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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2000,2007 Oracle. All rights reserved.
*
* $Id: db_cds.c,v 12.10 2007/07/17 07:29:04 mjc Exp $
*/
#include "db_config.h"
#include "db_int.h"
#include "dbinc/db_page.h"
#include "dbinc/db_am.h"
#include "dbinc/lock.h"
#include "dbinc/txn.h"
static int __cdsgroup_abort __P((DB_TXN *txn));
static int __cdsgroup_commit __P((DB_TXN *txn, u_int32_t flags));
static int __cdsgroup_discard __P((DB_TXN *txn, u_int32_t flags));
static u_int32_t __cdsgroup_id __P((DB_TXN *txn));
static int __cdsgroup_notsup __P((DB_ENV *dbenv, const char *meth));
static int __cdsgroup_prepare __P((DB_TXN *txn, u_int8_t *gid));
static int __cdsgroup_set_name __P((DB_TXN *txn, const char *name));
static int __cdsgroup_set_timeout
__P((DB_TXN *txn, db_timeout_t timeout, u_int32_t flags));
/*
* __cdsgroup_notsup --
* Error when CDS groups don't support a method.
*/
static int
__cdsgroup_notsup(dbenv, meth)
DB_ENV *dbenv;
const char *meth;
{
__db_errx(dbenv, "CDS groups do not support %s", meth);
return (DB_OPNOTSUP);
}
static int __cdsgroup_abort(txn)
DB_TXN *txn;
{
return (__cdsgroup_notsup(txn->mgrp->dbenv, "abort"));
}
static int __cdsgroup_commit(txn, flags)
DB_TXN *txn;
u_int32_t flags;
{
DB_ENV *dbenv;
DB_LOCKREQ lreq;
DB_LOCKER *locker;
int ret, t_ret;
COMPQUIET(flags, 0);
dbenv = txn->mgrp->dbenv;
/* Check for live cursors. */
if (txn->cursors != 0) {
__db_errx(dbenv, "CDS group has active cursors");
return (EINVAL);
}
/* We may be holding handle locks; release them. */
lreq.op = DB_LOCK_PUT_ALL;
lreq.obj = NULL;
ret = __lock_vec(dbenv, txn->locker, 0, &lreq, 1, NULL);
dbenv = txn->mgrp->dbenv;
locker = txn->locker;
__os_free(dbenv, txn->mgrp);
__os_free(dbenv, txn);
if ((t_ret = __lock_id_free(dbenv, locker)) != 0 && ret == 0)
ret = t_ret;
return (ret);
}
static int __cdsgroup_discard(txn, flags)
DB_TXN *txn;
u_int32_t flags;
{
COMPQUIET(flags, 0);
return (__cdsgroup_notsup(txn->mgrp->dbenv, "discard"));
}
static u_int32_t __cdsgroup_id(txn)
DB_TXN *txn;
{
return (txn->txnid);
}
static int __cdsgroup_prepare(txn, gid)
DB_TXN *txn;
u_int8_t *gid;
{
COMPQUIET(gid, NULL);
return (__cdsgroup_notsup(txn->mgrp->dbenv, "prepare"));
}
static int __cdsgroup_set_name(txn, name)
DB_TXN *txn;
const char *name;
{
COMPQUIET(name, NULL);
return (__cdsgroup_notsup(txn->mgrp->dbenv, "set_name"));
}
static int __cdsgroup_set_timeout(txn, timeout, flags)
DB_TXN *txn;
db_timeout_t timeout;
u_int32_t flags;
{
COMPQUIET(timeout, 0);
COMPQUIET(flags, 0);
return (__cdsgroup_notsup(txn->mgrp->dbenv, "set_timeout"));
}
/*
* __cds_txn_begin --
* DB_ENV->cdsgroup_begin
*
* PUBLIC: int __cdsgroup_begin __P((DB_ENV *, DB_TXN **));
*/
int
__cdsgroup_begin(dbenv, txnpp)
DB_ENV *dbenv;
DB_TXN **txnpp;
{
DB_THREAD_INFO *ip;
DB_TXN *txn;
int ret;
PANIC_CHECK(dbenv);
ENV_ILLEGAL_BEFORE_OPEN(dbenv, "cdsgroup_begin");
if (!CDB_LOCKING(dbenv))
return (__db_env_config(dbenv, "cdsgroup_begin", DB_INIT_CDB));
ENV_ENTER(dbenv, ip);
*txnpp = txn = NULL;
if ((ret = __os_calloc(dbenv, 1, sizeof(DB_TXN), &txn)) != 0)
goto err;
/*
* We need a dummy DB_TXNMGR -- it's the only way to get from a
* transaction handle to the environment handle.
*/
if ((ret = __os_calloc(dbenv, 1, sizeof(DB_TXNMGR), &txn->mgrp)) != 0)
goto err;
txn->mgrp->dbenv = dbenv;
if ((ret = __lock_id(dbenv, &txn->txnid, &txn->locker)) != 0)
goto err;
txn->flags = TXN_CDSGROUP;
txn->abort = __cdsgroup_abort;
txn->commit = __cdsgroup_commit;
txn->discard = __cdsgroup_discard;
txn->id = __cdsgroup_id;
txn->prepare = __cdsgroup_prepare;
txn->set_name = __cdsgroup_set_name;
txn->set_timeout = __cdsgroup_set_timeout;
*txnpp = txn;
if (0) {
err: if (txn != NULL) {
if (txn->mgrp != NULL)
__os_free(dbenv, txn->mgrp);
__os_free(dbenv, txn);
}
}
ENV_LEAVE(dbenv, ip);
return (ret);
}
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