update

example/src/singleton.h

@@ -1,25 +1,18 @@
 #ifndef SINGLETON_H
 #define SINGLETON_H
 
-#include <QMutex>
-
+/**
+ * @brief The Singleton class
+ */
 template <typename T>
 class Singleton {
 public:
     static T* getInstance();
-
-private:
-    Q_DISABLE_COPY_MOVE(Singleton)
 };
 
 template <typename T>
 T* Singleton<T>::getInstance() {
-    static QMutex mutex;
-    QMutexLocker locker(&mutex);
-    static T* instance = nullptr;
-    if (instance == nullptr) {
-        instance = new T();
-    }
+    static T* instance = new T();
     return instance;
 }
 
@@ -31,10 +24,4 @@ private:                                        \
         return Singleton<Class>::getInstance(); \
 }
 
-#define HIDE_CONSTRUCTOR(Class)         \
-private:                                \
-    Class() = default;                  \
-    Class(const Class& other) = delete; \
-    Q_DISABLE_COPY_MOVE(Class);
-
 #endif // SINGLETON_H