support: Add xclock_now helper function.

It's easier to read and write tests with:

 const struct timespec ts = xclock_now(CLOCK_REALTIME);

than

 struct timespec ts;
 xclock_gettime(CLOCK_REALTIME, &ts);

	* support/xtime.h: Add xclock_now() helper function.

1 files changed, 10 insertions, 0 deletions

diff --git a/support/xtime.h b/support/xtime.h
index 68af1a5..6e19ce1 100644
--- a/support/xtime.h
+++ b/support/xtime.h
@@ -28,6 +28,16 @@ __BEGIN_DECLS
 
 void xclock_gettime (clockid_t clock, struct timespec *ts);
 
+/* This helper can often simplify tests by avoiding an explicit
+   variable declaration or allowing that declaration to be const. */
+
+static inline struct timespec xclock_now (clockid_t clock)
+{
+  struct timespec ts;
+  xclock_gettime (clock, &ts);
+  return ts;
+}
+
 __END_DECLS
 
 #endif /* SUPPORT_TIME_H */