lock_method.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:6k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996-2002
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: lock_method.c,v 11.30 2002/03/27 04:32:20 bostic Exp $";
- #endif /* not lint */
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #ifdef HAVE_RPC
- #include <rpc/rpc.h>
- #endif
- #include <string.h>
- #endif
- #include "db_int.h"
- #include "dbinc/db_shash.h"
- #include "dbinc/lock.h"
- #ifdef HAVE_RPC
- #include "dbinc_auto/db_server.h"
- #include "dbinc_auto/rpc_client_ext.h"
- #endif
- static int __lock_set_lk_conflicts __P((DB_ENV *, u_int8_t *, int));
- static int __lock_set_lk_detect __P((DB_ENV *, u_int32_t));
- static int __lock_set_lk_max __P((DB_ENV *, u_int32_t));
- static int __lock_set_lk_max_lockers __P((DB_ENV *, u_int32_t));
- static int __lock_set_lk_max_locks __P((DB_ENV *, u_int32_t));
- static int __lock_set_lk_max_objects __P((DB_ENV *, u_int32_t));
- static int __lock_set_env_timeout __P((DB_ENV *, db_timeout_t, u_int32_t));
- /*
- * __lock_dbenv_create --
- * Lock specific creation of the DB_ENV structure.
- *
- * PUBLIC: void __lock_dbenv_create __P((DB_ENV *));
- */
- void
- __lock_dbenv_create(dbenv)
- DB_ENV *dbenv;
- {
- /*
- * !!!
- * Our caller has not yet had the opportunity to reset the panic
- * state or turn off mutex locking, and so we can neither check
- * the panic state or acquire a mutex in the DB_ENV create path.
- */
- dbenv->lk_max = DB_LOCK_DEFAULT_N;
- dbenv->lk_max_lockers = DB_LOCK_DEFAULT_N;
- dbenv->lk_max_objects = DB_LOCK_DEFAULT_N;
- #ifdef HAVE_RPC
- if (F_ISSET(dbenv, DB_ENV_RPCCLIENT)) {
- dbenv->set_lk_conflicts = __dbcl_set_lk_conflict;
- dbenv->set_lk_detect = __dbcl_set_lk_detect;
- dbenv->set_lk_max = __dbcl_set_lk_max;
- dbenv->set_lk_max_lockers = __dbcl_set_lk_max_lockers;
- dbenv->set_lk_max_locks = __dbcl_set_lk_max_locks;
- dbenv->set_lk_max_objects = __dbcl_set_lk_max_objects;
- dbenv->lock_detect = __dbcl_lock_detect;
- dbenv->lock_dump_region = NULL;
- dbenv->lock_get = __dbcl_lock_get;
- dbenv->lock_id = __dbcl_lock_id;
- dbenv->lock_id_free = __dbcl_lock_id_free;
- dbenv->lock_put = __dbcl_lock_put;
- dbenv->lock_stat = __dbcl_lock_stat;
- dbenv->lock_vec = __dbcl_lock_vec;
- } else
- #endif
- {
- dbenv->set_lk_conflicts = __lock_set_lk_conflicts;
- dbenv->set_lk_detect = __lock_set_lk_detect;
- dbenv->set_lk_max = __lock_set_lk_max;
- dbenv->set_lk_max_lockers = __lock_set_lk_max_lockers;
- dbenv->set_lk_max_locks = __lock_set_lk_max_locks;
- dbenv->set_lk_max_objects = __lock_set_lk_max_objects;
- dbenv->set_timeout = __lock_set_env_timeout;
- dbenv->lock_detect = __lock_detect;
- dbenv->lock_dump_region = __lock_dump_region;
- dbenv->lock_get = __lock_get;
- dbenv->lock_id = __lock_id;
- dbenv->lock_id_free = __lock_id_free;
- #ifdef CONFIG_TEST
- dbenv->lock_id_set = __lock_id_set;
- #endif
- dbenv->lock_put = __lock_put;
- dbenv->lock_stat = __lock_stat;
- dbenv->lock_vec = __lock_vec;
- dbenv->lock_downgrade = __lock_downgrade;
- }
- }
- /*
- * __lock_dbenv_close --
- * Lock specific destruction of the DB_ENV structure.
- *
- * PUBLIC: void __lock_dbenv_close __P((DB_ENV *));
- */
- void
- __lock_dbenv_close(dbenv)
- DB_ENV *dbenv;
- {
- if (dbenv->lk_conflicts != NULL) {
- __os_free(dbenv, dbenv->lk_conflicts);
- dbenv->lk_conflicts = NULL;
- }
- }
- /*
- * __lock_set_lk_conflicts
- * Set the conflicts matrix.
- */
- static int
- __lock_set_lk_conflicts(dbenv, lk_conflicts, lk_modes)
- DB_ENV *dbenv;
- u_int8_t *lk_conflicts;
- int lk_modes;
- {
- int ret;
- ENV_ILLEGAL_AFTER_OPEN(dbenv, "set_lk_conflicts");
- if (dbenv->lk_conflicts != NULL) {
- __os_free(dbenv, dbenv->lk_conflicts);
- dbenv->lk_conflicts = NULL;
- }
- if ((ret = __os_malloc(dbenv,
- lk_modes * lk_modes, &dbenv->lk_conflicts)) != 0)
- return (ret);
- memcpy(dbenv->lk_conflicts, lk_conflicts, lk_modes * lk_modes);
- dbenv->lk_modes = lk_modes;
- return (0);
- }
- /*
- * __lock_set_lk_detect
- * Set the automatic deadlock detection.
- */
- static int
- __lock_set_lk_detect(dbenv, lk_detect)
- DB_ENV *dbenv;
- u_int32_t lk_detect;
- {
- ENV_ILLEGAL_AFTER_OPEN(dbenv, "set_lk_detect");
- switch (lk_detect) {
- case DB_LOCK_DEFAULT:
- case DB_LOCK_EXPIRE:
- case DB_LOCK_MAXLOCKS:
- case DB_LOCK_MINLOCKS:
- case DB_LOCK_MINWRITE:
- case DB_LOCK_OLDEST:
- case DB_LOCK_RANDOM:
- case DB_LOCK_YOUNGEST:
- break;
- default:
- __db_err(dbenv,
- "DB_ENV->set_lk_detect: unknown deadlock detection mode specified");
- return (EINVAL);
- }
- dbenv->lk_detect = lk_detect;
- return (0);
- }
- /*
- * __lock_set_lk_max
- * Set the lock table size.
- */
- static int
- __lock_set_lk_max(dbenv, lk_max)
- DB_ENV *dbenv;
- u_int32_t lk_max;
- {
- ENV_ILLEGAL_AFTER_OPEN(dbenv, "set_lk_max");
- dbenv->lk_max = lk_max;
- dbenv->lk_max_objects = lk_max;
- dbenv->lk_max_lockers = lk_max;
- return (0);
- }
- /*
- * __lock_set_lk_max_locks
- * Set the lock table size.
- */
- static int
- __lock_set_lk_max_locks(dbenv, lk_max)
- DB_ENV *dbenv;
- u_int32_t lk_max;
- {
- ENV_ILLEGAL_AFTER_OPEN(dbenv, "set_lk_max_locks");
- dbenv->lk_max = lk_max;
- return (0);
- }
- /*
- * __lock_set_lk_max_lockers
- * Set the lock table size.
- */
- static int
- __lock_set_lk_max_lockers(dbenv, lk_max)
- DB_ENV *dbenv;
- u_int32_t lk_max;
- {
- ENV_ILLEGAL_AFTER_OPEN(dbenv, "set_lk_max_lockers");
- dbenv->lk_max_lockers = lk_max;
- return (0);
- }
- /*
- * __lock_set_lk_max_objects
- * Set the lock table size.
- */
- static int
- __lock_set_lk_max_objects(dbenv, lk_max)
- DB_ENV *dbenv;
- u_int32_t lk_max;
- {
- ENV_ILLEGAL_AFTER_OPEN(dbenv, "set_lk_max_objects");
- dbenv->lk_max_objects = lk_max;
- return (0);
- }
- /*
- * __lock_set_env_timeout
- * Set the lock environment timeout.
- */
- static int
- __lock_set_env_timeout(dbenv, timeout, flags)
- DB_ENV *dbenv;
- db_timeout_t timeout;
- u_int32_t flags;
- {
- DB_LOCKREGION *region;
- region = NULL;
- if (F_ISSET(dbenv, DB_ENV_OPEN_CALLED)) {
- if (!LOCKING_ON(dbenv))
- return (__db_env_config(
- dbenv, "set_timeout", DB_INIT_LOCK));
- region = ((DB_LOCKTAB *)dbenv->lk_handle)->reginfo.primary;
- }
- switch (flags) {
- case DB_SET_LOCK_TIMEOUT:
- dbenv->lk_timeout = timeout;
- if (region != NULL)
- region->lk_timeout = timeout;
- break;
- case DB_SET_TXN_TIMEOUT:
- dbenv->tx_timeout = timeout;
- if (region != NULL)
- region->tx_timeout = timeout;
- break;
- default:
- return (__db_ferr(dbenv, "DB_ENV->set_timeout", 0));
- /* NOTREACHED */
- }
- return (0);
- }