1 /* Copyright (c) 2008, 2021, Oracle and/or its affiliates.
2 
3   This program is free software; you can redistribute it and/or modify
4   it under the terms of the GNU General Public License, version 2.0,
5   as published by the Free Software Foundation.
6 
7   This program is also distributed with certain software (including
8   but not limited to OpenSSL) that is licensed under separate terms,
9   as designated in a particular file or component or in included license
10   documentation.  The authors of MySQL hereby grant you an additional
11   permission to link the program and your derivative works with the
12   separately licensed software that they have included with MySQL.
13 
14   This program is distributed in the hope that it will be useful,
15   but WITHOUT ANY WARRANTY; without even the implied warranty of
16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17   GNU General Public License, version 2.0, for more details.
18 
19   You should have received a copy of the GNU General Public License
20   along with this program; if not, write to the Free Software Foundation,
21   51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
22 
23 #ifndef TABLE_ALL_INSTR_H
24 #define TABLE_ALL_INSTR_H
25 
26 /**
27   @file storage/perfschema/table_all_instr.h
28   Abstract tables for all instruments (declarations).
29 */
30 
31 #include "pfs_instr_class.h"
32 #include "pfs_instr.h"
33 #include "pfs_engine_table.h"
34 #include "table_helper.h"
35 
36 /**
37   @addtogroup Performance_schema_tables
38   @{
39 */
40 
41 /** Position of a cursor on table_all_instr. */
42 struct pos_all_instr : public PFS_double_index,
43                        public PFS_instrument_view_constants
44 {
pos_all_instrpos_all_instr45   pos_all_instr()
46     : PFS_double_index(FIRST_VIEW, 0)
47   {}
48 
resetpos_all_instr49   inline void reset(void)
50   {
51     m_index_1= FIRST_VIEW;
52     m_index_2= 0;
53   }
54 
has_more_viewpos_all_instr55   inline bool has_more_view(void)
56   { return (m_index_1 <= LAST_VIEW); }
57 
next_viewpos_all_instr58   inline void next_view(void)
59   {
60     m_index_1++;
61     m_index_2= 0;
62   }
63 };
64 
65 /**
66   Abstract table, a union of all instrumentations instances.
67   This table is a union of:
68   - a view on all mutex instances,
69   - a view on all rwlock instances,
70   - a view on all cond instances,
71   - a view on all file instances,
72   - a view on all socket instances
73 */
74 class table_all_instr : public PFS_engine_table
75 {
76 public:
77   static ha_rows get_row_count();
78 
79   virtual int rnd_next();
80   virtual int rnd_pos(const void *pos);
81   virtual void reset_position(void);
82 
83 protected:
84   table_all_instr(const PFS_engine_table_share *share);
85 
86 public:
~table_all_instr()87   ~table_all_instr()
88   {}
89 
90 protected:
91   /**
92     Build a row in the mutex instance view.
93     @param pfs                        the mutex instance
94   */
95   virtual void make_mutex_row(PFS_mutex *pfs)= 0;
96   /**
97     Build a row in the rwlock instance view.
98     @param pfs                        the rwlock instance
99   */
100   virtual void make_rwlock_row(PFS_rwlock *pfs)= 0;
101   /**
102     Build a row in the condition instance view.
103     @param pfs                        the condition instance
104   */
105   virtual void make_cond_row(PFS_cond *pfs)= 0;
106   /**
107     Build a row in the file instance view.
108     @param pfs                        the file instance
109   */
110   virtual void make_file_row(PFS_file *pfs)= 0;
111   /**
112     Build a row in the socket instance view.
113     @param pfs                        the socket instance
114   */
115   virtual void make_socket_row(PFS_socket *pfs)= 0;
116 
117   /** Current position. */
118   pos_all_instr m_pos;
119   /** Next position. */
120   pos_all_instr m_next_pos;
121 };
122 
123 /** @} */
124 #endif
125