table_events_waits.h

Go to the documentation of this file.

/* Copyright (c) 2008, 2024, Oracle and/or its affiliates.
 
  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 designed to work 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 either included with
  the program or referenced in the documentation.
 
  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, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef TABLE_EVENTS_WAITS_H
#define TABLE_EVENTS_WAITS_H
 
/**
  @file storage/perfschema/table_events_waits.h
  Table EVENTS_WAITS_xxx (declarations).
*/
 
#include <sys/types.h>
 
#include "my_base.h"
#include "my_inttypes.h"
#include "storage/perfschema/pfs_column_types.h"
#include "storage/perfschema/pfs_engine_table.h"
#include "storage/perfschema/table_helper.h"
 
class Field;
class Plugin_table;
struct PFS_events_waits;
struct PFS_thread;
struct TABLE;
struct THR_LOCK;
 
/**
  @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. */
  PFS_schema_name m_object_schema;
  /** 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() {
    m_index_1 = 0;
    m_index_2 = 0;
  }
 
  inline void next_thread() {
    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() {
    m_index_1 = 0;
    m_index_2 = 0;
  }
 
  inline void next_thread() {
    m_index_1++;
    m_index_2 = 0;
  }
};
 
class PFS_index_events_waits : public PFS_engine_index {
 public:
  PFS_index_events_waits()
      : PFS_engine_index(&m_key_1, &m_key_2),
        m_key_1("THREAD_ID"),
        m_key_2("EVENT_ID") {}
 
  ~PFS_index_events_waits() override = default;
 
  bool match(PFS_thread *pfs);
  bool match(PFS_events_waits *pfs);
 
 private:
  PFS_key_thread_id m_key_1;
  PFS_key_event_id m_key_2;
};
 
/**
  Adapter, for table sharing the structure of
  PERFORMANCE_SCHEMA.EVENTS_WAITS_CURRENT.
*/
class table_events_waits_common : public PFS_engine_table {
 protected:
  int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
                      bool read_all) override;
 
  table_events_waits_common(const PFS_engine_table_share *share, void *pos);
 
  ~table_events_waits_common() override = default;
 
  void clear_object_columns();
  int make_table_object_columns(PFS_events_waits *wait);
  int make_file_object_columns(PFS_events_waits *wait);
  int make_socket_object_columns(PFS_events_waits *wait);
  int make_metadata_lock_object_columns(PFS_events_waits *wait);
 
  int make_row(PFS_events_waits *wait);
 
  /** Current row. */
  row_events_waits m_row;
};
 
/** 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(PFS_engine_table_share *);
  static int delete_all_rows();
  static ha_rows get_row_count();
 
  int index_init(uint idx, bool sorted) override;
 
  int rnd_next() override;
  int rnd_pos(const void *pos) override;
  int index_next() override;
  void reset_position() override;
 
 protected:
  table_events_waits_current();
 
 public:
  ~table_events_waits_current() override = default;
 
 private:
  friend class table_events_waits_history;
  friend class table_events_waits_history_long;
 
  /** Table share lock. */
  static THR_LOCK m_table_lock;
  /** Table definition. */
  static Plugin_table m_table_def;
 
  PFS_events_waits *get_wait(PFS_thread *pfs_thread, uint index_2);
  int make_row(PFS_thread *thread, PFS_events_waits *wait);
 
  /** Current position. */
  pos_events_waits_current m_pos;
  /** Next position. */
  pos_events_waits_current m_next_pos;
 
  PFS_index_events_waits *m_opened_index;
};
 
/** 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(PFS_engine_table_share *);
  static int delete_all_rows();
  static ha_rows get_row_count();
 
  void reset_position() override;
 
  int index_init(uint idx, bool sorted) override;
  int index_next() override;
 
  int rnd_next() override;
  int rnd_pos(const void *pos) override;
 
 protected:
  table_events_waits_history();
 
 public:
  ~table_events_waits_history() override = default;
 
 private:
  /** Table share lock. */
  static THR_LOCK m_table_lock;
  /** Table definition. */
  static Plugin_table m_table_def;
 
  PFS_events_waits *get_wait(PFS_thread *pfs_thread, uint index_2);
  int make_row(PFS_thread *thread, PFS_events_waits *wait);
 
  /** Current position. */
  pos_events_waits_history m_pos;
  /** Next position. */
  pos_events_waits_history m_next_pos;
 
  PFS_index_events_waits *m_opened_index;
};
 
/** 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(PFS_engine_table_share *);
  static int delete_all_rows();
  static ha_rows get_row_count();
 
  int rnd_next() override;
  int rnd_pos(const void *pos) override;
  void reset_position() override;
 
 protected:
  table_events_waits_history_long();
 
 public:
  ~table_events_waits_history_long() override = default;
 
 private:
  /** Table share lock. */
  static THR_LOCK m_table_lock;
  /** Table definition. */
  static Plugin_table m_table_def;
 
  /** Current position. */
  PFS_simple_index m_pos;
  /** Next position. */
  PFS_simple_index m_next_pos;
};
 
/** @} */
#endif