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// Safe sequence implementation -*- C++ -*- |
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|
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// Copyright (C) 2010-2021 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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|
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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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|
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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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|
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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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|
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/** @file debug/safe_sequence.tcc |
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* This file is a GNU debug extension to the Standard C++ Library. |
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*/ |
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|
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#ifndef _GLIBCXX_DEBUG_SAFE_SEQUENCE_TCC |
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#define _GLIBCXX_DEBUG_SAFE_SEQUENCE_TCC 1 |
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|
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namespace __gnu_debug |
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{ |
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template<typename _Sequence> |
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template<typename _Predicate> |
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void |
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_Safe_sequence<_Sequence>:: |
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_M_invalidate_if(_Predicate __pred) |
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{ |
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typedef typename _Sequence::iterator iterator; |
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typedef typename _Sequence::const_iterator const_iterator; |
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|
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__gnu_cxx::__scoped_lock sentry(this->_M_get_mutex()); |
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for (_Safe_iterator_base* __iter = _M_iterators; __iter;) |
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{ |
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iterator* __victim = static_cast<iterator*>(__iter); |
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__iter = __iter->_M_next; |
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if (!__victim->_M_singular() && __pred(__victim->base())) |
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{ |
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__victim->_M_invalidate(); |
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} |
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} |
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|
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for (_Safe_iterator_base* __iter2 = _M_const_iterators; __iter2;) |
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{ |
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const_iterator* __victim = static_cast<const_iterator*>(__iter2); |
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__iter2 = __iter2->_M_next; |
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if (!__victim->_M_singular() && __pred(__victim->base())) |
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{ |
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__victim->_M_invalidate(); |
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} |
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} |
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} |
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|
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template<typename _Sequence> |
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template<typename _Predicate> |
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void |
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_Safe_sequence<_Sequence>:: |
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_M_transfer_from_if(_Safe_sequence& __from, _Predicate __pred) |
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{ |
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if (this == std::__addressof(__from)) |
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return; |
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|
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typedef typename _Sequence::iterator iterator; |
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typedef typename _Sequence::const_iterator const_iterator; |
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|
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_Safe_iterator_base* __transfered_iterators = 0; |
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_Safe_iterator_base* __transfered_const_iterators = 0; |
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_Safe_iterator_base* __last_iterator = 0; |
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_Safe_iterator_base* __last_const_iterator = 0; |
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{ |
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// We lock __from first and detach iterator(s) to transfer |
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__gnu_cxx::__scoped_lock sentry(__from._M_get_mutex()); |
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|
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for (_Safe_iterator_base* __iter = __from._M_iterators; __iter;) |
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{ |
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_Safe_iterator_base* __victim_base = __iter; |
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iterator* __victim = static_cast<iterator*>(__victim_base); |
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__iter = __iter->_M_next; |
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if (!__victim->_M_singular() && __pred(__victim->base())) |
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{ |
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__victim->_M_detach_single(); |
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if (__transfered_iterators) |
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{ |
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__victim_base->_M_next = __transfered_iterators; |
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__transfered_iterators->_M_prior = __victim_base; |
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} |
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else |
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__last_iterator = __victim_base; |
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__victim_base->_M_sequence = this; |
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__victim_base->_M_version = this->_M_version; |
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__transfered_iterators = __victim_base; |
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} |
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} |
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|
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for (_Safe_iterator_base* __iter2 = __from._M_const_iterators; |
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__iter2;) |
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{ |
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_Safe_iterator_base* __victim_base = __iter2; |
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const_iterator* __victim = |
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static_cast<const_iterator*>(__victim_base); |
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__iter2 = __iter2->_M_next; |
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if (!__victim->_M_singular() && __pred(__victim->base())) |
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{ |
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__victim->_M_detach_single(); |
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if (__transfered_const_iterators) |
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{ |
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__victim_base->_M_next = __transfered_const_iterators; |
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__transfered_const_iterators->_M_prior = __victim_base; |
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} |
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else |
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__last_const_iterator = __victim; |
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__victim_base->_M_sequence = this; |
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__victim_base->_M_version = this->_M_version; |
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__transfered_const_iterators = __victim_base; |
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} |
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} |
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} |
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|
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// Now we can lock *this and add the transfered iterators if any |
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if (__last_iterator || __last_const_iterator) |
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{ |
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__gnu_cxx::__scoped_lock sentry(this->_M_get_mutex()); |
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if (__last_iterator) |
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{ |
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if (this->_M_iterators) |
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{ |
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this->_M_iterators->_M_prior = __last_iterator; |
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__last_iterator->_M_next = this->_M_iterators; |
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} |
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this->_M_iterators = __transfered_iterators; |
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} |
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if (__last_const_iterator) |
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{ |
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if (this->_M_const_iterators) |
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{ |
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this->_M_const_iterators->_M_prior = __last_const_iterator; |
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__last_const_iterator->_M_next = this->_M_const_iterators; |
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} |
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this->_M_const_iterators = __transfered_const_iterators; |
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} |
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} |
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} |
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} // namespace __gnu_debug |
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|
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#endif |
