MySQL  8.0.17
Source Code Documentation
lock.h
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22 
23 #ifndef LOCK_INCLUDED
24 #define LOCK_INCLUDED
25 
26 #include <stddef.h>
27 #include <sys/types.h>
28 #include <string>
29 
30 #include "map_helpers.h"
31 #include "sql/mdl.h"
32 
33 class THD;
34 // Forward declarations
35 struct TABLE;
36 struct THR_LOCK_DATA;
37 
38 struct MYSQL_LOCK {
42 };
43 
44 MYSQL_LOCK *mysql_lock_tables(THD *thd, TABLE **table, size_t count,
45  uint flags);
46 void mysql_unlock_tables(THD *thd, MYSQL_LOCK *sql_lock);
47 void mysql_unlock_read_tables(THD *thd, MYSQL_LOCK *sql_lock);
48 void mysql_unlock_some_tables(THD *thd, TABLE **table, uint count);
49 void mysql_lock_remove(THD *thd, MYSQL_LOCK *locked, TABLE *table);
50 void mysql_lock_abort_for_thread(THD *thd, TABLE *table);
52 /* Lock based on name */
53 bool lock_schema_name(THD *thd, const char *db);
54 
55 // Hash set to hold set of tablespace names.
57 
58 // Lock tablespace names.
59 bool lock_tablespace_names(THD *thd, Tablespace_hash_set *tablespace_set,
60  ulong lock_wait_timeout);
61 
62 /* Lock based on stored routine name */
64  const char *db, const char *name);
65 
66 /* Acquire protection against the global read lock. */
67 bool acquire_shared_global_read_lock(THD *thd, unsigned long lock_wait_timeout);
68 
69 #endif /* LOCK_INCLUDED */
void mysql_unlock_tables(THD *thd, MYSQL_LOCK *sql_lock)
Definition: lock.cc:406
Definition: thr_lock.h:123
uint table_count
Definition: lock.h:40
ssize_t count
Definition: memcached.c:386
const string name("\ame\)
bool lock_tablespace_names(THD *thd, Tablespace_hash_set *tablespace_set, ulong lock_wait_timeout)
Acquire IX MDL lock each tablespace name from the given set.
Definition: lock.cc:779
MYSQL_LOCK * mysql_lock_merge(MYSQL_LOCK *a, MYSQL_LOCK *b)
Definition: lock.cc:566
void mysql_lock_remove(THD *thd, MYSQL_LOCK *locked, TABLE *table)
Try to find the table in the list of locked tables.
Definition: lock.cc:490
bool lock_schema_name(THD *thd, const char *db)
Obtain an exclusive metadata lock on a schema name.
Definition: lock.cc:738
Definition: table.h:1294
THR_LOCK_DATA ** locks
Definition: lock.h:41
uint lock_count
Definition: lock.h:40
malloc_unordered_set< std::string > Tablespace_hash_set
Definition: lock.h:56
bool acquire_shared_global_read_lock(THD *thd, unsigned long lock_wait_timeout)
Acquire protection against the global read lock.
Definition: lock.cc:986
unsigned int uint
Definition: uca-dump.cc:29
void mysql_unlock_read_tables(THD *thd, MYSQL_LOCK *sql_lock)
unlock all tables locked for read.
Definition: lock.cc:432
void mysql_unlock_some_tables(THD *thd, TABLE **table, uint count)
Unlock some of the tables locked by mysql_lock_tables.
Definition: lock.cc:422
bool lock_object_name(THD *thd, MDL_key::enum_mdl_namespace mdl_type, const char *db, const char *name)
Obtain an exclusive metadata lock on an object name.
Definition: lock.cc:831
void mysql_lock_abort_for_thread(THD *thd, TABLE *table)
Abort one thread / table combination.
Definition: lock.cc:552
enum_mdl_namespace
Object namespaces.
Definition: mdl.h:383
std::unordered_set, but with my_malloc, so that you can track the memory used using PSI memory keys...
Definition: map_helpers.h:196
static int flags[50]
Definition: hp_test1.cc:39
Definition: lock.h:38
unsigned long ulong
Definition: my_inttypes.h:48
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_class.h:777
MYSQL_LOCK * mysql_lock_tables(THD *thd, TABLE **table, size_t count, uint flags)
Lock tables.
Definition: lock.cc:316
TABLE ** table
Definition: lock.h:39