1fe6060f1SDimitry Andric // -*- C++ -*- 2fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 3fe6060f1SDimitry Andric // 4fe6060f1SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5fe6060f1SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 6fe6060f1SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7fe6060f1SDimitry Andric // 8fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 9fe6060f1SDimitry Andric 10fe6060f1SDimitry Andric #ifndef _LIBCPP___MEMORY_ADDRESSOF_H 11fe6060f1SDimitry Andric #define _LIBCPP___MEMORY_ADDRESSOF_H 12fe6060f1SDimitry Andric 13fe6060f1SDimitry Andric #include <__config> 14fe6060f1SDimitry Andric 15fe6060f1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16fe6060f1SDimitry Andric # pragma GCC system_header 17fe6060f1SDimitry Andric #endif 18fe6060f1SDimitry Andric 19fe6060f1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 20fe6060f1SDimitry Andric 21fe6060f1SDimitry Andric template <class _Tp> addressof(_Tp & __x)22*cb14a3feSDimitry Andricinline _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_NO_CFI _LIBCPP_HIDE_FROM_ABI _Tp* addressof(_Tp& __x) _NOEXCEPT { 23fe6060f1SDimitry Andric return __builtin_addressof(__x); 24fe6060f1SDimitry Andric } 25fe6060f1SDimitry Andric 26fe6060f1SDimitry Andric #if defined(_LIBCPP_HAS_OBJC_ARC) && !defined(_LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF) 27fe6060f1SDimitry Andric // Objective-C++ Automatic Reference Counting uses qualified pointers 28fe6060f1SDimitry Andric // that require special addressof() signatures. When 29fe6060f1SDimitry Andric // _LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF is defined, the compiler 30fe6060f1SDimitry Andric // itself is providing these definitions. Otherwise, we provide them. 31fe6060f1SDimitry Andric template <class _Tp> addressof(__strong _Tp & __x)32*cb14a3feSDimitry Andricinline _LIBCPP_HIDE_FROM_ABI __strong _Tp* addressof(__strong _Tp& __x) _NOEXCEPT { 33fe6060f1SDimitry Andric return &__x; 34fe6060f1SDimitry Andric } 35fe6060f1SDimitry Andric 36fe6060f1SDimitry Andric # ifdef _LIBCPP_HAS_OBJC_ARC_WEAK 37fe6060f1SDimitry Andric template <class _Tp> addressof(__weak _Tp & __x)38*cb14a3feSDimitry Andricinline _LIBCPP_HIDE_FROM_ABI __weak _Tp* addressof(__weak _Tp& __x) _NOEXCEPT { 39fe6060f1SDimitry Andric return &__x; 40fe6060f1SDimitry Andric } 41fe6060f1SDimitry Andric # endif 42fe6060f1SDimitry Andric 43fe6060f1SDimitry Andric template <class _Tp> addressof(__autoreleasing _Tp & __x)44*cb14a3feSDimitry Andricinline _LIBCPP_HIDE_FROM_ABI __autoreleasing _Tp* addressof(__autoreleasing _Tp& __x) _NOEXCEPT { 45fe6060f1SDimitry Andric return &__x; 46fe6060f1SDimitry Andric } 47fe6060f1SDimitry Andric 48fe6060f1SDimitry Andric template <class _Tp> addressof(__unsafe_unretained _Tp & __x)49*cb14a3feSDimitry Andricinline _LIBCPP_HIDE_FROM_ABI __unsafe_unretained _Tp* addressof(__unsafe_unretained _Tp& __x) _NOEXCEPT { 50fe6060f1SDimitry Andric return &__x; 51fe6060f1SDimitry Andric } 52fe6060f1SDimitry Andric #endif 53fe6060f1SDimitry Andric 54fe6060f1SDimitry Andric #if !defined(_LIBCPP_CXX03_LANG) 55*cb14a3feSDimitry Andric template <class _Tp> 56*cb14a3feSDimitry Andric _Tp* addressof(const _Tp&&) noexcept = delete; 57fe6060f1SDimitry Andric #endif 58fe6060f1SDimitry Andric 59fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 60fe6060f1SDimitry Andric 61fe6060f1SDimitry Andric #endif // _LIBCPP___MEMORY_ADDRESSOF_H 62