sqlite: Use per-thread connections

database/sqlite.h

@@ -8,14 +8,15 @@
 class Sqlite : public Database
 {
   private:
-	bool inTransaction = false;
-	std::shared_ptr<sqlite::database> db;
+	static thread_local sqlite::database *db;
 
 	template <class T> std::unique_ptr<T> create() const
 	{
-		return std::make_unique<T>(db);
+		return std::make_unique<T>(database());
 	}
 
+	sqlite::database &database() const;
+
   public:
 	Sqlite(std::string path);
 	std::unique_ptr<PageDao> createPageDao() const;
@@ -27,6 +28,7 @@ class Sqlite : public Database
 	void beginTransaction();
 	void commitTransaction();
 	void rollbackTransaction();
+	virtual ~Sqlite();
 };
 
 #endif // SQLITE_H