From: Pierre-Marc Fournier <pierre-marc.fournier@polymtl.ca>
Date: Fri, 18 Dec 2009 20:05:23 +0000 (-0500)
Subject: add is_marker_enabled function from lttng kt
X-Git-Tag: v0.1~27
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=a53110051c34d7f46c584e3bccd927b213930d05;p=ust.git

add is_marker_enabled function from lttng kt
---

diff --git a/libust/marker.c b/libust/marker.c
index d9cb88f..01a515d 100644
--- 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