#include <signal.h>
/* For uint64_t */
#include <stdint.h>
+/* For bool */
+#include <stdbool.h>
#endif
#include <ccan/compiler/compiler.h>
+#include <ccan/typesafe_cb/typesafe_cb.h>
union tdb_attribute;
struct tdb_context;
*/
enum TDB_ERROR tdb_delete(struct tdb_context *tdb, struct tdb_data key);
+/**
+ * tdb_exists - does a key exist in the database?
+ * @tdb: the tdb context returned from tdb_open()
+ * @key: the key to search for.
+ *
+ * Returns true if it exists, or false if it doesn't or any other error.
+ */
+bool tdb_exists(struct tdb_context *tdb, TDB_DATA key);
+
/**
* tdb_transaction_start - start a transaction
* @tdb: the tdb context returned from tdb_open()
*/
enum TDB_ERROR tdb_transaction_prepare_commit(struct tdb_context *tdb);
-/* FIXME: Make typesafe */
-typedef int (*tdb_traverse_func)(struct tdb_context *, TDB_DATA, TDB_DATA, void *);
-
/**
* tdb_traverse - traverse a TDB
* @tdb: the tdb context returned from tdb_open()
* On success, returns the number of keys iterated. On error returns
* a negative enum TDB_ERROR value.
*/
-int64_t tdb_traverse(struct tdb_context *tdb, tdb_traverse_func fn, void *p);
+#define tdb_traverse(tdb, fn, p) \
+ tdb_traverse_(tdb, typesafe_cb_preargs(int, (fn), (p), \
+ struct tdb_context *, \
+ TDB_DATA, TDB_DATA), (p))
+
+int64_t tdb_traverse_(struct tdb_context *tdb,
+ int (*fn)(struct tdb_context *,
+ TDB_DATA, TDB_DATA, void *), void *p);
+/**
+ * tdb_parse_record - operate directly on data in the database.
+ * @tdb: the tdb context returned from tdb_open()
+ * @key: the key whose record we should hand to @parse
+ * @parse: the function to call for the data
+ * @p: the private pointer to hand to @parse (types must match).
+ *
+ * This avoids a copy for many cases, by handing you a pointer into
+ * the memory-mapped database. It also locks the record to prevent
+ * other accesses at the same time.
+ *
+ * Do not alter the data handed to parse()!
+ */
+#define tdb_parse_record(tdb, key, parse, p) \
+ tdb_parse_record_((tdb), (key), \
+ typesafe_cb_preargs(enum TDB_ERROR, (parse), (p), \
+ TDB_DATA, TDB_DATA), (p))
+
+enum TDB_ERROR tdb_parse_record_(struct tdb_context *tdb,
+ TDB_DATA key,
+ enum TDB_ERROR (*parse)(TDB_DATA key,
+ TDB_DATA data,
+ void *p),
+ void *p);
/**
* tdb_firstkey - get the "first" key in a TDB
* @tdb: the tdb context returned from tdb_open()
*/
enum TDB_ERROR tdb_chainunlock(struct tdb_context *tdb, TDB_DATA key);
+/**
+ * tdb_wipe_all - wipe the database clean
+ * @tdb: the tdb context returned from tdb_open()
+ *
+ * Completely erase the database. This is faster than iterating through
+ * each key and doing tdb_delete.
+ */
+enum TDB_ERROR tdb_wipe_all(struct tdb_context *tdb);
+
/**
* 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.
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.
*/
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