Extend kqueue's EVFILT_TIMER by adding precision unit flags support

Define the precision macros as bits sets to conform with XNU equivalent.
Test fflags passed for EVFILT_TIMER and return EINVAL in case an invalid flag
is passed.

Phabric:	https://phabric.freebsd.org/D421
Reviewed by:	kib

1 files changed, 6 insertions, 0 deletions

diff --git a/sys/sys/event.h b/sys/sys/event.h
index 1f27c4d..7b0b798 100644
--- a/sys/sys/event.h
+++ b/sys/sys/event.h
@@ -133,6 +133,12 @@ struct kevent {
 #define	NOTE_TRACKERR	0x00000002		/* could not track child */
 #define	NOTE_CHILD	0x00000004		/* am a child process */
 
+/* additional flags for EVFILE_TIMER */
+#define NOTE_SECONDS		0x00000001	/* data is seconds */
+#define NOTE_MSECONDS		0x00000002	/* data is milliseconds */
+#define NOTE_USECONDS		0x00000004	/* data is microseconds */
+#define NOTE_NSECONDS		0x00000008	/* data is nanoseconds */
+
 struct knote;
 SLIST_HEAD(klist, knote);
 struct kqueue;