X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=lib%2Fiterator.c;h=a2a7bb578adca29313b9bda620382bfe67b8248c;hp=966a00010e3e82a8393987f72f78b9e4d820c70f;hb=024e61817685a20caceb4e3ef3bdc019a7af6b6e;hpb=13ec125abb88a60fc5e11ff904b525e1f00a331b

diff --git a/lib/iterator.c b/lib/iterator.c
index 966a0001..a2a7bb57 100644
--- a/lib/iterator.c
+++ b/lib/iterator.c
@@ -65,6 +65,9 @@ static int stream_read_event(struct ctf_file_stream *sin)
 	ret = sin->pos.parent.event_cb(&sin->pos.parent, &sin->parent);
 	if (ret == EOF)
 		return EOF;
+	else if (ret == EAGAIN)
+		/* Stream is inactive for now (live reading). */
+		return EAGAIN;
 	else if (ret) {
 		fprintf(stderr, "[error] Reading event failed.\n");
 		return ret;
@@ -716,7 +719,7 @@ int bt_iter_init(struct bt_iter *iter,
 				if (ret == EOF) {
 					ret = 0;
 					continue;
-				} else if (ret) {
+				} else if (ret != 0 && ret != EAGAIN) {
 					goto error;
 				}
 				/* Add to heap */
@@ -801,13 +804,28 @@ int bt_iter_next(struct bt_iter *iter)
 		assert(removed == file_stream);
 		ret = 0;
 		goto end;
+	} else if (ret == EAGAIN) {
+		/*
+		 * The stream is inactive for now, we just updated the timestamp_end
+		 * to skip over this stream up to a certain point in time.
+		 */
+		goto reinsert;
 	} else if (ret) {
 		goto end;
 	}
+
+reinsert:
 	/* Reinsert the file stream into the heap, and rebalance. */
 	removed = bt_heap_replace_max(iter->stream_heap, file_stream);
 	assert(removed == file_stream);
 
+	file_stream = bt_heap_maximum(iter->stream_heap);
+	if (file_stream->pos.content_size == 0) {
+		ret = EAGAIN;
+	} else {
+		ret = 0;
+	}
+
 end:
 	return ret;
 }