tdb2: Implement tdb_get_flags, tdb_add_flag and tdb_remove_flag.

[ccan] / ccan / tdb2 / tdb2.h

diff --git a/ccan/tdb2/tdb2.h b/ccan/tdb2/tdb2.h
index 52c26959d02cb412496b7f00a5e8eff542ed2667..47661da245352583f5491b440fec2e58b1ff0e68 100644 (file)
--- a/ccan/tdb2/tdb2.h
+++ b/ccan/tdb2/tdb2.h
@@ -332,18 +332,27 @@ enum TDB_ERROR tdb_chainunlock(struct tdb_context *tdb, TDB_DATA key);
  * tdb_check - check a TDB for consistency
  * @tdb: the tdb context returned from tdb_open()
  * @check: function to check each key/data pair (or NULL)
- * @private_data: pointer for @check
+ * @private: argument for @check, must match type.
  *
  * This performs a consistency check of the open database, optionally calling
  * a check() function on each record so you can do your own data consistency
  * checks as well.  If check() returns an error, that is returned from
  * tdb_check().
+ *
+ * Returns TDB_SUCCESS or an error.
  */
-enum TDB_ERROR tdb_check(struct tdb_context *tdb,
-                        enum TDB_ERROR (*check)(TDB_DATA key,
-                                                TDB_DATA data,
-                                                void *private_data),
-                        void *private_data);
+#define tdb_check(tdb, check, private)                                 \
+       tdb_check_((tdb), typesafe_cb_preargs(enum TDB_ERROR,           \
+                                             (check), (private),       \
+                                             struct tdb_data,          \
+                                             struct tdb_data),         \
+                  (private))
+
+enum TDB_ERROR tdb_check_(struct tdb_context *tdb,
+                         enum TDB_ERROR (*check)(struct tdb_data key,
+                                                 struct tdb_data data,
+                                                 void *private),
+                         void *private);
 
 /**
  * enum tdb_summary_flags - flags for tdb_summary.
@@ -370,6 +379,37 @@ enum TDB_ERROR tdb_summary(struct tdb_context *tdb,
                           enum tdb_summary_flags flags,
                           char **summary);
 
+ 
+/**
+ * tdb_get_flags - return the flags for a tdb
+ * @tdb: the tdb context returned from tdb_open()
+ *
+ * This returns the flags on the current tdb.  Some of these are caused by
+ * the flags argument to tdb_open(), others (such as TDB_CONVERT) are
+ * intuited.
+ */
+unsigned int tdb_get_flags(struct tdb_context *tdb);
+
+/**
+ * tdb_add_flag - set a flag for a tdb
+ * @tdb: the tdb context returned from tdb_open()
+ * @flag: one of TDB_NOLOCK, TDB_NOMMAP or TDB_NOSYNC.
+ *
+ * You can use this to set a flag on the TDB.  You cannot set these flags
+ * on a TDB_INTERNAL tdb.
+ */
+void tdb_add_flag(struct tdb_context *tdb, unsigned flag);
+
+/**
+ * tdb_remove_flag - unset a flag for a tdb
+ * @tdb: the tdb context returned from tdb_open()
+ * @flag: one of TDB_NOLOCK, TDB_NOMMAP or TDB_NOSYNC.
+ *
+ * You can use this to clear a flag on the TDB.  You cannot clear flags
+ * on a TDB_INTERNAL tdb.
+ */
+void tdb_remove_flag(struct tdb_context *tdb, unsigned flag);
+
 /**
  * enum tdb_attribute_type - descriminator for union tdb_attribute.
  */