table_all_instr.h

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#ifndef TABLE_ALL_INSTR_H
#define TABLE_ALL_INSTR_H

/**
  @file storage/perfschema/table_all_instr.h
  Abstract tables for all instruments (declarations).
*/

#include "pfs_instr_class.h"
#include "pfs_instr.h"
#include "pfs_engine_table.h"
#include "table_helper.h"

/**
  @addtogroup Performance_schema_tables
  @{
*/

/** Position of a cursor on table_all_instr. */
struct pos_all_instr : public PFS_double_index,
                       public PFS_instrument_view_constants
{
  pos_all_instr()
    : PFS_double_index(FIRST_VIEW, 0)
  {}

  inline void reset(void)
  {
    m_index_1= FIRST_VIEW;
    m_index_2= 0;
  }

  inline bool has_more_view(void)
  { return (m_index_1 <= LAST_VIEW); }

  inline void next_view(void)
  {
    m_index_1++;
    m_index_2= 0;
  }
};

/**
  Abstract table, a union of all instrumentations instances.
  This table is a union of:
  - a view on all mutex instances,
  - a view on all rwlock instances,
  - a view on all cond instances,
  - a view on all file instances,
  - a view on all socket instances
*/
class table_all_instr : public PFS_engine_table
{
public:
  static ha_rows get_row_count();

  virtual int rnd_next();
  virtual int rnd_pos(const void *pos);
  virtual void reset_position(void);

protected:
  table_all_instr(const PFS_engine_table_share *share);

public:
  ~table_all_instr()
  {}

protected:
  /**
    Build a row in the mutex instance view.
    @param pfs                        the mutex instance
  */
  virtual void make_mutex_row(PFS_mutex *pfs)= 0;
  /**
    Build a row in the rwlock instance view.
    @param pfs                        the rwlock instance
  */
  virtual void make_rwlock_row(PFS_rwlock *pfs)= 0;
  /**
    Build a row in the condition instance view.
    @param pfs                        the condition instance
  */
  virtual void make_cond_row(PFS_cond *pfs)= 0;
  /**
    Build a row in the file instance view.
    @param pfs                        the file instance
  */
  virtual void make_file_row(PFS_file *pfs)= 0;
  /**
    Build a row in the socket instance view.
    @param pfs                        the socket instance
  */
  virtual void make_socket_row(PFS_socket *pfs)= 0;

  /** Current position. */
  pos_all_instr m_pos;
  /** Next position. */
  pos_all_instr m_next_pos;
};

/** @} */
#endif