MySQL 8.4.3
Source Code Documentation
locking_service.h
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23
24#ifndef LOCKING_SERVICE_INCLUDED
25#define LOCKING_SERVICE_INCLUDED
26
27#include <stddef.h>
28
29#include "my_systime.h" // Timout_type
30#include "mysql/service_locking.h" // enum_locking_service_lock_type
31class THD;
32
33/**
34 Acquire locking service locks.
35
36 @param opaque_thd Thread handle. If NULL, current_thd will be used.
37 @param lock_namespace Namespace of the locks to acquire.
38 @param lock_names Array of names of the locks to acquire.
39 @param lock_num Number of elements in 'lock_names'.
40 @param lock_type Lock type to acquire. LOCKING_SERVICE_READ or _WRITE.
41 @param lock_timeout Number of seconds to wait before giving up.
42
43 @retval 1 Acquisition failed, error has been reported.
44 @retval 0 Acquisition successful, all locks acquired.
45
46 @note both lock_namespace and lock_names are limited to 64 characters max.
47 Names are compared using binary comparison.
48*/
50 const char *lock_namespace,
51 const char **lock_names, size_t lock_num,
52 enum enum_locking_service_lock_type lock_type,
53 Timeout_type lock_timeout);
54
55/**
56 Release all lock service locks taken by the given connection
57 in the given namespace.
58
59 @param opaque_thd Thread handle. If NULL, current_thd will be used.
60 @param lock_namespace Namespace of the locks to release.
61
62 @retval 1 Release failed, error has been reported.
63 @retval 0 Release successful, all locks acquired.
64*/
66 const char *lock_namespace);
67
68/**
69 Release all locking service locks taken by the given connection
70 in all namespaces.
71
72 @param thd Thread handle.
73*/
75
76#endif /* LOCKING_SERVICE_INCLUDED */
#define MYSQL_THD
Definition: backup_page_tracker.h:38
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_lexer_thd.h:36
void release_all_locking_service_locks(THD *thd)
Release all locking service locks taken by the given connection in all namespaces.
Definition: locking_service.cc:167
int acquire_locking_service_locks(MYSQL_THD opaque_thd, const char *lock_namespace, const char **lock_names, size_t lock_num, enum enum_locking_service_lock_type lock_type, Timeout_type lock_timeout)
Acquire locking service locks.
Definition: locking_service.cc:110
int release_locking_service_locks(MYSQL_THD opaque_thd, const char *lock_namespace)
Release all lock service locks taken by the given connection in the given namespace.
Definition: locking_service.cc:150
Defines for getting and processing the current system type programmatically.
std::uint64_t Timeout_type
Type alias to reduce chance of conversion errors on timeout values.
Definition: my_systime.h:125
Implements mysql_locking_service_st.
enum_locking_service_lock_type
Types of locking service locks.
Definition: service_locking.h:52