_PUBLIC_ int tdb_parse_record(struct tdb_context *tdb, TDB_DATA key,
int (*parser)(TDB_DATA key, TDB_DATA data,
void *private_data),
void *private_data)
{
tdb_off_t rec_ptr;
struct tdb_record rec;
int ret;
uint32_t hash;
/* find which hash bucket it is in */
hash = tdb->hash_fn(&key);
if (!(rec_ptr = tdb_find_lock_hash(tdb,key,hash,F_RDLCK,&rec))) {
/* record not found */
tdb_trace_1rec_ret(tdb, "tdb_parse_record", key, -1);
tdb->ecode = TDB_ERR_NOEXIST;
return -1;
}
tdb_trace_1rec_ret(tdb, "tdb_parse_record", key, 0);
ret = tdb_parse_data(tdb, key, rec_ptr + sizeof(rec) + rec.key_len,
rec.data_len, parser, private_data);
tdb_unlock(tdb, BUCKET(rec.full_hash), F_RDLCK);
return ret;
}
_PUBLIC_ int tdb_exists(struct tdb_context *tdb, TDB_DATA key)
{
uint32_t hash = tdb->hash_fn(&key);
int ret;
ret = tdb_exists_hash(tdb, key, hash);
tdb_trace_1rec_ret(tdb, "tdb_exists", key, ret);
return ret;
}
/* lock/unlock one hash chain, non-blocking. This is meant to be used
to reduce contention - it cannot guarantee how many records will be
locked */
_PUBLIC_ int tdb_chainlock_nonblock(struct tdb_context *tdb, TDB_DATA key)
{
int ret = tdb_lock_nonblock(tdb, BUCKET(tdb->hash_fn(&key)), F_WRLCK);
tdb_trace_1rec_ret(tdb, "tdb_chainlock_nonblock", key, ret);
return ret;
}
