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Improve clock_gettime and utimensat resolution.

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* 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.
This commit is contained in:
Eric Blake
2009-10-13 02:26:33 +00:00
parent 2fc007681e
commit b8a35083c6
4 changed files with 39 additions and 19 deletions
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11
winsup/cygwin/hires.h
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@@ -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;