TileCache.h

/*
 * #%L
 * OME-FILES C++ library for image IO.
 * Copyright © 2006 - 2015 Open Microscopy Environment:
 *   - Massachusetts Institute of Technology
 *   - National Institutes of Health
 *   - University of Dundee
 *   - Board of Regents of the University of Wisconsin-Madison
 *   - Glencoe Software, Inc.
 * %%
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 */

#ifndef OME_FILES_TILECACHE_H
#define OME_FILES_TILECACHE_H

#include <ome/files/Types.h>
#include <ome/files/TileBuffer.h>

#include <map>
#include <memory>

namespace ome
{
  namespace files
  {

    class TileCache
    {
    public:
      typedef dimension_size_type key_type;
      typedef std::shared_ptr<TileBuffer> value_type;

      TileCache();

      virtual ~TileCache();

    private:
      // To avoid unintentional and expensive copies, copying and
      // assignment of caches is prevented.

      TileCache (const TileCache&);

      TileCache&
      operator= (const TileCache&);

    public:
      bool
      insert(key_type   tileindex,
             value_type tilebuffer);

      void
      erase(key_type tileindex);

      value_type
      find(key_type tileindex);

      const value_type
      find(key_type tileindex) const;

      dimension_size_type
      size() const;

      void
      clear();

      value_type&
      operator[](key_type tileindex);

    private:
      std::map<key_type, value_type> cache;
    };

  }
}

#endif // OME_FILES_TILECACHE_H

/*
 * Local Variables:
 * mode:C++
 * End:
 */