X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=include%2Flttng%2Flttng.h;h=4171cde41c998d123fac3b407a337ec622b42cfe;hp=dd5d936c5faaed64910f4220e04025b691606028;hb=806e2684ce24d3772af37ee46c5f0500c7a0723f;hpb=03b1319df1a6c74a152d4723bf1bf9e1cdf770e1

diff --git a/include/lttng/lttng.h b/include/lttng/lttng.h
index dd5d936c5..4171cde41 100644
--- a/include/lttng/lttng.h
+++ b/include/lttng/lttng.h
@@ -29,6 +29,10 @@
 /* Error codes that can be returned by API calls */
 #include <lttng/lttng-error.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * Event symbol length. Copied from LTTng kernel ABI.
  */
@@ -257,6 +261,7 @@ struct lttng_event_field {
 	enum lttng_event_field_type type;
 	char padding[LTTNG_EVENT_FIELD_PADDING];
 	struct lttng_event event;
+	int nowrite;
 };
 
 /*
@@ -576,4 +581,18 @@ extern int lttng_disable_consumer(struct lttng_handle *handle);
  */
 extern int lttng_health_check(enum lttng_health_component c);
 
+/*
+ * For a given session name, this call checks if the data is ready to be read
+ * or is still being extracted by the consumer(s) hence not ready to be used by
+ * any readers.
+ *
+ * Return 0 if the data is _NOT_ available else 1 if the data is ready. On
+ * error, a negative value is returned and readable by lttng_strerror().
+ */
+extern int lttng_data_available(const char *session_name);
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* LTTNG_H */