--- /dev/null
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010
+// Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the terms
+// of the GNU General Public License as published by the Free Software
+// Foundation; either version 3, or (at your option) any later
+// version.
+
+// This library is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file sample_resize_trigger.hpp
+ * Contains a sample resize trigger policy class.
+ */
+
+#ifndef PB_DS_SAMPLE_RESIZE_TRIGGER_HPP
+#define PB_DS_SAMPLE_RESIZE_TRIGGER_HPP
+
+namespace __gnu_pbds
+{
+ /// A sample resize trigger policy.
+ class sample_resize_trigger
+ {
+ public:
+ /// Size type.
+ typedef std::size_t size_type;
+
+ /// Default constructor.
+ sample_resize_trigger();
+
+ /// Copy constructor.
+ sample_range_hashing(const sample_resize_trigger&);
+
+ /// Swaps content.
+ inline void
+ swap(sample_resize_trigger&);
+
+ protected:
+ /// Notifies a search started.
+ inline void
+ notify_insert_search_start();
+
+ /// Notifies a search encountered a collision.
+ inline void
+ notify_insert_search_collision();
+
+ /// Notifies a search ended.
+ inline void
+ notify_insert_search_end();
+
+ /// Notifies a search started.
+ inline void
+ notify_find_search_start();
+
+ /// Notifies a search encountered a collision.
+ inline void
+ notify_find_search_collision();
+
+ /// Notifies a search ended.
+ inline void
+ notify_find_search_end();
+
+ /// Notifies a search started.
+ inline void
+ notify_erase_search_start();
+
+ /// Notifies a search encountered a collision.
+ inline void
+ notify_erase_search_collision();
+
+ /// Notifies a search ended.
+ inline void
+ notify_erase_search_end();
+
+ /// Notifies an element was inserted. the total number of entries in
+ /// the table is num_entries.
+ inline void
+ notify_inserted(size_type num_entries);
+
+ /// Notifies an element was erased.
+ inline void
+ notify_erased(size_type num_entries);
+
+ /// Notifies the table was cleared.
+ void
+ notify_cleared();
+
+ /// Notifies the table was resized as a result of this object's
+ /// signifying that a resize is needed.
+ void
+ notify_resized(size_type new_size);
+
+ /// Notifies the table was resized externally.
+ void
+ notify_externally_resized(size_type new_size);
+
+ /// Queries whether a resize is needed.
+ inline bool
+ is_resize_needed() const;
+
+ /// Queries whether a grow is needed.
+ inline bool
+ is_grow_needed(size_type size, size_type num_entries) const;
+
+ private:
+ /// Resizes to new_size.
+ virtual void
+ do_resize(size_type);
+ };
+}
+#endif