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/*-
* 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);
}
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