PseudoTables.h

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/*
 * Copyright (C) 2007-2015 Hypertable, Inc.
 *
 * This file is part of Hypertable.
 *
 * Hypertable 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; version 3 of the
 * License, or any later version.
 *
 * Hypertable 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#ifndef Hypertable_Lib_PseudoTables_h
#define Hypertable_Lib_PseudoTables_h

#include "Schema.h"

#include <mutex>

namespace Hypertable {

  class PseudoTables {

  public:

    enum ColumnFamilyCode {
      CELLSTORE_INDEX_SIZE = 1,
      CELLSTORE_INDEX_COMPRESSED_SIZE = 2,
      CELLSTORE_INDEX_KEY_COUNT = 3
    };

    static PseudoTables *instance() {
      std::lock_guard<std::mutex> lock(ms_mutex);

      if (!ms_instance)
        ms_instance = new PseudoTables();

      return ms_instance;
    }

    static void destroy() {
      std::lock_guard<std::mutex> lock(ms_mutex);
      if (ms_instance) {
        delete ms_instance;
        ms_instance = 0;
      }
    }

    Schema *cellstore_index;  

  private:

    PseudoTables();

    ~PseudoTables();

    static PseudoTables *ms_instance;

    static std::mutex ms_mutex;
  };

}

#endif // Hypertable_Lib_PseudoTables_h