/* init.c - initialize bdb backend */
/* $OpenLDAP$ */
-/*
- * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2005 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
*/
#include "portable.h"
#include "back-bdb.h"
int bdb_next_id( BackendDB *be, DB_TXN *tid, ID *out )
+{
+ struct bdb_info *bdb = (struct bdb_info *) be->be_private;
+
+ ldap_pvt_thread_mutex_lock( &bdb->bi_lastid_mutex );
+ *out = ++bdb->bi_lastid;
+ ldap_pvt_thread_mutex_unlock( &bdb->bi_lastid_mutex );
+
+ return 0;
+}
+
+int bdb_last_id( BackendDB *be, DB_TXN *tid )
{
struct bdb_info *bdb = (struct bdb_info *) be->be_private;
int rc;
- ID kid = NOID;
- ID id;
+ ID id = 0;
+ unsigned char idbuf[sizeof(ID)];
DBT key, data;
- DB_TXN *ltid;
-
- rc = txn_begin( bdb->bi_dbenv, tid, <id, 0 );
- if( rc != 0 ) {
- return rc;
- }
+ DBC *cursor;
DBTzero( &key );
- key.data = (char *) &kid;
- key.size = sizeof( kid );
+ key.flags = DB_DBT_USERMEM;
+ key.data = (char *) idbuf;
+ key.ulen = sizeof( idbuf );
DBTzero( &data );
- data.data = (char *) &id;
- data.ulen = sizeof( id );
- data.flags = DB_DBT_USERMEM;
+ data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL;
- /* get exiting value (with write lock) */
- rc = bdb->bi_nextid->bdi_db->get( bdb->bi_nextid->bdi_db,
- ltid, &key, &data, DB_RMW );
+ /* Get a read cursor */
+ rc = bdb->bi_id2entry->bdi_db->cursor( bdb->bi_id2entry->bdi_db,
+ tid, &cursor, 0 );
- if( rc == DB_NOTFOUND ) {
- /* must be first add */
- id = NOID;
-
- } else if( rc != 0 ) {
- goto done;
+ if (rc == 0) {
+ rc = cursor->c_get(cursor, &key, &data, DB_LAST);
+ cursor->c_close(cursor);
+ }
- } else if ( data.size != sizeof(ID) ) {
- /* size mismatch! */
- rc = -1;
+ switch(rc) {
+ case DB_NOTFOUND:
+ rc = 0;
+ break;
+ case 0:
+ BDB_DISK2ID( idbuf, &id );
+ break;
+
+ default:
+ Debug( LDAP_DEBUG_ANY,
+ "=> bdb_last_id: get failed: %s (%d)\n",
+ db_strerror(rc), rc, 0 );
goto done;
}
- id++;
-
- /* store new value */
- rc = bdb->bi_nextid->bdi_db->put( bdb->bi_nextid->bdi_db,
- ltid, &key, &data, 0 );
-
- *out = id;
+ bdb->bi_lastid = id;
done:
- if( rc != 0 ) {
- (void) txn_abort( ltid );
- } else {
- rc = txn_commit( ltid, 0 );
- }
-
return rc;
}