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4569a895 AT |
1 | // -*- C++ -*- |
2 | ||
3 | // Copyright (C) 2005, 2006 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 2, 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 | // You should have received a copy of the GNU General Public License | |
17 | // along with this library; see the file COPYING. If not, write to | |
18 | // the Free Software Foundation, 59 Temple Place - Suite 330, Boston, | |
19 | // MA 02111-1307, USA. | |
20 | ||
21 | // As a special exception, you may use this file as part of a free | |
22 | // software library without restriction. Specifically, if other files | |
23 | // instantiate templates or use macros or inline functions from this | |
24 | // file, or you compile this file and link it with other files to | |
25 | // produce an executable, this file does not by itself cause the | |
26 | // resulting executable to be covered by the GNU General Public | |
27 | // License. This exception does not however invalidate any other | |
28 | // reasons why the executable file might be covered by the GNU General | |
29 | // Public License. | |
30 | ||
31 | // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. | |
32 | ||
33 | // Permission to use, copy, modify, sell, and distribute this software | |
34 | // is hereby granted without fee, provided that the above copyright | |
35 | // notice appears in all copies, and that both that copyright notice | |
36 | // and this permission notice appear in supporting documentation. None | |
37 | // of the above authors, nor IBM Haifa Research Laboratories, make any | |
38 | // representation about the suitability of this software for any | |
39 | // purpose. It is provided "as is" without express or implied | |
40 | // warranty. | |
41 | ||
42 | /** | |
43 | * @file sample_resize_trigger.hpp | |
44 | * Contains a sample resize trigger policy class. | |
45 | */ | |
46 | ||
47 | #ifndef PB_DS_SAMPLE_RESIZE_TRIGGER_HPP | |
48 | #define PB_DS_SAMPLE_RESIZE_TRIGGER_HPP | |
49 | ||
50 | // A sample resize trigger policy. | |
51 | class sample_resize_trigger | |
52 | { | |
4569a895 AT |
53 | public: |
54 | ||
55 | // Size type. | |
56 | typedef size_t size_type; | |
57 | ||
4569a895 AT |
58 | // Default constructor. |
59 | sample_resize_trigger(); | |
60 | ||
61 | // Copy constructor. | |
62 | sample_range_hashing(const sample_resize_trigger& other); | |
63 | ||
64 | // Swaps content. | |
65 | inline void | |
66 | swap(sample_resize_trigger& other); | |
67 | ||
68 | protected: | |
69 | ||
70 | // Notifies a search started. | |
71 | inline void | |
72 | notify_insert_search_start(); | |
73 | ||
74 | // Notifies a search encountered a collision. | |
75 | inline void | |
76 | notify_insert_search_collision(); | |
77 | ||
78 | // Notifies a search ended. | |
79 | inline void | |
80 | notify_insert_search_end(); | |
81 | ||
82 | // Notifies a search started. | |
83 | inline void | |
84 | notify_find_search_start(); | |
85 | ||
86 | // Notifies a search encountered a collision. | |
87 | inline void | |
88 | notify_find_search_collision(); | |
89 | ||
90 | // Notifies a search ended. | |
91 | inline void | |
92 | notify_find_search_end(); | |
93 | ||
94 | // Notifies a search started. | |
95 | inline void | |
96 | notify_erase_search_start(); | |
97 | ||
98 | // Notifies a search encountered a collision. | |
99 | inline void | |
100 | notify_erase_search_collision(); | |
101 | ||
102 | // Notifies a search ended. | |
103 | inline void | |
104 | notify_erase_search_end(); | |
105 | ||
d7f245b1 BK |
106 | // Notifies an element was inserted. the total number of entries in |
107 | // the table is num_entries. | |
4569a895 AT |
108 | inline void |
109 | notify_inserted(size_type num_entries); | |
110 | ||
111 | // Notifies an element was erased. | |
112 | inline void | |
113 | notify_erased(size_type num_entries); | |
114 | ||
115 | // Notifies the table was cleared. | |
116 | void | |
117 | notify_cleared(); | |
118 | ||
d7f245b1 BK |
119 | // Notifies the table was resized as a result of this object's |
120 | // signifying that a resize is needed. | |
4569a895 AT |
121 | void |
122 | notify_resized(size_type new_size); | |
123 | ||
124 | // Notifies the table was resized externally. | |
125 | void | |
126 | notify_externally_resized(size_type new_size); | |
127 | ||
128 | // Queries whether a resize is needed. | |
129 | inline bool | |
130 | is_resize_needed() const; | |
131 | ||
132 | // Queries whether a grow is needed. | |
133 | inline bool | |
134 | is_grow_needed(size_type size, size_type num_entries) const; | |
135 | ||
136 | private: | |
137 | ||
138 | // Resizes to new_size. | |
139 | virtual void | |
140 | do_resize(size_type new_size); | |
4569a895 AT |
141 | }; |
142 | ||
143 | } // namespace pb_ds | |
144 | ||
d7f245b1 | 145 | #endif |