mirror of
https://github.com/MariaDB/server.git
synced 2025-01-17 20:42:30 +01:00
915cebdd53
tablockman: fixed a bug in finding a blocker lock mysys/my_getsystime.c: this is no longer true storage/maria/lockman.h: post-review fixes storage/maria/tablockman.h: post-review fixes storage/maria/unittest/lockman-t.c: post-review fixes storage/maria/unittest/lockman1-t.c: post-review fixes storage/maria/unittest/lockman2-t.c: post-review fixes include/my_atomic.h: moved intptr definition to my_global.h storage/maria/tablockman.c: post-review fixes BUILD/SETUP.sh: add -DMY_LF_EXTRA_DEBUG to debug builds include/atomic/nolock.h: suppress warning include/my_global.h: suppress warning mysys/lf_alloc-pin.c: post-review fixes mysys/lf_dynarray.c: post-review fixes mysys/lf_hash.c: post-review fixes storage/maria/trnman.c: suppress warning include/lf.h: post-review fix
88 lines
3.3 KiB
C
88 lines
3.3 KiB
C
/* Copyright (C) 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 */
|
|
|
|
#ifndef _tablockman_h
|
|
#define _tablockman_h
|
|
|
|
/*
|
|
Lock levels:
|
|
^^^^^^^^^^^
|
|
|
|
N - "no lock", not a lock, used sometimes internally to simplify the code
|
|
S - Shared
|
|
X - eXclusive
|
|
IS - Intention Shared
|
|
IX - Intention eXclusive
|
|
SIX - Shared + Intention eXclusive
|
|
LS - Loose Shared
|
|
LX - Loose eXclusive
|
|
SLX - Shared + Loose eXclusive
|
|
LSIX - Loose Shared + Intention eXclusive
|
|
*/
|
|
#ifndef _lockman_h
|
|
#warning TODO remove N-locks
|
|
enum lock_type { N, S, X, IS, IX, SIX, LS, LX, SLX, LSIX, LOCK_TYPE_LAST };
|
|
enum lockman_getlock_result {
|
|
NO_MEMORY_FOR_LOCK=1, DEADLOCK, LOCK_TIMEOUT,
|
|
GOT_THE_LOCK,
|
|
GOT_THE_LOCK_NEED_TO_LOCK_A_SUBRESOURCE,
|
|
GOT_THE_LOCK_NEED_TO_INSTANT_LOCK_A_SUBRESOURCE
|
|
};
|
|
#endif
|
|
|
|
#define LOCK_TYPES (LOCK_TYPE_LAST-1)
|
|
|
|
typedef struct st_table_lock TABLE_LOCK;
|
|
|
|
typedef struct st_table_lock_owner {
|
|
TABLE_LOCK *active_locks; /* list of active locks */
|
|
TABLE_LOCK *waiting_lock; /* waiting lock (one lock only) */
|
|
struct st_table_lock_owner *waiting_for; /* transaction we're waiting for */
|
|
pthread_cond_t *cond; /* transactions waiting for us, wait on 'cond' */
|
|
pthread_mutex_t *mutex; /* mutex is required to use 'cond' */
|
|
uint16 loid, waiting_for_loid; /* Lock Owner IDentifier */
|
|
} TABLE_LOCK_OWNER;
|
|
|
|
typedef struct st_locked_table {
|
|
pthread_mutex_t mutex; /* mutex for everything below */
|
|
HASH latest_locks; /* latest locks in a hash */
|
|
TABLE_LOCK *active_locks[LOCK_TYPES]; /* dl-list of locks per type */
|
|
TABLE_LOCK *wait_queue_in, *wait_queue_out; /* wait deque (double-end queue)*/
|
|
} LOCKED_TABLE;
|
|
|
|
typedef TABLE_LOCK_OWNER *loid_to_tlo_func(uint16);
|
|
|
|
typedef struct {
|
|
pthread_mutex_t pool_mutex;
|
|
TABLE_LOCK *pool; /* lifo pool of free locks */
|
|
uint lock_timeout; /* lock timeout in milliseconds */
|
|
loid_to_tlo_func *loid_to_tlo; /* for mapping loid to TABLE_LOCK_OWNER */
|
|
} TABLOCKMAN;
|
|
|
|
void tablockman_init(TABLOCKMAN *, loid_to_tlo_func *, uint);
|
|
void tablockman_destroy(TABLOCKMAN *);
|
|
enum lockman_getlock_result tablockman_getlock(TABLOCKMAN *, TABLE_LOCK_OWNER *,
|
|
LOCKED_TABLE *, enum lock_type);
|
|
void tablockman_release_locks(TABLOCKMAN *, TABLE_LOCK_OWNER *);
|
|
void tablockman_init_locked_table(LOCKED_TABLE *, int);
|
|
void tablockman_destroy_locked_table(LOCKED_TABLE *);
|
|
|
|
#ifdef EXTRA_DEBUG
|
|
void tablockman_print_tlo(TABLE_LOCK_OWNER *);
|
|
#endif
|
|
|
|
#endif
|
|
|