mirror of
https://github.com/autc04/Retro68.git
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157 lines
4.9 KiB
C++
157 lines
4.9 KiB
C++
// Safe sequence implementation -*- C++ -*-
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// Copyright (C) 2010-2019 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_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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#ifndef _GLIBCXX_DEBUG_SAFE_SEQUENCE_TCC
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#define _GLIBCXX_DEBUG_SAFE_SEQUENCE_TCC 1
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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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__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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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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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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typedef typename _Sequence::iterator iterator;
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typedef typename _Sequence::const_iterator const_iterator;
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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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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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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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// 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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#endif
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