1// -*- C++ -*-
2
3// Copyright (C) 2005 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 2, 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// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING.  If not, write to the Free
18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19// USA.
20
21// As a special exception, you may use this file as part of a free software
22// library without restriction.  Specifically, if other files instantiate
23// templates or use macros or inline functions from this file, or you compile
24// this file and link it with other files to produce an executable, this
25// file does not by itself cause the resulting executable to be covered by
26// the GNU General Public License.  This exception does not however
27// invalidate any other reasons why the executable file might be covered by
28// the GNU General Public License.
29
30// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
31
32// Permission to use, copy, modify, sell, and distribute this software
33// is hereby granted without fee, provided that the above copyright
34// notice appears in all copies, and that both that copyright notice and
35// this permission notice appear in supporting documentation. None of
36// the above authors, nor IBM Haifa Research Laboratories, make any
37// representation about the suitability of this software for any
38// purpose. It is provided "as is" without express or implied warranty.
39
40/**
41 * @file cond_key_dtor_entry_dealtor.hpp
42 * Contains a conditional key destructor, used for exception handling.
43 */
44
45namespace pb_assoc
46{
47
48  namespace detail
49  {
50
51#define PB_ASSOC_CLASS_T_DEC \
52	template<class HT_Map>
53
54#define PB_ASSOC_CLASS_C_DEC \
55	PB_ASSOC_CKDED_CLASS_NAME< \
56		HT_Map>
57
58    /**
59     * A conditional key destructor, used for exception handling.
60     **/
61    template<class HT_Map>
62    class PB_ASSOC_CKDED_CLASS_NAME
63    {
64    public:
65      typedef typename HT_Map::entry entry;
66
67      typedef typename HT_Map::entry_allocator entry_allocator;
68
69      typedef typename HT_Map::key_type key_type;
70
71    public:
72      inline
73      PB_ASSOC_CKDED_CLASS_NAME(entry_allocator* p_a, entry* p_e);
74
75      inline
76      ~PB_ASSOC_CKDED_CLASS_NAME();
77
78      inline void
79      set_key_destruct();
80
81      inline void
82      set_no_action_destructor();
83
84    protected:
85      entry_allocator* const m_p_a;
86      entry* const m_p_e;
87
88      bool m_key_destruct;
89      bool m_no_action_destructor;
90    };
91
92    PB_ASSOC_CLASS_T_DEC
93    inline
94    PB_ASSOC_CLASS_C_DEC::
95    PB_ASSOC_CKDED_CLASS_NAME(entry_allocator* p_a, entry* p_e) :
96      m_p_a(p_a),
97      m_p_e(p_e),
98      m_key_destruct(false),
99      m_no_action_destructor(false)
100    { }
101
102    PB_ASSOC_CLASS_T_DEC
103    inline void
104    PB_ASSOC_CLASS_C_DEC::
105    set_key_destruct()
106    {
107      m_key_destruct = true;
108    }
109
110    PB_ASSOC_CLASS_T_DEC
111    inline void
112    PB_ASSOC_CLASS_C_DEC::
113    set_no_action_destructor()
114    {
115      m_no_action_destructor = true;
116    }
117
118    PB_ASSOC_CLASS_T_DEC
119    inline
120    PB_ASSOC_CLASS_C_DEC::
121    ~PB_ASSOC_CKDED_CLASS_NAME()
122    {
123      if (m_no_action_destructor)
124	return;
125
126      if (m_key_destruct)
127	m_p_e->m_value.first.~key_type();
128
129      m_p_a->deallocate(m_p_e, 1);
130    }
131
132#undef PB_ASSOC_CLASS_T_DEC
133#undef PB_ASSOC_CLASS_C_DEC
134
135  } // namespace detail
136
137} // namespace pb_assoc
138
139