add is_marker_enabled function from lttng kt

diff --git a/libust/marker.c b/libust/marker.c
index d9cb88fca96b7c0f8521e32b1c270ed1ae549df7..01a515d173c6c22be521cedafd8945c293c55498 100644 (file)
--- a/libust/marker.c
+++ b/libust/marker.c
@@ -672,6 +672,24 @@ static void disable_marker(struct marker *elem)
         */
 }
 
+/*
+ * is_marker_enabled - Check if a marker is enabled
+ * @channel: channel name
+ * @name: marker name
+ *
+ * Returns 1 if the marker is enabled, 0 if disabled.
+ */
+int is_marker_enabled(const char *channel, const char *name)
+{
+       struct marker_entry *entry;
+
+       mutex_lock(&markers_mutex);
+       entry = get_marker(channel, name);
+       mutex_unlock(&markers_mutex);
+
+       return entry && !!entry->refcount;
+}
+
 /**
  * marker_update_probe_range - Update a probe range
  * @begin: beginning of the range