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___MEMORY_DESTRUCT_N_H
10#define _LIBCPP___MEMORY_DESTRUCT_N_H
11
12#include <__config>
13#include <__cstddef/size_t.h>
14#include <__type_traits/integral_constant.h>
15#include <__type_traits/is_trivially_destructible.h>
16
17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18# pragma GCC system_header
19#endif
20
21_LIBCPP_BEGIN_NAMESPACE_STD
22
23struct __destruct_n {
24private:
25 size_t __size_;
26
27 template <class _Tp>
28 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __process(_Tp* __p, false_type) _NOEXCEPT {
29 for (size_t __i = 0; __i < __size_; ++__i, ++__p)
30 __p->~_Tp();
31 }
32
33 template <class _Tp>
34 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __process(_Tp*, true_type) _NOEXCEPT {}
35
36 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __incr(false_type) _NOEXCEPT { ++__size_; }
37 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __incr(true_type) _NOEXCEPT {}
38
39 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __set(size_t __s, false_type) _NOEXCEPT { __size_ = __s; }
40 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __set(size_t, true_type) _NOEXCEPT {}
41
42public:
43 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 explicit __destruct_n(size_t __s) _NOEXCEPT : __size_(__s) {}
44
45 template <class _Tp>
46 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __incr() _NOEXCEPT {
47 __incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());
48 }
49
50 template <class _Tp>
51 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __set(size_t __s, _Tp*) _NOEXCEPT {
52 __set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());
53 }
54
55 template <class _Tp>
56 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void operator()(_Tp* __p) _NOEXCEPT {
57 __process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());
58 }
59};
60
61_LIBCPP_END_NAMESPACE_STD
62
63#endif // _LIBCPP___MEMORY_DESTRUCT_N_H
64