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https://git.openldap.org/openldap/openldap.git
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97 lines
1.6 KiB
C
97 lines
1.6 KiB
C
/* init.c - initialize bdb backend */
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/* $OpenLDAP$ */
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/*
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* Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/string.h>
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#include "back-bdb.h"
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int bdb_next_id( BackendDB *be, DB_TXN *tid, ID *out )
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{
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struct bdb_info *bdb = (struct bdb_info *) be->be_private;
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int rc;
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ID kid = NOID;
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ID id;
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DBT key, data;
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DB_TXN *ltid;
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DBTzero( &key );
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key.data = (char *) &kid;
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key.size = sizeof( kid );
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DBTzero( &data );
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data.data = (char *) &id;
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data.ulen = sizeof( id );
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data.flags = DB_DBT_USERMEM;
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if( 0 ) {
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retry: if( tid != NULL ) {
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/* nested transaction, abort and return */
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(void) txn_abort( ltid );
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return rc;
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}
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rc = txn_abort( ltid );
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if( rc != 0 ) {
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return rc;
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}
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}
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rc = txn_begin( bdb->bi_dbenv, tid, <id, 0 );
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if( rc != 0 ) {
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return rc;
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}
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/* get existing value for read/modify/write */
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rc = bdb->bi_nextid->bdi_db->get( bdb->bi_nextid->bdi_db,
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ltid, &key, &data, DB_RMW );
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switch(rc) {
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case DB_LOCK_DEADLOCK:
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case DB_LOCK_NOTGRANTED:
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goto retry;
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case DB_NOTFOUND:
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id = NOID;
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break;
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case 0:
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if ( data.size != sizeof(ID) ) {
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/* size mismatch! */
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rc = -1;
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goto done;
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}
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break;
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default:
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goto done;
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}
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id++;
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/* put new value */
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rc = bdb->bi_nextid->bdi_db->put( bdb->bi_nextid->bdi_db,
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ltid, &key, &data, 0 );
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switch(rc) {
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case DB_LOCK_DEADLOCK:
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case DB_LOCK_NOTGRANTED:
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goto retry;
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case 0:
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*out = id;
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rc = txn_commit( ltid, 0 );
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break;
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default:
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done: (void) txn_abort( ltid );
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}
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return rc;
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}
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