1 files changed, 44 insertions, 0 deletions
diff --git a/singleton.h b/singleton.h
new file mode 100644
index 0000000..b170210
--- /dev/null
+++ b/singleton.h
@@ -0,0 +1,44 @@
+#pragma once
+
+// qt
+#include <QMutex>
+#include <QSharedPointer>
+
+#define SINGLETON(type) Singleton<type>::get().data()
+
+template <class T> class Singleton
+{
+public:
+    static QSharedPointer<T> get()
+    {
+        static QMutex mtx;
+        QMutexLocker l(&mtx);
+
+        if (!m_instance)
+        {
+            m_instance.reset(
+                static_cast<T*>(T::staticMetaObject.newInstance())
+                // FIXME: deleteLater doesn't work. Crashes without it
+                ,
+                &T::deleteLater
+            );
+        }
+
+        return m_instance;
+    }
+    static void cleanup()
+    {
+        static QMutex mtx;
+        QMutexLocker l(&mtx);
+
+        m_instance.clear();
+    }
+
+    typedef QSharedPointer<T> FactorySharedPointer;
+
+private:
+    static FactorySharedPointer m_instance;
+};
+
+template <class T>
+typename Singleton<T>::FactorySharedPointer Singleton<T>::m_instance;