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 <__type_traits/integral_constant.h> 14#include <__type_traits/is_trivially_destructible.h> 15#include <cstddef> 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 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 void __process(_Tp*, true_type) _NOEXCEPT {} 35 36 _LIBCPP_HIDE_FROM_ABI void __incr(false_type) _NOEXCEPT { ++__size_; } 37 _LIBCPP_HIDE_FROM_ABI void __incr(true_type) _NOEXCEPT {} 38 39 _LIBCPP_HIDE_FROM_ABI void __set(size_t __s, false_type) _NOEXCEPT { __size_ = __s; } 40 _LIBCPP_HIDE_FROM_ABI void __set(size_t, true_type) _NOEXCEPT {} 41 42public: 43 _LIBCPP_HIDE_FROM_ABI explicit __destruct_n(size_t __s) _NOEXCEPT : __size_(__s) {} 44 45 template <class _Tp> 46 _LIBCPP_HIDE_FROM_ABI void __incr() _NOEXCEPT { 47 __incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>()); 48 } 49 50 template <class _Tp> 51 _LIBCPP_HIDE_FROM_ABI 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 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