// Debugging iterator implementation (out of line) -*- C++ -*-
-// Copyright (C) 2003, 2004, 2005, 2006
-// Free Software Foundation, Inc.
+// Copyright (C) 2003-2014 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)
+// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// 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.
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
-// 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.
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
-/** @file safe_iterator.tcc
- * This is an internal header file, included by other library headers.
- * You should not attempt to use it directly.
+/** @file debug/safe_iterator.tcc
+ * This file is a GNU debug extension to the Standard C++ Library.
*/
#ifndef _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC
_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);
+ __get_distance(_M_get_sequence()->_M_base().begin(), base());
+ 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);
+ __get_distance(base(), _M_get_sequence()->_M_base().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;
- }
+ bool
+ _Safe_iterator<_Iterator, _Sequence>::
+ _M_valid_range(const _Safe_iterator& __rhs) const
+ {
+ if (!_M_can_compare(__rhs))
+ return false;
- /* 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())
+ /* Determine if we can order the iterators without the help of
+ the container */
+ std::pair<difference_type, _Distance_precision> __dist =
+ __get_distance(base(), __rhs.base());
+ switch (__dist.second) {
+ case __dp_equality:
+ if (__dist.first == 0)
return true;
- else if (_M_is_end() || __rhs._M_is_begin())
- return false;
+ break;
- // Assume that this is a valid range; we can't check anything else
- return true;
+ case __dp_sign:
+ case __dp_exact:
+ return __dist.first >= 0;
}
- 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;
- }
+ /* We can only test for equality, but check if one of the
+ iterators is at an extreme. */
+ /* Optim for classic [begin, it) or [it, end) ranges, limit checks
+ * when code is valid. Note, for the special case of forward_list,
+ * before_begin replaces the role of begin. */
+ if (_M_is_beginnest() || __rhs._M_is_end())
+ return true;
+ if (_M_is_end() || __rhs._M_is_beginnest())
+ return false;
- 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;
- }
+ // Assume that this is a valid range; we can't check anything else
+ return true;
}
} // namespace __gnu_debug
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