safe_sequence.tcc
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// Safe sequence implementation -*- C++ -*-
// Copyright (C) 2010-2021 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 3, 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.
// 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.
// 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.tcc
* This file is a GNU debug extension to the Standard C++ Library.
*/
#ifndef _GLIBCXX_DEBUG_SAFE_SEQUENCE_TCC
#define _GLIBCXX_DEBUG_SAFE_SEQUENCE_TCC 1
namespace __gnu_debug
{
template<typename _Sequence>
template<typename _Predicate>
void
_Safe_sequence<_Sequence>::
_M_invalidate_if(_Predicate __pred)
{
typedef typename _Sequence::iterator iterator;
typedef typename _Sequence::const_iterator const_iterator;
__gnu_cxx::__scoped_lock sentry(this->_M_get_mutex());
for (_Safe_iterator_base* __iter = _M_iterators; __iter;)
{
iterator* __victim = static_cast<iterator*>(__iter);
__iter = __iter->_M_next;
if (!__victim->_M_singular() && __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() && __pred(__victim->base()))
{
__victim->_M_invalidate();
}
}
}
template<typename _Sequence>
template<typename _Predicate>
void
_Safe_sequence<_Sequence>::
_M_transfer_from_if(_Safe_sequence& __from, _Predicate __pred)
{
if (this == std::__addressof(__from))
return;
typedef typename _Sequence::iterator iterator;
typedef typename _Sequence::const_iterator const_iterator;
_Safe_iterator_base* __transfered_iterators = 0;
_Safe_iterator_base* __transfered_const_iterators = 0;
_Safe_iterator_base* __last_iterator = 0;
_Safe_iterator_base* __last_const_iterator = 0;
{
// We lock __from first and detach iterator(s) to transfer
__gnu_cxx::__scoped_lock sentry(__from._M_get_mutex());
for (_Safe_iterator_base* __iter = __from._M_iterators; __iter;)
{
_Safe_iterator_base* __victim_base = __iter;
iterator* __victim = static_cast<iterator*>(__victim_base);
__iter = __iter->_M_next;
if (!__victim->_M_singular() && __pred(__victim->base()))
{
__victim->_M_detach_single();
if (__transfered_iterators)
{
__victim_base->_M_next = __transfered_iterators;
__transfered_iterators->_M_prior = __victim_base;
}
else
__last_iterator = __victim_base;
__victim_base->_M_sequence = this;
__victim_base->_M_version = this->_M_version;
__transfered_iterators = __victim_base;
}
}
for (_Safe_iterator_base* __iter2 = __from._M_const_iterators;
__iter2;)
{
_Safe_iterator_base* __victim_base = __iter2;
const_iterator* __victim =
static_cast<const_iterator*>(__victim_base);
__iter2 = __iter2->_M_next;
if (!__victim->_M_singular() && __pred(__victim->base()))
{
__victim->_M_detach_single();
if (__transfered_const_iterators)
{
__victim_base->_M_next = __transfered_const_iterators;
__transfered_const_iterators->_M_prior = __victim_base;
}
else
__last_const_iterator = __victim;
__victim_base->_M_sequence = this;
__victim_base->_M_version = this->_M_version;
__transfered_const_iterators = __victim_base;
}
}
}
// Now we can lock *this and add the transfered iterators if any
if (__last_iterator || __last_const_iterator)
{
__gnu_cxx::__scoped_lock sentry(this->_M_get_mutex());
if (__last_iterator)
{
if (this->_M_iterators)
{
this->_M_iterators->_M_prior = __last_iterator;
__last_iterator->_M_next = this->_M_iterators;
}
this->_M_iterators = __transfered_iterators;
}
if (__last_const_iterator)
{
if (this->_M_const_iterators)
{
this->_M_const_iterators->_M_prior = __last_const_iterator;
__last_const_iterator->_M_next = this->_M_const_iterators;
}
this->_M_const_iterators = __transfered_const_iterators;
}
}
}
} // namespace __gnu_debug
#endif
std::__addressof
constexpr _Tp * __addressof(_Tp &__r) noexcept
Same as C++11 std::addressof.
Definition move.h:49
__gnu_debug
GNU debug classes for public use.
__gnu_debug::_Safe_sequence
Base class for constructing a safe sequence type that tracks iterators that reference it.
Definition safe_sequence.h:109
__gnu_debug::_Safe_sequence::_M_invalidate_if
void _M_invalidate_if(_Predicate __pred)
Definition safe_sequence.tcc:38
__gnu_debug::_Safe_sequence::_M_transfer_from_if
void _M_transfer_from_if(_Safe_sequence &__from, _Predicate __pred)
Definition safe_sequence.tcc:69
__gnu_debug::_Safe_iterator_base::_M_sequence
_Safe_sequence_base * _M_sequence
Definition safe_base.h:57
__gnu_debug::_Safe_iterator_base::_M_version
unsigned int _M_version
Definition safe_base.h:66
__gnu_debug::_Safe_iterator_base::_M_prior
_Safe_iterator_base * _M_prior
Definition safe_base.h:70
__gnu_debug::_Safe_iterator_base::_M_next
_Safe_iterator_base * _M_next
Definition safe_base.h:74
__gnu_debug::_Safe_sequence_base::_M_const_iterators
_Safe_iterator_base * _M_const_iterators
The list of constant iterators that reference this container.
Definition safe_base.h:197
__gnu_debug::_Safe_sequence_base::_M_get_mutex
__gnu_cxx::__mutex & _M_get_mutex()
__gnu_debug::_Safe_sequence_base::_M_iterators
_Safe_iterator_base * _M_iterators
The list of mutable iterators that reference this container.
Definition safe_base.h:194
__gnu_debug::_Safe_sequence_base::_M_version
unsigned int _M_version
The container version number. This number may never be 0.
Definition safe_base.h:200
std::__debug::iterator
__gnu_cxx::__scoped_lock
Scoped lock idiom.
Definition concurrence.h:229