1// Safe sequence implementation  -*- C++ -*-
2
3// Copyright (C) 2010-2013 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
23// <http://www.gnu.org/licenses/>.
24
25/** @file debug/safe_sequence.tcc
26 *  This file is a GNU debug extension to the Standard C++ Library.
27 */
28
29#ifndef _GLIBCXX_DEBUG_SAFE_SEQUENCE_TCC
30#define _GLIBCXX_DEBUG_SAFE_SEQUENCE_TCC 1
31
32namespace __gnu_debug
33{
34  template<typename _Sequence>
35    template<typename _Predicate>
36      void
37      _Safe_sequence<_Sequence>::
38      _M_invalidate_if(_Predicate __pred)
39      {
40        typedef typename _Sequence::iterator iterator;
41        typedef typename _Sequence::const_iterator const_iterator;
42
43	__gnu_cxx::__scoped_lock sentry(this->_M_get_mutex());
44        for (_Safe_iterator_base* __iter = _M_iterators; __iter;)
45	  {
46	    iterator* __victim = static_cast<iterator*>(__iter);
47	    __iter = __iter->_M_next;
48	    if (!__victim->_M_singular() && __pred(__victim->base()))
49	      {
50		__victim->_M_invalidate();
51	      }
52	  }
53
54        for (_Safe_iterator_base* __iter2 = _M_const_iterators; __iter2;)
55	  {
56	    const_iterator* __victim = static_cast<const_iterator*>(__iter2);
57	    __iter2 = __iter2->_M_next;
58	    if (!__victim->_M_singular() && __pred(__victim->base()))
59	      {
60		__victim->_M_invalidate();
61	      }
62	  }
63      }
64
65  template<typename _Sequence>
66    template<typename _Predicate>
67      void
68      _Safe_sequence<_Sequence>::
69      _M_transfer_from_if(_Safe_sequence& __from, _Predicate __pred)
70      {
71        typedef typename _Sequence::iterator iterator;
72        typedef typename _Sequence::const_iterator const_iterator;
73
74	_Safe_iterator_base* __transfered_iterators = 0;
75	_Safe_iterator_base* __transfered_const_iterators = 0;
76	_Safe_iterator_base* __last_iterator = 0;
77	_Safe_iterator_base* __last_const_iterator = 0;
78	{
79	  // We lock __from first and detach iterator(s) to transfer
80	  __gnu_cxx::__scoped_lock sentry(__from._M_get_mutex());
81
82          for (_Safe_iterator_base* __iter = __from._M_iterators; __iter;)
83	    {
84	      iterator* __victim = static_cast<iterator*>(__iter);
85	      __iter = __iter->_M_next;
86	      if (!__victim->_M_singular() && __pred(__victim->base()))
87		{
88		  __victim->_M_detach_single();
89		  if (__transfered_iterators)
90		    {
91		      __victim->_M_next = __transfered_iterators;
92		      __transfered_iterators->_M_prior = __victim;
93		    }
94		  else
95		    __last_iterator = __victim;
96		  __victim->_M_sequence = this;
97		  __victim->_M_version = this->_M_version;
98		  __transfered_iterators = __victim;
99		}
100	    }
101
102	  for (_Safe_iterator_base* __iter2 = __from._M_const_iterators;
103		 __iter2;)
104	    {
105	      const_iterator* __victim = static_cast<const_iterator*>(__iter2);
106	      __iter2 = __iter2->_M_next;
107	      if (!__victim->_M_singular() && __pred(__victim->base()))
108		{
109		  __victim->_M_detach_single();
110		  if (__transfered_const_iterators)
111		    {
112		      __victim->_M_next = __transfered_const_iterators;
113		      __transfered_const_iterators->_M_prior = __victim;
114		    }
115		  else
116		    __last_const_iterator = __victim;
117		  __victim->_M_sequence = this;
118		  __victim->_M_version = this->_M_version;
119		  __transfered_const_iterators = __victim;
120		}
121	    }
122	}
123
124	// Now we can lock *this and add the transfered iterators if any
125	if (__last_iterator || __last_const_iterator)
126	  {
127	    __gnu_cxx::__scoped_lock sentry(this->_M_get_mutex());
128	    if (__last_iterator)
129	      {
130		if (this->_M_iterators)
131		  {
132		    this->_M_iterators->_M_prior = __last_iterator;
133		    __last_iterator->_M_next = this->_M_iterators;
134		  }
135		this->_M_iterators = __transfered_iterators;
136	      }
137	    if (__last_const_iterator)
138	      {
139		if (this->_M_const_iterators)
140		  {
141		    this->_M_const_iterators->_M_prior = __last_const_iterator;
142		    __last_const_iterator->_M_next = this->_M_const_iterators;
143		  }
144		this->_M_const_iterators = __transfered_const_iterators;
145	      }
146	  }
147      }
148} // namespace __gnu_debug
149
150#endif
151