+
+ExtensionItem::ExtensionItem(const std::string& Key, Module* mod) : key(Key), owner(mod)
+{
+}
+
+void* ExtensionItem::get_raw(const Extensible* container)
+{
+ ExtensibleStore::const_iterator i = container->extensions.find(key);
+ if (i == container->extensions.end())
+ return NULL;
+ return i->second;
+}
+
+void* ExtensionItem::set_raw(Extensible* container, void* value)
+{
+ std::pair<ExtensibleStore::iterator,bool> rv =
+ container->extensions.insert(std::make_pair(key, value));
+ if (rv.second)
+ {
+ return NULL;
+ }
+ else
+ {
+ void* old = rv.first->second;
+ rv.first->second = value;
+ return old;
+ }
+}
+
+void* ExtensionItem::unset_raw(Extensible* container)
+{
+ ExtensibleStore::iterator i = container->extensions.find(key);
+ if (i == container->extensions.end())
+ return NULL;
+ void* rv = i->second;
+ container->extensions.erase(i);
+ return rv;
+}
+
+bool Extensible::Register(ExtensionItem* item)
+{
+ return Extensible::extension_types.insert(std::make_pair(item->key, item)).second;
+}
+
+void Extensible::UnRegister(Module* module)
+{
+ ExtensibleTypes::iterator i = extension_types.begin();
+ while (i != extension_types.end())
+ {
+ ExtensibleTypes::iterator c = i++;
+ if (c->second->owner == module)
+ extension_types.erase(c);
+ }
+}
+
+Extensible::~Extensible()
+{
+ for(ExtensibleStore::iterator i = extensions.begin(); i != extensions.end(); ++i)
+ {
+ ExtensionItem* type = extension_types[i->first];
+ if (type)
+ type->free(i->second);
+ }
+}
+
+LocalExtItem::LocalExtItem(const std::string& Key, Module* mod) : ExtensionItem(Key, mod)
+{
+}
+
+std::string LocalExtItem::serialize(Module* requestor, const Extensible* container, void* item)
+{
+ return "";
+}
+
+void LocalExtItem::unserialize(Module* requestor, Extensible* container, const std::string& value)
+{
+}
+
+LocalIntExt::LocalIntExt(const std::string& Key, Module* mod) : LocalExtItem(Key, mod)
+{
+}
+
+intptr_t LocalIntExt::get(const Extensible* container)
+{
+ return reinterpret_cast<intptr_t>(get_raw(container));
+}
+
+intptr_t LocalIntExt::set(Extensible* container, intptr_t value)
+{
+ if (value)
+ return reinterpret_cast<intptr_t>(set_raw(container, reinterpret_cast<void*>(value)));
+ else
+ return reinterpret_cast<intptr_t>(unset_raw(container));
+}
+
+void LocalIntExt::free(void*)
+{
+}
+
+StringExtItem::StringExtItem(const std::string& Key, Module* mod) : ExtensionItem(Key, mod)
+{
+}
+
+std::string* StringExtItem::get(const Extensible* container)
+{
+ return static_cast<std::string*>(get_raw(container));
+}
+
+std::string StringExtItem::serialize(Module* requestor, const Extensible* container, void* item)
+{
+ return item ? *static_cast<std::string*>(item) : "";
+}
+
+void StringExtItem::unserialize(Module* requestor, Extensible* container, const std::string& value)
+{
+ if (value.empty())
+ unset(container);
+ else
+ set(container, value);
+}
+
+void StringExtItem::set(Extensible* container, const std::string& value)
+{
+ void* old = set_raw(container, new std::string(value));
+ delete static_cast<std::string*>(old);
+}
+
+void StringExtItem::unset(Extensible* container)
+{
+ void* old = unset_raw(container);
+ delete static_cast<std::string*>(old);
+}
+
+void StringExtItem::free(void* item)
+{
+ delete static_cast<std::string*>(item);
+}