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1 | // -*- C++ -*- | |
2 | ||
3 | // Copyright (C) 2005-2014 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 sample_resize_trigger.hpp | |
38 | * Contains a sample resize trigger policy class. | |
39 | */ | |
40 | ||
41 | #ifndef PB_DS_SAMPLE_RESIZE_TRIGGER_HPP | |
42 | #define PB_DS_SAMPLE_RESIZE_TRIGGER_HPP | |
43 | ||
44 | namespace __gnu_pbds | |
45 | { | |
46 | /// A sample resize trigger policy. | |
47 | class sample_resize_trigger | |
48 | { | |
49 | public: | |
50 | /// Size type. | |
51 | typedef std::size_t size_type; | |
52 | ||
53 | /// Default constructor. | |
54 | sample_resize_trigger(); | |
55 | ||
56 | /// Copy constructor. | |
57 | sample_range_hashing(const sample_resize_trigger&); | |
58 | ||
59 | /// Swaps content. | |
60 | inline void | |
61 | swap(sample_resize_trigger&); | |
62 | ||
63 | protected: | |
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. the total number of entries in | |
101 | /// the table is num_entries. | |
102 | inline void | |
103 | notify_inserted(size_type num_entries); | |
104 | ||
105 | /// Notifies an element was erased. | |
106 | inline void | |
107 | notify_erased(size_type num_entries); | |
108 | ||
109 | /// Notifies the table was cleared. | |
110 | void | |
111 | notify_cleared(); | |
112 | ||
113 | /// Notifies the table was resized as a result of this object's | |
114 | /// signifying that a resize is needed. | |
115 | void | |
116 | notify_resized(size_type new_size); | |
117 | ||
118 | /// Notifies the table was resized externally. | |
119 | void | |
120 | notify_externally_resized(size_type new_size); | |
121 | ||
122 | /// Queries whether a resize is needed. | |
123 | inline bool | |
124 | is_resize_needed() const; | |
125 | ||
126 | /// Queries whether a grow is needed. | |
127 | inline bool | |
128 | is_grow_needed(size_type size, size_type num_entries) const; | |
129 | ||
130 | private: | |
131 | /// Resizes to new_size. | |
132 | virtual void | |
133 | do_resize(size_type); | |
134 | }; | |
135 | } | |
136 | #endif |