/* 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 "portable.h"
#include <stdio.h>
-
#include <ac/string.h>
-#include <ac/socket.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;
DBT key, data;
+ 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;
- /* get exiting value (with write lock) */
- rc = bdb->bi_entries->bdi_db->get( bdb->bi_nextid->bdi_db,
- tid, &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;
+ if (rc == 0) {
+ rc = cursor->c_get(cursor, &key, &data, DB_LAST);
+ cursor->c_close(cursor);
+ }
- } else if( rc != 0 ) {
- return rc;
+ switch(rc) {
+ case DB_NOTFOUND:
+ id = 0;
+ rc = 0;
+ /* FALLTHROUGH */
+ case 0:
+ break;
- } else if ( data.size != sizeof(ID) ) {
- /* size mismatch! */
- return -1;
+ 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_entries->bdi_db->put( bdb->bi_nextid->bdi_db,
- tid, &key, &data, 0 );
+ bdb->bi_lastid = id;
- *out = id;
+done:
return rc;
}