1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
// Safe container implementation -*- C++ -*-
// Copyright (C) 2014-2018 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_container.h
* This file is a GNU debug extension to the Standard C++ Library.
*/
#ifndef _GLIBCXX_DEBUG_SAFE_CONTAINER_H
#define _GLIBCXX_DEBUG_SAFE_CONTAINER_H 1
#include <ext/alloc_traits.h>
namespace __gnu_debug
{
/// Safe class dealing with some allocator dependent operations.
template<typename _SafeContainer,
typename _Alloc,
template<typename> class _SafeBase,
bool _IsCxx11AllocatorAware = true>
class _Safe_container
: public _SafeBase<_SafeContainer>
{
typedef _SafeBase<_SafeContainer> _Base;
_SafeContainer&
_M_cont() _GLIBCXX_NOEXCEPT
{ return *static_cast<_SafeContainer*>(this); }
protected:
_Safe_container&
_M_safe() _GLIBCXX_NOEXCEPT
{ return *this; }
#if __cplusplus >= 201103L
_Safe_container() = default;
_Safe_container(const _Safe_container&) = default;
_Safe_container(_Safe_container&&) = default;
_Safe_container(_Safe_container&& __x, const _Alloc& __a)
: _Safe_container()
{
if (__x._M_cont().get_allocator() == __a)
_Base::_M_swap(__x);
else
__x._M_invalidate_all();
}
#endif
public:
// Copy assignment invalidate all iterators.
_Safe_container&
operator=(const _Safe_container&) _GLIBCXX_NOEXCEPT
{
this->_M_invalidate_all();
return *this;
}
#if __cplusplus >= 201103L
_Safe_container&
operator=(_Safe_container&& __x) noexcept
{
__glibcxx_check_self_move_assign(__x);
if (_IsCxx11AllocatorAware)
{
typedef __gnu_cxx::__alloc_traits<_Alloc> _Alloc_traits;
bool __xfer_memory = _Alloc_traits::_S_propagate_on_move_assign()
|| _M_cont().get_allocator() == __x._M_cont().get_allocator();
if (__xfer_memory)
_Base::_M_swap(__x);
else
this->_M_invalidate_all();
}
else
_Base::_M_swap(__x);
__x._M_invalidate_all();
return *this;
}
void
_M_swap(_Safe_container& __x) noexcept
{
if (_IsCxx11AllocatorAware)
{
typedef __gnu_cxx::__alloc_traits<_Alloc> _Alloc_traits;
if (!_Alloc_traits::_S_propagate_on_swap())
__glibcxx_check_equal_allocs(this->_M_cont()._M_base(),
__x._M_cont()._M_base());
}
_Base::_M_swap(__x);
}
#endif
};
} // namespace __gnu_debug
#endif
|
