table_events_waits.h

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/* Copyright (c) 2008, 2025, 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.
 
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  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
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  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
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  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{0};
  /** Column EVENT_ID. */
  ulonglong m_event_id{0};
  /** Column END_EVENT_ID. */
  ulonglong m_end_event_id{0};
  /** Column NESTING_EVENT_ID. */
  ulonglong m_nesting_event_id{0};
  /** Column NESTING_EVENT_TYPE. */
  enum_event_type m_nesting_event_type;
  /** Column EVENT_NAME. */
  const char *m_name{nullptr};
  /** Length in bytes of @c m_name. */
  uint m_name_length{0};
  /** Column TIMER_START. */
  ulonglong m_timer_start{0};
  /** Column TIMER_END. */
  ulonglong m_timer_end{0};
  /** Column TIMER_WAIT. */
  ulonglong m_timer_wait{0};
  /** Column OBJECT_TYPE. */
  const char *m_object_type{nullptr};
  /** Length in bytes of @c m_object_type. */
  uint m_object_type_length{0};
  /** 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{0};
  /** Column INDEX_NAME. */
  char m_index_name[COL_INDEX_NAME_SIZE];
  /** Length in bytes of @c m_index_name. */
  uint m_index_name_length{0};
  /** 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{0};
  /** Column OPERATION. */
  enum_operation_type m_operation;
  /** Column NUMBER_OF_BYTES. */
  ulonglong m_number_of_bytes{0};
  /** Column FLAGS. */
  uint m_flags{0};
};
 
/** 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