mirror of
https://github.com/ncblakely/GiantsTools
synced 2024-11-24 07:05:37 +01:00
65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
//--------------------------------------------------------------------------------------
|
|
// File: AlignedNew.h
|
|
//
|
|
// Copyright (c) Microsoft Corporation. All rights reserved.
|
|
// Licensed under the MIT License.
|
|
//
|
|
// http://go.microsoft.com/fwlink/?LinkId=248929
|
|
// http://go.microsoft.com/fwlink/?LinkID=615561
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
#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);
|
|
}
|
|
};
|
|
}
|