Improve clock_gettime and utimensat resolution.

* hires.h (hires_ms): Change initime_us to initime_ns, with 10x
more resolution.
(hires_ms::nsecs): New prototype.
(hires_ms::usecs, hires_ms::msecs, hires_ms::uptime): Adjust.
* times.cc (systime_ns): New helper function.
(hires_ms::prime): Use it for more resolution.
(hires_ms::usecs): Change to...
(hires_ms::nsecs): ...with more resolution.
(clock_gettime): Use more resolution.
(systime): Rewrite in terms of systime_ns.
(timespec_to_filetime): Rewrite math to reflect true operation.
* fhandler_disk_file.cc (utimens_fs): Use higher resolution.

1 files changed, 6 insertions, 5 deletions

diff --git a/winsup/cygwin/hires.h b/winsup/cygwin/hires.h
index 3c7bd2722..e91df0690 100644
--- a/winsup/cygwin/hires.h
+++ b/winsup/cygwin/hires.h
@@ -1,6 +1,6 @@
 /* hires.h: Definitions for hires clock calculations
 
-   Copyright 2002, 2003, 2004, 2005 Red Hat, Inc.
+   Copyright 2002, 2003, 2004, 2005, 2009 Red Hat, Inc.
 
 This file is part of Cygwin.
 
@@ -39,14 +39,15 @@ class hires_us : hires_base
 
 class hires_ms : hires_base
 {
-  LONGLONG initime_us;
+  LONGLONG initime_ns;
   void prime ();
  public:
-  LONGLONG usecs ();
-  LONGLONG msecs () {return usecs () / 1000LL;}
+  LONGLONG nsecs ();
+  LONGLONG usecs () {return nsecs () / 10LL;}
+  LONGLONG msecs () {return nsecs () / 10000LL;}
   UINT dmsecs () { return timeGetTime (); }
   UINT resolution ();
-  LONGLONG uptime () {return (usecs () - initime_us) / 1000LL;}
+  LONGLONG uptime () {return (nsecs () - initime_ns) / 10000LL;}
 };
 
 extern hires_ms gtod;