File: threadpool.h

package info (click to toggle)
mariadb-10.0 10.0.25-0%2Bdeb8u1
  • links: PTS, VCS
  • area: main
  • in suites: jessie
  • size: 466,160 kB
  • ctags: 182,424
  • sloc: cpp: 1,376,579; ansic: 826,548; perl: 59,653; sh: 36,635; pascal: 32,260; yacc: 14,915; xml: 5,210; sql: 4,660; cs: 4,647; makefile: 4,555; ruby: 4,465; python: 2,282; lex: 1,427; asm: 295; awk: 54; php: 22; sed: 16
file content (71 lines) | stat: -rw-r--r-- 2,504 bytes parent folder | download | duplicates (3)
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
/* Copyright (C) 2012 Monty Program 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; 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, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#define MAX_THREAD_GROUPS 100000

/* Threadpool parameters */
extern uint threadpool_min_threads;  /* Minimum threads in pool */
extern uint threadpool_idle_timeout; /* Shutdown idle worker threads  after this timeout */
extern uint threadpool_size; /* Number of parallel executing threads */
extern uint threadpool_max_size;
extern uint threadpool_stall_limit;  /* time interval in 10 ms units for stall checks*/
extern uint threadpool_max_threads;  /* Maximum threads in pool */
extern uint threadpool_oversubscribe;  /* Maximum active threads in group */



/* Common thread pool routines, suitable for different implementations */
extern void threadpool_cleanup_connection(THD *thd);
extern void threadpool_remove_connection(THD *thd);
extern int  threadpool_process_request(THD *thd);
extern int  threadpool_add_connection(THD *thd);

/*
  Functions used by scheduler. 
  OS-specific implementations are in
  threadpool_unix.cc or threadpool_win.cc
*/
extern bool tp_init();
extern void tp_add_connection(THD*);
extern void tp_wait_begin(THD *, int);
extern void tp_wait_end(THD*);
extern void tp_post_kill_notification(THD *thd);
extern void tp_end(void);

/* Used in SHOW for threadpool_idle_thread_count */
extern int  tp_get_idle_thread_count();

/*
  Threadpool statistics
*/
struct TP_STATISTICS
{
  /* Current number of worker thread. */
  volatile int32 num_worker_threads;
};

extern TP_STATISTICS tp_stats;


/* Functions to set threadpool parameters */
extern void tp_set_min_threads(uint val);
extern void tp_set_max_threads(uint val);
extern void tp_set_threadpool_size(uint val);
extern void tp_set_threadpool_stall_limit(uint val);

/* Activate threadpool scheduler */
extern void tp_scheduler(void);

extern int show_threadpool_idle_threads(THD *thd, SHOW_VAR *var, char *buff);