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// -*- 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