old-autovect-branch/libstdc++-v3/include/ext/pb_assoc/detail/resize_policy/hash_standard_resize_policy_imp.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 hash_standard_resize_policy_imp.hpp
  42  * Contains an implementation of hash_standard_resize_policy.
  43  */
  44
  45 #ifdef PB_ASSOC_HT_STANDARD_RESIZE_POLICY_DEBUG
  46 #define PB_ASSOC_DBG_ASSERT(X) assert(X)
  47 #define PB_ASSOC_DBG_VERIFY(X) assert(X)
  48 #define PB_ASSOC_DBG_ONLY(X) X
  49 #else // #ifdef PB_ASSOC_HT_STANDARD_RESIZE_POLICY_DEBUG
  50 #define PB_ASSOC_DBG_ASSERT(X)
  51 #define PB_ASSOC_DBG_VERIFY(X) {if((X)==0);}
  52 #define PB_ASSOC_DBG_ONLY(X) ;
  53 #endif // #ifdef PB_ASSOC_HT_STANDARD_RESIZE_POLICY_DEBUG
  54
  55 PB_ASSOC_CLASS_T_DEC
  56 pb_assoc::detail::int_to_type<External_Size_Access>
  57 PB_ASSOC_CLASS_C_DEC::s_external_size_access_indicator;
  58
  59 PB_ASSOC_CLASS_T_DEC
  60 PB_ASSOC_CLASS_C_DEC::
  61 hash_standard_resize_policy(size_type suggested_size /*= 8*/) :
  62   m_size(Size_Policy::get_init_size(suggested_size))
  63 {
  64   my_trigger_policy_base::notify_externally_resized(
  65                                                     Size_Policy::get_init_size(suggested_size));
  66 }
  67
  68 PB_ASSOC_CLASS_T_DEC
  69 PB_ASSOC_CLASS_C_DEC::
  70 hash_standard_resize_policy(const Size_Policy& r_size_policy, size_type suggested_size /*= 8*/) :
  71   Size_Policy(r_size_policy),
  72   m_size(Size_Policy::get_init_size(suggested_size))
  73 { }
  74
  75 PB_ASSOC_CLASS_T_DEC
  76 PB_ASSOC_CLASS_C_DEC::
  77 hash_standard_resize_policy(const Size_Policy& r_size_policy, const Trigger_Policy& r_trigger_policy, size_type suggested_size /*= 8*/) :
  78   Size_Policy(r_size_policy),
  79   Trigger_Policy(r_trigger_policy),
  80   m_size(Size_Policy::get_init_size(suggested_size))
  81 { }
  82
  83 PB_ASSOC_CLASS_T_DEC
  84 PB_ASSOC_CLASS_C_DEC::
  85 ~hash_standard_resize_policy()
  86 { }
  87
  88 PB_ASSOC_CLASS_T_DEC
  89 void
  90 PB_ASSOC_CLASS_C_DEC::
  91 swap(PB_ASSOC_CLASS_C_DEC& r_other)
  92 {
  93   my_trigger_policy_base::swap(r_other);
  94
  95   my_size_policy_base::swap(r_other);
  96
  97   std::swap(m_size, r_other.m_size);
  98 }
  99
 100 PB_ASSOC_CLASS_T_DEC
 101 inline void
 102 PB_ASSOC_CLASS_C_DEC::
 103 notify_find_search_start()
 104 {
 105   my_trigger_policy_base::notify_find_search_start();
 106 }
 107
 108 PB_ASSOC_CLASS_T_DEC
 109 inline void
 110 PB_ASSOC_CLASS_C_DEC::
 111 notify_find_search_collision()
 112 {
 113   my_trigger_policy_base::notify_find_search_collision();
 114 }
 115
 116 PB_ASSOC_CLASS_T_DEC
 117 inline void
 118 PB_ASSOC_CLASS_C_DEC::
 119 notify_find_search_end()
 120 {
 121   my_trigger_policy_base::notify_find_search_end();
 122 }
 123
 124 PB_ASSOC_CLASS_T_DEC
 125 inline void
 126 PB_ASSOC_CLASS_C_DEC::
 127 notify_insert_search_start()
 128 {
 129   my_trigger_policy_base::notify_insert_search_start();
 130 }
 131
 132 PB_ASSOC_CLASS_T_DEC
 133 inline void
 134 PB_ASSOC_CLASS_C_DEC::
 135 notify_insert_search_collision()
 136 {
 137   my_trigger_policy_base::notify_insert_search_collision();
 138 }
 139
 140 PB_ASSOC_CLASS_T_DEC
 141 inline void
 142 PB_ASSOC_CLASS_C_DEC::
 143 notify_insert_search_end()
 144 {
 145   my_trigger_policy_base::notify_insert_search_end();
 146 }
 147
 148 PB_ASSOC_CLASS_T_DEC
 149 inline void
 150 PB_ASSOC_CLASS_C_DEC::
 151 notify_erase_search_start()
 152 {
 153   my_trigger_policy_base::notify_erase_search_start();
 154 }
 155
 156 PB_ASSOC_CLASS_T_DEC
 157 inline void
 158 PB_ASSOC_CLASS_C_DEC::
 159 notify_erase_search_collision()
 160 {
 161   my_trigger_policy_base::notify_erase_search_collision();
 162 }
 163
 164 PB_ASSOC_CLASS_T_DEC
 165 inline void
 166 PB_ASSOC_CLASS_C_DEC::
 167 notify_erase_search_end()
 168 {
 169   my_trigger_policy_base::notify_erase_search_end();
 170 }
 171
 172 PB_ASSOC_CLASS_T_DEC
 173 inline void
 174 PB_ASSOC_CLASS_C_DEC::
 175 notify_inserted(size_type num_e)
 176 {
 177   my_trigger_policy_base::notify_inserted(num_e);
 178 }
 179
 180 PB_ASSOC_CLASS_T_DEC
 181 inline void
 182 PB_ASSOC_CLASS_C_DEC::
 183 notify_erased(size_type num_e)
 184 {
 185   my_trigger_policy_base::notify_inserted(num_e);
 186 }
 187
 188 PB_ASSOC_CLASS_T_DEC
 189 void
 190 PB_ASSOC_CLASS_C_DEC::
 191 notify_cleared()
 192 {
 193   my_trigger_policy_base::notify_cleared();
 194 }
 195
 196 PB_ASSOC_CLASS_T_DEC
 197 inline bool
 198 PB_ASSOC_CLASS_C_DEC::
 199 is_resize_needed() const
 200 {
 201   return (my_trigger_policy_base::is_resize_needed());
 202 }
 203
 204 PB_ASSOC_CLASS_T_DEC
 205 typename PB_ASSOC_CLASS_C_DEC::size_type
 206 PB_ASSOC_CLASS_C_DEC::
 207 get_new_size(size_type size, size_type num_used_e) const
 208 {
 209   PB_ASSOC_DBG_ASSERT(m_size == size);
 210
 211   if (my_trigger_policy_base::
 212       is_grow_needed(size, num_used_e))
 213     return (my_size_policy_base::get_nearest_larger_size(m_size));
 214
 215   PB_ASSOC_DBG_ASSERT(my_trigger_policy_base::
 216                       is_shrink_needed(size, num_used_e));
 217
 218   return (my_size_policy_base::get_nearest_smaller_size(m_size));
 219 }
 220
 221 PB_ASSOC_CLASS_T_DEC
 222 typename PB_ASSOC_CLASS_C_DEC::size_type
 223 PB_ASSOC_CLASS_C_DEC::
 224 get_init_size() const
 225 {
 226   PB_ASSOC_DBG_ASSERT(m_size ==
 227                       my_trigger_policy_base::get_init_size());
 228
 229   return (m_size);
 230 }
 231
 232 PB_ASSOC_CLASS_T_DEC
 233 void
 234 PB_ASSOC_CLASS_C_DEC::
 235 notify_resized(size_type new_size)
 236 {
 237   my_trigger_policy_base::notify_resized(new_size);
 238
 239   m_size = new_size;
 240 }
 241
 242 PB_ASSOC_CLASS_T_DEC
 243 inline typename PB_ASSOC_CLASS_C_DEC::size_type
 244 PB_ASSOC_CLASS_C_DEC::
 245 get_actual_size() const
 246 {
 247   return (get_actual_size(s_external_size_access_indicator));
 248 }
 249
 250 PB_ASSOC_CLASS_T_DEC
 251 inline typename PB_ASSOC_CLASS_C_DEC::size_type
 252 PB_ASSOC_CLASS_C_DEC::
 253 get_actual_size(external_resize_true_indicator) const
 254 {
 255   return (m_size);
 256 }
 257
 258 PB_ASSOC_CLASS_T_DEC
 259 void
 260 PB_ASSOC_CLASS_C_DEC::
 261 resize(size_type new_size)
 262 {
 263   resize(new_size, s_external_size_access_indicator);
 264 }
 265
 266 PB_ASSOC_CLASS_T_DEC
 267 void
 268 PB_ASSOC_CLASS_C_DEC::
 269 resize(size_type new_size, external_resize_true_indicator)
 270 {
 271   size_type actual_new_size = my_size_policy_base::get_init_size(1);
 272   while (actual_new_size < new_size)
 273     {
 274       const size_type pot =
 275         my_size_policy_base::get_nearest_larger_size(actual_new_size);
 276
 277       if (pot == actual_new_size&&  pot < new_size)
 278         throw cannot_resize();
 279
 280       actual_new_size = pot;
 281     }
 282
 283   const size_type old_size = m_size;
 284
 285   try
 286     {
 287       do_resize(actual_new_size);
 288     }
 289   catch(cannot_insert& )
 290     {
 291       m_size = old_size;
 292
 293       throw cannot_resize();
 294     }
 295   catch(...)
 296     {
 297       m_size = old_size;
 298
 299       throw;
 300     }
 301 }
 302
 303 PB_ASSOC_CLASS_T_DEC
 304 void
 305 PB_ASSOC_CLASS_C_DEC::
 306 do_resize(size_type /*new_size*/)
 307 {
 308   // Tmp Ami
 309   abort();
 310 }
 311
 312 PB_ASSOC_CLASS_T_DEC
 313 Trigger_Policy&
 314 PB_ASSOC_CLASS_C_DEC::
 315 get_trigger_policy()
 316 {
 317   return (*this);
 318 }
 319
 320 PB_ASSOC_CLASS_T_DEC
 321 const Trigger_Policy&
 322 PB_ASSOC_CLASS_C_DEC::
 323 get_trigger_policy() const
 324 {
 325   return (*this);
 326 }
 327
 328 PB_ASSOC_CLASS_T_DEC
 329 Size_Policy&
 330 PB_ASSOC_CLASS_C_DEC::
 331 get_size_policy()
 332 {
 333   return (*this);
 334 }
 335
 336 PB_ASSOC_CLASS_T_DEC
 337 const Size_Policy&
 338 PB_ASSOC_CLASS_C_DEC::
 339 get_size_policy() const
 340 {
 341   return (*this);
 342 }