lib/util: add time_mono() for monotonic time a la time()

2 files changed, 26 insertions, 0 deletions

diff --git a/lib/util/time.c b/lib/util/time.c
index 5ecf93cb77..ed3b4f8e30 100644
--- a/lib/util/time.c
+++ b/lib/util/time.c
@@ -65,6 +65,27 @@ _PUBLIC_ void clock_gettime_mono(struct timespec *tp)
 	}
 }
 
+/**
+a wrapper to preferably get the monotonic time in seconds
+as this is only second resolution we can use the cached
+(and much faster) COARS clock variant
+**/
+_PUBLIC_ time_t time_mono(time_t *t)
+{
+	struct timespec tp;
+	int rc = -1;
+#ifdef CLOCK_MONOTONIC_COARSE
+	rc = clock_gettime(CLOCK_MONOTONIC_COARSE,&tp);
+#endif
+	if (rc != 0) {
+		clock_gettime_mono(&tp);
+	}
+	if (t != NULL) {
+		*t = tp.tv_sec;
+	}
+	return tp.tv_sec;
+}
+
 
 #define TIME_FIXUP_CONSTANT 11644473600LL
 
diff --git a/lib/util/time.h b/lib/util/time.h
index 720a262b29..345382b80a 100644
--- a/lib/util/time.h
+++ b/lib/util/time.h
@@ -56,6 +56,11 @@ a wrapper to preferably get the monotonic time
 _PUBLIC_ void clock_gettime_mono(struct timespec *tp);
 
 /**
+a wrapper to preferably get the monotonic time in s
+**/
+_PUBLIC_ time_t time_mono(time_t *t);
+
+/**
 interpret an 8 byte "filetime" structure to a time_t
 It's originally in "100ns units since jan 1st 1601"
 **/