1 // Safe sequence implementation -*- C++ -*-
3 // Copyright (C) 2010-2021 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
25 /** @file debug/safe_sequence.tcc
26 * This file is a GNU debug extension to the Standard C++ Library.
29 #ifndef _GLIBCXX_DEBUG_SAFE_SEQUENCE_TCC
30 #define _GLIBCXX_DEBUG_SAFE_SEQUENCE_TCC 1
34 template<typename _Sequence>
35 template<typename _Predicate>
37 _Safe_sequence<_Sequence>::
38 _M_invalidate_if(_Predicate __pred)
40 typedef typename _Sequence::iterator iterator;
41 typedef typename _Sequence::const_iterator const_iterator;
43 __gnu_cxx::__scoped_lock sentry(this->_M_get_mutex());
44 for (_Safe_iterator_base* __iter = _M_iterators; __iter;)
46 iterator* __victim = static_cast<iterator*>(__iter);
47 __iter = __iter->_M_next;
48 if (!__victim->_M_singular() && __pred(__victim->base()))
50 __victim->_M_invalidate();
54 for (_Safe_iterator_base* __iter2 = _M_const_iterators; __iter2;)
56 const_iterator* __victim = static_cast<const_iterator*>(__iter2);
57 __iter2 = __iter2->_M_next;
58 if (!__victim->_M_singular() && __pred(__victim->base()))
60 __victim->_M_invalidate();
65 template<typename _Sequence>
66 template<typename _Predicate>
68 _Safe_sequence<_Sequence>::
69 _M_transfer_from_if(_Safe_sequence& __from, _Predicate __pred)
71 if (this == std::__addressof(__from))
74 typedef typename _Sequence::iterator iterator;
75 typedef typename _Sequence::const_iterator const_iterator;
77 _Safe_iterator_base* __transfered_iterators = 0;
78 _Safe_iterator_base* __transfered_const_iterators = 0;
79 _Safe_iterator_base* __last_iterator = 0;
80 _Safe_iterator_base* __last_const_iterator = 0;
82 // We lock __from first and detach iterator(s) to transfer
83 __gnu_cxx::__scoped_lock sentry(__from._M_get_mutex());
85 for (_Safe_iterator_base* __iter = __from._M_iterators; __iter;)
87 _Safe_iterator_base* __victim_base = __iter;
88 iterator* __victim = static_cast<iterator*>(__victim_base);
89 __iter = __iter->_M_next;
90 if (!__victim->_M_singular() && __pred(__victim->base()))
92 __victim->_M_detach_single();
93 if (__transfered_iterators)
95 __victim_base->_M_next = __transfered_iterators;
96 __transfered_iterators->_M_prior = __victim_base;
99 __last_iterator = __victim_base;
100 __victim_base->_M_sequence = this;
101 __victim_base->_M_version = this->_M_version;
102 __transfered_iterators = __victim_base;
106 for (_Safe_iterator_base* __iter2 = __from._M_const_iterators;
109 _Safe_iterator_base* __victim_base = __iter2;
110 const_iterator* __victim =
111 static_cast<const_iterator*>(__victim_base);
112 __iter2 = __iter2->_M_next;
113 if (!__victim->_M_singular() && __pred(__victim->base()))
115 __victim->_M_detach_single();
116 if (__transfered_const_iterators)
118 __victim_base->_M_next = __transfered_const_iterators;
119 __transfered_const_iterators->_M_prior = __victim_base;
122 __last_const_iterator = __victim;
123 __victim_base->_M_sequence = this;
124 __victim_base->_M_version = this->_M_version;
125 __transfered_const_iterators = __victim_base;
130 // Now we can lock *this and add the transfered iterators if any
131 if (__last_iterator || __last_const_iterator)
133 __gnu_cxx::__scoped_lock sentry(this->_M_get_mutex());
136 if (this->_M_iterators)
138 this->_M_iterators->_M_prior = __last_iterator;
139 __last_iterator->_M_next = this->_M_iterators;
141 this->_M_iterators = __transfered_iterators;
143 if (__last_const_iterator)
145 if (this->_M_const_iterators)
147 this->_M_const_iterators->_M_prior = __last_const_iterator;
148 __last_const_iterator->_M_next = this->_M_const_iterators;
150 this->_M_const_iterators = __transfered_const_iterators;
154 } // namespace __gnu_debug