table_mems_by_host_by_event_name.h

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  it under the terms of the GNU General Public License, version 2.0,
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#ifndef TABLE_MEMORY_SUMMARY_BY_HOST_BY_EVENT_NAME_H
#define TABLE_MEMORY_SUMMARY_BY_HOST_BY_EVENT_NAME_H
 
/**
  @file storage/perfschema/table_mems_by_host_by_event_name.h
  Table MEMORY_SUMMARY_BY_HOST_BY_EVENT_NAME (declarations).
*/
 
#include <sys/types.h>
 
#include "my_base.h"
#include "storage/perfschema/pfs_engine_table.h"
#include "storage/perfschema/table_helper.h"
 
class Field;
class Plugin_table;
struct PFS_host;
struct PFS_instr_class;
struct PFS_memory_class;
struct TABLE;
struct THR_LOCK;
 
/**
  @addtogroup performance_schema_tables
  @{
*/
 
class PFS_index_mems_by_host_by_event_name : public PFS_engine_index {
 public:
  PFS_index_mems_by_host_by_event_name()
      : PFS_engine_index(&m_key_1, &m_key_2),
        m_key_1("HOST"),
        m_key_2("EVENT_NAME") {}
 
  ~PFS_index_mems_by_host_by_event_name() override = default;
 
  virtual bool match(PFS_host *pfs);
  virtual bool match(PFS_instr_class *instr_class);
 
 private:
  PFS_key_host m_key_1;
  PFS_key_event_name m_key_2;
};
 
/** A row of PERFORMANCE_SCHEMA.MEMORY_SUMMARY_BY_HOST_BY_EVENT_NAME. */
struct row_mems_by_host_by_event_name {
  /** Column HOST */
  PFS_host_row m_host;
  /** Column EVENT_NAME. */
  PFS_event_name_row m_event_name;
  /** Columns COUNT_ALLOC, ... */
  PFS_memory_stat_row m_stat;
};
 
/**
  Position of a cursor on
  PERFORMANCE_SCHEMA.EVENTS_MEMORY_SUMMARY_BY_HOST_BY_EVENT_NAME.
  Index 1 on host (0 based)
  Index 2 on memory class (1 based)
*/
struct pos_mems_by_host_by_event_name : public PFS_double_index {
  pos_mems_by_host_by_event_name() : PFS_double_index(0, 1) {}
 
  inline void reset() {
    m_index_1 = 0;
    m_index_2 = 1;
  }
 
  inline void next_host() {
    m_index_1++;
    m_index_2 = 1;
  }
 
  inline void next_class() { m_index_2++; }
};
 
/** Table PERFORMANCE_SCHEMA.MEMORY_SUMMARY_BY_HOST_BY_EVENT_NAME. */
class table_mems_by_host_by_event_name : public PFS_engine_table {
 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 rnd_next() override;
  int rnd_pos(const void *pos) override;
 
  int index_init(uint idx, bool sorted) override;
  int index_next() override;
 
 private:
  int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
                      bool read_all) override;
 
  table_mems_by_host_by_event_name();
 
 public:
  ~table_mems_by_host_by_event_name() override = default;
 
 private:
  int make_row(PFS_host *host, PFS_memory_class *klass);
 
  /** Table share lock. */
  static THR_LOCK m_table_lock;
  /** Table definition. */
  static Plugin_table m_table_def;
 
  /** Current row. */
  row_mems_by_host_by_event_name m_row;
  /** Current position. */
  pos_mems_by_host_by_event_name m_pos;
  /** Next position. */
  pos_mems_by_host_by_event_name m_next_pos;
 
  PFS_index_mems_by_host_by_event_name *m_opened_index;
};
 
/** @} */
#endif