From ddc1aa0b5fe931c2127e91d5a7fff6f2de6be156 Mon Sep 17 00:00:00 2001
From: Roman Stoffel <roman.stoffel@gamlor.info>
Date: Thu, 23 Mar 2017 23:06:24 +0100
Subject: [PATCH] GUACAMOLE-239: When available, use CLOCK_MONOTONIC to prevent
 backwards running time

---
 src/libguac/timestamp.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/libguac/timestamp.c b/src/libguac/timestamp.c
index d3b79c63..0d2dc0a8 100644
--- a/src/libguac/timestamp.c
+++ b/src/libguac/timestamp.c
@@ -33,9 +33,13 @@ guac_timestamp guac_timestamp_current() {
 
     struct timespec current;
 
-    /* Get current time */
+    /* Get current time, monotonically increasing */ 
+#ifdef CLOCK_MONOTONIC
+    clock_gettime(CLOCK_MONOTONIC, &current);
+#else
     clock_gettime(CLOCK_REALTIME, &current);
-    
+#endif    
+
     /* Calculate milliseconds */
     return (guac_timestamp) current.tv_sec * 1000 + current.tv_nsec / 1000000;