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+/*
+ * Copyright (C) 2016 Rockchip Electronics Co., Ltd.
+ * Authors:
+ *    Zhiqin Wei <wzq@rock-chips.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+#ifndef _LIBS_RGA_SINGLETON_H
+#define _LIBS_RGA_SINGLETON_H
+
+#ifndef ANDROID
+#include "RgaMutex.h"
+
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wundefined-var-template"
+#endif
+
+template <typename TYPE>
+class Singleton {
+  public:
+    static TYPE& getInstance() {
+        Mutex::Autolock _l(sLock);
+        TYPE* instance = sInstance;
+        if (instance == nullptr) {
+            instance = new TYPE();
+            sInstance = instance;
+        }
+        return *instance;
+    }
+
+    static bool hasInstance() {
+        Mutex::Autolock _l(sLock);
+        return sInstance != nullptr;
+    }
+
+  protected:
+    ~Singleton() { }
+    Singleton() { }
+
+  private:
+    Singleton(const Singleton&);
+    Singleton& operator = (const Singleton&);
+    static Mutex sLock;
+    static TYPE* sInstance;
+};
+
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
+
+#define RGA_SINGLETON_STATIC_INSTANCE(TYPE)                 \
+    template<> ::Mutex  \
+        (::Singleton< TYPE >::sLock)(::Mutex::PRIVATE);  \
+    template<> TYPE* ::Singleton< TYPE >::sInstance(nullptr);  /* NOLINT */ \
+    template class ::Singleton< TYPE >;
+
+#endif //ANDROID
+#endif //_LIBS_RGA_SINGLETON_H