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-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef _LIBCPP___MEMORY_POINTER_SAFETY_H
11 #define _LIBCPP___MEMORY_POINTER_SAFETY_H
12 
13 #include <__config>
14 #include <cstddef>
15 
16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17 #pragma GCC system_header
18 #endif
19 
20 _LIBCPP_PUSH_MACROS
21 #include <__undef_macros>
22 
23 _LIBCPP_BEGIN_NAMESPACE_STD
24 
25 #if !defined(_LIBCPP_CXX03_LANG)
26 
27 enum class pointer_safety : unsigned char {
28   relaxed,
29   preferred,
30   strict
31 };
32 
33 inline _LIBCPP_INLINE_VISIBILITY
get_pointer_safety()34 pointer_safety get_pointer_safety() _NOEXCEPT {
35   return pointer_safety::relaxed;
36 }
37 
38 _LIBCPP_FUNC_VIS void declare_reachable(void* __p);
39 _LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n);
40 _LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n);
41 _LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p);
42 
43 template <class _Tp>
44 inline _LIBCPP_INLINE_VISIBILITY
45 _Tp*
undeclare_reachable(_Tp * __p)46 undeclare_reachable(_Tp* __p)
47 {
48     return static_cast<_Tp*>(__undeclare_reachable(__p));
49 }
50 
51 #endif // !C++03
52 
53 _LIBCPP_END_NAMESPACE_STD
54 
55 _LIBCPP_POP_MACROS
56 
57 #endif // _LIBCPP___MEMORY_POINTER_SAFETY_H
58