+extern GTypeDebugFlags _g_type_debug_flags;
+
+typedef struct _GRealClosure GRealClosure;
+struct _GRealClosure
+{
+ GClosureMarshal meta_marshal;
+ gpointer meta_marshal_data;
+ GVaClosureMarshal va_meta_marshal;
+ GVaClosureMarshal va_marshal;
+ GClosure closure;
+};
+
+#define G_REAL_CLOSURE(_c) \
+ ((GRealClosure *)G_STRUCT_MEMBER_P ((_c), -G_STRUCT_OFFSET (GRealClosure, closure)))
+