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Diffstat (limited to 'libstdc++/include/debug/safe_iterator.tcc')
| -rw-r--r-- | libstdc++/include/debug/safe_iterator.tcc | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/libstdc++/include/debug/safe_iterator.tcc b/libstdc++/include/debug/safe_iterator.tcc new file mode 100644 index 0000000..d23e90f --- /dev/null +++ b/libstdc++/include/debug/safe_iterator.tcc @@ -0,0 +1,148 @@ +// Debugging iterator implementation (out of line) -*- C++ -*- + +// Copyright (C) 2003, 2004, 2005, 2006 +// Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING. If not, write to the Free +// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, +// USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. + +/** @file debug/safe_iterator.tcc + * This file is a GNU debug extension to the Standard C++ Library. + */ + +#ifndef _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC +#define _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC 1 + +namespace __gnu_debug +{ + template<typename _Iterator, typename _Sequence> + bool + _Safe_iterator<_Iterator, _Sequence>:: + _M_can_advance(const difference_type& __n) const + { + typedef typename _Sequence::const_iterator const_iterator; + + if (this->_M_singular()) + return false; + if (__n == 0) + return true; + if (__n < 0) + { + const_iterator __begin = + static_cast<const _Sequence*>(_M_sequence)->begin(); + std::pair<difference_type, _Distance_precision> __dist = + this->_M_get_distance(__begin, *this); + bool __ok = (__dist.second == __dp_exact && __dist.first >= -__n + || __dist.second != __dp_exact && __dist.first > 0); + return __ok; + } + else + { + const_iterator __end = + static_cast<const _Sequence*>(_M_sequence)->end(); + std::pair<difference_type, _Distance_precision> __dist = + this->_M_get_distance(*this, __end); + bool __ok = (__dist.second == __dp_exact && __dist.first >= __n + || __dist.second != __dp_exact && __dist.first > 0); + return __ok; + } + } + + template<typename _Iterator, typename _Sequence> + template<typename _Other> + bool + _Safe_iterator<_Iterator, _Sequence>:: + _M_valid_range(const _Safe_iterator<_Other, _Sequence>& __rhs) const + { + if (!_M_can_compare(__rhs)) + return false; + + /* Determine if we can order the iterators without the help of + the container */ + std::pair<difference_type, _Distance_precision> __dist = + this->_M_get_distance(*this, __rhs); + switch (__dist.second) { + case __dp_equality: + if (__dist.first == 0) + return true; + break; + + case __dp_sign: + case __dp_exact: + return __dist.first >= 0; + } + + /* We can only test for equality, but check if one of the + iterators is at an extreme. */ + if (_M_is_begin() || __rhs._M_is_end()) + return true; + else if (_M_is_end() || __rhs._M_is_begin()) + return false; + + // Assume that this is a valid range; we can't check anything else + return true; + } + + template<typename _Iterator, typename _Sequence> + void + _Safe_iterator<_Iterator, _Sequence>:: + _M_invalidate() + { + __gnu_cxx::__scoped_lock sentry(this->_M_get_mutex()); + _M_invalidate_single(); + } + + template<typename _Iterator, typename _Sequence> + void + _Safe_iterator<_Iterator, _Sequence>:: + _M_invalidate_single() + { + typedef typename _Sequence::iterator iterator; + typedef typename _Sequence::const_iterator const_iterator; + + if (!this->_M_singular()) + { + for (_Safe_iterator_base* __iter = _M_sequence->_M_iterators; + __iter; __iter = __iter->_M_next) + { + iterator* __victim = static_cast<iterator*>(__iter); + if (this->base() == __victim->base()) + __victim->_M_version = 0; + } + + for (_Safe_iterator_base* __iter2 = _M_sequence->_M_const_iterators; + __iter2; __iter2 = __iter2->_M_next) + { + const_iterator* __victim = static_cast<const_iterator*>(__iter2); + if (__victim->base() == this->base()) + __victim->_M_version = 0; + } + _M_version = 0; + } + } +} // namespace __gnu_debug + +#endif + |
