accept the singleton pattern

C++11 guarantees thread-safe initialization

Author: noisecode3

src/Controller.hpp

@@ -26,6 +26,7 @@ class Controller : public QObject {
 
  public:
     static Controller& getInstance() {
+        // cppcheck-suppress threadsafety-threadsafety
         static Controller instance;
         return instance;
     }

src/FileManager.hpp

@@ -28,6 +28,7 @@ class FileManager : public QObject {
 
  public:
     static FileManager& getInstance() {
+        // cppcheck-suppress threadsafety-threadsafety
         static FileManager instance;
         return instance;
     }

src/Model.hpp

@@ -51,6 +51,7 @@ class Model : public QObject {
 
  public:
     static Model& getInstance() {
+        // cppcheck-suppress threadsafety-threadsafety
         static Model instance;
         return instance;
     }

src/Network.hpp

@@ -27,6 +27,7 @@ class Downloader : public QObject {
 
  public:
     static Downloader& getInstance() {
+        // cppcheck-suppress threadsafety-threadsafety
         static Downloader instance;
         return instance;
     }