Integrate from //sandbox/mathias/donut/...@145728
SurfaceFlinger rework for new EGL driver model support.
diff --git a/include/utils/Singleton.h b/include/utils/Singleton.h
new file mode 100644
index 0000000..776f93b
--- /dev/null
+++ b/include/utils/Singleton.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * 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 ANDROID_UTILS_SINGLETON_H
+#define ANDROID_UTILS_SINGLETON_H
+
+#include <stdint.h>
+#include <sys/types.h>
+#include <utils/threads.h>
+
+namespace android {
+// ---------------------------------------------------------------------------
+
+template <typename TYPE>
+class Singleton
+{
+public:
+ static TYPE& getInstance() {
+ Mutex::Autolock _l(sLock);
+ TYPE* instance = sInstance;
+ if (instance == 0) {
+ instance = new TYPE();
+ sInstance = instance;
+ }
+ return *instance;
+ }
+
+protected:
+ ~Singleton() { };
+ Singleton() { };
+
+private:
+ Singleton(const Singleton&);
+ Singleton& operator = (const Singleton&);
+ static Mutex sLock;
+ static TYPE* sInstance;
+};
+
+template<class TYPE> Mutex Singleton<TYPE>::sLock;
+template<class TYPE> TYPE* Singleton<TYPE>::sInstance(0);
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_UTILS_SINGLETON_H
+
