1// -*- C++ -*- 2 3// Copyright (C) 2005, 2006, 2007, 2008, 2009 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 resize_fn_imps.hpp 38 * Contains implementations of cc_ht_map_'s resize related functions. 39 */ 40 41PB_DS_CLASS_T_DEC 42inline bool 43PB_DS_CLASS_C_DEC:: 44do_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 52PB_DS_CLASS_T_DEC 53void 54PB_DS_CLASS_C_DEC:: 55do_resize(size_type len) 56{ resize_imp(resize_base::get_nearest_larger_size(len)); } 57 58PB_DS_CLASS_T_DEC 59inline void 60PB_DS_CLASS_C_DEC:: 61do_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 _GLIBCXX_DEBUG_ONLY(assert_valid();) 74} 75 76PB_DS_CLASS_T_DEC 77void 78PB_DS_CLASS_C_DEC:: 79resize_imp(size_type new_size) 80{ 81 _GLIBCXX_DEBUG_ONLY(assert_valid();) 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 _GLIBCXX_DEBUG_ONLY(assert_valid();) 107} 108 109PB_DS_CLASS_T_DEC 110void 111PB_DS_CLASS_C_DEC:: 112resize_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(NULL)); 116 117 for (size_type pos = 0; pos < old_size; ++pos) 118 { 119 entry_pointer p_e = m_entries[pos]; 120 while (p_e != NULL) 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 s_entry_pointer_allocator.deallocate(m_entries, old_size); 127 m_entries = a_p_entries_resized; 128 _GLIBCXX_DEBUG_ONLY(assert_valid();) 129} 130 131#include <ext/pb_ds/detail/cc_hash_table_map_/resize_no_store_hash_fn_imps.hpp> 132#include <ext/pb_ds/detail/cc_hash_table_map_/resize_store_hash_fn_imps.hpp> 133 134