X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=include%2Fbabeltrace%2Fiterator.h;h=7eb3c5ebc4c34ffea7232afd80f8fd041fb739de;hp=8c106ccb16cb0b76500264d8ae38b6f97a362ab3;hb=f60efc0e475b3c2fca3b2afc584615f6c482c9e7;hpb=03798a93f959f6c694fe98f5647481947607c604

diff --git a/include/babeltrace/iterator.h b/include/babeltrace/iterator.h
index 8c106ccb..7eb3c5eb 100644
--- a/include/babeltrace/iterator.h
+++ b/include/babeltrace/iterator.h
@@ -20,6 +20,15 @@
 #include <babeltrace/format.h>
 #include <babeltrace/context.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Flags for the iterator read_event */
+enum {
+	BT_ITER_FLAG_LOST_EVENTS	= (1 << 0),
+};
+
 /* Forward declarations */
 struct bt_iter;
 struct bt_saved_pos;
@@ -37,9 +46,16 @@ struct bt_saved_pos;
  * type represents the type of seek to use.
  * u is the argument of the seek if necessary :
  * - seek_time is the real timestamp to seek to when using BT_SEEK_TIME, it
- *   is expressed in "raw" seconds (not offsetted)
+ *   is expressed in nanoseconds
  * - restore is a position saved with bt_iter_get_pos, it is used with
  *   BT_SEEK_RESTORE.
+ *
+ * Note about BT_SEEK_LAST: if many events happen to be at the last
+ * timestamp, it is implementation-defined which event will be the last,
+ * and the order of events with the same timestamp may not be the same
+ * as normal iteration on the trace. Therefore, it is recommended to
+ * only use BT_SEEK_LAST to get the timestamp of the last event(s) in
+ * the trace.
  */
 struct bt_iter_pos {
 	enum {
@@ -47,7 +63,7 @@ struct bt_iter_pos {
 		BT_SEEK_RESTORE,	/* uses u.restore */
 		BT_SEEK_CUR,
 		BT_SEEK_BEGIN,
-		BT_SEEK_END,
+		BT_SEEK_LAST,
 	} type;
 	union {
 		uint64_t seek_time;
@@ -99,4 +115,8 @@ int bt_iter_set_pos(struct bt_iter *iter, const struct bt_iter_pos *pos);
 struct bt_iter_pos *bt_iter_create_time_pos(struct bt_iter *iter,
 		uint64_t timestamp);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* _BABELTRACE_ITERATOR_H */