time: add timemono_since

[ccan] / ccan / time / time.h

diff --git a/ccan/time/time.h b/ccan/time/time.h
index 5c916f4c4c2ef04b9648791d862bb3eea731a6cd..54d92c57b89090152a9c1a42e10c656ee0c2e82c 100644 (file)
--- a/ccan/time/time.h
+++ b/ccan/time/time.h
@@ -127,7 +127,7 @@ struct timeabs time_now(void);
  * This value is only really useful for measuring time intervals.
  *
  * See also:
- *     time_since()
+ *     timemono_since()
  */
 struct timemono time_mono(void);
 
@@ -320,6 +320,17 @@ static inline struct timerel timemono_between(struct timemono recent,
        return t;
 }
 
+/**
+ * timemono_since - elapsed monotonic time since @old
+ * @old: a monotonic time from the past.
+ */
+static inline struct timerel timemono_since(struct timemono old)
+{
+       struct timemono now = time_mono();
+
+       return timemono_between(now, old);
+}
+
 /**
  * timeabs_sub - subtract a relative time from an absolute time
  * @abs: the absolute time.