update

Signed-off-by: chai <chaifix@163.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/src/libjin/common/singleton.h b/src/libjin/common/singleton.h
index e6326b2..a6c7d6d 100644
--- a/src/libjin/common/singleton.h
+++ b/src/libjin/common/singleton.h
@@ -21,7 +21,7 @@ namespace jin
     protected:
         Singleton() {};
         virtual ~Singleton() {};
-    private: 
+    private:
         Singleton(const Singleton&);
         Singleton& operator = (const Singleton&);
 
@@ -29,6 +29,10 @@ namespace jin
     };
 
     template<class T> T* Singleton<T>::_instance = nullptr;
+
+#define SINGLETON(T) \
+    friend Singleton<T>
+
 }
 
 #endif
\ No newline at end of file