| // Experimental shared_ptr with array support -*- C++ -*- |
| |
| // Copyright (C) 2015-2016 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // Under Section 7 of GPL version 3, you are granted additional |
| // permissions described in the GCC Runtime Library Exception, version |
| // 3.1, as published by the Free Software Foundation. |
| |
| // You should have received a copy of the GNU General Public License and |
| // a copy of the GCC Runtime Library Exception along with this program; |
| // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| // <http://www.gnu.org/licenses/>. |
| |
| /** @file experimental/bits/shared_ptr.h |
| * This is an internal header file, included by other library headers. |
| * Do not attempt to use it directly. @headername{experimental/memory} |
| */ |
| |
| #ifndef _GLIBCXX_EXPERIMENTAL_SHARED_PTR_H |
| #define _GLIBCXX_EXPERIMENTAL_SHARED_PTR_H 1 |
| |
| #pragma GCC system_header |
| |
| #if __cplusplus <= 201103L |
| # include <bits/c++14_warning.h> |
| #else |
| |
| #include <memory> |
| #include <experimental/type_traits> |
| |
| namespace std _GLIBCXX_VISIBILITY(default) |
| { |
| namespace experimental |
| { |
| inline namespace fundamentals_v2 |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| template<typename _Tp> class enable_shared_from_this; |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } // namespace fundamentals_v2 |
| } // namespace experimental |
| |
| #define __cpp_lib_experimental_shared_ptr_arrays 201406 |
| |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| /* |
| * The specification of std::experimental::shared_ptr is slightly different |
| * to std::shared_ptr (specifically in terms of "compatible" pointers) so |
| * to implement std::experimental::shared_ptr without too much duplication |
| * we make it derive from a partial specialization of std::__shared_ptr |
| * using a special tag type, __libfund_v1. |
| * |
| * There are two partial specializations for the tag type, supporting the |
| * different interfaces of the array and non-array forms. |
| */ |
| |
| template <typename _Tp, bool = is_array<_Tp>::value> |
| struct __libfund_v1 { using type = _Tp; }; |
| |
| // helper for _Compatible |
| template<typename _From_type, typename _To_type> |
| struct __sp_compatible |
| : is_convertible<_From_type*, _To_type*>::type |
| { }; |
| |
| template<size_t _Nm, typename _Tp> |
| struct __sp_compatible<_Tp[_Nm], _Tp[]> |
| : true_type |
| { }; |
| |
| template<size_t _Nm, typename _Tp> |
| struct __sp_compatible<_Tp[_Nm], const _Tp[]> |
| : true_type |
| { }; |
| |
| // Partial specialization for base class of experimental::shared_ptr<T> |
| // (i.e. the non-array form of experimental::shared_ptr) |
| template<typename _Tp, _Lock_policy _Lp> |
| class __shared_ptr<__libfund_v1<_Tp, false>, _Lp> |
| : private __shared_ptr<_Tp, _Lp> |
| { |
| template<typename _Tp1, typename _Res = void> |
| using _Compatible |
| = enable_if_t<__sp_compatible<_Tp1, _Tp>::value, _Res>; |
| |
| using _Base_type = __shared_ptr<_Tp>; |
| |
| _Base_type& _M_get_base() { return *this;} |
| const _Base_type& _M_get_base() const { return *this;} |
| |
| public: |
| using element_type = _Tp; |
| |
| 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<__libfund_v1<_Tp1>, _Lp>& __r, |
| element_type* __p) noexcept |
| : _Base_type(__r._M_get_base(), __p) |
| { } |
| |
| __shared_ptr(const __shared_ptr&) noexcept = default; |
| __shared_ptr(__shared_ptr&&) noexcept = default; |
| __shared_ptr& operator=(const __shared_ptr&) noexcept = default; |
| __shared_ptr& operator=(__shared_ptr&&) noexcept = default; |
| ~__shared_ptr() = default; |
| |
| template<typename _Tp1, typename = _Compatible<_Tp1>> |
| __shared_ptr(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept |
| : _Base_type(__r._M_get_base()) |
| { } |
| |
| template<typename _Tp1, typename = _Compatible<_Tp1>> |
| __shared_ptr(__shared_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept |
| : _Base_type(std::move((__r._M_get_base()))) |
| { } |
| |
| template<typename _Tp1> |
| explicit __shared_ptr(const __weak_ptr<__libfund_v1<_Tp1>, _Lp>& __r) |
| : _Base_type(__r._M_get_base()) |
| { } |
| |
| 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)) |
| { } |
| |
| #if _GLIBCXX_USE_DEPRECATED |
| // Postcondition: use_count() == 1 and __r.get() == 0 |
| template<typename _Tp1> |
| __shared_ptr(std::auto_ptr<_Tp1>&& __r) |
| : _Base_type(std::move(__r)) |
| { } |
| #endif |
| |
| constexpr __shared_ptr(nullptr_t) noexcept : __shared_ptr() { } |
| |
| // reset |
| void |
| reset() noexcept |
| { __shared_ptr(nullptr).swap(*this); } |
| |
| template<typename _Tp1> |
| void |
| reset(_Tp1* __p) |
| { |
| _GLIBCXX_DEBUG_ASSERT(__p == 0 || __p != get()); |
| __shared_ptr(__p).swap(*this); |
| } |
| |
| template<typename _Tp1, typename _Deleter> |
| void |
| reset(_Tp1* __p, _Deleter __d) |
| { __shared_ptr(__p, __d).swap(*this); } |
| |
| template<typename _Tp1, typename _Deleter, typename _Alloc> |
| void |
| reset(_Tp1* __p, _Deleter __d, _Alloc __a) |
| { __shared_ptr(__p, __d, std::move(__a)).swap(*this); } |
| |
| using _Base_type::operator*; |
| using _Base_type::operator->; |
| |
| template<typename _Tp1> |
| _Compatible<_Tp1, __shared_ptr&> |
| operator=(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept |
| { |
| _Base_type::operator=(__r._M_get_base()); |
| return *this; |
| } |
| |
| template<class _Tp1> |
| _Compatible<_Tp1, __shared_ptr&> |
| operator=(__shared_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept |
| { |
| _Base_type::operator=(std::move(__r._M_get_base())); |
| return *this; |
| } |
| |
| template<typename _Tp1> |
| _Compatible<_Tp1, __shared_ptr&> |
| operator=(std::unique_ptr<_Tp1>&& __r) |
| { |
| _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) |
| { |
| _Base_type::operator=(std::move(__r)); |
| return *this; |
| } |
| #endif |
| |
| void |
| swap(__shared_ptr& __other) noexcept |
| { _Base_type::swap(__other); } |
| |
| template<typename _Tp1> |
| bool |
| owner_before(__shared_ptr<__libfund_v1<_Tp1>, _Lp> const& __rhs) const |
| { return _Base_type::owner_before(__rhs._M_get_base()); } |
| |
| template<typename _Tp1> |
| bool |
| owner_before(__weak_ptr<__libfund_v1<_Tp1>, _Lp> const& __rhs) const |
| { return _Base_type::owner_before(__rhs._M_get_base()); } |
| |
| using _Base_type::operator bool; |
| using _Base_type::get; |
| using _Base_type::unique; |
| using _Base_type::use_count; |
| |
| protected: |
| |
| // make_shared not yet support for shared_ptr_arrays |
| //template<typename _Alloc, typename... _Args> |
| // __shared_ptr(_Sp_make_shared_tag __tag, const _Alloc& __a, |
| // _Args&&... __args) |
| // : _M_ptr(), _M_refcount(__tag, (_Tp*)0, __a, |
| // std::forward<_Args>(__args)...) |
| // { |
| // void* __p = _M_refcount._M_get_deleter(typeid(__tag)); |
| // _M_ptr = static_cast<_Tp*>(__p); |
| // __enable_shared_from_this_helper(_M_refcount, _M_ptr, _M_ptr); |
| // } |
| |
| // __weak_ptr::lock() |
| __shared_ptr(const __weak_ptr<__libfund_v1<_Tp>, _Lp>& __r, |
| std::nothrow_t) |
| : _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; |
| }; |
| |
| // Partial specialization for base class of experimental::shared_ptr<T[N]> |
| // and experimental::shared_ptr<T[]> (i.e. the array forms). |
| template<typename _Tp, _Lock_policy _Lp> |
| class __shared_ptr<__libfund_v1<_Tp, true>, _Lp> |
| : private __shared_ptr<remove_extent_t<_Tp>, _Lp> |
| { |
| public: |
| using element_type = remove_extent_t<_Tp>; |
| |
| private: |
| struct _Array_deleter |
| { |
| void |
| operator()(element_type const *__p) const |
| { delete [] __p; } |
| }; |
| |
| template<typename _Tp1, typename _Res = void> |
| using _Compatible |
| = enable_if_t<__sp_compatible<_Tp1, _Tp>::value, _Res>; |
| |
| using _Base_type = __shared_ptr<element_type>; |
| |
| _Base_type& _M_get_base() { return *this;} |
| const _Base_type& _M_get_base() const { return *this;} |
| |
| public: |
| constexpr __shared_ptr() noexcept |
| : _Base_type() |
| { } |
| |
| template<typename _Tp1> |
| explicit __shared_ptr(_Tp1* __p) |
| : _Base_type(__p, _Array_deleter()) |
| { } |
| |
| 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<__libfund_v1<_Tp1>, _Lp>& __r, |
| element_type* __p) noexcept |
| : _Base_type(__r._M_get_base(), __p) |
| { } |
| |
| __shared_ptr(const __shared_ptr&) noexcept = default; |
| __shared_ptr(__shared_ptr&&) noexcept = default; |
| __shared_ptr& operator=(const __shared_ptr&) noexcept = default; |
| __shared_ptr& operator=(__shared_ptr&&) noexcept = default; |
| ~__shared_ptr() = default; |
| |
| template<typename _Tp1, typename = _Compatible<_Tp1>> |
| __shared_ptr(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept |
| : _Base_type(__r._M_get_base()) |
| { } |
| |
| template<typename _Tp1, typename = _Compatible<_Tp1>> |
| __shared_ptr(__shared_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept |
| : _Base_type(std::move((__r._M_get_base()))) |
| { } |
| |
| template<typename _Tp1> |
| explicit __shared_ptr(const __weak_ptr<__libfund_v1<_Tp1>, _Lp>& __r) |
| : _Base_type(__r._M_get_base()) |
| { } |
| |
| 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)) |
| { } |
| |
| #if _GLIBCXX_USE_DEPRECATED |
| // Postcondition: use_count() == 1 and __r.get() == 0 |
| template<typename _Tp1> |
| __shared_ptr(std::auto_ptr<_Tp1>&& __r) |
| : _Base_type(std::move(__r)) |
| { } |
| #endif |
| |
| constexpr __shared_ptr(nullptr_t) noexcept : __shared_ptr() { } |
| |
| // reset |
| void |
| reset() noexcept |
| { __shared_ptr(nullptr).swap(*this); } |
| |
| template<typename _Tp1> |
| void |
| reset(_Tp1* __p) |
| { |
| _GLIBCXX_DEBUG_ASSERT(__p == 0 || __p != get()); |
| __shared_ptr(__p, _Array_deleter()).swap(*this); |
| } |
| |
| template<typename _Tp1, typename _Deleter> |
| void |
| reset(_Tp1* __p, _Deleter __d) |
| { __shared_ptr(__p, __d).swap(*this); } |
| |
| template<typename _Tp1, typename _Deleter, typename _Alloc> |
| void |
| reset(_Tp1* __p, _Deleter __d, _Alloc __a) |
| { __shared_ptr(__p, __d, std::move(__a)).swap(*this); } |
| |
| element_type& |
| operator[](ptrdiff_t i) const noexcept |
| { |
| _GLIBCXX_DEBUG_ASSERT(get() != 0 && i >= 0); |
| return get()[i]; |
| } |
| |
| template<typename _Tp1> |
| _Compatible<_Tp1, __shared_ptr&> |
| operator=(const __shared_ptr<__libfund_v1<_Tp1>, _Lp>& __r) noexcept |
| { |
| _Base_type::operator=(__r._M_get_base()); |
| return *this; |
| } |
| |
| template<class _Tp1> |
| _Compatible<_Tp1, __shared_ptr&> |
| operator=(__shared_ptr<__libfund_v1<_Tp1>, _Lp>&& __r) noexcept |
| { |
| _Base_type::operator=(std::move(__r._M_get_base())); |
| return *this; |
| } |
| |
| template<typename _Tp1> |
| _Compatible<_Tp1, __shared_ptr&> |
| operator=(std::unique_ptr<_Tp1>&& __r) |
| { |
| _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) |
| { |
| _Base_type::operator=(std::move(__r)); |
| return *this; |
| } |
| #endif |
| |
| void |
| swap(__shared_ptr& __other) noexcept |
| { _Base_type::swap(__other); } |
| |
| template<typename _Tp1> |
| bool |
| owner_before(__shared_ptr<__libfund_v1<_Tp1>, _Lp> const& __rhs) const |
| { return _Base_type::owner_before(__rhs._M_get_base()); } |
| |
| template<typename _Tp1> |
| bool |
| owner_before(__weak_ptr<__libfund_v1<_Tp1>, _Lp> const& __rhs) const |
| { return _Base_type::owner_before(__rhs._M_get_base()); } |
| |
| using _Base_type::operator bool; |
| using _Base_type::get; |
| using _Base_type::unique; |
| using _Base_type::use_count; |
| |
| protected: |
| |
| // make_shared not yet support for shared_ptr_arrays |
| //template<typename _Alloc, typename... _Args> |
| // __shared_ptr(_Sp_make_shared_tag __tag, const _Alloc& __a, |
| // _Args&&... __args) |
| // : _M_ptr(), _M_refcount(__tag, (_Tp*)0, __a, |
| // std::forward<_Args>(__args)...) |
| // { |
| // void* __p = _M_refcount._M_get_deleter(typeid(__tag)); |
| // _M_ptr = static_cast<_Tp*>(__p); |
| // __enable_shared_from_this_helper(_M_refcount, _M_ptr, _M_ptr); |
| // } |
| |
| // __weak_ptr::lock() |
| __shared_ptr(const __weak_ptr<__libfund_v1<_Tp>, _Lp>& __r, |
| std::nothrow_t) |
| : _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 ยง20.8.2.2 |
| ~shared_ptr() = default; |
| |
| // C++14 ยง20.8.2.3 |
| 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 ยง20.8.2.2.4 |
| // 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 ยง20.8.2.2.7 //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 ยง20.8.2.2.8 |
| 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 ยง20.8.2.3 |
| 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 ยง20.8.2.3.6 |
| template<typename _Tp> |
| inline void |
| swap(weak_ptr<_Tp>& __a, weak_ptr<_Tp>& __b) noexcept |
| { __a.swap(__b); } |
| |
| /// C++14 ยง20.8.2.2.10 |
| 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 ยง20.8.2.2.11 |
| 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 ยง20.8.2.4 |
| 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 ยง20.8.2.6 |
| 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 |
