table_hosts.h

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#ifndef TABLE_HOSTS_H
#define TABLE_HOSTS_H
 
/**
  @file storage/perfschema/table_hosts.h
  TABLE HOSTS.
*/
 
#include <sys/types.h>
 
#include "storage/perfschema/cursor_by_host.h"
#include "storage/perfschema/pfs_column_types.h"
#include "storage/perfschema/table_helper.h"
 
struct PFS_host;
 
/**
  @addtogroup performance_schema_tables
  @{
*/
 
class PFS_index_hosts_by_host : public PFS_index_hosts {
 public:
  PFS_index_hosts_by_host() : PFS_index_hosts(&m_key), m_key("HOST") {}
 
  ~PFS_index_hosts_by_host() override = default;
 
  bool match(PFS_host *pfs) override;
 
 private:
  PFS_key_host m_key;
};
 
/**
  A row of PERFORMANCE_SCHEMA.HOSTS.
*/
struct row_hosts {
  /** Column HOST. */
  PFS_host_row m_host;
  /** Columns CURRENT_CONNECTIONS, TOTAL_CONNECTIONS. */
  PFS_connection_stat_row m_connection_stat;
};
 
/** Table PERFORMANCE_SCHEMA.HOSTS. */
class table_hosts : public cursor_by_host {
 public:
  /** Table share */
  static PFS_engine_table_share m_share;
  /** Table builder */
  static PFS_engine_table *create(PFS_engine_table_share *);
  static int delete_all_rows();
 
 protected:
  int read_row_values(TABLE *table, unsigned char *buf, Field **fields,
                      bool read_all) override;
 
 protected:
  table_hosts();
 
 public:
  ~table_hosts() override = default;
 
  int index_init(uint idx, bool sorted) override;
 
 private:
  int make_row(PFS_host *pfs) override;
 
  /** Table share lock. */
  static THR_LOCK m_table_lock;
  /** Table definition. */
  static Plugin_table m_table_def;
 
  /** Current row. */
  row_hosts m_row;
};
 
/** @} */
#endif