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.

test/memory_resource_test.cpp

@@ -0,0 +1,135 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (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.
+//
+//////////////////////////////////////////////////////////////////////////////
+#include <boost/container/pmr/memory_resource.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/core/no_exceptions_support.hpp>
+#include "derived_from_memory_resource.hpp"
+
+#include <cstdlib>
+
+using namespace boost::container;
+using namespace boost::container::pmr;
+
+void test_allocate()
+{
+   derived_from_memory_resource d;
+   memory_resource &mr = d;
+
+   d.reset();
+   BOOST_TEST(d.do_allocate_called == false);
+   BOOST_TEST(d.do_allocate_bytes == 0);
+   BOOST_TEST(d.do_allocate_alignment == 0);
+
+   mr.allocate(2, 4);
+   BOOST_TEST(d.do_allocate_called == true);
+   BOOST_TEST(d.do_allocate_bytes == 2);
+   BOOST_TEST(d.do_allocate_alignment == 4);
+}
+
+void test_deallocate()
+{
+   derived_from_memory_resource d;
+   memory_resource &mr = d;
+
+   d.reset();
+   BOOST_TEST(d.do_deallocate_called == false);
+   BOOST_TEST(d.do_deallocate_p == 0);
+   BOOST_TEST(d.do_allocate_bytes == 0);
+   BOOST_TEST(d.do_allocate_alignment == 0);
+
+   mr.deallocate(&d, 2, 4);
+   BOOST_TEST(d.do_deallocate_called == true);
+   BOOST_TEST(d.do_deallocate_p == &d);
+   BOOST_TEST(d.do_deallocate_bytes == 2);
+   BOOST_TEST(d.do_deallocate_alignment == 4);
+}
+
+void test_destructor()
+{
+   {
+   derived_from_memory_resource d;
+   d.reset();
+   BOOST_TEST(derived_from_memory_resource::destructor_called == false);
+   }
+   BOOST_TEST(derived_from_memory_resource::destructor_called == true);
+}
+
+void test_is_equal()
+{
+   derived_from_memory_resource d;
+   memory_resource &mr = d;
+
+   d.reset();
+   BOOST_TEST(d.do_is_equal_called == false);
+   BOOST_TEST(d.do_is_equal_other == 0);
+
+   mr.is_equal(d);
+   BOOST_TEST(d.do_is_equal_called == true);
+   BOOST_TEST(d.do_is_equal_other == &d);
+}
+
+void test_equality_operator()
+{
+   derived_from_memory_resource d;
+   memory_resource &mr = d;
+
+   d.reset();
+   BOOST_TEST(d.do_is_equal_called == false);
+   BOOST_TEST(d.do_is_equal_other == 0);
+
+   //equal addresses are shorcircuited
+   BOOST_TEST((mr == mr) == true);
+   BOOST_TEST(d.do_is_equal_called == false);
+   BOOST_TEST(d.do_is_equal_other == 0);
+
+   //unequal addresses are dispatched to is_equal which in turn calls do_is_equal
+   derived_from_memory_resource d2(1);
+   d.reset();
+   d2.reset();
+   memory_resource &mr2 = d2;
+   BOOST_TEST((mr == mr2) == false);
+   BOOST_TEST(d.do_is_equal_called == true);
+   BOOST_TEST(d.do_is_equal_other == &d2);
+}
+
+void test_inequality_operator()
+{
+   derived_from_memory_resource d;
+   memory_resource &mr = d;
+
+   d.reset();
+   BOOST_TEST(d.do_is_equal_called == false);
+   BOOST_TEST(d.do_is_equal_other == 0);
+
+   //equal addresses are shorcircuited
+   BOOST_TEST((mr != mr) == false);
+   BOOST_TEST(d.do_is_equal_called == false);
+   BOOST_TEST(d.do_is_equal_other == 0);
+
+   //unequal addresses are dispatched to is_equal which in turn calls do_is_equal
+   derived_from_memory_resource d2(1);
+   d.reset();
+   d2.reset();
+   memory_resource &mr2 = d2;
+   BOOST_TEST((mr != mr2) == true);
+   BOOST_TEST(d.do_is_equal_called == true);
+   BOOST_TEST(d.do_is_equal_other == &d2);
+}
+
+int main()
+{
+   test_destructor();
+   test_allocate();
+   test_deallocate();
+   test_is_equal();
+   test_equality_operator();
+   test_inequality_operator();
+   return ::boost::report_errors();
+}