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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the BastionOS freestanding C++ standard library.
//
// Declares placement new and related facilities.
// The actual operator new/delete are defined in cxxabi.cpp.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBBASTION_NEW
#define _LIBBASTION_NEW
#include <__config>
#include <cstddef>
_LIBBASTION_BEGIN_NAMESPACE_STD
struct nothrow_t { explicit nothrow_t() = default; };
inline constexpr nothrow_t nothrow{};
enum class align_val_t : size_t {};
// launder
template<class _Tp>
_LIBBASTION_NODISCARD inline constexpr _Tp* launder(_Tp* __p) noexcept {
return __builtin_launder(__p);
}
// hardware_destructive_interference_size / hardware_constructive_interference_size
#ifdef __GCC_DESTRUCTIVE_SIZE
inline constexpr size_t hardware_destructive_interference_size = __GCC_DESTRUCTIVE_SIZE;
inline constexpr size_t hardware_constructive_interference_size = __GCC_CONSTRUCTIVE_SIZE;
#else
inline constexpr size_t hardware_destructive_interference_size = 64;
inline constexpr size_t hardware_constructive_interference_size = 64;
#endif
_LIBBASTION_END_NAMESPACE_STD
// Placement new/delete — these must be at global scope.
// Guard against redefinition from cxxabi.cpp or compiler headers.
#ifndef _LIBBASTION_PLACEMENT_NEW_DEFINED
#define _LIBBASTION_PLACEMENT_NEW_DEFINED
_LIBBASTION_NODISCARD inline void* operator new(std::size_t, void* __p) noexcept { return __p; }
_LIBBASTION_NODISCARD inline void* operator new[](std::size_t, void* __p) noexcept { return __p; }
inline void operator delete(void*, void*) noexcept {}
inline void operator delete[](void*, void*) noexcept {}
#endif
#endif // _LIBBASTION_NEW
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