+///
+typedef map<string, unique_ptr<WordList>> GlobalWordList;
+// Each thread uses its own word list, but only the one of the GUI thread is
+// used to do real work. The others are only neded to prevent simultanous
+// write access e.g. from a cloned buffer and a true document buffer.
+QThreadStorage<GlobalWordList *> theGlobalWordList;
+
+
+WordList & theWordList(string const & lang)
+{
+ if (!theGlobalWordList.hasLocalData())
+ theGlobalWordList.setLocalData(new GlobalWordList);
+ GlobalWordList & globalWordList = *theGlobalWordList.localData();
+ GlobalWordList::iterator it = globalWordList.find(lang);
+ if (it != globalWordList.end())
+ return *it->second;
+ else
+ return *(globalWordList[lang] = make_unique<WordList>());
+}
+
+