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xo-alloc2 xo-arena: adopt AllocHeader.hpp

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Roland Conybeare 2026-01-06 00:05:10 -05:00
commit afa2942159
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include/xo/alloc2/AllocHeader.hpp
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/** @file AllocHeader.hpp
*
* @author Roland Conybeare, Dec 2025
**/
#pragma once
#include <type_traits>
#include <cstdint>
#include <cstddef>
namespace xo {
namespace mm {
struct AllocHeader {
using repr_type = std::uintptr_t;
using size_type = std::size_t;
explicit AllocHeader(repr_type x) : repr_{x} {}
repr_type repr_;
};
static_assert(sizeof(AllocHeader) == sizeof(AllocHeader::repr_type));
static_assert(std::is_standard_layout_v<AllocHeader>);
}
}
/* end AllocHeader.hpp */