openldap/servers/slapd/back-bdb/nextid.c

76 lines
1.4 KiB
C

/* init.c - initialize bdb backend */
/* $OpenLDAP$ */
/*
* 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 "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 id = 0;
DBT key, data;
DBC *cursor;
DBTzero( &key );
key.flags = DB_DBT_USERMEM;
key.data = (char *) &id;
key.ulen = sizeof( id );
DBTzero( &data );
data.flags = DB_DBT_USERMEM | DB_DBT_PARTIAL;
/* Get a read cursor */
rc = bdb->bi_id2entry->bdi_db->cursor( bdb->bi_id2entry->bdi_db,
tid, &cursor, 0 );
if (rc == 0) {
rc = cursor->c_get(cursor, &key, &data, DB_LAST);
cursor->c_close(cursor);
}
switch(rc) {
case DB_NOTFOUND:
id = 0;
rc = 0;
/* FALLTHROUGH */
case 0:
break;
default:
#ifdef NEW_LOGGING
LDAP_LOG ( INDEX, ERR, "bdb_last_id: get failed: %s (%d)\n",
db_strerror(rc), rc, 0 );
#else
Debug( LDAP_DEBUG_ANY,
"=> bdb_last_id: get failed: %s (%d)\n",
db_strerror(rc), rc, 0 );
#endif
goto done;
}
bdb->bi_lastid = id;
done:
return rc;
}