table_file_instances.h

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/* Copyright (c) 2008, 2010, 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,
  51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */

#ifndef TABLE_FILE_INSTANCES_H
#define TABLE_FILE_INSTANCES_H

#include "pfs_column_types.h"
#include "pfs_engine_table.h"

struct row_file_instances
{
  const char *m_filename;
  uint m_filename_length;
  const char *m_event_name;
  uint m_event_name_length;
  uint m_open_count;
};

class table_file_instances : public PFS_engine_table
{
public:
  static PFS_engine_table_share m_share;
  static PFS_engine_table* create();

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

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

  table_file_instances();

public:
  ~table_file_instances()
  {}

private:
  void make_row(PFS_file *pfs);

  static THR_LOCK m_table_lock;
  static TABLE_FIELD_DEF m_field_def;

  row_file_instances m_row;
  bool m_row_exists;
  PFS_simple_index m_pos;
  PFS_simple_index m_next_pos;
};

#endif