summaryrefslogtreecommitdiff
path: root/lib/tdb_compat/tdb_compat.h
diff options
context:
space:
mode:
Diffstat (limited to 'lib/tdb_compat/tdb_compat.h')
-rw-r--r--lib/tdb_compat/tdb_compat.h136
1 files changed, 136 insertions, 0 deletions
diff --git a/lib/tdb_compat/tdb_compat.h b/lib/tdb_compat/tdb_compat.h
new file mode 100644
index 0000000000..ea401cba49
--- /dev/null
+++ b/lib/tdb_compat/tdb_compat.h
@@ -0,0 +1,136 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Compatibility layer for TDB1 vs TDB2.
+
+ Copyright (C) Rusty Russell 2011
+
+ ** NOTE! The following LGPL license applies to the tdb_compat
+ ** library. This does NOT imply that all of Samba is released
+ ** under the LGPL
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 3 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef TDB_COMPAT_H
+#define TDB_COMPAT_H
+
+#include "replace.h"
+#include <ccan/typesafe_cb/typesafe_cb.h>
+#if BUILD_TDB2
+#include <tdb2.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+extern TDB_DATA tdb_null;
+
+/* Old-style tdb_fetch. */
+static inline TDB_DATA tdb_fetch_compat(struct tdb_context *tdb, TDB_DATA k)
+{
+ TDB_DATA dbuf;
+ if (tdb_fetch(tdb, k, &dbuf) != TDB_SUCCESS) {
+ return tdb_null;
+ }
+ return dbuf;
+}
+
+static inline TDB_DATA tdb_firstkey_compat(struct tdb_context *tdb)
+{
+ TDB_DATA k;
+ if (tdb_firstkey(tdb, &k) != TDB_SUCCESS) {
+ return tdb_null;
+ }
+ return k;
+}
+
+/* Note: this frees the old key.dptr. */
+static inline TDB_DATA tdb_nextkey_compat(struct tdb_context *tdb, TDB_DATA k)
+{
+ if (tdb_nextkey(tdb, &k) != TDB_SUCCESS) {
+ return tdb_null;
+ }
+ return k;
+}
+
+/* tdb_traverse_read and tdb_traverse are equal: both only take read locks. */
+#define tdb_traverse_read tdb_traverse
+
+/* Old-style tdb_errorstr */
+#define tdb_errorstr_compat(tdb) tdb_errorstr(tdb_error(tdb))
+
+/* This typedef doesn't exist in TDB2. */
+typedef struct tdb_context TDB_CONTEXT;
+
+/* We don't need these any more. */
+#define tdb_reopen_all(flag) 0
+#define tdb_reopen(tdb) 0
+
+/* These no longer exist in tdb2. */
+#define TDB_CLEAR_IF_FIRST 1048576
+#define TDB_INCOMPATIBLE_HASH 0
+#define TDB_VOLATILE 0
+
+/* tdb2 does nonblocking functions via attibutes. */
+enum TDB_ERROR tdb_transaction_start_nonblock(struct tdb_context *tdb);
+
+/* Convenient (typesafe) wrapper for tdb open with logging */
+#define tdb_open_compat(name, hsize, tdb_fl, open_fl, mode, log_fn, log_data) \
+ tdb_open_compat_((name), (hsize), (tdb_fl), (open_fl), (mode), \
+ typesafe_cb_preargs(void, void *, \
+ (log_fn), (log_data), \
+ struct tdb_context *, \
+ enum tdb_log_level, \
+ const char *), \
+ (log_data))
+
+struct tdb_context *
+tdb_open_compat_(const char *name, int hash_size_unused,
+ int tdb_flags, int open_flags, mode_t mode,
+ void (*log_fn)(struct tdb_context *,
+ enum tdb_log_level,
+ const char *message,
+ void *data),
+ void *log_data);
+#else
+#include <tdb.h>
+
+/* FIXME: Inlining this is a bit lazy, but eases S3 build. */
+static inline struct tdb_context *
+tdb_open_compat(const char *name, int hash_size,
+ int tdb_flags, int open_flags, mode_t mode,
+ tdb_log_func log_fn, void *log_private)
+{
+ struct tdb_logging_context lctx;
+ lctx.log_fn = log_fn;
+ lctx.log_private = log_private;
+
+ if (log_fn)
+ return tdb_open_ex(name, hash_size, tdb_flags, open_flags,
+ mode, &lctx, NULL);
+ else
+ return tdb_open(name, hash_size, tdb_flags, open_flags, mode);
+}
+
+#define tdb_firstkey_compat tdb_firstkey
+/* Note: this frees the old key.dptr. */
+static inline TDB_DATA tdb_nextkey_compat(struct tdb_context *tdb, TDB_DATA k)
+{
+ TDB_DATA next = tdb_nextkey(tdb, k);
+ free(k.dptr);
+ return next;
+}
+#define tdb_errorstr_compat(tdb) tdb_errorstr(tdb)
+#define tdb_fetch_compat tdb_fetch
+#endif
+
+#endif /* TDB_COMPAT_H */