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ultra_embe |
// -*- C++ -*-
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// Copyright (C) 2005, 2006, 2009, 2010 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the terms
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// of the GNU General Public License as published by the Free Software
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// Foundation; either version 3, or (at your option) any later
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// version.
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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// Permission to use, copy, modify, sell, and distribute this software
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// is hereby granted without fee, provided that the above copyright
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// notice appears in all copies, and that both that copyright notice
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// and this permission notice appear in supporting documentation. None
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// of the above authors, nor IBM Haifa Research Laboratories, make any
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// representation about the suitability of this software for any
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// purpose. It is provided "as is" without express or implied
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// warranty.
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/**
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* @file sample_resize_policy.hpp
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* Contains a sample resize policy for hash tables.
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*/
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#ifndef PB_DS_SAMPLE_RESIZE_POLICY_HPP
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#define PB_DS_SAMPLE_RESIZE_POLICY_HPP
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namespace __gnu_pbds
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{
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/// A sample resize policy.
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class sample_resize_policy
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{
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public:
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/// Size type.
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typedef std::size_t size_type;
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/// Default constructor.
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sample_resize_policy();
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/// Copy constructor.
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sample_range_hashing(const sample_resize_policy& other);
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/// Swaps content.
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inline void
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swap(sample_resize_policy& other);
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protected:
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/// Notifies a search started.
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inline void
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notify_insert_search_start();
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/// Notifies a search encountered a collision.
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inline void
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notify_insert_search_collision();
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/// Notifies a search ended.
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inline void
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notify_insert_search_end();
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/// Notifies a search started.
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inline void
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notify_find_search_start();
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/// Notifies a search encountered a collision.
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inline void
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notify_find_search_collision();
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/// Notifies a search ended.
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inline void
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notify_find_search_end();
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/// Notifies a search started.
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inline void
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notify_erase_search_start();
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/// Notifies a search encountered a collision.
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inline void
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notify_erase_search_collision();
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/// Notifies a search ended.
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inline void
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notify_erase_search_end();
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/// Notifies an element was inserted.
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inline void
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notify_inserted(size_type num_e);
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/// Notifies an element was erased.
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inline void
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notify_erased(size_type num_e);
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/// Notifies the table was cleared.
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void
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notify_cleared();
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/// Notifies the table was resized to new_size.
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void
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notify_resized(size_type new_size);
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/// Queries whether a resize is needed.
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inline bool
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is_resize_needed() const;
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/// Queries what the new size should be.
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size_type
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get_new_size(size_type size, size_type num_used_e) const;
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};
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}
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#endif
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