1 files changed, 74 insertions, 0 deletions
diff --git a/src/libjin/common/subsystem.hpp b/src/libjin/common/subsystem.hpp
new file mode 100644
index 0000000..9828c40
--- /dev/null
+++ b/src/libjin/common/subsystem.hpp
@@ -0,0 +1,74 @@
+#ifndef __JE_COMMON_SUBSYSTEM_H__
+#define __JE_COMMON_SUBSYSTEM_H__
+
+#include "../utils/macros.h"
+
+#include "singleton.hpp"
+
+namespace JinEngine
+{
+
+    ///
+    /// Subsystem class.
+    ///
+    template<class System>
+    class Subsystem : public Singleton<System>
+    {
+    public: 
+        ///
+        /// Subsystem setting.
+        ///
+        struct Setting 
+        {
+        }; 
+
+        typedef Setting SettingBase; 
+
+        ///
+        /// Initialize subsystem.
+        /// 
+        /// @param setting Subsystem setting.
+        /// @return True if initialize sucessful, otherwise return false.
+        ///
+        bool start(const SettingBase* setting = nullptr)
+        {
+            static bool success = startSystem(setting);
+            return success;
+        }
+
+        ///
+        /// Quit subsystem.
+        ///
+        void quit()
+        {
+            // Call only once.
+            static char __dummy__ = (quitSystem(), 1);
+            Singleton<System>::destroy();
+        }
+
+        ///
+        /// Subsystem constructor.
+        ///
+        Subsystem() {};
+
+        /// 
+        /// Subsystem destructor.
+        ///
+        virtual ~Subsystem() {}
+
+    protected:
+        ///
+        /// Initializer callback.
+        ///
+        virtual bool startSystem(const Setting* setting) = 0;
+
+        ///
+        /// Quit subsystem callback.
+        ///
+        virtual void quitSystem() = 0;
+
+    };
+
+} // namespace JinEngine
+
+#endif
+\ No newline at end of file