mirror of git://gcc.gnu.org/git/gcc.git
1191 lines
34 KiB
C++
1191 lines
34 KiB
C++
// Experimental shared_ptr with array support -*- C++ -*-
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// Copyright (C) 2015-2016 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file experimental/bits/shared_ptr.h
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{experimental/memory}
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*/
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#ifndef _GLIBCXX_EXPERIMENTAL_SHARED_PTR_H
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#define _GLIBCXX_EXPERIMENTAL_SHARED_PTR_H 1
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#pragma GCC system_header
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#if __cplusplus <= 201103L
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# include <bits/c++14_warning.h>
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#else
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#include <memory>
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#include <experimental/type_traits>
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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namespace experimental
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{
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inline namespace fundamentals_v2
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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template<typename _Tp> class enable_shared_from_this;
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace fundamentals_v2
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} // namespace experimental
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#define __cpp_lib_experimental_shared_ptr_arrays 201406
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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/*
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* The specification of std::experimental::shared_ptr is slightly different
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* to std::shared_ptr (specifically in terms of "compatible" pointers) so
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* to implement std::experimental::shared_ptr without too much duplication
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* we make it derive from a partial specialization of std::__shared_ptr
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* using a special tag type, __libfund_v1.
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*
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* There are two partial specializations for the tag type, supporting the
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* different interfaces of the array and non-array forms.
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*/
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template <typename _Tp, bool = is_array<_Tp>::value>
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struct __libfund_v1 { using type = _Tp; };
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// helper for _Compatible
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template<typename _From_type, typename _To_type>
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struct __sp_compatible
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: is_convertible<_From_type*, _To_type*>::type
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{ };
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template<size_t _Nm, typename _Tp>
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struct __sp_compatible<_Tp[_Nm], _Tp[]>
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: true_type
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{ };
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template<size_t _Nm, typename _Tp>
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struct __sp_compatible<_Tp[_Nm], const _Tp[]>
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: true_type
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{ };
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// Partial specialization for base class of experimental::shared_ptr<T>
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// (i.e. the non-array form of experimental::shared_ptr)
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template<typename _Tp, _Lock_policy _Lp>
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class __shared_ptr<__libfund_v1<_Tp, false>, _Lp>
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: private __shared_ptr<_Tp, _Lp>
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{
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template<typename _Tp1, typename _Res = void>
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using _Compatible
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= enable_if_t<__sp_compatible<_Tp1, _Tp>::value, _Res>;
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using _Base_type = __shared_ptr<_Tp>;
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_Base_type& _M_get_base() { return *this;}
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const _Base_type& _M_get_base() const { return *this;}
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public:
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using element_type = _Tp;
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constexpr __shared_ptr() noexcept = default;
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template<typename _Tp1>
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explicit __shared_ptr(_Tp1* __p)
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: _Base_type(__p)
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{ }
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template<typename _Tp1, typename _Deleter>
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__shared_ptr(_Tp1* __p, _Deleter __d)
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: _Base_type(__p, __d)
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{ }
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template<typename _Tp1, typename _Deleter, typename _Alloc>
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__shared_ptr(_Tp1* __p, _Deleter __d, _Alloc __a)
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: _Base_type(__p, __d, __a)
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{ }
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template<typename _Deleter>
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__shared_ptr(nullptr_t __p, _Deleter __d)
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: _Base_type(__p, __d)
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{ }
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template<typename _Deleter, typename _Alloc>
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__shared_ptr(nullptr_t __p, _Deleter __d, _Alloc __a)
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: _Base_type(__p, __d, __a)
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{ }
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template<typename _Tp1>
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__shared_ptr(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r,
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element_type* __p) noexcept
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: _Base_type(__r._M_get_base(), __p)
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{ }
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__shared_ptr(const __shared_ptr&) noexcept = default;
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__shared_ptr(__shared_ptr&&) noexcept = default;
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__shared_ptr& operator=(const __shared_ptr&) noexcept = default;
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__shared_ptr& operator=(__shared_ptr&&) noexcept = default;
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~__shared_ptr() = default;
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template<typename _Tp1, typename = _Compatible<_Tp1>>
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__shared_ptr(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
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: _Base_type(__r._M_get_base())
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{ }
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template<typename _Tp1, typename = _Compatible<_Tp1>>
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__shared_ptr(__shared_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept
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: _Base_type(std::move((__r._M_get_base())))
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{ }
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template<typename _Tp1>
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explicit __shared_ptr(const __weak_ptr<__libfund_v1<_Tp1>, _Lp>& __r)
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: _Base_type(__r._M_get_base())
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{ }
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template<typename _Tp1, typename _Del, typename
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= _Compatible<remove_pointer_t<
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typename unique_ptr<_Tp1, _Del>::pointer>>>
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__shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
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: _Base_type(std::move(__r))
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{ }
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#if _GLIBCXX_USE_DEPRECATED
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// Postcondition: use_count() == 1 and __r.get() == 0
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template<typename _Tp1>
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__shared_ptr(std::auto_ptr<_Tp1>&& __r)
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: _Base_type(std::move(__r))
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{ }
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#endif
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constexpr __shared_ptr(nullptr_t) noexcept : __shared_ptr() { }
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// reset
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void
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reset() noexcept
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{ __shared_ptr(nullptr).swap(*this); }
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template<typename _Tp1>
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void
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reset(_Tp1* __p)
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{
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_GLIBCXX_DEBUG_ASSERT(__p == 0 || __p != get());
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__shared_ptr(__p).swap(*this);
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}
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template<typename _Tp1, typename _Deleter>
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void
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reset(_Tp1* __p, _Deleter __d)
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{ __shared_ptr(__p, __d).swap(*this); }
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template<typename _Tp1, typename _Deleter, typename _Alloc>
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void
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reset(_Tp1* __p, _Deleter __d, _Alloc __a)
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{ __shared_ptr(__p, __d, std::move(__a)).swap(*this); }
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using _Base_type::operator*;
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using _Base_type::operator->;
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template<typename _Tp1>
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_Compatible<_Tp1, __shared_ptr&>
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operator=(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
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{
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_Base_type::operator=(__r._M_get_base());
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return *this;
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}
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template<class _Tp1>
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_Compatible<_Tp1, __shared_ptr&>
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operator=(__shared_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept
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{
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_Base_type::operator=(std::move(__r._M_get_base()));
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return *this;
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}
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template<typename _Tp1>
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_Compatible<_Tp1, __shared_ptr&>
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operator=(std::unique_ptr<_Tp1>&& __r)
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{
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_Base_type::operator=(std::move(__r));
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return *this;
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}
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#if _GLIBCXX_USE_DEPRECATED
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template<typename _Tp1>
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_Compatible<_Tp1, __shared_ptr&>
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operator=(std::auto_ptr<_Tp1>&& __r)
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{
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_Base_type::operator=(std::move(__r));
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return *this;
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}
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#endif
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void
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swap(__shared_ptr& __other) noexcept
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{ _Base_type::swap(__other); }
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template<typename _Tp1>
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bool
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owner_before(__shared_ptr<__libfund_v1<_Tp1>, _Lp> const& __rhs) const
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{ return _Base_type::owner_before(__rhs._M_get_base()); }
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template<typename _Tp1>
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bool
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owner_before(__weak_ptr<__libfund_v1<_Tp1>, _Lp> const& __rhs) const
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{ return _Base_type::owner_before(__rhs._M_get_base()); }
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using _Base_type::operator bool;
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using _Base_type::get;
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using _Base_type::unique;
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using _Base_type::use_count;
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protected:
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// make_shared not yet support for shared_ptr_arrays
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//template<typename _Alloc, typename... _Args>
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// __shared_ptr(_Sp_make_shared_tag __tag, const _Alloc& __a,
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// _Args&&... __args)
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// : _M_ptr(), _M_refcount(__tag, (_Tp*)0, __a,
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// std::forward<_Args>(__args)...)
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// {
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// void* __p = _M_refcount._M_get_deleter(typeid(__tag));
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// _M_ptr = static_cast<_Tp*>(__p);
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// __enable_shared_from_this_helper(_M_refcount, _M_ptr, _M_ptr);
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// }
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// __weak_ptr::lock()
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__shared_ptr(const __weak_ptr<__libfund_v1<_Tp>, _Lp>& __r,
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std::nothrow_t)
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: _Base_type(__r._M_get_base(), std::nothrow)
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{ }
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private:
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template<typename _Tp1, _Lock_policy _Lp1> friend class __weak_ptr;
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template<typename _Tp1, _Lock_policy _Lp1> friend class __shared_ptr;
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// TODO
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template<typename _Del, typename _Tp1, _Lock_policy _Lp1>
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friend _Del* get_deleter(const __shared_ptr<_Tp1, _Lp1>&) noexcept;
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};
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// Partial specialization for base class of experimental::shared_ptr<T[N]>
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// and experimental::shared_ptr<T[]> (i.e. the array forms).
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template<typename _Tp, _Lock_policy _Lp>
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class __shared_ptr<__libfund_v1<_Tp, true>, _Lp>
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: private __shared_ptr<remove_extent_t<_Tp>, _Lp>
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{
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public:
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using element_type = remove_extent_t<_Tp>;
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private:
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struct _Array_deleter
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{
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void
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operator()(element_type const *__p) const
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{ delete [] __p; }
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};
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template<typename _Tp1, typename _Res = void>
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using _Compatible
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= enable_if_t<__sp_compatible<_Tp1, _Tp>::value, _Res>;
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using _Base_type = __shared_ptr<element_type>;
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_Base_type& _M_get_base() { return *this;}
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const _Base_type& _M_get_base() const { return *this;}
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public:
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constexpr __shared_ptr() noexcept
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: _Base_type()
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{ }
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template<typename _Tp1>
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explicit __shared_ptr(_Tp1* __p)
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: _Base_type(__p, _Array_deleter())
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{ }
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template<typename _Tp1, typename _Deleter>
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__shared_ptr(_Tp1* __p, _Deleter __d)
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: _Base_type(__p, __d)
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{ }
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template<typename _Tp1, typename _Deleter, typename _Alloc>
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__shared_ptr(_Tp1* __p, _Deleter __d, _Alloc __a)
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: _Base_type(__p, __d, __a)
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{ }
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template<typename _Deleter>
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__shared_ptr(nullptr_t __p, _Deleter __d)
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: _Base_type(__p, __d)
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{ }
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template<typename _Deleter, typename _Alloc>
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__shared_ptr(nullptr_t __p, _Deleter __d, _Alloc __a)
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: _Base_type(__p, __d, __a)
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{ }
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template<typename _Tp1>
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__shared_ptr(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r,
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element_type* __p) noexcept
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: _Base_type(__r._M_get_base(), __p)
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{ }
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__shared_ptr(const __shared_ptr&) noexcept = default;
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__shared_ptr(__shared_ptr&&) noexcept = default;
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__shared_ptr& operator=(const __shared_ptr&) noexcept = default;
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__shared_ptr& operator=(__shared_ptr&&) noexcept = default;
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~__shared_ptr() = default;
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template<typename _Tp1, typename = _Compatible<_Tp1>>
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__shared_ptr(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
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: _Base_type(__r._M_get_base())
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{ }
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template<typename _Tp1, typename = _Compatible<_Tp1>>
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__shared_ptr(__shared_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept
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: _Base_type(std::move((__r._M_get_base())))
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{ }
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template<typename _Tp1>
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explicit __shared_ptr(const __weak_ptr<__libfund_v1<_Tp1>, _Lp>& __r)
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: _Base_type(__r._M_get_base())
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{ }
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template<typename _Tp1, typename _Del, typename
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= _Compatible<remove_pointer_t<
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typename unique_ptr<_Tp1, _Del>::pointer>>>
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__shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
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: _Base_type(std::move(__r))
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{ }
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#if _GLIBCXX_USE_DEPRECATED
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// Postcondition: use_count() == 1 and __r.get() == 0
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template<typename _Tp1>
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__shared_ptr(std::auto_ptr<_Tp1>&& __r)
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: _Base_type(std::move(__r))
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{ }
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#endif
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constexpr __shared_ptr(nullptr_t) noexcept : __shared_ptr() { }
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// reset
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void
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reset() noexcept
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{ __shared_ptr(nullptr).swap(*this); }
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template<typename _Tp1>
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void
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reset(_Tp1* __p)
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{
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_GLIBCXX_DEBUG_ASSERT(__p == 0 || __p != get());
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__shared_ptr(__p, _Array_deleter()).swap(*this);
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}
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template<typename _Tp1, typename _Deleter>
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void
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reset(_Tp1* __p, _Deleter __d)
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{ __shared_ptr(__p, __d).swap(*this); }
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template<typename _Tp1, typename _Deleter, typename _Alloc>
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void
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reset(_Tp1* __p, _Deleter __d, _Alloc __a)
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{ __shared_ptr(__p, __d, std::move(__a)).swap(*this); }
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element_type&
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operator[](ptrdiff_t i) const noexcept
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{
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_GLIBCXX_DEBUG_ASSERT(get() != 0 && i >= 0);
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return get()[i];
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}
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template<typename _Tp1>
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_Compatible<_Tp1, __shared_ptr&>
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operator=(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
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{
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_Base_type::operator=(__r._M_get_base());
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return *this;
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}
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template<class _Tp1>
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_Compatible<_Tp1, __shared_ptr&>
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operator=(__shared_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept
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{
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_Base_type::operator=(std::move(__r._M_get_base()));
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return *this;
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}
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template<typename _Tp1>
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_Compatible<_Tp1, __shared_ptr&>
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operator=(std::unique_ptr<_Tp1>&& __r)
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{
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_Base_type::operator=(std::move(__r));
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return *this;
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}
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#if _GLIBCXX_USE_DEPRECATED
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template<typename _Tp1>
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_Compatible<_Tp1, __shared_ptr&>
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operator=(std::auto_ptr<_Tp1>&& __r)
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{
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_Base_type::operator=(std::move(__r));
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return *this;
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}
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#endif
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void
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swap(__shared_ptr& __other) noexcept
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{ _Base_type::swap(__other); }
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template<typename _Tp1>
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bool
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owner_before(__shared_ptr<__libfund_v1<_Tp1>, _Lp> const& __rhs) const
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{ return _Base_type::owner_before(__rhs._M_get_base()); }
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template<typename _Tp1>
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bool
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owner_before(__weak_ptr<__libfund_v1<_Tp1>, _Lp> const& __rhs) const
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{ return _Base_type::owner_before(__rhs._M_get_base()); }
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using _Base_type::operator bool;
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using _Base_type::get;
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using _Base_type::unique;
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using _Base_type::use_count;
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protected:
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// make_shared not yet support for shared_ptr_arrays
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//template<typename _Alloc, typename... _Args>
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// __shared_ptr(_Sp_make_shared_tag __tag, const _Alloc& __a,
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// _Args&&... __args)
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// : _M_ptr(), _M_refcount(__tag, (_Tp*)0, __a,
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// std::forward<_Args>(__args)...)
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// {
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// void* __p = _M_refcount._M_get_deleter(typeid(__tag));
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// _M_ptr = static_cast<_Tp*>(__p);
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// __enable_shared_from_this_helper(_M_refcount, _M_ptr, _M_ptr);
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// }
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// __weak_ptr::lock()
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__shared_ptr(const __weak_ptr<__libfund_v1<_Tp>, _Lp>& __r,
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std::nothrow_t)
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: _Base_type(__r._M_get_base(), std::nothrow)
|
|
{ }
|
|
|
|
private:
|
|
template<typename _Tp1, _Lock_policy _Lp1> friend class __weak_ptr;
|
|
template<typename _Tp1, _Lock_policy _Lp1> friend class __shared_ptr;
|
|
|
|
// TODO
|
|
template<typename _Del, typename _Tp1, _Lock_policy _Lp1>
|
|
friend _Del* get_deleter(const __shared_ptr<_Tp1, _Lp1>&) noexcept;
|
|
};
|
|
|
|
// weak_ptr specialization for __shared_ptr array
|
|
template<typename _Tp, _Lock_policy _Lp>
|
|
class __weak_ptr<__libfund_v1<_Tp>, _Lp>
|
|
: __weak_ptr<remove_extent_t<_Tp>, _Lp>
|
|
{
|
|
template<typename _Tp1, typename _Res = void>
|
|
using _Compatible
|
|
= enable_if_t<__sp_compatible<_Tp1, _Tp>::value, _Res>;
|
|
|
|
using _Base_type = __weak_ptr<remove_extent_t<_Tp>>;
|
|
|
|
_Base_type& _M_get_base() { return *this;}
|
|
const _Base_type& _M_get_base() const { return *this; }
|
|
|
|
public:
|
|
using element_type = remove_extent_t<_Tp>;
|
|
|
|
constexpr __weak_ptr() noexcept
|
|
: _Base_type()
|
|
{ }
|
|
|
|
__weak_ptr(const __weak_ptr&) noexcept = default;
|
|
|
|
~__weak_ptr() = default;
|
|
|
|
template<typename _Tp1, typename = _Compatible<_Tp1>>
|
|
__weak_ptr(const __weak_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
|
|
: _Base_type(__r._M_get_base())
|
|
{ }
|
|
|
|
template<typename _Tp1, typename = _Compatible<_Tp1>>
|
|
__weak_ptr(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
|
|
: _Base_type(__r._M_get_base())
|
|
{ }
|
|
|
|
__weak_ptr(__weak_ptr&& __r) noexcept
|
|
: _Base_type(std::move(__r))
|
|
{ }
|
|
|
|
template<typename _Tp1, typename = _Compatible<_Tp1>>
|
|
__weak_ptr(__weak_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept
|
|
: _Base_type(std::move(__r._M_get_base()))
|
|
{ }
|
|
|
|
__weak_ptr&
|
|
operator=(const __weak_ptr& __r) noexcept = default;
|
|
|
|
template<typename _Tp1>
|
|
_Compatible<_Tp1, __weak_ptr&>
|
|
operator=(const __weak_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept
|
|
{
|
|
this->_Base_type::operator=(__r._M_get_base());
|
|
return *this;
|
|
}
|
|
|
|
template<typename _Tp1>
|
|
_Compatible<_Tp1, __weak_ptr&>
|
|
operator=(const __shared_ptr<_Tp1, _Lp>& __r) noexcept
|
|
{
|
|
this->_Base_type::operator=(__r._M_get_base());
|
|
return *this;
|
|
}
|
|
|
|
__weak_ptr&
|
|
operator=(__weak_ptr&& __r) noexcept
|
|
{
|
|
this->_Base_type::operator=(std::move(__r));
|
|
return *this;
|
|
}
|
|
|
|
template<typename _Tp1>
|
|
_Compatible<_Tp1, __weak_ptr&>
|
|
operator=(__weak_ptr<_Tp1, _Lp>&& __r) noexcept
|
|
{
|
|
this->_Base_type::operator=(std::move(__r._M_get_base()));
|
|
return *this;
|
|
}
|
|
|
|
void
|
|
swap(__weak_ptr& __other) noexcept
|
|
{ this->_Base_type::swap(__other); }
|
|
|
|
template<typename _Tp1>
|
|
bool
|
|
owner_before(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __rhs) const
|
|
{ return _Base_type::owner_before(__rhs._M_get_base()); }
|
|
|
|
template<typename _Tp1>
|
|
bool
|
|
owner_before(const __weak_ptr<__libfund_v1<_Tp1>, _Lp>& __rhs) const
|
|
{ return _Base_type::owner_before(__rhs._M_get_base()); }
|
|
|
|
__shared_ptr<__libfund_v1<_Tp>, _Lp>
|
|
lock() const noexcept // should not be element_type
|
|
{ return __shared_ptr<__libfund_v1<_Tp>, _Lp>(*this, std::nothrow); }
|
|
|
|
using _Base_type::use_count;
|
|
using _Base_type::expired;
|
|
using _Base_type::reset;
|
|
|
|
private:
|
|
// Used by __enable_shared_from_this.
|
|
void
|
|
_M_assign(element_type* __ptr,
|
|
const __shared_count<_Lp>& __refcount) noexcept
|
|
{ this->_Base_type::_M_assign(__ptr, __refcount); }
|
|
|
|
template<typename _Tp1, _Lock_policy _Lp1> friend class __shared_ptr;
|
|
template<typename _Tp1, _Lock_policy _Lp1> friend class __weak_ptr;
|
|
friend class __enable_shared_from_this<_Tp, _Lp>;
|
|
friend class experimental::enable_shared_from_this<_Tp>;
|
|
friend class enable_shared_from_this<_Tp>;
|
|
};
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
|
|
namespace experimental
|
|
{
|
|
inline namespace fundamentals_v2
|
|
{
|
|
_GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|
|
|
// 8.2.1
|
|
|
|
template<typename _Tp> class shared_ptr;
|
|
template<typename _Tp> class weak_ptr;
|
|
|
|
template<typename _Tp, _Lock_policy _Lp = __default_lock_policy>
|
|
using __shared_ptr = std::__shared_ptr<__libfund_v1<_Tp>, _Lp>;
|
|
|
|
template<typename _Tp, _Lock_policy _Lp = __default_lock_policy>
|
|
using __weak_ptr = std::__weak_ptr<__libfund_v1<_Tp>, _Lp>;
|
|
|
|
template<typename _Tp>
|
|
class shared_ptr : public __shared_ptr<_Tp>
|
|
{
|
|
template<typename _Tp1, typename _Res = void>
|
|
using _Compatible
|
|
= enable_if_t<__sp_compatible<_Tp1, _Tp>::value, _Res>;
|
|
|
|
using _Base_type = __shared_ptr<_Tp>;
|
|
|
|
public:
|
|
using element_type = typename _Base_type::element_type;
|
|
|
|
// 8.2.1.1, shared_ptr constructors
|
|
constexpr shared_ptr() noexcept = default;
|
|
|
|
template<typename _Tp1>
|
|
explicit shared_ptr(_Tp1* __p) : _Base_type(__p) { }
|
|
|
|
template<typename _Tp1, typename _Deleter>
|
|
shared_ptr(_Tp1* __p, _Deleter __d)
|
|
: _Base_type(__p, __d) { }
|
|
|
|
template<typename _Tp1, typename _Deleter, typename _Alloc>
|
|
shared_ptr(_Tp1* __p, _Deleter __d, _Alloc __a)
|
|
: _Base_type(__p, __d, __a) { }
|
|
|
|
template<typename _Deleter>
|
|
shared_ptr(nullptr_t __p, _Deleter __d)
|
|
: _Base_type(__p, __d) { }
|
|
|
|
template<typename _Deleter, typename _Alloc>
|
|
shared_ptr(nullptr_t __p, _Deleter __d, _Alloc __a)
|
|
: _Base_type(__p, __d, __a) { }
|
|
|
|
template<typename _Tp1>
|
|
shared_ptr(const shared_ptr<_Tp1>& __r, element_type* __p) noexcept
|
|
: _Base_type(__r, __p) { }
|
|
|
|
shared_ptr(const shared_ptr& __r) noexcept
|
|
: _Base_type(__r) { }
|
|
|
|
template<typename _Tp1, typename = _Compatible<_Tp1>>
|
|
shared_ptr(const shared_ptr<_Tp1>& __r) noexcept
|
|
: _Base_type(__r) { }
|
|
|
|
shared_ptr(const shared_ptr<_Tp>&& __r) noexcept
|
|
: _Base_type(std::move(__r)) { }
|
|
|
|
template<typename _Tp1, typename = _Compatible<_Tp1>>
|
|
shared_ptr(shared_ptr<_Tp1>&& __r) noexcept
|
|
: _Base_type(std::move(__r)) { }
|
|
|
|
template<typename _Tp1>
|
|
explicit shared_ptr(const weak_ptr<_Tp1>& __r)
|
|
: _Base_type(__r) { }
|
|
|
|
#if _GLIBCXX_USE_DEPRECATED
|
|
template<typename _Tp1>
|
|
shared_ptr(std::auto_ptr<_Tp1>&& __r)
|
|
: _Base_type() { } // TODO
|
|
#endif
|
|
|
|
template<typename _Tp1, typename _Del, typename
|
|
= _Compatible<remove_pointer_t<
|
|
typename unique_ptr<_Tp1, _Del>::pointer>>>
|
|
shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
|
|
: _Base_type(std::move(__r)) { }
|
|
|
|
constexpr shared_ptr(nullptr_t __p)
|
|
: _Base_type(__p) { }
|
|
|
|
// C++14 §20.8.2.2
|
|
~shared_ptr() = default;
|
|
|
|
// C++14 §20.8.2.3
|
|
shared_ptr& operator=(const shared_ptr&) noexcept = default;
|
|
|
|
template <typename _Tp1>
|
|
_Compatible<_Tp1, shared_ptr&>
|
|
operator=(const shared_ptr<_Tp1>& __r) noexcept
|
|
{
|
|
_Base_type::operator=(__r);
|
|
return *this;
|
|
}
|
|
|
|
shared_ptr&
|
|
operator=(shared_ptr&& __r) noexcept
|
|
{
|
|
_Base_type::operator=(std::move(__r));
|
|
return *this;
|
|
}
|
|
|
|
template <typename _Tp1>
|
|
_Compatible<_Tp1, shared_ptr&>
|
|
operator=(shared_ptr<_Tp1>&& __r) noexcept
|
|
{
|
|
_Base_type::operator=(std::move(__r));
|
|
return *this;
|
|
}
|
|
|
|
#if _GLIBCXX_USE_DEPRECATED
|
|
template<typename _Tp1>
|
|
_Compatible<_Tp1, shared_ptr&>
|
|
operator=(std::auto_ptr<_Tp1>&& __r)
|
|
{
|
|
__shared_ptr<_Tp>::operator=(std::move(__r));
|
|
return *this;
|
|
}
|
|
#endif
|
|
|
|
template <typename _Tp1, typename _Del>
|
|
_Compatible<_Tp1, shared_ptr&>
|
|
operator=(unique_ptr<_Tp1, _Del>&& __r)
|
|
{
|
|
_Base_type::operator=(std::move(__r));
|
|
return *this;
|
|
}
|
|
|
|
// C++14 §20.8.2.2.4
|
|
// swap & reset
|
|
// 8.2.1.2 shared_ptr observers
|
|
// in __shared_ptr
|
|
|
|
private:
|
|
template<typename _Alloc, typename... _Args>
|
|
shared_ptr(_Sp_make_shared_tag __tag, const _Alloc& __a,
|
|
_Args&&... __args)
|
|
: _Base_type(__tag, __a, std::forward<_Args>(__args)...)
|
|
{ }
|
|
|
|
template<typename _Tp1, typename _Alloc, typename... _Args>
|
|
friend shared_ptr<_Tp1>
|
|
allocate_shared(const _Alloc& __a, _Args&&... __args);
|
|
|
|
shared_ptr(const weak_ptr<_Tp>& __r, std::nothrow_t)
|
|
: _Base_type(__r, std::nothrow) { }
|
|
|
|
friend class weak_ptr<_Tp>;
|
|
};
|
|
|
|
// C++14 §20.8.2.2.7 //DOING
|
|
template<typename _Tp1, typename _Tp2>
|
|
bool operator==(const shared_ptr<_Tp1>& __a,
|
|
const shared_ptr<_Tp2>& __b) noexcept
|
|
{ return __a.get() == __b.get(); }
|
|
|
|
template<typename _Tp>
|
|
inline bool
|
|
operator==(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
|
|
{ return !__a; }
|
|
|
|
template<typename _Tp>
|
|
inline bool
|
|
operator==(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
|
|
{ return !__a; }
|
|
|
|
template<typename _Tp1, typename _Tp2>
|
|
inline bool
|
|
operator!=(const shared_ptr<_Tp1>& __a,
|
|
const shared_ptr<_Tp2>& __b) noexcept
|
|
{ return __a.get() != __b.get(); }
|
|
|
|
template<typename _Tp>
|
|
inline bool
|
|
operator!=(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
|
|
{ return (bool)__a; }
|
|
|
|
template<typename _Tp>
|
|
inline bool
|
|
operator!=(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
|
|
{ return (bool)__a; }
|
|
|
|
template<typename _Tp1, typename _Tp2>
|
|
inline bool
|
|
operator<(const shared_ptr<_Tp1>& __a,
|
|
const shared_ptr<_Tp2>& __b) noexcept
|
|
{
|
|
using __elem_t1 = typename shared_ptr<_Tp1>::element_type;
|
|
using __elem_t2 = typename shared_ptr<_Tp2>::element_type;
|
|
using _CT = common_type_t<__elem_t1*, __elem_t2*>;
|
|
return std::less<_CT>()(__a.get(), __b.get());
|
|
}
|
|
|
|
template<typename _Tp>
|
|
inline bool
|
|
operator<(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
|
|
{
|
|
using __elem_t = typename shared_ptr<_Tp>::element_type;
|
|
return std::less<__elem_t>()(__a.get(), nullptr);
|
|
}
|
|
|
|
template<typename _Tp>
|
|
inline bool
|
|
operator<(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
|
|
{
|
|
using __elem_t = typename shared_ptr<_Tp>::element_type;
|
|
return std::less<__elem_t*>()(nullptr, __a.get());
|
|
}
|
|
|
|
template<typename _Tp1, typename _Tp2>
|
|
inline bool
|
|
operator<=(const shared_ptr<_Tp1>& __a,
|
|
const shared_ptr<_Tp2>& __b) noexcept
|
|
{ return !(__b < __a); }
|
|
|
|
template<typename _Tp>
|
|
inline bool
|
|
operator<=(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
|
|
{ return !(nullptr < __a); }
|
|
|
|
template<typename _Tp>
|
|
inline bool
|
|
operator<=(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
|
|
{ return !(__a < nullptr); }
|
|
|
|
template<typename _Tp1, typename _Tp2>
|
|
inline bool
|
|
operator>(const shared_ptr<_Tp1>& __a,
|
|
const shared_ptr<_Tp2>& __b) noexcept
|
|
{ return (__b < __a); }
|
|
|
|
template<typename _Tp>
|
|
inline bool
|
|
operator>(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
|
|
{
|
|
using __elem_t = typename shared_ptr<_Tp>::element_type;
|
|
return std::less<__elem_t*>()(nullptr, __a.get());
|
|
}
|
|
|
|
template<typename _Tp>
|
|
inline bool
|
|
operator>(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
|
|
{
|
|
using __elem_t = typename shared_ptr<_Tp>::element_type;
|
|
return std::less<__elem_t*>()(__a.get(), nullptr);
|
|
}
|
|
|
|
template<typename _Tp1, typename _Tp2>
|
|
inline bool
|
|
operator>=(const shared_ptr<_Tp1>& __a,
|
|
const shared_ptr<_Tp2>& __b) noexcept
|
|
{ return !(__a < __b); }
|
|
|
|
template<typename _Tp>
|
|
inline bool
|
|
operator>=(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
|
|
{ return !(__a < nullptr); }
|
|
|
|
template<typename _Tp>
|
|
inline bool
|
|
operator>=(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
|
|
{ return !(nullptr < __a); }
|
|
|
|
// C++14 §20.8.2.2.8
|
|
template<typename _Tp>
|
|
inline void
|
|
swap(shared_ptr<_Tp>& __a, shared_ptr<_Tp>& __b) noexcept
|
|
{ __a.swap(__b); }
|
|
|
|
// 8.2.1.3, shared_ptr casts
|
|
template<typename _Tp, typename _Tp1>
|
|
inline shared_ptr<_Tp>
|
|
static_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
|
|
{
|
|
using __elem_t = typename shared_ptr<_Tp>::element_type;
|
|
return shared_ptr<_Tp>(__r, static_cast<__elem_t*>(__r.get()));
|
|
}
|
|
|
|
template<typename _Tp, typename _Tp1>
|
|
inline shared_ptr<_Tp>
|
|
dynamic_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
|
|
{
|
|
using __elem_t = typename shared_ptr<_Tp>::element_type;
|
|
if (_Tp* __p = dynamic_cast<__elem_t*>(__r.get()))
|
|
return shared_ptr<_Tp>(__r, __p);
|
|
return shared_ptr<_Tp>();
|
|
}
|
|
|
|
template<typename _Tp, typename _Tp1>
|
|
inline shared_ptr<_Tp>
|
|
const_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
|
|
{
|
|
using __elem_t = typename shared_ptr<_Tp>::element_type;
|
|
return shared_ptr<_Tp>(__r, const_cast<__elem_t*>(__r.get()));
|
|
}
|
|
|
|
template<typename _Tp, typename _Tp1>
|
|
inline shared_ptr<_Tp>
|
|
reinterpret_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
|
|
{
|
|
using __elem_t = typename shared_ptr<_Tp>::element_type;
|
|
return shared_ptr<_Tp>(__r, reinterpret_cast<__elem_t*>(__r.get()));
|
|
}
|
|
|
|
// C++14 §20.8.2.3
|
|
template<typename _Tp>
|
|
class weak_ptr : public __weak_ptr<_Tp>
|
|
{
|
|
template<typename _Tp1, typename _Res = void>
|
|
using _Compatible
|
|
= enable_if_t<__sp_compatible<_Tp1, _Tp>::value, _Res>;
|
|
|
|
using _Base_type = __weak_ptr<_Tp>;
|
|
|
|
public:
|
|
constexpr weak_ptr() noexcept = default;
|
|
|
|
template<typename _Tp1, typename = _Compatible<_Tp1>>
|
|
weak_ptr(const shared_ptr<_Tp1>& __r) noexcept
|
|
: _Base_type(__r) { }
|
|
|
|
weak_ptr(const weak_ptr&) noexcept = default;
|
|
|
|
template<typename _Tp1, typename = _Compatible<_Tp1>>
|
|
weak_ptr(const weak_ptr<_Tp1>& __r) noexcept
|
|
: _Base_type(__r) { }
|
|
|
|
weak_ptr(weak_ptr&&) noexcept = default;
|
|
|
|
template<typename _Tp1, typename = _Compatible<_Tp1>>
|
|
weak_ptr(weak_ptr<_Tp1>&& __r) noexcept
|
|
: _Base_type(std::move(__r)) { }
|
|
|
|
weak_ptr&
|
|
operator=(const weak_ptr& __r) noexcept = default;
|
|
|
|
template<typename _Tp1>
|
|
_Compatible<_Tp1, weak_ptr&>
|
|
operator=(const weak_ptr<_Tp1>& __r) noexcept
|
|
{
|
|
this->_Base_type::operator=(__r);
|
|
return *this;
|
|
}
|
|
|
|
template<typename _Tp1>
|
|
_Compatible<_Tp1, weak_ptr&>
|
|
operator=(const shared_ptr<_Tp1>& __r) noexcept
|
|
{
|
|
this->_Base_type::operator=(__r);
|
|
return *this;
|
|
}
|
|
|
|
weak_ptr&
|
|
operator=(weak_ptr&& __r) noexcept = default;
|
|
|
|
template<typename _Tp1>
|
|
_Compatible<_Tp1, weak_ptr&>
|
|
operator=(weak_ptr<_Tp1>&& __r) noexcept
|
|
{
|
|
this->_Base_type::operator=(std::move(__r));
|
|
return *this;
|
|
}
|
|
|
|
shared_ptr<_Tp>
|
|
lock() const noexcept
|
|
{ return shared_ptr<_Tp>(*this, std::nothrow); }
|
|
|
|
friend class enable_shared_from_this<_Tp>;
|
|
};
|
|
|
|
// C++14 §20.8.2.3.6
|
|
template<typename _Tp>
|
|
inline void
|
|
swap(weak_ptr<_Tp>& __a, weak_ptr<_Tp>& __b) noexcept
|
|
{ __a.swap(__b); }
|
|
|
|
/// C++14 §20.8.2.2.10
|
|
template<typename _Del, typename _Tp, _Lock_policy _Lp>
|
|
inline _Del*
|
|
get_deleter(const __shared_ptr<_Tp, _Lp>& __p) noexcept
|
|
{ return std::get_deleter<_Del>(__p); }
|
|
|
|
// C++14 §20.8.2.2.11
|
|
template<typename _Ch, typename _Tr, typename _Tp, _Lock_policy _Lp>
|
|
inline std::basic_ostream<_Ch, _Tr>&
|
|
operator<<(std::basic_ostream<_Ch, _Tr>& __os,
|
|
const __shared_ptr<_Tp, _Lp>& __p)
|
|
{
|
|
__os << __p.get();
|
|
return __os;
|
|
}
|
|
|
|
// C++14 §20.8.2.4
|
|
template<typename _Tp = void> class owner_less;
|
|
|
|
/// Partial specialization of owner_less for shared_ptr.
|
|
template<typename _Tp>
|
|
struct owner_less<shared_ptr<_Tp>>
|
|
: public _Sp_owner_less<shared_ptr<_Tp>, weak_ptr<_Tp>>
|
|
{ };
|
|
|
|
/// Partial specialization of owner_less for weak_ptr.
|
|
template<typename _Tp>
|
|
struct owner_less<weak_ptr<_Tp>>
|
|
: public _Sp_owner_less<weak_ptr<_Tp>, shared_ptr<_Tp>>
|
|
{ };
|
|
|
|
template<>
|
|
class owner_less<void>
|
|
{
|
|
template<typename _Tp, typename _Up>
|
|
bool
|
|
operator()(shared_ptr<_Tp> const& __lhs,
|
|
shared_ptr<_Up> const& __rhs) const
|
|
{ return __lhs.owner_before(__rhs); }
|
|
|
|
template<typename _Tp, typename _Up>
|
|
bool
|
|
operator()(shared_ptr<_Tp> const& __lhs,
|
|
weak_ptr<_Up> const& __rhs) const
|
|
{ return __lhs.owner_before(__rhs); }
|
|
|
|
template<typename _Tp, typename _Up>
|
|
bool
|
|
operator()(weak_ptr<_Tp> const& __lhs,
|
|
shared_ptr<_Up> const& __rhs) const
|
|
{ return __lhs.owner_before(__rhs); }
|
|
|
|
template<typename _Tp, typename _Up>
|
|
bool
|
|
operator()(weak_ptr<_Tp> const& __lhs,
|
|
weak_ptr<_Up> const& __rhs) const
|
|
{ return __lhs.owner_before(__rhs); }
|
|
|
|
typedef void is_transparent;
|
|
};
|
|
|
|
// C++14 §20.8.2.6
|
|
template<typename _Tp>
|
|
inline bool
|
|
atomic_is_lock_free(const shared_ptr<_Tp>* __p)
|
|
{ return std::atomic_is_lock_free<_Tp, __default_lock_policy>(__p); }
|
|
|
|
template<typename _Tp>
|
|
shared_ptr<_Tp> atomic_load(const shared_ptr<_Tp>* __p)
|
|
{ return std::atomic_load<_Tp>(__p); }
|
|
|
|
template<typename _Tp>
|
|
shared_ptr<_Tp>
|
|
atomic_load_explicit(const shared_ptr<_Tp>* __p, memory_order __mo)
|
|
{ return std::atomic_load_explicit<_Tp>(__p, __mo); }
|
|
|
|
template<typename _Tp>
|
|
void atomic_store(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r)
|
|
{ return std::atomic_store<_Tp>(__p, __r); }
|
|
|
|
template<typename _Tp>
|
|
shared_ptr<_Tp>
|
|
atomic_store_explicit(const shared_ptr<_Tp>* __p,
|
|
shared_ptr<_Tp> __r,
|
|
memory_order __mo)
|
|
{ return std::atomic_store_explicit<_Tp>(__p, __r, __mo); }
|
|
|
|
template<typename _Tp>
|
|
void atomic_exchange(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r)
|
|
{ return std::atomic_exchange<_Tp>(__p, __r); }
|
|
|
|
template<typename _Tp>
|
|
shared_ptr<_Tp>
|
|
atomic_exchange_explicit(const shared_ptr<_Tp>* __p,
|
|
shared_ptr<_Tp> __r,
|
|
memory_order __mo)
|
|
{ return std::atomic_exchange_explicit<_Tp>(__p, __r, __mo); }
|
|
|
|
template<typename _Tp>
|
|
bool atomic_compare_exchange_weak(shared_ptr<_Tp>* __p,
|
|
shared_ptr<_Tp>* __v,
|
|
shared_ptr<_Tp> __w)
|
|
{ return std::atomic_compare_exchange_weak<_Tp>(__p, __v, __w); }
|
|
|
|
template<typename _Tp>
|
|
bool atomic_compare_exchange_strong(shared_ptr<_Tp>* __p,
|
|
shared_ptr<_Tp>* __v,
|
|
shared_ptr<_Tp> __w)
|
|
{ return std::atomic_compare_exchange_strong<_Tp>(__p, __v, __w); }
|
|
|
|
template<typename _Tp>
|
|
bool atomic_compare_exchange_weak_explicit(shared_ptr<_Tp>* __p,
|
|
shared_ptr<_Tp>* __v,
|
|
shared_ptr<_Tp> __w,
|
|
memory_order __success,
|
|
memory_order __failure)
|
|
{ return std::atomic_compare_exchange_weak_explicit<_Tp>(__p, __v, __w,
|
|
__success,
|
|
__failure); }
|
|
|
|
template<typename _Tp>
|
|
bool atomic_compare_exchange_strong_explicit(shared_ptr<_Tp>* __p,
|
|
shared_ptr<_Tp>* __v,
|
|
shared_ptr<_Tp> __w,
|
|
memory_order __success,
|
|
memory_order __failure)
|
|
{ return std::atomic_compare_exchange_strong_explicit<_Tp>(__p, __v, __w,
|
|
__success,
|
|
__failure); }
|
|
|
|
//enable_shared_from_this
|
|
template<typename _Tp>
|
|
class enable_shared_from_this
|
|
{
|
|
protected:
|
|
constexpr enable_shared_from_this() noexcept { }
|
|
|
|
enable_shared_from_this(const enable_shared_from_this&) noexcept { }
|
|
|
|
enable_shared_from_this&
|
|
operator=(const enable_shared_from_this&) noexcept
|
|
{ return *this; }
|
|
|
|
~enable_shared_from_this() { }
|
|
|
|
public:
|
|
shared_ptr<_Tp>
|
|
shared_from_this()
|
|
{ return shared_ptr<_Tp>(this->_M_weak_this); }
|
|
|
|
shared_ptr<const _Tp>
|
|
shared_from_this() const
|
|
{ return shared_ptr<const _Tp>(this->_M_weak_this); }
|
|
|
|
private:
|
|
template<typename _Tp1>
|
|
void
|
|
_M_weak_assign(_Tp1* __p, const __shared_count<>& __n) const noexcept
|
|
{ _M_weak_this._M_assign(__p, __n); }
|
|
|
|
template<typename _Tp1>
|
|
friend void
|
|
__enable_shared_from_this_helper(const __shared_count<>& __pn,
|
|
const enable_shared_from_this* __pe,
|
|
const _Tp1* __px) noexcept
|
|
{
|
|
if(__pe != 0)
|
|
__pe->_M_weak_assign(const_cast<_Tp1*>(__px), __pn);
|
|
}
|
|
|
|
mutable weak_ptr<_Tp> _M_weak_this;
|
|
};
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace fundamentals_v2
|
|
} // namespace experimental
|
|
|
|
_GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|
|
|
/// std::hash specialization for shared_ptr.
|
|
template<typename _Tp>
|
|
struct hash<experimental::shared_ptr<_Tp>>
|
|
: public __hash_base<size_t, experimental::shared_ptr<_Tp>>
|
|
{
|
|
size_t
|
|
operator()(const experimental::shared_ptr<_Tp>& __s) const noexcept
|
|
{ return std::hash<_Tp*>()(__s.get()); }
|
|
};
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace std
|
|
|
|
#endif // __cplusplus <= 201103L
|
|
|
|
#endif // _GLIBCXX_EXPERIMENTAL_SHARED_PTR_H
|