diff options
Diffstat (limited to 'winsup/cygwin/times.cc')
| -rw-r--r-- | winsup/cygwin/times.cc | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/winsup/cygwin/times.cc b/winsup/cygwin/times.cc index bd8f1cf..f0359bf 100644 --- a/winsup/cygwin/times.cc +++ b/winsup/cygwin/times.cc @@ -1,7 +1,7 @@ /* times.cc Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, - 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Red Hat, Inc. + 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Red Hat, Inc. This file is part of Cygwin. @@ -42,6 +42,23 @@ get_system_time (PLARGE_INTEGER systime) : GetSystemTimeAsFileTime ((LPFILETIME) systime); } +/* There's no GetTickCount64 on pre-Vista. This is the do-it-yourself kit, + as it was implemented as hires_ms::timeGetTime_ns once. Resurrect the + functionality to allow reliable (albeit low res) timing values. The + function returns the value in 100ns interval to avoid a division by 10000. */ +ULONGLONG +GetTickCount_ns () +{ + LARGE_INTEGER t; + do + { + t.HighPart = SharedUserData.InterruptTime.High1Time; + t.LowPart = SharedUserData.InterruptTime.LowPart; + } + while (t.HighPart != SharedUserData.InterruptTime.High2Time); + return (ULONGLONG) t.QuadPart; +} + /* Cygwin internal */ static uint64_t __stdcall __to_clock_t (PLARGE_INTEGER src, int flag) |