Add helper class that uses aligned allocation

build/pomdog.gyp

@@ -314,6 +314,7 @@
       '../src/Signals/ConnectionList.cpp',
       '../src/Signals/EventQueue.cpp',
       '../src/Signals/ScopedConnection.cpp',
+      '../src/Utility/AlignedNew.hpp',
       '../src/Utility/CRC32.cpp',
       '../src/Utility/Noncopyable.hpp',
       '../src/Utility/PathHelper.cpp',

build/pomdog.xcodeproj/project.pbxproj

@@ -594,6 +594,7 @@
 		A9AE680DD0E3FCEA11AF8F48 /* FloatingPointVector4.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = FloatingPointVector4.cpp; sourceTree = "<group>"; };
 		A9D18E8B1CA426FA0011A6CE /* MetalCompiler.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = MetalCompiler.hpp; sourceTree = "<group>"; };
 		A9D18E8C1CA427270011A6CE /* MetalCompiler.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = MetalCompiler.cpp; sourceTree = "<group>"; };
+		A9FC99071DC3D89300C78D63 /* AlignedNew.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = AlignedNew.hpp; sourceTree = "<group>"; };
 		AA4220AFBD6F377F07163A1E /* EffectAnnotation.hpp */ = {isa = PBXFileReference; lastKnownFileType = text; path = EffectAnnotation.hpp; sourceTree = "<group>"; };
 		ABEE70990030BA68A5F9002D /* PipelineStateGL4.hpp */ = {isa = PBXFileReference; lastKnownFileType = text; path = PipelineStateGL4.hpp; sourceTree = "<group>"; };
 		AC349E78729FC3024C1BC5D9 /* Assert.hpp */ = {isa = PBXFileReference; lastKnownFileType = text; path = Assert.hpp; sourceTree = "<group>"; };
@@ -1011,6 +1012,7 @@
 		582932A6CEFF570AC75B5E15 /* Utility */ = {
 			isa = PBXGroup;
 			children = (
+				A9FC99071DC3D89300C78D63 /* AlignedNew.hpp */,
 				874BAF3803BCB9751C9574C4 /* CRC32.cpp */,
 				2749362BB85096C3C6B6347F /* Noncopyable.hpp */,
 				5DAB111727E9143A507A0C10 /* PathHelper.cpp */,

src/Utility/AlignedNew.hpp

@@ -0,0 +1,67 @@
+// Copyright (c) 2013-2016 mogemimi. Distributed under the MIT license.
+
+#pragma once
+
+#if defined(_MSC_VER)
+#include <malloc.h>
+#else
+#include <cstdlib>
+#endif
+
+namespace Pomdog {
+namespace Detail {
+
+constexpr bool IsPowerOfTwo(int x)
+{
+    return (x != 0) && ((x & (x - 1)) == 0);
+}
+
+template <typename T>
+class AlignedNew {
+public:
+    static void* operator new(size_t size)
+    {
+        constexpr size_t alignment = __alignof(T);
+        static_assert(alignment > 8, "");
+        static_assert(IsPowerOfTwo(static_cast<int>(alignment)), "Must be integer power of 2.");
+
+    #if defined(_MSC_VER)
+        auto ptr = ::_aligned_malloc(size, alignment);
+    #elif (__STDC_VERSION__ > 201112L)
+        auto ptr = std::aligned_alloc(alignment, size);
+    #else
+        void* ptr = nullptr;
+        if (posix_memalign(&ptr, alignment, size) != 0) {
+            ptr = nullptr;
+        }
+    #endif
+
+        if (nullptr == ptr) {
+            throw std::bad_alloc();
+        }
+        return ptr;
+    }
+
+    static void operator delete(void * ptr)
+    {
+    #if defined(_MSC_VER)
+        ::_aligned_free(ptr);
+    #else
+        // NOTE: When using `std::aligned_alloc` or `posix_memalign`, you can call `free(3)`.
+        free(ptr);
+    #endif
+    }
+
+    static void* operator new[](size_t size)
+    {
+        return operator new(size);
+    }
+
+    static void operator delete[](void * ptr)
+    {
+        operator delete(ptr);
+    }
+};
+
+} // namespace Detail
+} // namespace Pomdog