1 // -*- C++ -*- 2 3 // Copyright (C) 2005-2013 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
