/* init.c - initialize bdb backend */
/* $OpenLDAP$ */
/*
- * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
+ * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
#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;
DBT key, data;
- DB_TXN *ltid;
+ DBC *cursor;
DBTzero( &key );
- key.data = (char *) &kid;
- key.size = sizeof( kid );
+ key.flags = DB_DBT_USERMEM;
+ key.data = (char *) &id;
+ key.ulen = sizeof( id );
DBTzero( &data );
- data.data = (char *) &id;
- data.ulen = sizeof( id );
- data.flags = DB_DBT_USERMEM;
+ data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL;
- if( 0 ) {
-retry: if( tid != NULL ) {
- /* nested transaction, abort and return */
- (void) txn_abort( ltid );
- Debug( LDAP_DEBUG_ANY,
- "=> bdb_next_id: aborted!\n",
- 0, 0, 0 );
- return rc;
- }
- rc = txn_abort( ltid );
- if( rc != 0 ) {
- Debug( LDAP_DEBUG_ANY,
- "=> bdb_next_id: txn_abort failed: %s (%d)\n",
- db_strerror(rc), rc, 0 );
- return rc;
- }
- }
+ /* Get a read cursor */
+ rc = bdb->bi_id2entry->bdi_db->cursor( bdb->bi_id2entry->bdi_db,
+ tid, &cursor, 0 );
- rc = txn_begin( bdb->bi_dbenv, tid, <id, 0 );
- if( rc != 0 ) {
- Debug( LDAP_DEBUG_ANY,
- "=> bdb_next_id: txn_begin failed: %s (%d)\n",
- db_strerror(rc), rc, 0 );
- return rc;
+ if (rc == 0) {
+ rc = cursor->c_get(cursor, &key, &data, DB_LAST);
+ cursor->c_close(cursor);
}
- /* get existing value for read/modify/write */
- rc = bdb->bi_nextid->bdi_db->get( bdb->bi_nextid->bdi_db,
- ltid, &key, &data, DB_RMW );
-
switch(rc) {
- case DB_LOCK_DEADLOCK:
- case DB_LOCK_NOTGRANTED:
- goto retry;
-
case DB_NOTFOUND:
id = 0;
- break;
-
+ rc = 0;
+ /* FALLTHROUGH */
case 0:
- if ( data.size != sizeof( id ) ) {
- Debug( LDAP_DEBUG_ANY,
- "=> bdb_next_id: get size mismatch: expected %ld, got %ld\n",
- (long) sizeof( id ), (long) data.size, 0 );
- rc = -1;
- goto done;
- }
break;
default:
Debug( LDAP_DEBUG_ANY,
- "=> bdb_next_id: get failed: %s (%d)\n",
+ "=> bdb_last_id: get failed: %s (%d)\n",
db_strerror(rc), rc, 0 );
goto done;
}
- id++;
- data.size = sizeof( id );
-
- /* put new value */
- rc = bdb->bi_nextid->bdi_db->put( bdb->bi_nextid->bdi_db,
- ltid, &key, &data, 0 );
-
- switch(rc) {
- case DB_LOCK_DEADLOCK:
- case DB_LOCK_NOTGRANTED:
- goto retry;
-
- case 0:
- *out = id;
- rc = txn_commit( ltid, 0 );
-
- if( rc != 0 ) {
- Debug( LDAP_DEBUG_ANY,
- "=> bdb_next_id: commit failed: %s (%d)\n",
- db_strerror(rc), rc, 0 );
- }
- break;
-
- default:
- Debug( LDAP_DEBUG_ANY,
- "=> bdb_next_id: put failed: %s (%d)\n",
- db_strerror(rc), rc, 0 );
-done: (void) txn_abort( ltid );
- }
+ bdb->bi_lastid = id;
+done:
return rc;
}