template project, first version

DirectXTK/Src/AlignedNew.h

@@ -0,0 +1,67 @@
+//--------------------------------------------------------------------------------------
+// File: AlignedNew.h
+//
+// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
+// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
+// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
+// PARTICULAR PURPOSE.
+//
+// Copyright (c) Microsoft Corporation. All rights reserved.
+//
+// http://go.microsoft.com/fwlink/?LinkId=248929
+//--------------------------------------------------------------------------------------
+
+#pragma once
+
+#include <malloc.h>
+#include <exception>
+
+
+namespace DirectX
+{
+    // Derive from this to customize operator new and delete for
+    // types that have special heap alignment requirements.
+    //
+    // Example usage:
+    //
+    //      __declspec(align(16)) struct MyAlignedType : public AlignedNew<MyAlignedType>
+
+    template<typename TDerived>
+    struct AlignedNew
+    {
+        // Allocate aligned memory.
+        static void* operator new (size_t size)
+        {
+            const size_t alignment = __alignof(TDerived);
+
+            static_assert(alignment > 8, "AlignedNew is only useful for types with > 8 byte alignment. Did you forget a __declspec(align) on TDerived?");
+
+            void* ptr = _aligned_malloc(size, alignment);
+
+            if (!ptr)
+                throw std::bad_alloc();
+
+            return ptr;
+        }
+
+
+        // Free aligned memory.
+        static void operator delete (void* ptr)
+        {
+            _aligned_free(ptr);
+        }
+
+
+        // Array overloads.
+        static void* operator new[] (size_t size)
+        {
+            return operator new(size);
+        }
+
+
+        static void operator delete[] (void* ptr)
+        {
+            operator delete(ptr);
+        }
+    };
+}