| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___MEMORY_POINTER_SAFETY_H |
| #define _LIBCPP___MEMORY_POINTER_SAFETY_H |
| |
| #include <__config> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| #pragma GCC system_header |
| #endif |
| |
| _LIBCPP_PUSH_MACROS |
| #include <__undef_macros> |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| //enum class |
| #if defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) |
| # ifndef _LIBCPP_CXX03_LANG |
| enum class pointer_safety : unsigned char { |
| relaxed, |
| preferred, |
| strict |
| }; |
| # endif |
| #else |
| struct _LIBCPP_TYPE_VIS pointer_safety |
| { |
| enum __lx |
| { |
| relaxed, |
| preferred, |
| strict |
| }; |
| |
| __lx __v_; |
| |
| _LIBCPP_INLINE_VISIBILITY |
| pointer_safety() : __v_() {} |
| |
| _LIBCPP_INLINE_VISIBILITY |
| pointer_safety(__lx __v) : __v_(__v) {} |
| _LIBCPP_INLINE_VISIBILITY |
| operator int() const {return __v_;} |
| }; |
| #endif |
| |
| #if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) && \ |
| defined(_LIBCPP_BUILDING_LIBRARY) |
| _LIBCPP_FUNC_VIS pointer_safety get_pointer_safety() _NOEXCEPT; |
| #else |
| // This function is only offered in C++03 under ABI v1. |
| # if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) || !defined(_LIBCPP_CXX03_LANG) |
| inline _LIBCPP_INLINE_VISIBILITY |
| pointer_safety get_pointer_safety() _NOEXCEPT { |
| return pointer_safety::relaxed; |
| } |
| # endif |
| #endif |
| |
| |
| _LIBCPP_FUNC_VIS void declare_reachable(void* __p); |
| _LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n); |
| _LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n); |
| _LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p); |
| |
| template <class _Tp> |
| inline _LIBCPP_INLINE_VISIBILITY |
| _Tp* |
| undeclare_reachable(_Tp* __p) |
| { |
| return static_cast<_Tp*>(__undeclare_reachable(__p)); |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| _LIBCPP_POP_MACROS |
| |
| #endif // _LIBCPP___MEMORY_POINTER_SAFETY_H |