lib-util: add functions to get elapsed from given timespec structs

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

2 files changed, 28 insertions, 0 deletions

diff --git a/lib/util/time.c b/lib/util/time.c
index 05251dd3b5..a09490a198 100644
--- a/lib/util/time.c
+++ b/lib/util/time.c
@@ -652,6 +652,24 @@ _PUBLIC_ double timeval_elapsed(const struct timeval *tv)
 	struct timeval tv2 = timeval_current();
 	return timeval_elapsed2(tv, &tv2);
 }
+/**
+ *   return the number of seconds elapsed between two times
+ **/
+_PUBLIC_ double timespec_elapsed2(const struct timespec *ts1,
+				const struct timespec *ts2)
+{
+	return (ts2->tv_sec - ts1->tv_sec) +
+	       (ts2->tv_nsec - ts1->tv_nsec)*1.0e-9;
+}
+
+/**
+ *   return the number of seconds elapsed since a given time
+ */
+_PUBLIC_ double timespec_elapsed(const struct timespec *ts)
+{
+	struct timespec ts2 = timespec_current();
+	return timespec_elapsed2(ts, &ts2);
+}
 
 /**
   return the lesser of two timevals
diff --git a/lib/util/time.h b/lib/util/time.h
index 69ba783774..b5302f84c2 100644
--- a/lib/util/time.h
+++ b/lib/util/time.h
@@ -247,6 +247,16 @@ double timeval_elapsed2(const struct timeval *tv1, const struct timeval *tv2);
 double timeval_elapsed(const struct timeval *tv);
 
 /**
+  return the number of seconds elapsed between two times
+*/
+double timespec_elapsed2(const struct timespec *ts1,
+			 const struct timespec *ts2);
+/**
+  return the number of seconds elapsed since a given time
+*/
+double timespec_elapsed(const struct timespec *ts);
+
+/**
   return the lesser of two timevals
 */
 struct timeval timeval_min(const struct timeval *tv1,