add macOS implementation

macos/include/filament/FilamentAPI.h

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2015 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 TNT_FILAMENT_FILAMENTAPI_H
+#define TNT_FILAMENT_FILAMENTAPI_H
+
+#include <utils/compiler.h>
+#include <utils/PrivateImplementation.h>
+
+#include <stddef.h>
+
+namespace filament {
+
+/**
+ * \privatesection
+ * FilamentAPI is used to define an API in filament.
+ * It ensures the class defining the API can't be created, destroyed
+ * or copied by the caller.
+ */
+class UTILS_PUBLIC FilamentAPI {
+protected:
+    // disallow creation on the stack
+    FilamentAPI() noexcept = default;
+    ~FilamentAPI() = default;
+
+public:
+    // disallow copy and assignment
+    FilamentAPI(FilamentAPI const&) = delete;
+    FilamentAPI(FilamentAPI&&) = delete;
+    FilamentAPI& operator=(FilamentAPI const&) = delete;
+    FilamentAPI& operator=(FilamentAPI&&) = delete;
+
+    // allow placement-new allocation, don't use "noexcept", to avoid compiler null check
+    static void *operator new     (size_t, void* p) { return p; }
+
+    // prevent heap allocation
+    static void *operator new     (size_t) = delete;
+    static void *operator new[]   (size_t) = delete;
+    static void  operator delete  (void*)  = delete;
+    static void  operator delete[](void*)  = delete;
+};
+
+template<typename T>
+using BuilderBase = utils::PrivateImplementation<T>;
+
+} // namespace filament
+
+#endif // TNT_FILAMENT_FILAMENTAPI_H