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1 | // -*- C++ -*- |
2 | ||
a5544970 | 3 | // Copyright (C) 2005-2019 Free Software Foundation, Inc. |
4569a895 AT |
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 terms | |
7 | // of the GNU General Public License as published by the Free Software | |
748086b7 | 8 | // Foundation; either version 3, or (at your option) any later |
4569a895 AT |
9 | // version. |
10 | ||
11 | // This library is distributed in the hope that it will be useful, but | |
12 | // WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | // General Public License for more details. | |
15 | ||
748086b7 JJ |
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. | |
4569a895 | 19 | |
748086b7 JJ |
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/>. | |
4569a895 AT |
24 | |
25 | // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. | |
26 | ||
27 | // Permission to use, copy, modify, sell, and distribute this software | |
28 | // is hereby granted without fee, provided that the above copyright | |
29 | // notice appears in all copies, and that both that copyright notice | |
30 | // and this permission notice appear in supporting documentation. None | |
31 | // of the above authors, nor IBM Haifa Research Laboratories, make any | |
32 | // representation about the suitability of this software for any | |
33 | // purpose. It is provided "as is" without express or implied | |
34 | // warranty. | |
35 | ||
36 | /** | |
a345e45d | 37 | * @file detail/cond_dealtor.hpp |
4569a895 AT |
38 | * Contains a conditional deallocator. |
39 | */ | |
40 | ||
41 | #ifndef PB_DS_COND_DEALTOR_HPP | |
42 | #define PB_DS_COND_DEALTOR_HPP | |
43 | ||
ec541f1b JW |
44 | #include <ext/pb_ds/detail/types_traits.hpp> |
45 | ||
5e11f978 | 46 | namespace __gnu_pbds |
4569a895 | 47 | { |
4569a895 AT |
48 | namespace detail |
49 | { | |
a345e45d BK |
50 | /// Conditional deallocate constructor argument. |
51 | template<typename Entry, typename _Alloc> | |
52 | class cond_dealtor | |
53 | { | |
ec541f1b | 54 | typedef rebind_traits<_Alloc, Entry> alloc_traits; |
a345e45d BK |
55 | |
56 | public: | |
ec541f1b JW |
57 | typedef typename alloc_traits::allocator_type entry_allocator; |
58 | typedef typename alloc_traits::pointer entry_pointer; | |
a345e45d BK |
59 | |
60 | cond_dealtor(entry_pointer p_e) | |
61 | : m_p_e(p_e), m_no_action_destructor(false) { } | |
62 | ||
63 | ~cond_dealtor() | |
64 | { | |
65 | if (m_no_action_destructor) | |
66 | return; | |
67 | s_alloc.deallocate(m_p_e, 1); | |
68 | } | |
69 | ||
70 | void | |
71 | set_no_action() | |
72 | { m_no_action_destructor = true; } | |
73 | ||
74 | private: | |
75 | entry_pointer m_p_e; | |
76 | bool m_no_action_destructor; | |
77 | static entry_allocator s_alloc; | |
78 | }; | |
79 | ||
80 | template<typename Entry, class _Alloc> | |
81 | typename cond_dealtor<Entry, _Alloc>::entry_allocator | |
82 | cond_dealtor<Entry, _Alloc>::s_alloc; | |
4569a895 | 83 | } // namespace detail |
5e11f978 | 84 | } // namespace __gnu_pbds |
4569a895 AT |
85 | |
86 | #endif // #ifndef PB_DS_COND_DEALTOR_HPP |