add fps reporting

1 files changed, 8 insertions, 0 deletions

diff --git a/common.c b/common.c
index b60b833..32fe46a 100644
--- a/common.c
+++ b/common.c
@@ -28,6 +28,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 
 #include "common.h"
 
@@ -357,3 +358,10 @@ int link_program(unsigned program)
 
 	return 0;
 }
+
+int64_t get_time_ns(void)
+{
+	struct timespec tv;
+	clock_gettime(CLOCK_MONOTONIC, &tv);
+	return tv.tv_nsec + tv.tv_sec * NSEC_PER_SEC;
+}