gomp-20050608-branch/libstdc++-v3/include/ext/pb_assoc/detail/gp_ht_map_/resize_fn_imps.hpp

   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 resize_fn_imps.hpp
  42  * Contains implementations of gp_ht_map_'s resize related functions.
  43  */
  44
  45 PB_ASSOC_CLASS_T_DEC
  46 inline bool
  47 PB_ASSOC_CLASS_C_DEC::
  48 do_resize_if_needed()
  49 {
  50   if (!my_resize_base::is_resize_needed())
  51     return (false);
  52
  53   do
  54     do_resize(my_resize_base::get_new_size(m_num_e, m_num_used_e));
  55   while (my_resize_base::is_resize_needed());
  56
  57   return (true);
  58 }
  59
  60 PB_ASSOC_CLASS_T_DEC
  61 inline void
  62 PB_ASSOC_CLASS_C_DEC::
  63 do_resize_if_needed_no_throw()
  64 {
  65   if (!my_resize_base::is_resize_needed())
  66     return;
  67
  68   try
  69     {
  70       do
  71         do_resize(my_resize_base::get_new_size(m_num_e, m_num_used_e));
  72       while (my_resize_base::is_resize_needed());
  73     }
  74   catch(...)
  75     { }
  76
  77   PB_ASSOC_DBG_ONLY(assert_valid();)
  78     }
  79
  80 PB_ASSOC_CLASS_T_DEC
  81 void
  82 PB_ASSOC_CLASS_C_DEC::
  83 do_resize(size_type new_size)
  84 {
  85 #ifdef PB_ASSOC_BASIC_REGRESSION
  86   throw_prob_adjustor adjust(m_num_e);
  87 #endif // #ifdef PB_ASSOC_BASIC_REGRESSION
  88
  89   PB_ASSOC_DBG_ONLY(assert_valid();)
  90
  91     const size_type old_size = m_num_e;
  92
  93   entry_array a_entries_resized = NULL;
  94
  95   my_ranged_probe_fn_base::notify_resized(new_size);
  96
  97   // Following line might throw an exception.
  98
  99   try
 100     {
 101       a_entries_resized = s_entry_allocator.allocate(new_size);
 102     }
 103   catch(...)
 104     {
 105       my_ranged_probe_fn_base::notify_resized(old_size);
 106
 107       throw;
 108     }
 109
 110   m_num_e = new_size;
 111
 112   for (size_type i = 0; i < m_num_e; ++i)
 113     a_entries_resized[i].m_stat = (entry_status)EMPTY_ENTRY_STATUS;
 114
 115   try
 116     {
 117       resize_imp(a_entries_resized, old_size);
 118     }
 119   catch(...)
 120     {
 121       erase_all_valid_entries(a_entries_resized, new_size);
 122
 123       m_num_e = old_size;
 124
 125       s_entry_allocator.deallocate(a_entries_resized, new_size);
 126
 127       my_ranged_probe_fn_base::notify_resized(old_size);
 128
 129       throw;
 130     }
 131
 132   // At this point no exceptions can be thrown.
 133
 134   PB_ASSOC_DBG_ONLY(assert_entry_array_valid(a_entries_resized, my_hash_traits_base::s_store_hash_indicator);)
 135
 136     Resize_Policy::notify_resized(new_size);
 137
 138   erase_all_valid_entries(m_a_entries, old_size);
 139
 140   s_entry_allocator.deallocate(m_a_entries, old_size);
 141
 142   m_a_entries = a_entries_resized;
 143
 144   PB_ASSOC_DBG_ONLY(assert_valid();)
 145     }
 146
 147 PB_ASSOC_CLASS_T_DEC
 148 void
 149 PB_ASSOC_CLASS_C_DEC::
 150 resize_imp(entry_array a_entries_resized, size_type old_size)
 151 {
 152   for (size_type pos = 0; pos < old_size; ++pos)
 153     if (m_a_entries[pos].m_stat == VALID_ENTRY_STATUS)
 154       resize_imp_reassign(m_a_entries + pos, a_entries_resized, my_hash_traits_base::s_store_hash_indicator);
 155 }
 156
 157 #include <ext/pb_assoc/detail/gp_ht_map_/resize_no_store_hash_fn_imps.hpp>
 158 #include <ext/pb_assoc/detail/gp_ht_map_/resize_store_hash_fn_imps.hpp>