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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_MEMORY_ALIGNED_MEMORY_H_
#define BASE_MEMORY_ALIGNED_MEMORY_H_
#include <stddef.h>
#include <stdint.h>
#include <type_traits>
#include "base/base_export.h"
#include "base/compiler_specific.h"
#include "build/build_config.h"
#if defined(COMPILER_MSVC)
#include <malloc.h>
#else
#include <stdlib.h>
#endif
// A runtime sized aligned allocation can be created:
//
// float* my_array = static_cast<float*>(AlignedAlloc(size, alignment));
//
// // ... later, to release the memory:
// AlignedFree(my_array);
//
// Or using unique_ptr:
//
// std::unique_ptr<float, AlignedFreeDeleter> my_array(
// static_cast<float*>(AlignedAlloc(size, alignment)));
namespace base {
// This can be replaced with std::aligned_alloc when we have C++17.
// Caveat: std::aligned_alloc requires the size parameter be an integral
// multiple of alignment.
BASE_EXPORT void* AlignedAlloc(size_t size, size_t alignment);
inline void AlignedFree(void* ptr) {
#if defined(COMPILER_MSVC)
_aligned_free(ptr);
#else
free(ptr);
#endif
}
// Deleter for use with unique_ptr. E.g., use as
// std::unique_ptr<Foo, base::AlignedFreeDeleter> foo;
struct AlignedFreeDeleter {
inline void operator()(void* ptr) const {
AlignedFree(ptr);
}
};
} // namespace base
#endif // BASE_MEMORY_ALIGNED_MEMORY_H_
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