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| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___CXX03___MEMORY_TEMP_VALUE_H |
| 10 | #define _LIBCPP___CXX03___MEMORY_TEMP_VALUE_H |
| 11 | |
| 12 | #include <__cxx03/__config> |
| 13 | #include <__cxx03/__memory/addressof.h> |
| 14 | #include <__cxx03/__memory/allocator_traits.h> |
| 15 | #include <__cxx03/__type_traits/aligned_storage.h> |
| 16 | #include <__cxx03/__utility/forward.h> |
| 17 | |
| 18 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 19 | # pragma GCC system_header |
| 20 | #endif |
| 21 | |
| 22 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 23 | |
| 24 | template <class _Tp, class _Alloc> |
| 25 | struct __temp_value { |
| 26 | typedef allocator_traits<_Alloc> _Traits; |
| 27 | |
| 28 | typename aligned_storage<sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)>::type __v; |
| 29 | _Alloc& __a; |
| 30 | |
| 31 | _LIBCPP_HIDE_FROM_ABI _Tp* __addr() { return reinterpret_cast<_Tp*>(std::addressof(__v)); } |
| 32 | |
| 33 | _LIBCPP_HIDE_FROM_ABI _Tp& get() { return *__addr(); } |
| 34 | |
| 35 | template <class... _Args> |
| 36 | _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_CFI __temp_value(_Alloc& __alloc, _Args&&... __args) : __a(__alloc) { |
| 37 | _Traits::construct(__a, __addr(), std::forward<_Args>(__args)...); |
| 38 | } |
| 39 | |
| 40 | _LIBCPP_HIDE_FROM_ABI ~__temp_value() { _Traits::destroy(__a, __addr()); } |
| 41 | }; |
| 42 | |
| 43 | _LIBCPP_END_NAMESPACE_STD |
| 44 | |
| 45 | #endif // _LIBCPP___CXX03___MEMORY_TEMP_VALUE_H |
| 46 |
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