table_tiws_by_index_usage.h

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/* Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.

  This program 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 2 of the License.

  This program 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 St, Fifth Floor, Boston, MA 02110-1301  USA */

#ifndef TABLE_IO_WAIT_SUMMARY_BY_INDEX_USAGE_H
#define TABLE_IO_WAIT_SUMMARY_BY_INDEX_USAGE_H

#include "pfs_column_types.h"
#include "pfs_engine_table.h"
#include "pfs_instr_class.h"
#include "pfs_instr.h"
#include "table_helper.h"

struct row_tiws_by_index_usage
{
  PFS_index_row m_index;
  PFS_table_io_stat_row m_stat;
};

struct pos_tiws_by_index_usage : public PFS_double_index
{
  pos_tiws_by_index_usage()
    : PFS_double_index(0, 0)
  {}

  inline void reset(void)
  {
    m_index_1= 0;
    m_index_2= 0;
  }

  inline bool has_more_table(void)
  {
    return (m_index_1 < table_share_max);
  }

  inline void next_table(void)
  {
    m_index_1++;
    m_index_2= 0;
  }
};

class table_tiws_by_index_usage : public PFS_engine_table
{
public:
  static PFS_engine_table_share m_share;
  static PFS_engine_table* create();
  static int delete_all_rows();

  virtual int rnd_init(bool scan);
  virtual int rnd_next();
  virtual int rnd_pos(const void *pos);
  virtual void reset_position(void);

protected:
  virtual int read_row_values(TABLE *table,
                              unsigned char *buf,
                              Field **fields,
                              bool read_all);

  table_tiws_by_index_usage();

public:
  ~table_tiws_by_index_usage()
  {}

protected:
  void make_row(PFS_table_share *table_share, uint index);

private:
  static THR_LOCK m_table_lock;
  static TABLE_FIELD_DEF m_field_def;

  row_tiws_by_index_usage m_row;
  bool m_row_exists;
  pos_tiws_by_index_usage m_pos;
  pos_tiws_by_index_usage m_next_pos;
};

#endif