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1 | // -*- C++ -*- |
2 | ||
8fc81078 | 3 | // Copyright (C) 2005, 2006, 2009, 2010 Free Software Foundation, Inc. |
4569a895 AT |
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 | |
748086b7 | 8 | // Foundation; either version 3, or (at your option) any later |
4569a895 AT |
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 | ||
748086b7 JJ |
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. | |
4569a895 | 19 | |
748086b7 JJ |
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/>. | |
4569a895 AT |
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 sample_resize_policy.hpp | |
38 | * Contains a sample resize policy for hash tables. | |
39 | */ | |
40 | ||
41 | #ifndef PB_DS_SAMPLE_RESIZE_POLICY_HPP | |
42 | #define PB_DS_SAMPLE_RESIZE_POLICY_HPP | |
43 | ||
44 | // A sample resize policy. | |
45 | class sample_resize_policy | |
46 | { | |
4569a895 AT |
47 | public: |
48 | ||
49 | // Size type. | |
8fc81078 | 50 | typedef std::size_t size_type; |
4569a895 | 51 | |
4569a895 AT |
52 | // Default constructor. |
53 | sample_resize_policy(); | |
54 | ||
55 | // Copy constructor. | |
56 | sample_range_hashing(const sample_resize_policy& other); | |
57 | ||
58 | // Swaps content. | |
59 | inline void | |
60 | swap(sample_resize_policy& other); | |
61 | ||
62 | protected: | |
63 | ||
64 | // Notifies a search started. | |
65 | inline void | |
66 | notify_insert_search_start(); | |
67 | ||
68 | // Notifies a search encountered a collision. | |
69 | inline void | |
70 | notify_insert_search_collision(); | |
71 | ||
72 | // Notifies a search ended. | |
73 | inline void | |
74 | notify_insert_search_end(); | |
75 | ||
76 | // Notifies a search started. | |
77 | inline void | |
78 | notify_find_search_start(); | |
79 | ||
80 | // Notifies a search encountered a collision. | |
81 | inline void | |
82 | notify_find_search_collision(); | |
83 | ||
84 | // Notifies a search ended. | |
85 | inline void | |
86 | notify_find_search_end(); | |
87 | ||
88 | // Notifies a search started. | |
89 | inline void | |
90 | notify_erase_search_start(); | |
91 | ||
92 | // Notifies a search encountered a collision. | |
93 | inline void | |
94 | notify_erase_search_collision(); | |
95 | ||
96 | // Notifies a search ended. | |
97 | inline void | |
98 | notify_erase_search_end(); | |
99 | ||
100 | // Notifies an element was inserted. | |
101 | inline void | |
102 | notify_inserted(size_type num_e); | |
103 | ||
104 | // Notifies an element was erased. | |
105 | inline void | |
106 | notify_erased(size_type num_e); | |
107 | ||
108 | // Notifies the table was cleared. | |
109 | void | |
110 | notify_cleared(); | |
111 | ||
112 | // Notifies the table was resized to new_size. | |
113 | void | |
114 | notify_resized(size_type new_size); | |
115 | ||
116 | // Queries whether a resize is needed. | |
117 | inline bool | |
118 | is_resize_needed() const; | |
119 | ||
120 | // Queries what the new size should be. | |
121 | size_type | |
122 | get_new_size(size_type size, size_type num_used_e) const; | |
4569a895 AT |
123 | }; |
124 | ||
d7f245b1 | 125 | #endif |