Alexandre Julliard : kernel32: Use the monotonic counter in GetTickCount64.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: fa9a883dbbd49117c2e53f5b3ea8cd49397bf520
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=fa9a883dbbd49117c2e53f5b3ea8cd49397bf520

Author: Alexandre Julliard <julliard at winehq.org>
Date:   Fri Jan 25 17:28:48 2013 +0100

kernel32: Use the monotonic counter in GetTickCount64.

---

 dlls/kernel32/kernel_main.c |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/dlls/kernel32/kernel_main.c b/dlls/kernel32/kernel_main.c
index cf06765..2edfcbc 100644
--- a/dlls/kernel32/kernel_main.c
+++ b/dlls/kernel32/kernel_main.c
@@ -179,10 +179,10 @@ INT WINAPI MulDiv( INT nMultiplicand, INT nMultiplier, INT nDivisor)
  */
 ULONGLONG WINAPI GetTickCount64(void)
 {
-    LARGE_INTEGER now;
+    LARGE_INTEGER counter, frequency;
 
-    NtQuerySystemTime( &now );
-    return (now.QuadPart - server_start_time) / 10000;
+    NtQueryPerformanceCounter( &counter, &frequency );
+    return counter.QuadPart * 1000 / frequency.QuadPart;
 }
 
 
@@ -199,8 +199,6 @@ ULONGLONG WINAPI GetTickCount64(void)
  *
  * NOTES
  *  The value returned will wrap around every 2^32 milliseconds.
- *  Under Windows, tick 0 is the moment at which the system is rebooted.
- *  Under Wine, tick 0 begins at the moment the wineserver process is started.
  */
 DWORD WINAPI GetTickCount(void)
 {