STL/stl/inc/new

66 строки
1.9 KiB
C++

// new standard header
// Copyright (c) Microsoft Corporation.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#pragma once
#ifndef _NEW_
#define _NEW_
#include <yvals_core.h>
#if _STL_COMPILER_PREPROCESSOR
#include <exception>
#include <vcruntime_new.h>
#pragma pack(push, _CRT_PACKING)
#pragma warning(push, _STL_WARNING_LEVEL)
#pragma warning(disable : _STL_DISABLED_WARNINGS)
_STL_DISABLE_CLANG_WARNINGS
#pragma push_macro("new")
#undef new
_STD_BEGIN
#if _HAS_CXX20
// STRUCT destroying_delete_t
struct destroying_delete_t {
explicit destroying_delete_t() = default;
};
inline constexpr destroying_delete_t destroying_delete{};
#endif // _HAS_CXX20
#if _HAS_CXX17
// FUNCTION TEMPLATE launder
template <class _Ty>
_NODISCARD constexpr _Ty* launder(_Ty* _Ptr) noexcept {
static_assert(!is_function_v<_Ty> && !is_void_v<_Ty>,
"N4727 21.6.4 [ptr.launder]/3: The program is ill-formed if T is a function type or cv void.");
return __builtin_launder(_Ptr);
}
#if defined(_M_IX86) || defined(_M_X64) || defined(_M_ARM) || defined(_M_ARM64)
inline constexpr size_t hardware_constructive_interference_size = 64;
inline constexpr size_t hardware_destructive_interference_size = 64;
#else // ^^^ supported hardware ^^^ // vvv unsupported hardware vvv
#error Unsupported architecture
#endif // hardware
#endif // _HAS_CXX17
// SUPPORT TYPES
#if !defined(_INC_NEW) || !defined(_MSC_EXTENSIONS)
// handler for operator new failures
using new_handler = void(__CLRCALL_PURE_OR_CDECL*)();
#endif // !defined(_INC_NEW) || !defined(_MSC_EXTENSIONS)
// FUNCTION AND OBJECT DECLARATIONS
_CRTIMP2 new_handler __cdecl set_new_handler(_In_opt_ new_handler) noexcept;
_NODISCARD _CRTIMP2 new_handler __cdecl get_new_handler() noexcept;
_STD_END
#pragma pop_macro("new")
_STL_RESTORE_CLANG_WARNINGS
#pragma warning(pop)
#pragma pack(pop)
#endif // _STL_COMPILER_PREPROCESSOR
#endif // _NEW_