123 lines
3.3 KiB
C++
123 lines
3.3 KiB
C++
// Safe container implementation -*- C++ -*-
|
|
|
|
// Copyright (C) 2014-2020 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 debug/safe_container.h
|
|
* This file is a GNU debug extension to the Standard C++ Library.
|
|
*/
|
|
|
|
#ifndef _GLIBCXX_DEBUG_SAFE_CONTAINER_H
|
|
#define _GLIBCXX_DEBUG_SAFE_CONTAINER_H 1
|
|
|
|
#include <ext/alloc_traits.h>
|
|
|
|
namespace __gnu_debug
|
|
{
|
|
/// Safe class dealing with some allocator dependent operations.
|
|
template<typename _SafeContainer,
|
|
typename _Alloc,
|
|
template<typename> class _SafeBase,
|
|
bool _IsCxx11AllocatorAware = true>
|
|
class _Safe_container
|
|
: public _SafeBase<_SafeContainer>
|
|
{
|
|
typedef _SafeBase<_SafeContainer> _Base;
|
|
|
|
_SafeContainer&
|
|
_M_cont() _GLIBCXX_NOEXCEPT
|
|
{ return *static_cast<_SafeContainer*>(this); }
|
|
|
|
protected:
|
|
_Safe_container&
|
|
_M_safe() _GLIBCXX_NOEXCEPT
|
|
{ return *this; }
|
|
|
|
#if __cplusplus >= 201103L
|
|
_Safe_container() = default;
|
|
_Safe_container(const _Safe_container&) = default;
|
|
_Safe_container(_Safe_container&&) = default;
|
|
|
|
_Safe_container(_Safe_container&& __x, const _Alloc& __a)
|
|
: _Safe_container()
|
|
{
|
|
if (__x._M_cont().get_allocator() == __a)
|
|
_Base::_M_swap(__x);
|
|
else
|
|
__x._M_invalidate_all();
|
|
}
|
|
#endif
|
|
|
|
public:
|
|
// Copy assignment invalidate all iterators.
|
|
_Safe_container&
|
|
operator=(const _Safe_container&) _GLIBCXX_NOEXCEPT
|
|
{
|
|
this->_M_invalidate_all();
|
|
return *this;
|
|
}
|
|
|
|
#if __cplusplus >= 201103L
|
|
_Safe_container&
|
|
operator=(_Safe_container&& __x) noexcept
|
|
{
|
|
__glibcxx_check_self_move_assign(__x);
|
|
|
|
if (_IsCxx11AllocatorAware)
|
|
{
|
|
typedef __gnu_cxx::__alloc_traits<_Alloc> _Alloc_traits;
|
|
|
|
bool __xfer_memory = _Alloc_traits::_S_propagate_on_move_assign()
|
|
|| _M_cont().get_allocator() == __x._M_cont().get_allocator();
|
|
if (__xfer_memory)
|
|
_Base::_M_swap(__x);
|
|
else
|
|
this->_M_invalidate_all();
|
|
}
|
|
else
|
|
_Base::_M_swap(__x);
|
|
|
|
__x._M_invalidate_all();
|
|
return *this;
|
|
}
|
|
|
|
void
|
|
_M_swap(_Safe_container& __x) noexcept
|
|
{
|
|
if (_IsCxx11AllocatorAware)
|
|
{
|
|
typedef __gnu_cxx::__alloc_traits<_Alloc> _Alloc_traits;
|
|
|
|
if (!_Alloc_traits::_S_propagate_on_swap())
|
|
__glibcxx_check_equal_allocs(this->_M_cont()._M_base(),
|
|
__x._M_cont()._M_base());
|
|
}
|
|
|
|
_Base::_M_swap(__x);
|
|
}
|
|
#endif
|
|
};
|
|
|
|
} // namespace __gnu_debug
|
|
|
|
#endif
|