MySQL  8.0.27
Source Code Documentation
rpl_tblmap.h
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22 
23 #ifndef TABLE_MAPPING_H
24 #define TABLE_MAPPING_H
25 
26 #include <sys/types.h>
27 
28 #include "map_helpers.h"
29 #include "my_alloc.h"
30 #include "my_inttypes.h"
31 
32 /* Forward declarations */
33 #ifdef MYSQL_SERVER
34 struct TABLE;
35 
37 #else
39 
41 #endif
42 
43 /**
44  Maps table id's (integers) to table pointers.
45 
46  In mysqlbinlog, "table pointer" means Table_map_log_event*.
47 
48  In the server, "table pointer" means TABLE*.
49 */
51  private:
53 
54  public:
55  enum enum_error {
59  };
60 
61  table_mapping();
63 
64  Mapped_table *get_table(ulonglong table_id);
65 
66  int set_table(ulonglong table_id, Mapped_table *table);
67  int remove_table(ulonglong table_id);
68  void clear_tables();
69  ulong count() const { return static_cast<ulong>(m_table_ids.size()); }
70 
71  private:
72  struct entry {
74  union {
77  };
78  };
79 
80  int expand();
81 
82  /*
83  Head of the list of free entries; "free" in the sense that it's an
84  allocated entry free for use, NOT in the sense that it's freed
85  memory.
86  */
88 
89  /*
90  Map from table ids (numbers) to Mapped_table objects.
91 
92  No destructor for entries passed here, as the entries are allocated in a
93  MEM_ROOT (freed as a whole in the destructor), they cannot be freed one by
94  one.
95  */
97 };
98 
99 #endif
Table_map_log_event which maps a table definition to a number.
Definition: log_event.h:2389
std::unordered_map, but with my_malloc, so that you can track the memory used using PSI memory keys.
Definition: map_helpers.h:147
Maps table id's (integers) to table pointers.
Definition: rpl_tblmap.h:50
void clear_tables()
Definition: rpl_tblmap.cc:142
entry * m_free
Definition: rpl_tblmap.h:87
table_mapping()
Definition: rpl_tblmap.cc:56
ulong count() const
Definition: rpl_tblmap.h:69
~table_mapping()
Definition: rpl_tblmap.cc:61
enum_error
Definition: rpl_tblmap.h:55
@ ERR_NO_ERROR
Definition: rpl_tblmap.h:56
@ ERR_MEMORY_ALLOCATION
Definition: rpl_tblmap.h:58
@ ERR_LIMIT_EXCEEDED
Definition: rpl_tblmap.h:57
int remove_table(ulonglong table_id)
Definition: rpl_tblmap.cc:126
int set_table(ulonglong table_id, Mapped_table *table)
Definition: rpl_tblmap.cc:99
malloc_unordered_map< ulonglong, entry * > m_table_ids
Definition: rpl_tblmap.h:96
int expand()
Definition: rpl_tblmap.cc:87
MEM_ROOT m_mem_root
Definition: rpl_tblmap.h:52
Mapped_table * get_table(ulonglong table_id)
Definition: rpl_tblmap.cc:67
This file follows Google coding style, except for the name MEM_ROOT (which is kept for historical rea...
Some integer typedefs for easier portability.
unsigned long long int ulonglong
Definition: my_inttypes.h:55
TABLE Mapped_table
Definition: rpl_tblmap.h:34
The MEM_ROOT is a simple arena, where allocations are carved out of larger blocks.
Definition: my_alloc.h:78
Definition: table.h:1394
Definition: rpl_tblmap.h:72
Mapped_table * table
Definition: rpl_tblmap.h:75
entry * next
Definition: rpl_tblmap.h:76
ulonglong table_id
Definition: rpl_tblmap.h:73