// Safe sequence implementation -*- C++ -*-
-// Copyright (C) 2003, 2004, 2005
-// Free Software Foundation, Inc.
+// Copyright (C) 2003-2020 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-// 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 debug/safe_sequence.h
+ * This file is a GNU debug extension to the Standard C++ Library.
+ */
#ifndef _GLIBCXX_DEBUG_SAFE_SEQUENCE_H
#define _GLIBCXX_DEBUG_SAFE_SEQUENCE_H 1
-#include <debug/debug.h>
+#include <debug/assertions.h>
#include <debug/macros.h>
#include <debug/functions.h>
#include <debug/safe_base.h>
namespace __gnu_debug
{
- template<typename _Iterator, typename _Sequence>
- class _Safe_iterator;
-
/** A simple function object that returns true if the passed-in
* value is not equal to the stored value. It saves typing over
* using both bind1st and not_equal.
{ return __value != __x; }
};
+ /** A simple function object that returns true if the passed-in
+ * value is equal to the stored value. */
+ template <typename _Type>
+ class _Equal_to
+ {
+ _Type __value;
+
+ public:
+ explicit _Equal_to(const _Type& __v) : __value(__v) { }
+
+ bool
+ operator()(const _Type& __x) const
+ { return __value == __x; }
+ };
+
/** A function object that returns true when the given random access
iterator is at least @c n steps away from the given iterator. */
template<typename _Iterator>
};
/**
- * @brief Base class for constructing a "safe" sequence type that
+ * @brief Base class for constructing a @a safe sequence type that
* tracks iterators that reference it.
*
* The class template %_Safe_sequence simplifies the construction of
- * "safe" sequences that track the iterators that reference the
+ * @a safe sequences that track the iterators that reference the
* sequence, so that the iterators are notified of changes in the
* sequence that may affect their operation, e.g., if the container
* invalidates its iterators or is destructed. This class template
* may only be used by deriving from it and passing the name of the
* derived class as its template parameter via the curiously
* recurring template pattern. The derived class must have @c
- * iterator and @const_iterator types that are instantiations of
+ * iterator and @c const_iterator types that are instantiations of
* class template _Safe_iterator for this sequence. Iterators will
* then be tracked automatically.
*/
{
public:
/** Invalidates all iterators @c x that reference this sequence,
- are not singular, and for which @c pred(x) returns @c
- true. The user of this routine should be careful not to make
- copies of the iterators passed to @p pred, as the copies may
- interfere with the invalidation. */
+ are not singular, and for which @c __pred(x) returns @c
+ true. @c __pred will be invoked with the normal iterators nested
+ in the safe ones. */
+ template<typename _Predicate>
+ void
+ _M_invalidate_if(_Predicate __pred);
+
+ /** Transfers all iterators @c x that reference @c from sequence,
+ are not singular, and for which @c __pred(x) returns @c
+ true. @c __pred will be invoked with the normal iterators nested
+ in the safe ones. */
template<typename _Predicate>
- void
- _M_invalidate_if(_Predicate __pred);
-
- /** Transfers all iterators that reference this memory location
- to this sequence from whatever sequence they are attached
- to. */
- template<typename _Iterator>
- void
- _M_transfer_iter(const _Safe_iterator<_Iterator, _Sequence>& __x);
+ void
+ _M_transfer_from_if(_Safe_sequence& __from, _Predicate __pred);
};
+ /// Like _Safe_sequence but with a special _M_invalidate_all implementation
+ /// not invalidating past-the-end iterators. Used by node based sequence.
template<typename _Sequence>
- template<typename _Predicate>
+ class _Safe_node_sequence
+ : public _Safe_sequence<_Sequence>
+ {
+ protected:
void
- _Safe_sequence<_Sequence>::
- _M_invalidate_if(_Predicate __pred)
+ _M_invalidate_all()
{
- typedef typename _Sequence::iterator iterator;
- typedef typename _Sequence::const_iterator const_iterator;
-
- for (_Safe_iterator_base* __iter = _M_iterators; __iter; )
- {
- iterator* __victim = static_cast<iterator*>(__iter);
- __iter = __iter->_M_next;
- if (!__victim->_M_singular())
- {
- if (__pred(__victim->base()))
- __victim->_M_invalidate();
- }
- }
-
- for (_Safe_iterator_base* __iter2 = _M_const_iterators; __iter2; )
- {
- const_iterator* __victim = static_cast<const_iterator*>(__iter2);
- __iter2 = __iter2->_M_next;
- if (!__victim->_M_singular())
- {
- if (__pred(__victim->base()))
- __victim->_M_invalidate();
- }
- }
+ typedef typename _Sequence::const_iterator _Const_iterator;
+ typedef typename _Const_iterator::iterator_type _Base_const_iterator;
+ typedef __gnu_debug::_Not_equal_to<_Base_const_iterator> _Not_equal;
+ const _Sequence& __seq = *static_cast<_Sequence*>(this);
+ this->_M_invalidate_if(_Not_equal(__seq._M_base().end()));
}
+ };
- template<typename _Sequence>
- template<typename _Iterator>
- void
- _Safe_sequence<_Sequence>::
- _M_transfer_iter(const _Safe_iterator<_Iterator, _Sequence>& __x)
- {
- _Safe_sequence_base* __from = __x._M_sequence;
- if (!__from)
- return;
-
- typedef typename _Sequence::iterator iterator;
- typedef typename _Sequence::const_iterator const_iterator;
-
- for (_Safe_iterator_base* __iter = __from->_M_iterators; __iter; )
- {
- iterator* __victim = static_cast<iterator*>(__iter);
- __iter = __iter->_M_next;
- if (!__victim->_M_singular() && __victim->base() == __x.base())
- __victim->_M_attach(static_cast<_Sequence*>(this));
- }
-
- for (_Safe_iterator_base* __iter2 = __from->_M_const_iterators;
- __iter2;)
- {
- const_iterator* __victim = static_cast<const_iterator*>(__iter2);
- __iter2 = __iter2->_M_next;
- if (!__victim->_M_singular() && __victim->base() == __x.base())
- __victim->_M_attach(static_cast<_Sequence*>(this));
- }
- }
} // namespace __gnu_debug
+#include <debug/safe_sequence.tcc>
+
#endif
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