table_performance_timers.h

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#ifndef TABLE_PERFORMANCE_TIMERS_H
#define TABLE_PERFORMANCE_TIMERS_H
 
/**
  @file storage/perfschema/table_performance_timers.h
  Table PERFORMANCE_TIMERS (declarations).
*/
 
#include "my_base.h"
#include "my_rdtsc.h"
#include "storage/perfschema/pfs_column_types.h"
#include "storage/perfschema/pfs_engine_table.h"
 
class Field;
class Plugin_table;
struct TABLE;
struct THR_LOCK;
 
/**
  @addtogroup performance_schema_tables
  @{
*/
 
/** A row of PERFORMANCE_SCHEMA.PERFORMANCE_TIMERS. */
struct row_performance_timers {
  /** Column TIMER_NAME. */
  enum_timer_name m_timer_name;
  /**
    Columns ROUTINE (not displayed), TIMER_OVERHEAD,
    TIMER_FREQUENCY, TIMER_RESOLUTION.
  */
  struct my_timer_unit_info m_info;
};
 
/** Table PERFORMANCE_SCHEMA.PERFORMANCE_TIMERS. */
class table_performance_timers : public PFS_engine_table {
 public:
  /** Table share. */
  static PFS_engine_table_share m_share;
  static PFS_engine_table *create(PFS_engine_table_share *);
  static ha_rows get_row_count();
 
  int rnd_next() override;
  int rnd_pos(const void *pos) override;
  void reset_position() override;
 
 protected:
  int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
                      bool read_all) override;
 
 protected:
  table_performance_timers();
 
 public:
  ~table_performance_timers() override = default;
 
 private:
  /** Table share lock. */
  static THR_LOCK m_table_lock;
  /** Table definition. */
  static Plugin_table m_table_def;
 
  /** Current row. */
  row_performance_timers *m_row;
  /** Current position. */
  PFS_simple_index m_pos;
  /** Next position. */
  PFS_simple_index m_next_pos;
  row_performance_timers m_data[COUNT_TIMER_NAME];
};
 
/** @} */
#endif