/* Copyright (c) 2008, 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, version 2.0,
  as published by the Free Software Foundation.

  This program is also distributed with certain software (including
  but not limited to OpenSSL) that is licensed under separate terms,
  as designated in a particular file or component or in included license
  documentation.  The authors of MySQL hereby grant you an additional
  permission to link the program and your derivative works with the
  separately licensed software that they have included with MySQL.

  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, version 2.0, 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_EVENTS_WAITS_H
#define TABLE_EVENTS_WAITS_H

/**
  @file storage/perfschema/table_events_waits.h
  Table EVENTS_WAITS_xxx (declarations).
*/

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

struct PFS_thread;

/**
  @addtogroup Performance_schema_tables
  @{
*/

/** A row of table_events_waits_common. */
struct row_events_waits
{
  /** Column THREAD_ID. */
  ulonglong m_thread_internal_id;
  /** Column EVENT_ID. */
  ulonglong m_event_id;
  /** Column END_EVENT_ID. */
  ulonglong m_end_event_id;
  /** Column NESTING_EVENT_ID. */
  ulonglong m_nesting_event_id;
  /** Column NESTING_EVENT_TYPE. */
  enum_event_type m_nesting_event_type;
  /** Column EVENT_NAME. */
  const char *m_name;
  /** Length in bytes of @c m_name. */
  uint m_name_length;
  /** Column TIMER_START. */
  ulonglong m_timer_start;
  /** Column TIMER_END. */
  ulonglong m_timer_end;
  /** Column TIMER_WAIT. */
  ulonglong m_timer_wait;
  /** Column OBJECT_TYPE. */
  const char *m_object_type;
  /** Length in bytes of @c m_object_type. */
  uint m_object_type_length;
  /** Column OBJECT_SCHEMA. */
  char m_object_schema[COL_OBJECT_SCHEMA_SIZE];
  /** Length in bytes of @c m_object_schema. */
  uint m_object_schema_length;
  /** Column OBJECT_NAME. */
  char m_object_name[COL_OBJECT_NAME_EXTENDED_SIZE];
  /** Length in bytes of @c m_object_name. */
  uint m_object_name_length;
  /** Column INDEX_NAME. */
  char m_index_name[COL_INDEX_NAME_SIZE];
  /** Length in bytes of @c m_index_name. */
  uint m_index_name_length;
  /** Column OBJECT_INSTANCE_BEGIN. */
  intptr m_object_instance_addr;
  /** Column SOURCE. */
  char m_source[COL_SOURCE_SIZE];
  /** Length in bytes of @c m_source. */
  uint m_source_length;
  /** Column OPERATION. */
  enum_operation_type m_operation;
  /** Column NUMBER_OF_BYTES. */
  ulonglong m_number_of_bytes;
  /** Column FLAGS. */
  uint m_flags;
};

/** Position of a cursor on PERFORMANCE_SCHEMA.EVENTS_WAITS_CURRENT. */
struct pos_events_waits_current : public PFS_double_index
{
  pos_events_waits_current()
    : PFS_double_index(0, 0)
  {}

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

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

/** Position of a cursor on PERFORMANCE_SCHEMA.EVENTS_WAITS_HISTORY. */
struct pos_events_waits_history : public PFS_double_index
{
  pos_events_waits_history()
    : PFS_double_index(0, 0)
  {}

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

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

/**
  Adapter, for table sharing the structure of
  PERFORMANCE_SCHEMA.EVENTS_WAITS_CURRENT.
*/
class table_events_waits_common : public PFS_engine_table
{
protected:
  virtual int read_row_values(TABLE *table,
                              unsigned char *buf,
                              Field **fields,
                              bool read_all);

  table_events_waits_common(const PFS_engine_table_share *share, void *pos);

  ~table_events_waits_common()
  {}

  void clear_object_columns();
  int make_table_object_columns(volatile PFS_events_waits *wait);
  int make_file_object_columns(volatile PFS_events_waits *wait);
  int make_socket_object_columns(volatile PFS_events_waits *wait);

  void make_row(bool thread_own_wait, PFS_thread *pfs_thread,
                volatile PFS_events_waits *wait);

  /** Current row. */
  row_events_waits m_row;
  /** True if the current row exists. */
  bool m_row_exists;
};

/** Table PERFORMANCE_SCHEMA.EVENTS_WAITS_CURRENT. */
class table_events_waits_current : public table_events_waits_common
{
public:
  /** Table share */
  static PFS_engine_table_share m_share;
  static PFS_engine_table* create();
  static int delete_all_rows();

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

protected:
  table_events_waits_current();

public:
  ~table_events_waits_current()
  {}

private:
  friend class table_events_waits_history;
  friend class table_events_waits_history_long;

  /** Table share lock. */
  static THR_LOCK m_table_lock;
  /**
    Fields definition.
    Also used by table_events_waits_history
    and table_events_waits_history_long.
  */
  static TABLE_FIELD_DEF m_field_def;

  /** Current position. */
  pos_events_waits_current m_pos;
  /** Next position. */
  pos_events_waits_current m_next_pos;
};

/** Table PERFORMANCE_SCHEMA.EVENTS_WAITS_HISTORY. */
class table_events_waits_history : public table_events_waits_common
{
public:
  /** Table share */
  static PFS_engine_table_share m_share;
  static PFS_engine_table* create();
  static int delete_all_rows();

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

protected:
  table_events_waits_history();

public:
  ~table_events_waits_history()
  {}

private:
  /** Table share lock. */
  static THR_LOCK m_table_lock;

  /** Current position. */
  pos_events_waits_history m_pos;
  /** Next position. */
  pos_events_waits_history m_next_pos;
};

/** Table PERFORMANCE_SCHEMA.EVENTS_WAITS_HISTORY_LONG. */
class table_events_waits_history_long : public table_events_waits_common
{
public:
  /** Table share */
  static PFS_engine_table_share m_share;
  static PFS_engine_table* create();
  static int delete_all_rows();

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

protected:
  table_events_waits_history_long();

public:
  ~table_events_waits_history_long()
  {}

private:
  /** Table share lock. */
  static THR_LOCK m_table_lock;

  /** Current position. */
  PFS_simple_index m_pos;
  /** Next position. */
  PFS_simple_index m_next_pos;
};

/** @} */
#endif
