tdb2: implement tdb_exists and tdb_parse_record

[ccan] / ccan / tdb2 / traverse.c

diff --git a/ccan/tdb2/traverse.c b/ccan/tdb2/traverse.c
index 5217f63b80b9b68a463c0f85174f59b362ba0070..71a889e5de472a76cae1f1e7769e343f53d36ea7 100644 (file)
--- a/ccan/tdb2/traverse.c
+++ b/ccan/tdb2/traverse.c
@@ -18,7 +18,10 @@
 #include "private.h"
 #include <ccan/likely/likely.h>
 
-int64_t tdb_traverse(struct tdb_context *tdb, tdb_traverse_func fn, void *p)
+int64_t tdb_traverse_(struct tdb_context *tdb,
+                     int (*fn)(struct tdb_context *,
+                               TDB_DATA, TDB_DATA, void *),
+                     void *p)
 {
        enum TDB_ERROR ecode;
        struct traverse_info tinfo;
@@ -68,3 +71,27 @@ enum TDB_ERROR tdb_nextkey(struct tdb_context *tdb, struct tdb_data *key)
 
        return next_in_hash(tdb, &tinfo, key, NULL);
 }
+
+static int wipe_one(struct tdb_context *tdb,
+                   TDB_DATA key, TDB_DATA data, enum TDB_ERROR *ecode)
+{
+       *ecode = tdb_delete(tdb, key);
+       return (*ecode != TDB_SUCCESS);
+}
+
+enum TDB_ERROR tdb_wipe_all(struct tdb_context *tdb)
+{
+       enum TDB_ERROR ecode;
+       int64_t count;
+
+       ecode = tdb_allrecord_lock(tdb, F_WRLCK, TDB_LOCK_WAIT, false);
+       if (ecode != TDB_SUCCESS)
+               return ecode;
+
+       /* FIXME: Be smarter. */
+       count = tdb_traverse(tdb, wipe_one, &ecode);
+       if (count < 0)
+               ecode = count;
+       tdb_allrecord_unlock(tdb, F_WRLCK);
+       return ecode;
+}