Allow for opset extensions (#4391)

* Allow for opset extensions

* Remove raw pointer from OpSet (#4395)

* style
Co-authored-by: Ilya Churaev <ilyachur@gmail.com>

src/ngraph/factory.hpp

@@ -77,7 +77,7 @@ namespace ngraph
         }
 
         /// \brief Create an instance for type_info
-        BASE_TYPE* create(const typename BASE_TYPE::type_info_t& type_info)
+        BASE_TYPE* create(const typename BASE_TYPE::type_info_t& type_info) const
         {
             std::lock_guard<std::mutex> guard(get_registry_mutex());
             auto it = m_factory_map.find(type_info);
@@ -86,7 +86,7 @@ namespace ngraph
 
         /// \brief Create an instance using factory for DERIVED_TYPE
         template <typename DERIVED_TYPE>
-        BASE_TYPE* create()
+        BASE_TYPE* create() const
         {
             return create(DERIVED_TYPE::type_info);
         }

src/ngraph/opsets/opset.cpp

@@ -28,7 +28,7 @@ ngraph::Node* ngraph::OpSet::create(const std::string& name) const
     auto type_info_it = m_name_type_info_map.find(name);
     return type_info_it == m_name_type_info_map.end()
                ? nullptr
-               : FactoryRegistry<Node>::get().create(type_info_it->second);
+               : m_factory_registry.create(type_info_it->second);
 }
 
 const ngraph::OpSet& ngraph::get_opset0()

src/ngraph/opsets/opset.hpp

@@ -32,6 +32,7 @@ namespace ngraph
         static std::mutex& get_mutex();
 
     public:
+        OpSet() {}
         std::set<NodeTypeInfo>::size_type size() const
         {
             std::lock_guard<std::mutex> guard(get_mutex());
@@ -45,7 +46,7 @@ namespace ngraph
             std::lock_guard<std::mutex> guard(get_mutex());
             m_op_types.insert(type_info);
             m_name_type_info_map[name] = type_info;
-            ngraph::FactoryRegistry<Node>::get().register_factory(type_info, factory);
+            m_factory_registry.register_factory(type_info, factory);
         }
 
         /// \brief Insert OP_TYPE into the opset with a special name and the default factory
@@ -94,7 +95,9 @@ namespace ngraph
             return m_op_types.find(node->get_type_info()) != m_op_types.end();
         }
 
+        ngraph::FactoryRegistry<ngraph::Node>& get_factory_registry() { return m_factory_registry; }
     protected:
+        ngraph::FactoryRegistry<ngraph::Node> m_factory_registry;
         std::set<NodeTypeInfo> m_op_types;
         std::map<std::string, NodeTypeInfo> m_name_type_info_map;
     };

test/opset1.cpp

@@ -188,6 +188,8 @@ TEST(opset, new_op)
     // Fred should be in the copy
     fred = shared_ptr<Node>(opset1_copy.create("Fred"));
     EXPECT_TRUE(fred);
+    // Fred should not be in the registry
+    ASSERT_FALSE(FactoryRegistry<Node>::get().has_factory<NewOp>());
 }
 
 TEST(opset, dump)