1// -*- C++ -*-
2
3// Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011
4// Free Software Foundation, Inc.
5//
6// This file is part of the GNU ISO C++ Library.  This library is free
7// software; you can redistribute it and/or modify it under the terms
8// of the GNU General Public License as published by the Free Software
9// Foundation; either version 3, or (at your option) any later
10// version.
11
12// This library is distributed in the hope that it will be useful, but
13// WITHOUT ANY WARRANTY; without even the implied warranty of
14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15// General Public License for more details.
16
17// Under Section 7 of GPL version 3, you are granted additional
18// permissions described in the GCC Runtime Library Exception, version
19// 3.1, as published by the Free Software Foundation.
20
21// You should have received a copy of the GNU General Public License and
22// a copy of the GCC Runtime Library Exception along with this program;
23// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
24// <http://www.gnu.org/licenses/>.
25
26// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
27
28// Permission to use, copy, modify, sell, and distribute this software
29// is hereby granted without fee, provided that the above copyright
30// notice appears in all copies, and that both that copyright notice
31// and this permission notice appear in supporting documentation. None
32// of the above authors, nor IBM Haifa Research Laboratories, make any
33// representation about the suitability of this software for any
34// purpose. It is provided "as is" without express or implied
35// warranty.
36
37/**
38 * @file gp_hash_table_map_/resize_fn_imps.hpp
39 * Contains implementations of gp_ht_map_'s resize related functions.
40 */
41
42PB_DS_CLASS_T_DEC
43inline bool
44PB_DS_CLASS_C_DEC::
45do_resize_if_needed()
46{
47  if (!resize_base::is_resize_needed())
48    return false;
49  resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e));
50  return true;
51}
52
53PB_DS_CLASS_T_DEC
54void
55PB_DS_CLASS_C_DEC::
56do_resize(size_type n)
57{ resize_imp(resize_base::get_nearest_larger_size(n)); }
58
59PB_DS_CLASS_T_DEC
60inline void
61PB_DS_CLASS_C_DEC::
62do_resize_if_needed_no_throw()
63{
64  if (!resize_base::is_resize_needed())
65    return;
66
67  __try
68    {
69      resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e));
70    }
71  __catch(...)
72    { }
73
74  PB_DS_ASSERT_VALID((*this))
75}
76
77PB_DS_CLASS_T_DEC
78void
79PB_DS_CLASS_C_DEC::
80resize_imp(size_type new_size)
81{
82#ifdef PB_DS_REGRESSION
83  typename _Alloc::group_adjustor adjust(m_num_e);
84#endif
85
86  if (new_size == m_num_e)
87    return;
88
89  PB_DS_ASSERT_VALID((*this))
90  const size_type old_size = m_num_e;
91  entry_array a_entries_resized = 0;
92
93  // Following line might throw an exception.
94  a_entries_resized = s_entry_allocator.allocate(new_size);
95
96  ranged_probe_fn_base::notify_resized(new_size);
97  m_num_e = new_size;
98
99  for (size_type i = 0; i < m_num_e; ++i)
100    a_entries_resized[i].m_stat = empty_entry_status;
101
102  __try
103    {
104      resize_imp(a_entries_resized, old_size);
105    }
106  __catch(...)
107    {
108      erase_all_valid_entries(a_entries_resized, new_size);
109      m_num_e = old_size;
110      s_entry_allocator.deallocate(a_entries_resized, new_size);
111      ranged_probe_fn_base::notify_resized(old_size);
112      __throw_exception_again;
113    }
114
115  // At this point no exceptions can be thrown.
116  _GLIBCXX_DEBUG_ONLY(assert_entry_array_valid(a_entries_resized,
117					       traits_base::m_store_extra_indicator,
118					       __FILE__, __LINE__);)
119
120  Resize_Policy::notify_resized(new_size);
121  erase_all_valid_entries(m_entries, old_size);
122  s_entry_allocator.deallocate(m_entries, old_size);
123  m_entries = a_entries_resized;
124  PB_DS_ASSERT_VALID((*this))
125}
126
127PB_DS_CLASS_T_DEC
128void
129PB_DS_CLASS_C_DEC::
130resize_imp(entry_array a_entries_resized, size_type old_size)
131{
132  for (size_type pos = 0; pos < old_size; ++pos)
133    if (m_entries[pos].m_stat == valid_entry_status)
134      resize_imp_reassign(m_entries + pos, a_entries_resized,
135			  traits_base::m_store_extra_indicator);
136}
137
138#include <ext/pb_ds/detail/gp_hash_table_map_/resize_no_store_hash_fn_imps.hpp>
139#include <ext/pb_ds/detail/gp_hash_table_map_/resize_store_hash_fn_imps.hpp>
140
141