3 files changed, 95 insertions, 0 deletions
diff --git a/src/libjin/Common/Data.h b/src/libjin/Common/Data.h
new file mode 100644
index 0000000..6f1c504
--- /dev/null
+++ b/src/libjin/Common/Data.h
@@ -0,0 +1,15 @@
+#ifndef __JIN_COMMON_DATA_H
+#define __JIN_COMMON_DATA_H
+
+namespace jin
+{
+
+    struct Buffer
+    {
+        unsigned int len; 
+        char data[0];
+    };
+
+}
+
+#endif
+\ No newline at end of file
diff --git a/src/libjin/Common/Singleton.h b/src/libjin/Common/Singleton.h
new file mode 100644
index 0000000..a6c7d6d
--- /dev/null
+++ b/src/libjin/Common/Singleton.h
@@ -0,0 +1,38 @@
+#ifndef __JIN_SINGLETON_H
+#define __JIN_SINGLETON_H
+
+namespace jin
+{
+    template<class T>
+    class Singleton
+    {
+    public:
+        static T* get()
+        {
+            if (_instance == nullptr)
+                _instance = new T;
+            return _instance;
+        }
+        static void destroy()
+        {
+            delete _instance;
+            _instance = nullptr;
+        }
+    protected:
+        Singleton() {};
+        virtual ~Singleton() {};
+    private:
+        Singleton(const Singleton&);
+        Singleton& operator = (const Singleton&);
+
+        static T* _instance;
+    };
+
+    template<class T> T* Singleton<T>::_instance = nullptr;
+
+#define SINGLETON(T) \
+    friend Singleton<T>
+
+}
+
+#endif
+\ No newline at end of file
diff --git a/src/libjin/Common/Subsystem.h b/src/libjin/Common/Subsystem.h
new file mode 100644
index 0000000..35563da
--- /dev/null
+++ b/src/libjin/Common/Subsystem.h
@@ -0,0 +1,42 @@
+#ifndef __JIN_COMMON_SUBSYSTEM_H
+#define __JIN_COMMON_SUBSYSTEM_H
+
+#include "singleton.h"
+#include "../utils/macros.h"
+
+namespace jin
+{
+
+    template<class System>
+    class Subsystem : public Singleton<System>
+    {
+    public: 
+        struct Setting {}; 
+        typedef Setting SettingBase; 
+
+        void init(const SettingBase* setting)
+        {
+            CALLONCE(initSystem(setting));
+        }
+
+        void quit()
+        {
+            CALLONCE(quitSystem());
+            destroy();
+        }
+
+    protected:
+
+        Subsystem() {};
+        virtual ~Subsystem() {};
+
+        SINGLETON(System);
+
+        virtual onlyonce bool initSystem(const Setting* setting) = 0;
+        virtual onlyonce void quitSystem() = 0;
+
+    };
+
+}
+
+#endif
+\ No newline at end of file