lock_method.c
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:3k
- /*-
- * See the file LICENSE for redistribution information.
- *
- * Copyright (c) 1996, 1997, 1998, 1999, 2000
- * Sleepycat Software. All rights reserved.
- */
- #include "db_config.h"
- #ifndef lint
- static const char revid[] = "$Id: lock_method.c,v 11.5 2000/12/21 19:16:42 bostic Exp $";
- #endif /* not lint */
- #ifndef NO_SYSTEM_INCLUDES
- #include <sys/types.h>
- #include <string.h>
- #endif
- #include "db_int.h"
- #include "db_shash.h"
- #include "lock.h"
- /*
- * __lock_set_lk_conflicts
- * Set the conflicts matrix.
- *
- * PUBLIC: int __lock_set_lk_conflicts __P((DB_ENV *, u_int8_t *, int));
- */
- 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->lk_conflicts,
- dbenv->lk_modes * dbenv->lk_modes);
- dbenv->lk_conflicts = NULL;
- }
- if ((ret = __os_malloc(dbenv,
- lk_modes * lk_modes, NULL, &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.
- *
- * PUBLIC: int __lock_set_lk_detect __P((DB_ENV *, u_int32_t));
- */
- 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_OLDEST:
- case DB_LOCK_RANDOM:
- case DB_LOCK_YOUNGEST:
- break;
- default:
- return (EINVAL);
- }
- dbenv->lk_detect = lk_detect;
- return (0);
- }
- /*
- * __lock_set_lk_max
- * Set the lock table size.
- *
- * PUBLIC: int __lock_set_lk_max __P((DB_ENV *, u_int32_t));
- */
- 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.
- *
- * PUBLIC: int __lock_set_lk_max_locks __P((DB_ENV *, u_int32_t));
- */
- 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.
- *
- * PUBLIC: int __lock_set_lk_max_lockers __P((DB_ENV *, u_int32_t));
- */
- 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.
- *
- * PUBLIC: int __lock_set_lk_max_objects __P((DB_ENV *, u_int32_t));
- */
- 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);
- }