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/global_resource_test.cpp

@@ -0,0 +1,116 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (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/global_resource.hpp>
+#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>
+#include <new>
+
+using namespace boost::container;
+using namespace boost::container::pmr;
+
+std::size_t allocation_count = 0;
+
+#ifdef BOOST_MSVC
+#pragma warning (push)
+#pragma warning (disable : 4290)
+#endif
+
+#if defined(BOOST_GCC) && (BOOST_GCC >= 40700) && (__cplusplus >= 201103L)
+#define BOOST_CONTAINER_NEW_EXCEPTION_SPECIFIER
+#define BOOST_CONTAINER_DELETE_EXCEPTION_SPECIFIER noexcept
+#else
+#define BOOST_CONTAINER_NEW_EXCEPTION_SPECIFIER    throw(std::bad_alloc)
+#define BOOST_CONTAINER_DELETE_EXCEPTION_SPECIFIER throw()
+#endif
+
+#if defined(BOOST_GCC) && (BOOST_GCC >= 50000)
+#pragma GCC diagnostic ignored "-Wsized-deallocation"
+#endif
+
+void* operator new[](std::size_t count) BOOST_CONTAINER_NEW_EXCEPTION_SPECIFIER
+{
+   ++allocation_count;
+   return std::malloc(count);
+}
+
+void operator delete[](void *p) BOOST_CONTAINER_DELETE_EXCEPTION_SPECIFIER
+{
+   --allocation_count;
+   return std::free(p);
+}
+
+#ifdef BOOST_MSVC
+#pragma warning (pop)
+#endif
+
+void test_new_delete_resource()
+{
+   //Make sure new_delete_resource calls new[]/delete[]
+   std::size_t memcount = allocation_count;
+   memory_resource *mr = new_delete_resource();
+   //each time should return the same pointer
+   BOOST_TEST(mr == new_delete_resource());
+   #if !defined(BOOST_CONTAINER_DYNAMIC_LINKING)  //No new delete replacement possible new_delete is a DLL
+   BOOST_TEST(memcount == allocation_count);
+   #endif
+   void *addr = mr->allocate(16, 1);
+   #if !defined(BOOST_CONTAINER_DYNAMIC_LINKING)  //No new delete replacement possible new_delete is a DLL
+   BOOST_TEST((allocation_count - memcount) == 1);
+   #endif
+   mr->deallocate(addr, 16, 1);
+   BOOST_TEST(memcount == allocation_count);
+}
+
+void test_null_memory_resource()
+{
+   //Make sure it throw or returns null
+   memory_resource *mr = null_memory_resource();
+   #if !defined(BOOST_NO_EXCEPTIONS)
+   bool bad_allocexception_thrown = false;
+   try{
+      mr->allocate(1, 1);
+   }
+   catch(std::bad_alloc&) {
+      bad_allocexception_thrown = true;
+   }
+   catch(...) {
+   }
+   BOOST_TEST(bad_allocexception_thrown == true);
+   #else
+   BOOST_TEST(0 == mr->allocate(1, 1));
+   #endif
+}
+
+void test_default_resource()
+{
+   //Default resource must be new/delete before set_default_resource
+   BOOST_TEST(get_default_resource() == new_delete_resource());
+   //Set default resource and obtain previous
+   derived_from_memory_resource d;
+   memory_resource *prev_default = set_default_resource(&d);
+   BOOST_TEST(get_default_resource() == &d);
+   //Set default resource with null, which should be new/delete
+   prev_default = set_default_resource(0);
+   BOOST_TEST(prev_default == &d);
+   BOOST_TEST(get_default_resource() == new_delete_resource());
+}
+
+int main()
+{
+   test_new_delete_resource();
+   test_null_memory_resource();
+   test_default_resource();
+   return ::boost::report_errors();
+}