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  1. // -*- C++ -*-
  2.  
  3. // Copyright (C) 2005-2015 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 terms
  7. // of the GNU General Public License as published by the Free Software
  8. // Foundation; either version 3, or (at your option) any later
  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.  
  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.
  19.  
  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/>.
  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. /**
  37.  * @file gp_hash_table_map_/resize_fn_imps.hpp
  38.  * Contains implementations of gp_ht_map_'s resize related functions.
  39.  */
  40.  
  41. PB_DS_CLASS_T_DEC
  42. inline bool
  43. PB_DS_CLASS_C_DEC::
  44. do_resize_if_needed()
  45. {
  46.   if (!resize_base::is_resize_needed())
  47.     return false;
  48.   resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e));
  49.   return true;
  50. }
  51.  
  52. PB_DS_CLASS_T_DEC
  53. void
  54. PB_DS_CLASS_C_DEC::
  55. do_resize(size_type n)
  56. { resize_imp(resize_base::get_nearest_larger_size(n)); }
  57.  
  58. PB_DS_CLASS_T_DEC
  59. inline void
  60. PB_DS_CLASS_C_DEC::
  61. do_resize_if_needed_no_throw()
  62. {
  63.   if (!resize_base::is_resize_needed())
  64.     return;
  65.  
  66.   __try
  67.     {
  68.       resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e));
  69.     }
  70.   __catch(...)
  71.     { }
  72.  
  73.   PB_DS_ASSERT_VALID((*this))
  74. }
  75.  
  76. PB_DS_CLASS_T_DEC
  77. void
  78. PB_DS_CLASS_C_DEC::
  79. resize_imp(size_type new_size)
  80. {
  81. #ifdef PB_DS_REGRESSION
  82.   typename _Alloc::group_adjustor adjust(m_num_e);
  83. #endif
  84.  
  85.   if (new_size == m_num_e)
  86.     return;
  87.  
  88.   PB_DS_ASSERT_VALID((*this))
  89.   const size_type old_size = m_num_e;
  90.   entry_array a_entries_resized = 0;
  91.  
  92.   // Following line might throw an exception.
  93.   a_entries_resized = s_entry_allocator.allocate(new_size);
  94.  
  95.   ranged_probe_fn_base::notify_resized(new_size);
  96.   m_num_e = new_size;
  97.  
  98.   for (size_type i = 0; i < m_num_e; ++i)
  99.     a_entries_resized[i].m_stat = empty_entry_status;
  100.  
  101.   __try
  102.     {
  103.       resize_imp(a_entries_resized, old_size);
  104.     }
  105.   __catch(...)
  106.     {
  107.       erase_all_valid_entries(a_entries_resized, new_size);
  108.       m_num_e = old_size;
  109.       s_entry_allocator.deallocate(a_entries_resized, new_size);
  110.       ranged_probe_fn_base::notify_resized(old_size);
  111.       __throw_exception_again;
  112.     }
  113.  
  114.   // At this point no exceptions can be thrown.
  115.   _GLIBCXX_DEBUG_ONLY(assert_entry_array_valid(a_entries_resized,
  116.                                                traits_base::m_store_extra_indicator,
  117.                                                __FILE__, __LINE__);)
  118.  
  119.   Resize_Policy::notify_resized(new_size);
  120.   erase_all_valid_entries(m_entries, old_size);
  121.   s_entry_allocator.deallocate(m_entries, old_size);
  122.   m_entries = a_entries_resized;
  123.   PB_DS_ASSERT_VALID((*this))
  124. }
  125.  
  126. PB_DS_CLASS_T_DEC
  127. void
  128. PB_DS_CLASS_C_DEC::
  129. resize_imp(entry_array a_entries_resized, size_type old_size)
  130. {
  131.   for (size_type pos = 0; pos < old_size; ++pos)
  132.     if (m_entries[pos].m_stat == valid_entry_status)
  133.       resize_imp_reassign(m_entries + pos, a_entries_resized,
  134.                           traits_base::m_store_extra_indicator);
  135. }
  136.  
  137. #include <ext/pb_ds/detail/gp_hash_table_map_/resize_no_store_hash_fn_imps.hpp>
  138. #include <ext/pb_ds/detail/gp_hash_table_map_/resize_store_hash_fn_imps.hpp>
  139.  
  140.