if (tdb->flags & TDB_NOLOCK)
return 0;
- if (tdb->read_only) {
+ if ((rw_type == F_WRLCK) && (tdb->read_only)) {
errno = EACCES;
return -1;
}
return tdb_unlock(tdb, BUCKET(tdb_hash(&key)), F_WRLCK);
}
+int tdb_chainlock_read(TDB_CONTEXT *tdb, TDB_DATA key)
+{
+ return tdb_lock(tdb, BUCKET(tdb_hash(&key)), F_RDLCK);
+}
+
+int tdb_chainunlock_read(TDB_CONTEXT *tdb, TDB_DATA key)
+{
+ return tdb_unlock(tdb, BUCKET(tdb_hash(&key)), F_RDLCK);
+}
+
/* register a loging function */
void tdb_logging_function(TDB_CONTEXT *tdb, void (*fn)(TDB_CONTEXT *, int , const char *, ...))
Lock a chain with timeout (in seconds).
****************************************************************************/
-int tdb_chainlock_with_timeout( TDB_CONTEXT *tdb, TDB_DATA key, unsigned int timeout)
+static int tdb_chainlock_with_timeout( TDB_CONTEXT *tdb, TDB_DATA key, unsigned int timeout, int rw_type)
{
/* Allow tdb_chainlock to be interrupted by an alarm. */
int ret;
alarm(timeout);
}
- ret = tdb_chainlock(tdb, key);
+ if (rw_type == F_RDLCK)
+ ret = tdb_chainlock_read(tdb, key);
+ else
+ ret = tdb_chainlock(tdb, key);
if (timeout) {
alarm(0);
CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
- if (gotalarm)
+ if (gotalarm) {
+ DEBUG(0,("tdb_chainlock_with_timeout: alarm (%u) timed out for key %s in tdb %s\n",
+ timeout, key.dptr, tdb->name ));
return -1;
+ }
}
return ret;
key.dptr = keyval;
key.dsize = strlen(keyval)+1;
- return tdb_chainlock_with_timeout(tdb, key, timeout);
+ return tdb_chainlock_with_timeout(tdb, key, timeout, F_WRLCK);
}
/****************************************************************************
tdb_chainunlock(tdb, key);
}
+/****************************************************************************
+ Read lock a chain by string. Return -1 if timeout or lock failed.
+****************************************************************************/
+
+int tdb_read_lock_bystring(TDB_CONTEXT *tdb, char *keyval, unsigned int timeout)
+{
+ TDB_DATA key;
+
+ key.dptr = keyval;
+ key.dsize = strlen(keyval)+1;
+
+ return tdb_chainlock_with_timeout(tdb, key, timeout, F_RDLCK);
+}
+
+/****************************************************************************
+ Read unlock a chain by string.
+****************************************************************************/
+
+void tdb_read_unlock_bystring(TDB_CONTEXT *tdb, char *keyval)
+{
+ TDB_DATA key;
+
+ key.dptr = keyval;
+ key.dsize = strlen(keyval)+1;
+
+ tdb_chainunlock_read(tdb, key);
+}
+
+
/****************************************************************************
Fetch a int32 value by a arbitrary blob key, return -1 if not found.
Output is int32 in native byte order.