forked from MariaDB/server
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathevent_queue.h
More file actions
135 lines (98 loc) · 3.28 KB
/
event_queue.h
File metadata and controls
135 lines (98 loc) · 3.28 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
#ifndef _EVENT_QUEUE_H_
#define _EVENT_QUEUE_H_
/* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
/**
@addtogroup Event_Scheduler
@{
@file event_queue.h
Queue of events awaiting execution.
*/
#ifdef HAVE_PSI_INTERFACE
extern PSI_mutex_key key_LOCK_event_queue;
extern PSI_cond_key key_COND_queue_state;
#endif /* HAVE_PSI_INTERFACE */
#include "queues.h" // QUEUE
#include "sql_string.h" /* LEX_STRING */
#include "my_time.h" /* my_time_t, interval_type */
class Event_basic;
class Event_queue_element;
class Event_queue_element_for_exec;
class THD;
/**
Queue of active events awaiting execution.
*/
class Event_queue
{
public:
Event_queue();
~Event_queue();
bool
init_queue(THD *thd);
/* Methods for queue management follow */
bool
create_event(THD *thd, Event_queue_element *new_element,
bool *created);
void
update_event(THD *thd, LEX_STRING dbname, LEX_STRING name,
Event_queue_element *new_element);
void
drop_event(THD *thd, LEX_STRING dbname, LEX_STRING name);
void
drop_schema_events(THD *thd, LEX_STRING schema);
void
recalculate_activation_times(THD *thd);
bool
get_top_for_execution_if_time(THD *thd,
Event_queue_element_for_exec **event_name);
void
dump_internal_status();
private:
void
empty_queue();
void
deinit_queue();
/* helper functions for working with mutexes & conditionals */
void
lock_data(const char *func, uint line);
void
unlock_data(const char *func, uint line);
void
cond_wait(THD *thd, struct timespec *abstime, const PSI_stage_info *stage,
const char *src_func, const char *src_file, uint src_line);
void
find_n_remove_event(LEX_STRING db, LEX_STRING name);
void
drop_matching_events(THD *thd, LEX_STRING pattern,
bool (*)(LEX_STRING, Event_basic *));
void
dbug_dump_queue(my_time_t now);
/* LOCK_event_queue is the mutex which protects the access to the queue. */
mysql_mutex_t LOCK_event_queue;
mysql_cond_t COND_queue_state;
/* The sorted queue with the Event_queue_element objects */
QUEUE queue;
my_time_t next_activation_at;
uint mutex_last_locked_at_line;
uint mutex_last_unlocked_at_line;
uint mutex_last_attempted_lock_at_line;
const char* mutex_last_locked_in_func;
const char* mutex_last_unlocked_in_func;
const char* mutex_last_attempted_lock_in_func;
bool mutex_queue_data_locked;
bool mutex_queue_data_attempting_lock;
bool waiting_on_cond;
};
/**
@} (End of group Event_Scheduler)
*/
#endif /* _EVENT_QUEUE_H_ */