1 // -*- C++ -*- 2 3 // Copyright (C) 2005-2018 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 cc_hash_table_map_/resize_fn_imps.hpp 38 * Contains implementations of cc_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 len) 56 { resize_imp(resize_base::get_nearest_larger_size(len)); } 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 PB_DS_ASSERT_VALID((*this)) 82 if (new_size == m_num_e) 83 return; 84 85 const size_type old_size = m_num_e; 86 entry_pointer_array a_p_entries_resized; 87 88 // Following line might throw an exception. 89 ranged_hash_fn_base::notify_resized(new_size); 90 91 __try 92 { 93 // Following line might throw an exception. 94 a_p_entries_resized = s_entry_pointer_allocator.allocate(new_size); 95 m_num_e = new_size; 96 } 97 __catch(...) 98 { 99 ranged_hash_fn_base::notify_resized(old_size); 100 __throw_exception_again; 101 } 102 103 // At this point no exceptions can be thrown. 104 resize_imp_no_exceptions(new_size, a_p_entries_resized, old_size); 105 Resize_Policy::notify_resized(new_size); 106 PB_DS_ASSERT_VALID((*this)) 107 } 108 109 PB_DS_CLASS_T_DEC 110 void 111 PB_DS_CLASS_C_DEC:: 112 resize_imp_no_exceptions(size_type new_size, entry_pointer_array a_p_entries_resized, size_type old_size) 113 { 114 std::fill(a_p_entries_resized, a_p_entries_resized + m_num_e, 115 entry_pointer(0)); 116 117 for (size_type pos = 0; pos < old_size; ++pos) 118 { 119 entry_pointer p_e = m_entries[pos]; 120 while (p_e != 0) 121 p_e = resize_imp_no_exceptions_reassign_pointer(p_e, a_p_entries_resized, traits_base::m_store_extra_indicator); 122 } 123 124 m_num_e = new_size; 125 _GLIBCXX_DEBUG_ONLY(assert_entry_pointer_array_valid(a_p_entries_resized, 126 __FILE__, __LINE__);) 127 s_entry_pointer_allocator.deallocate(m_entries, old_size); 128 m_entries = a_p_entries_resized; 129 PB_DS_ASSERT_VALID((*this)) 130 } 131 132 #include <ext/pb_ds/detail/cc_hash_table_map_/resize_no_store_hash_fn_imps.hpp> 133 #include <ext/pb_ds/detail/cc_hash_table_map_/resize_store_hash_fn_imps.hpp> 134 135