123 lines
3.3 KiB
C++
123 lines
3.3 KiB
C++
// Safe container implementation -*- C++ -*-
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// Copyright (C) 2014-2017 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 debug/safe_container.h
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* This file is a GNU debug extension to the Standard C++ Library.
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*/
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#ifndef _GLIBCXX_DEBUG_SAFE_CONTAINER_H
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#define _GLIBCXX_DEBUG_SAFE_CONTAINER_H 1
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#include <ext/alloc_traits.h>
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namespace __gnu_debug
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{
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/// Safe class dealing with some allocator dependent operations.
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template<typename _SafeContainer,
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typename _Alloc,
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template<typename> class _SafeBase,
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bool _IsCxx11AllocatorAware = true>
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class _Safe_container
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: public _SafeBase<_SafeContainer>
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{
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typedef _SafeBase<_SafeContainer> _Base;
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_SafeContainer&
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_M_cont() _GLIBCXX_NOEXCEPT
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{ return *static_cast<_SafeContainer*>(this); }
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protected:
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_Safe_container&
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_M_safe() _GLIBCXX_NOEXCEPT
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{ return *this; }
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#if __cplusplus >= 201103L
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_Safe_container() = default;
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_Safe_container(const _Safe_container&) = default;
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_Safe_container(_Safe_container&&) = default;
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_Safe_container(_Safe_container&& __x, const _Alloc& __a)
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: _Safe_container()
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{
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if (__x._M_cont().get_allocator() == __a)
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_Base::_M_swap(__x);
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else
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__x._M_invalidate_all();
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}
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#endif
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public:
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// Copy assignment invalidate all iterators.
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_Safe_container&
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operator=(const _Safe_container&) _GLIBCXX_NOEXCEPT
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{
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this->_M_invalidate_all();
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return *this;
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}
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#if __cplusplus >= 201103L
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_Safe_container&
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operator=(_Safe_container&& __x) noexcept
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{
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__glibcxx_check_self_move_assign(__x);
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if (_IsCxx11AllocatorAware)
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{
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typedef __gnu_cxx::__alloc_traits<_Alloc> _Alloc_traits;
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bool __xfer_memory = _Alloc_traits::_S_propagate_on_move_assign()
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|| _M_cont().get_allocator() == __x._M_cont().get_allocator();
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if (__xfer_memory)
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_Base::_M_swap(__x);
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else
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this->_M_invalidate_all();
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}
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else
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_Base::_M_swap(__x);
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__x._M_invalidate_all();
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return *this;
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}
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void
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_M_swap(_Safe_container& __x) noexcept
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{
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if (_IsCxx11AllocatorAware)
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{
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typedef __gnu_cxx::__alloc_traits<_Alloc> _Alloc_traits;
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if (!_Alloc_traits::_S_propagate_on_swap())
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__glibcxx_check_equal_allocs(this->_M_cont()._M_base(),
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__x._M_cont()._M_base());
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}
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_Base::_M_swap(__x);
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}
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#endif
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};
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} // namespace __gnu_debug
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#endif
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