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65 lines
2 KiB
C
65 lines
2 KiB
C
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___MEMORY_DESTRUCT_N_H
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#define _LIBCPP___MEMORY_DESTRUCT_N_H
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#include <__config>
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#include <__type_traits/integral_constant.h>
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#include <__type_traits/is_trivially_destructible.h>
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#include <cstddef>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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struct __destruct_n
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{
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private:
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size_t __size_;
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template <class _Tp>
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_LIBCPP_INLINE_VISIBILITY void __process(_Tp* __p, false_type) _NOEXCEPT
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{for (size_t __i = 0; __i < __size_; ++__i, ++__p) __p->~_Tp();}
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template <class _Tp>
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_LIBCPP_INLINE_VISIBILITY void __process(_Tp*, true_type) _NOEXCEPT
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{}
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_LIBCPP_INLINE_VISIBILITY void __incr(false_type) _NOEXCEPT
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{++__size_;}
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_LIBCPP_INLINE_VISIBILITY void __incr(true_type) _NOEXCEPT
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{}
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_LIBCPP_INLINE_VISIBILITY void __set(size_t __s, false_type) _NOEXCEPT
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{__size_ = __s;}
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_LIBCPP_INLINE_VISIBILITY void __set(size_t, true_type) _NOEXCEPT
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{}
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public:
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_LIBCPP_INLINE_VISIBILITY explicit __destruct_n(size_t __s) _NOEXCEPT
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: __size_(__s) {}
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template <class _Tp>
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_LIBCPP_INLINE_VISIBILITY void __incr() _NOEXCEPT
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{__incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());}
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template <class _Tp>
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_LIBCPP_INLINE_VISIBILITY void __set(size_t __s, _Tp*) _NOEXCEPT
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{__set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());}
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template <class _Tp>
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_LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) _NOEXCEPT
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{__process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());}
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};
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___MEMORY_DESTRUCT_N_H
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