[boost] xtime and GetSystemTimeAsFileTime

From: Simon J. Julier (sjulier_at_[hidden])
Date: 2002-06-30 21:56:04

A colleague of mine (Reinhold Behringer at RSC) drew my attention to the 
fact that there is a problem with the Windows implementation of 
xtime_get(.) because it uses GetSystemTimeAsFileTime. There are two 
documented problems with this Win32 API function:

1. The Windows system timer runs between 10ms and 55ms, depending on the 
version of Windows used 
(http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sysinfo/ti 
me_5h2d.asp). Reinhold tells me that the value returned by 
GetSystemTimeAsFileTime seems to update at the same rate.

2. "If GetSystemTimeAsFileTime() is called at the precise split second 
during which the date changes from one day to the next (12:00:00.000 AM), 
the API may return a value indicating 12:00 AM for the previous day." 
(Synopsis from 
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q224423). This bug 
affects Windows 9x and Me.

Has anybody looked at these issues?

Cheers,

Simon