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 debug/safe_iterator.tcc
32 * This file is a GNU debug extension to the Standard C++ Library.
35 #ifndef _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC
36 #define _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC 1
40 template<typename _Iterator, typename _Sequence>
42 _Safe_iterator<_Iterator, _Sequence>::
43 _M_can_advance(const difference_type& __n) const
45 typedef typename _Sequence::const_iterator const_iterator;
47 if (this->_M_singular())
53 const_iterator __begin =
54 static_cast<const _Sequence*>(_M_sequence)->begin();
55 std::pair<difference_type, _Distance_precision> __dist =
56 this->_M_get_distance(__begin, *this);
57 bool __ok = ((__dist.second == __dp_exact && __dist.first >= -__n)
58 || (__dist.second != __dp_exact && __dist.first > 0));
63 const_iterator __end =
64 static_cast<const _Sequence*>(_M_sequence)->end();
65 std::pair<difference_type, _Distance_precision> __dist =
66 this->_M_get_distance(*this, __end);
67 bool __ok = ((__dist.second == __dp_exact && __dist.first >= __n)
68 || (__dist.second != __dp_exact && __dist.first > 0));
73 template<typename _Iterator, typename _Sequence>
74 template<typename _Other>
76 _Safe_iterator<_Iterator, _Sequence>::
77 _M_valid_range(const _Safe_iterator<_Other, _Sequence>& __rhs) const
79 if (!_M_can_compare(__rhs))
82 /* Determine if we can order the iterators without the help of
84 std::pair<difference_type, _Distance_precision> __dist =
85 this->_M_get_distance(*this, __rhs);
86 switch (__dist.second) {
88 if (__dist.first == 0)
94 return __dist.first >= 0;
97 /* We can only test for equality, but check if one of the
98 iterators is at an extreme. */
99 if (_M_is_begin() || __rhs._M_is_end())
101 else if (_M_is_end() || __rhs._M_is_begin())
104 // Assume that this is a valid range; we can't check anything else
108 template<typename _Iterator, typename _Sequence>
110 _Safe_iterator<_Iterator, _Sequence>::
113 __gnu_cxx::__scoped_lock sentry(this->_M_get_mutex());
114 _M_invalidate_single();
117 template<typename _Iterator, typename _Sequence>
119 _Safe_iterator<_Iterator, _Sequence>::
120 _M_invalidate_single()
122 typedef typename _Sequence::iterator iterator;
123 typedef typename _Sequence::const_iterator const_iterator;
125 if (!this->_M_singular())
127 for (_Safe_iterator_base* __iter = _M_sequence->_M_iterators;
128 __iter; __iter = __iter->_M_next)
130 iterator* __victim = static_cast<iterator*>(__iter);
131 if (this->base() == __victim->base())
132 __victim->_M_version = 0;
135 for (_Safe_iterator_base* __iter2 = _M_sequence->_M_const_iterators;
136 __iter2; __iter2 = __iter2->_M_next)
138 const_iterator* __victim = static_cast<const_iterator*>(__iter2);
139 if (__victim->base() == this->base())
140 __victim->_M_version = 0;
145 } // namespace __gnu_debug