libstdc++
sample_resize_policy.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005, 2006, 2009, 2010 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
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8 // Foundation; either version 3, or (at your option) any later
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11 // This library is distributed in the hope that it will be useful, but
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16 // Under Section 7 of GPL version 3, you are granted additional
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18 // 3.1, as published by the Free Software Foundation.
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25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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28 // is hereby granted without fee, provided that the above copyright
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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 namespace __gnu_pbds
45 {
46  /// A sample resize policy.
48  {
49  public:
50  /// Size type.
51  typedef std::size_t size_type;
52 
53  /// Default constructor.
55 
56  /// Copy constructor.
58 
59  /// Swaps content.
60  inline void
61  swap(sample_resize_policy& other);
62 
63  protected:
64  /// Notifies a search started.
65  inline void
67 
68  /// Notifies a search encountered a collision.
69  inline void
71 
72  /// Notifies a search ended.
73  inline void
75 
76  /// Notifies a search started.
77  inline void
79 
80  /// Notifies a search encountered a collision.
81  inline void
83 
84  /// Notifies a search ended.
85  inline void
87 
88  /// Notifies a search started.
89  inline void
91 
92  /// Notifies a search encountered a collision.
93  inline void
95 
96  /// Notifies a search ended.
97  inline void
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;
123  };
124 }
125 #endif