1 // Debugging iterator implementation (out of line) -*- C++ -*-
3 // Copyright (C) 2003, 2004, 2005, 2006
4 // Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 2, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING. If not, write to the Free
19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22 // As a special exception, you may use this file as part of a free software
23 // library without restriction. Specifically, if other files instantiate
24 // templates or use macros or inline functions from this file, or you compile
25 // this file and link it with other files to produce an executable, this
26 // file does not by itself cause the resulting executable to be covered by
27 // the GNU General Public License. This exception does not however
28 // invalidate any other reasons why the executable file might be covered by
29 // the GNU General Public License.
31 /** @file safe_iterator.tcc
32 * This is an internal header file, included by other library headers.
33 * You should not attempt to use it directly.
36 #ifndef _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC
37 #define _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC 1
41 template<typename _Iterator, typename _Sequence>
43 _Safe_iterator<_Iterator, _Sequence>::
44 _M_can_advance(const difference_type& __n) const
46 typedef typename _Sequence::const_iterator const_iterator;
48 if (this->_M_singular())
54 const_iterator __begin =
55 static_cast<const _Sequence*>(_M_sequence)->begin();
56 std::pair<difference_type, _Distance_precision> __dist =
57 this->_M_get_distance(__begin, *this);
58 bool __ok = (__dist.second == __dp_exact && __dist.first >= -__n
59 || __dist.second != __dp_exact && __dist.first > 0);
64 const_iterator __end =
65 static_cast<const _Sequence*>(_M_sequence)->end();
66 std::pair<difference_type, _Distance_precision> __dist =
67 this->_M_get_distance(*this, __end);
68 bool __ok = (__dist.second == __dp_exact && __dist.first >= __n
69 || __dist.second != __dp_exact && __dist.first > 0);
74 template<typename _Iterator, typename _Sequence>
75 template<typename _Other>
77 _Safe_iterator<_Iterator, _Sequence>::
78 _M_valid_range(const _Safe_iterator<_Other, _Sequence>& __rhs) const
80 if (!_M_can_compare(__rhs))
83 /* Determine if we can order the iterators without the help of
85 std::pair<difference_type, _Distance_precision> __dist =
86 this->_M_get_distance(*this, __rhs);
87 switch (__dist.second) {
89 if (__dist.first == 0)
95 return __dist.first >= 0;
98 /* We can only test for equality, but check if one of the
99 iterators is at an extreme. */
100 if (_M_is_begin() || __rhs._M_is_end())
102 else if (_M_is_end() || __rhs._M_is_begin())
105 // Assume that this is a valid range; we can't check anything else
109 template<typename _Iterator, typename _Sequence>
111 _Safe_iterator<_Iterator, _Sequence>::
114 __gnu_cxx::__scoped_lock sentry(this->_M_get_mutex());
115 _M_invalidate_single();
118 template<typename _Iterator, typename _Sequence>
120 _Safe_iterator<_Iterator, _Sequence>::
121 _M_invalidate_single()
123 typedef typename _Sequence::iterator iterator;
124 typedef typename _Sequence::const_iterator const_iterator;
126 if (!this->_M_singular())
128 for (_Safe_iterator_base* __iter = _M_sequence->_M_iterators;
129 __iter; __iter = __iter->_M_next)
131 iterator* __victim = static_cast<iterator*>(__iter);
132 if (this->base() == __victim->base())
133 __victim->_M_version = 0;
136 for (_Safe_iterator_base* __iter2 = _M_sequence->_M_const_iterators;
137 __iter2; __iter2 = __iter2->_M_next)
139 const_iterator* __victim = static_cast<const_iterator*>(__iter2);
140 if (__victim->base() == this->base())
141 __victim->_M_version = 0;
146 } // namespace __gnu_debug