1 // -*- C++ -*- 2 3 // Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 4 // Free Software Foundation, Inc. 5 // 6 // This file is part of the GNU ISO C++ Library. This library is free 7 // software; you can redistribute it and/or modify it under the terms 8 // of the GNU General Public License as published by the Free Software 9 // Foundation; either version 3, or (at your option) any later 10 // version. 11 12 // This library is distributed in the hope that it will be useful, but 13 // WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 // General Public License for more details. 16 17 // Under Section 7 of GPL version 3, you are granted additional 18 // permissions described in the GCC Runtime Library Exception, version 19 // 3.1, as published by the Free Software Foundation. 20 21 // You should have received a copy of the GNU General Public License and 22 // a copy of the GCC Runtime Library Exception along with this program; 23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 // <http://www.gnu.org/licenses/>. 25 26 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 27 28 // Permission to use, copy, modify, sell, and distribute this software 29 // is hereby granted without fee, provided that the above copyright 30 // notice appears in all copies, and that both that copyright notice 31 // and this permission notice appear in supporting documentation. None 32 // of the above authors, nor IBM Haifa Research Laboratories, make any 33 // representation about the suitability of this software for any 34 // purpose. It is provided "as is" without express or implied 35 // warranty. 36 37 /** 38 * @file resize_fn_imps.hpp 39 * Contains implementations of cc_ht_map_'s resize related functions. 40 */ 41 42 PB_DS_CLASS_T_DEC 43 inline bool 44 PB_DS_CLASS_C_DEC:: 45 do_resize_if_needed() 46 { 47 if (!resize_base::is_resize_needed()) 48 return false; 49 resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e)); 50 return true; 51 } 52 53 PB_DS_CLASS_T_DEC 54 void 55 PB_DS_CLASS_C_DEC:: 56 do_resize(size_type len) 57 { resize_imp(resize_base::get_nearest_larger_size(len)); } 58 59 PB_DS_CLASS_T_DEC 60 inline void 61 PB_DS_CLASS_C_DEC:: 62 do_resize_if_needed_no_throw() 63 { 64 if (!resize_base::is_resize_needed()) 65 return; 66 67 __try 68 { 69 resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e)); 70 } 71 __catch(...) 72 { } 73 74 _GLIBCXX_DEBUG_ONLY(assert_valid();) 75 } 76 77 PB_DS_CLASS_T_DEC 78 void 79 PB_DS_CLASS_C_DEC:: 80 resize_imp(size_type new_size) 81 { 82 _GLIBCXX_DEBUG_ONLY(assert_valid();) 83 if (new_size == m_num_e) 84 return; 85 86 const size_type old_size = m_num_e; 87 entry_pointer_array a_p_entries_resized; 88 89 // Following line might throw an exception. 90 ranged_hash_fn_base::notify_resized(new_size); 91 92 __try 93 { 94 // Following line might throw an exception. 95 a_p_entries_resized = s_entry_pointer_allocator.allocate(new_size); 96 m_num_e = new_size; 97 } 98 __catch(...) 99 { 100 ranged_hash_fn_base::notify_resized(old_size); 101 __throw_exception_again; 102 } 103 104 // At this point no exceptions can be thrown. 105 resize_imp_no_exceptions(new_size, a_p_entries_resized, old_size); 106 Resize_Policy::notify_resized(new_size); 107 _GLIBCXX_DEBUG_ONLY(assert_valid();) 108 } 109 110 PB_DS_CLASS_T_DEC 111 void 112 PB_DS_CLASS_C_DEC:: 113 resize_imp_no_exceptions(size_type new_size, entry_pointer_array a_p_entries_resized, size_type old_size) 114 { 115 std::fill(a_p_entries_resized, a_p_entries_resized + m_num_e, 116 entry_pointer(0)); 117 118 for (size_type pos = 0; pos < old_size; ++pos) 119 { 120 entry_pointer p_e = m_entries[pos]; 121 while (p_e != 0) 122 p_e = resize_imp_no_exceptions_reassign_pointer(p_e, a_p_entries_resized, traits_base::m_store_extra_indicator); 123 } 124 125 m_num_e = new_size; 126 _GLIBCXX_DEBUG_ONLY(assert_entry_pointer_array_valid(a_p_entries_resized);) 127 s_entry_pointer_allocator.deallocate(m_entries, old_size); 128 m_entries = a_p_entries_resized; 129 _GLIBCXX_DEBUG_ONLY(assert_valid();) 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
