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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___CXX03___MEMORY_ADDRESSOF_H11#define _LIBCPP___CXX03___MEMORY_ADDRESSOF_H12 13#include <__cxx03/__config>14 15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)16# pragma GCC system_header17#endif18 19_LIBCPP_BEGIN_NAMESPACE_STD20 21template <class _Tp>22inline _LIBCPP_NO_CFI _LIBCPP_HIDE_FROM_ABI _Tp* addressof(_Tp& __x) _NOEXCEPT {23 return __builtin_addressof(__x);24}25 26#if defined(_LIBCPP_HAS_OBJC_ARC) && !defined(_LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF)27// Objective-C++ Automatic Reference Counting uses qualified pointers28// that require special addressof() signatures. When29// _LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF is defined, the compiler30// itself is providing these definitions. Otherwise, we provide them.31template <class _Tp>32inline _LIBCPP_HIDE_FROM_ABI __strong _Tp* addressof(__strong _Tp& __x) _NOEXCEPT {33 return &__x;34}35 36# ifdef _LIBCPP_HAS_OBJC_ARC_WEAK37template <class _Tp>38inline _LIBCPP_HIDE_FROM_ABI __weak _Tp* addressof(__weak _Tp& __x) _NOEXCEPT {39 return &__x;40}41# endif42 43template <class _Tp>44inline _LIBCPP_HIDE_FROM_ABI __autoreleasing _Tp* addressof(__autoreleasing _Tp& __x) _NOEXCEPT {45 return &__x;46}47 48template <class _Tp>49inline _LIBCPP_HIDE_FROM_ABI __unsafe_unretained _Tp* addressof(__unsafe_unretained _Tp& __x) _NOEXCEPT {50 return &__x;51}52#endif53 54_LIBCPP_END_NAMESPACE_STD55 56#endif // _LIBCPP___CXX03___MEMORY_ADDRESSOF_H57