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// Safe sequence implementation  -*- C++ -*-

// Copyright (C) 2010 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

// .

/** @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

    template

      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(__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(__iter2);

            __iter2 = __iter2->_M_next;

            if (!__victim->_M_singular() && __pred(__victim->base()))

              {

                __victim->_M_invalidate();

              }

          }

      }

  template

    template

      void

      _Safe_sequence<_Sequence>::

      _M_transfer_from_if(_Safe_sequence& __from, _Predicate __pred)

      {

        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;)

            {

              iterator* __victim = static_cast(__iter);

              __iter = __iter->_M_next;

              if (!__victim->_M_singular() && __pred(__victim->base()))

                {

                  __victim->_M_detach_single();

                  if (__transfered_iterators)

                    {

                      __victim->_M_next = __transfered_iterators;

                      __transfered_iterators->_M_prior = __victim;

                    }

                  else

                    __last_iterator = __victim;

                  __victim->_M_sequence = this;

                  __victim->_M_version = this->_M_version;

                  __transfered_iterators = __victim;

                }

            }

          for (_Safe_iterator_base* __iter2 = __from._M_const_iterators;

                 __iter2;)

            {

              const_iterator* __victim = static_cast(__iter2);

              __iter2 = __iter2->_M_next;

              if (!__victim->_M_singular() && __pred(__victim->base()))

                {

                  __victim->_M_detach_single();

                  if (__transfered_const_iterators)

                    {

                      __victim->_M_next = __transfered_const_iterators;

                      __transfered_const_iterators->_M_prior = __victim;

                    }

                  else

                    __last_const_iterator = __victim;

                  __victim->_M_sequence = this;

                  __victim->_M_version = this->_M_version;

                  __transfered_const_iterators = __victim;

                }

            }

        }

        // 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