From b8e45926f66fd928bccf2b03377f20788f52774b Mon Sep 17 00:00:00 2001
From: Vincent Sanders <vince@kyllikki.org>
Date: Wed, 26 Nov 2014 23:41:33 +0000
Subject: move to using POSIX monotonic clock if available

---
 src/time.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'src/time.c')

diff --git a/src/time.c b/src/time.c
index b29c2eb..582bc9d 100644
--- a/src/time.c
+++ b/src/time.c
@@ -14,19 +14,27 @@
 
 #include <stdint.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include <sys/time.h>
+#include <time.h>
 
 #include "nsutils/time.h"
 
 /* exported interface documented in nsutils/time.h */
 nsuerror nsu_getmonotonic_ms(uint64_t *current)
 {
+#if (_POSIX_TIMERS > 0) && (defined _POSIX_MONOTONIC_CLOCK)
+    struct timespec tp;
+    clock_gettime(CLOCK_MONOTONIC, &tp);
+    *current = (tp.tv_sec * 1000) + (tp.tv_nsec / 1000000);
+#else
+#warning "Using dodgy gettimeofday() fallback"
     /** \todo Implement this properly! */
     struct timeval tv;
 
     gettimeofday(&tv, NULL);
 
     *current = (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
-
+#endif
     return NSUERROR_OK;
 }
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