilities and rework the separately compiled library:

- Dlmalloc's based C function are boost_cont_xxx no longer exported, but wrapped into C++ linkage dlmalloc_xxx functions to effectively reuse Boost's dynamic library and autolink machinery instead of rewriting machinery to compile the C source file.
- Refactored scoped_allocator_adaptor's construct logic as it was shared with polymorphic allocator's one. Moved common logic to detail/dispatch_uses_allocator.hpp. Refactored also scoped_allocator_adaptor test utilities to be reused with polymorphic_allocator tests.

src/unsynchronized_pool_resource.cpp

@@ -0,0 +1,79 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (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.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#define BOOST_CONTAINER_SOURCE
+#include <boost/container/detail/config_begin.hpp>
+#include <boost/container/detail/workaround.hpp>
+
+#include <boost/container/pmr/unsynchronized_pool_resource.hpp>
+
+namespace boost {
+namespace container {
+namespace pmr {
+
+unsynchronized_pool_resource::unsynchronized_pool_resource(const pool_options& opts, memory_resource* upstream) BOOST_NOEXCEPT
+   : m_resource(opts, upstream)
+{}
+
+unsynchronized_pool_resource::unsynchronized_pool_resource() BOOST_NOEXCEPT
+   : m_resource()
+{}
+
+unsynchronized_pool_resource::unsynchronized_pool_resource(memory_resource* upstream) BOOST_NOEXCEPT
+   : m_resource(upstream)
+{}
+
+unsynchronized_pool_resource::unsynchronized_pool_resource(const pool_options& opts) BOOST_NOEXCEPT
+   : m_resource(opts)
+{}
+
+unsynchronized_pool_resource::~unsynchronized_pool_resource() //virtual
+{}
+
+void unsynchronized_pool_resource::release()
+{
+   m_resource.release();
+}
+
+memory_resource* unsynchronized_pool_resource::upstream_resource() const
+{  return m_resource.upstream_resource();  }
+
+pool_options unsynchronized_pool_resource::options() const
+{  return m_resource.options();  }
+
+void* unsynchronized_pool_resource::do_allocate(std::size_t bytes, std::size_t alignment) //virtual
+{  return m_resource.do_allocate(bytes, alignment);  }
+
+void unsynchronized_pool_resource::do_deallocate(void* p, std::size_t bytes, std::size_t alignment) //virtual
+{  return m_resource.do_deallocate(p, bytes, alignment);  }
+
+bool unsynchronized_pool_resource::do_is_equal(const memory_resource& other) const BOOST_NOEXCEPT //virtual
+{  return this == dynamic_cast<const unsynchronized_pool_resource*>(&other);  }
+
+std::size_t unsynchronized_pool_resource::pool_count() const
+{  return m_resource.pool_count();  }
+
+std::size_t unsynchronized_pool_resource::pool_index(std::size_t bytes) const
+{  return m_resource.pool_index(bytes);  }
+
+std::size_t unsynchronized_pool_resource::pool_next_blocks_per_chunk(std::size_t pool_idx) const
+{  return m_resource.pool_next_blocks_per_chunk(pool_idx);  }
+
+std::size_t unsynchronized_pool_resource::pool_block(std::size_t pool_idx) const
+{  return m_resource.pool_block(pool_idx);  }
+
+std::size_t unsynchronized_pool_resource::pool_cached_blocks(std::size_t pool_idx) const
+{  return m_resource.pool_cached_blocks(pool_idx);  }
+
+}  //namespace pmr {
+}  //namespace container {
+}  //namespace boost {
+
+#include <boost/container/detail/config_end.hpp>