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
|
#ifndef _EVENT_QUEUE_H_
#define _EVENT_QUEUE_H_
/* Copyright (C) 2004-2006 MySQL AB
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; either version 2 of the License, or
(at your option) any later version.
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, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
class sp_name;
class Event_timed;
class Event_db_repository;
class THD;
typedef bool * (*event_timed_identifier_comparator)(Event_timed*, Event_timed*);
class Event_scheduler;
class Event_queue
{
public:
Event_queue();
static void
init_mutexes();
static void
destroy_mutexes();
bool
init(Event_db_repository *db_repo);
void
deinit();
/* Methods for queue management follow */
int
create_event(THD *thd, Event_parse_data *et, bool check_existence);
int
update_event(THD *thd, Event_parse_data *et, LEX_STRING *new_schema,
LEX_STRING *new_name);
bool
drop_event(THD *thd, sp_name *name);
int
drop_schema_events(THD *thd, LEX_STRING schema);
int
drop_user_events(THD *thd, LEX_STRING *definer)
{ DBUG_ASSERT(0); return 0;}
uint
events_count();
uint
events_count_no_lock();
static bool
check_system_tables(THD *thd);
void
recalculate_queue(THD *thd);
void
empty_queue();
///////////////protected
Event_timed *
find_event(LEX_STRING db, LEX_STRING name, bool remove_from_q);
int
load_events_from_db(THD *thd);
void
drop_matching_events(THD *thd, LEX_STRING pattern,
bool (*)(Event_timed *,LEX_STRING *));
/* LOCK_event_queue is the mutex which protects the access to the queue. */
pthread_mutex_t LOCK_event_queue;
Event_db_repository *db_repository;
/* The MEM_ROOT of the object */
MEM_ROOT scheduler_root;
/* The sorted queue with the Event_timed objects */
QUEUE queue;
uint mutex_last_locked_at_line;
uint mutex_last_unlocked_at_line;
const char* mutex_last_locked_in_func;
const char* mutex_last_unlocked_in_func;
bool mutex_queue_data_locked;
/* helper functions for working with mutexes & conditionals */
void
lock_data(const char *func, uint line);
void
unlock_data(const char *func, uint line);
static void
on_queue_change();
protected:
/* Singleton instance */
static Event_scheduler *singleton;
};
#endif /* _EVENT_QUEUE_H_ */
|
