3 files changed, 20 insertions, 6 deletions
diff --git a/src/libjin/common/data.h b/src/libjin/common/data.h
index 51a3252..6f1c504 100644
--- a/src/libjin/common/data.h
+++ b/src/libjin/common/data.h
@@ -4,10 +4,10 @@
 namespace jin
 {
 
-    struct Data
+    struct Buffer
     {
-        void* data;
-        int len;
+        unsigned int len; 
+        char data[0];
     };
 
 }
diff --git a/src/libjin/common/modules.h b/src/libjin/common/modules.h
new file mode 100644
index 0000000..52b0160
--- /dev/null
+++ b/src/libjin/common/modules.h
@@ -0,0 +1,14 @@
+#ifndef __JIN_COMMON_MODULES_H
+#define __JIN_COMMON_MODULES_H
+
+#define JIN_MODULES_AUDIO 1 
+#define JIN_MODULES_RENDER 1 
+#define JIN_MODULES_DEBUG 1 
+#define JIN_MODULES_FILESYSTEM 1 
+#define JIN_MODULES_INPUT 1 
+#define JIN_MODULES_MATH 1 
+#define JIN_MODULES_NET 1 
+#define JIN_MODULES_PHYSICS 1 
+#define JIN_MODULES_TILEMAP 1 
+
+#endif
+\ No newline at end of file
diff --git a/src/libjin/common/subsystem.h b/src/libjin/common/subsystem.h
index 90e8570..35563da 100644
--- a/src/libjin/common/subsystem.h
+++ b/src/libjin/common/subsystem.h
@@ -21,7 +21,7 @@ namespace jin
 
         void quit()
         {
-            quitSystem();
+            CALLONCE(quitSystem());
             destroy();
         }
 
@@ -32,8 +32,8 @@ namespace jin
 
         SINGLETON(System);
 
-        virtual bool initSystem(const Setting* setting) = 0;
-        virtual void quitSystem() = 0;
+        virtual onlyonce bool initSystem(const Setting* setting) = 0;
+        virtual onlyonce void quitSystem() = 0;
 
     };