table_all_instr.h

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/* Copyright (c) 2008, 2022, Oracle and/or its affiliates.
 
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  it under the terms of the GNU General Public License, version 2.0,
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  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef TABLE_ALL_INSTR_H
#define TABLE_ALL_INSTR_H
 
/**
  @file storage/perfschema/table_all_instr.h
  Abstract tables for all instruments (declarations).
*/
 
#include <sys/types.h>
 
#include "my_compiler.h"
#include "storage/perfschema/pfs_engine_table.h"
#include "storage/perfschema/pfs_instr.h"
#include "storage/perfschema/pfs_instr_class.h"
#include "storage/perfschema/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;
  }
};
 
class PFS_index_all_instr : public PFS_engine_index {
 public:
  explicit PFS_index_all_instr(PFS_engine_key *key_1)
      : PFS_engine_index(key_1) {}
 
  ~PFS_index_all_instr() override = default;
 
  virtual bool match(PFS_mutex *) { return false; }
  virtual bool match(PFS_rwlock *) { return false; }
  virtual bool match(PFS_cond *) { return false; }
  virtual bool match(PFS_file *) { return false; }
  virtual bool match(PFS_socket *) { return false; }
  /* All views match by default. */
  virtual bool match_view(uint view [[maybe_unused]]) { return true; }
};
 
/**
  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();
 
  int index_init(uint, bool) override { return 0; }
  int rnd_next() override;
  int rnd_pos(const void *pos) override;
  void reset_position(void) override;
  int index_next(void) override;
 
 protected:
  explicit table_all_instr(const PFS_engine_table_share *share);
 
 public:
  ~table_all_instr() override = default;
 
 protected:
  /**
    Build a row in the mutex instance view.
    @param pfs                        the mutex instance
  */
  virtual int make_mutex_row(PFS_mutex *pfs) = 0;
  /**
    Build a row in the rwlock instance view.
    @param pfs                        the rwlock instance
  */
  virtual int make_rwlock_row(PFS_rwlock *pfs) = 0;
  /**
    Build a row in the condition instance view.
    @param pfs                        the condition instance
  */
  virtual int make_cond_row(PFS_cond *pfs) = 0;
  /**
    Build a row in the file instance view.
    @param pfs                        the file instance
  */
  virtual int make_file_row(PFS_file *pfs) = 0;
  /**
    Build a row in the socket instance view.
    @param pfs                        the socket instance
  */
  virtual int make_socket_row(PFS_socket *pfs) = 0;
 
  /** Current position. */
  pos_all_instr m_pos;
  /** Next position. */
  pos_all_instr m_next_pos;
 
  PFS_index_all_instr *m_opened_index;
};
 
/** @} */
#endif