1 files changed, 88 insertions, 0 deletions
diff --git a/servers/slapd/back-wt/nextid.c b/servers/slapd/back-wt/nextid.c
new file mode 100644
index 0000000..99620e9
--- /dev/null
+++ b/servers/slapd/back-wt/nextid.c
@@ -0,0 +1,88 @@
+/* OpenLDAP WiredTiger backend */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2002-2022 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>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was developed by HAMANO Tsukasa <hamano@osstech.co.jp>
+ * based on back-bdb for inclusion in OpenLDAP Software.
+ * WiredTiger is a product of MongoDB Inc.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/string.h>
+#include "back-wt.h"
+#include "slap-config.h"
+
+int wt_next_id(BackendDB *be, ID *out){
+    struct wt_info *wi = (struct wt_info *) be->be_private;
+	*out = __sync_add_and_fetch(&wi->wi_lastid, 1);
+	return 0;
+}
+
+int wt_last_id( BackendDB *be, WT_SESSION *session, ID *out )
+{
+    WT_CURSOR *cursor;
+    int rc;
+    uint64_t id;
+
+    rc = session->open_cursor(session, WT_TABLE_ID2ENTRY, NULL, NULL, &cursor);
+    if(rc){
+		Debug( LDAP_DEBUG_ANY,
+			   "wt_last_id: open_cursor failed: %s (%d)\n",
+			   wiredtiger_strerror(rc), rc );
+		return rc;
+    }
+
+    rc = cursor->prev(cursor);
+	switch(rc) {
+	case 0:
+		rc = cursor->get_key(cursor, &id);
+		if ( rc ) {
+			Debug( LDAP_DEBUG_ANY,
+				   "wt_last_id: get_key failed: %s (%d)\n",
+				   wiredtiger_strerror(rc), rc );
+			return rc;
+		}
+		*out = id;
+		break;
+	case WT_NOTFOUND:
+        /* no entry */
+        *out = 0;
+		break;
+	default:
+		Debug( LDAP_DEBUG_ANY,
+			   "wt_last_id: prev failed: %s (%d)\n",
+			   wiredtiger_strerror(rc), rc );
+    }
+
+    rc = cursor->close(cursor);
+    if ( rc ) {
+		Debug( LDAP_DEBUG_ANY,
+			   "wt_last_id: close failed: %s (%d)\n",
+			   wiredtiger_strerror(rc), rc );
+		return rc;
+    }
+
+    return 0;
+}
+
+/*
+ * Local variables:
+ * indent-tabs-mode: t
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ */