curious about GetLocalTime

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moriman

Joined: 01 Apr 2006
Posts: 55
Location: Northern Ireland

moriman 09 Apr 2006, 17:22

Hi,

Have been using GetLocalTime to test (and optimize) the speed of various parts of my code...

Code:

.
.
start_time      SYSTEMTIME
.
.
invoke  GetLocalTime, start_time
mov     ax, [start_time.wMilliseconds]
.
.

I have found that the wMilliseconds component is always a multiple of ten¿
How come it never returns single milliseconds?

I know it's not earth-shatteringly important, but I'm just a tad curious Wink

tia

mori

09 Apr 2006, 17:22

UCM

Joined: 25 Feb 2005
Posts: 285
Location: Canada

UCM 09 Apr 2006, 18:16

probably windows sets the timer to 100Hz or something...
but ask them, not me Wink

09 Apr 2006, 18:16

vbVeryBeginner

Joined: 15 Aug 2004
Posts: 884
Location: \\world\asia\malaysia

vbVeryBeginner 09 Apr 2006, 19:34

i code the following to test what you mentioned.
but i got wMilliseconds not always multiple of ten

in my test, it returned single milisecond, ~ 6 :p

you could get my source + binary and try run on your machine.
btw, nlited winxp (gold) here.

http://sulaiman.netadvant.com/fasm/t1.zip

09 Apr 2006, 19:34

moriman

Joined: 01 Apr 2006
Posts: 55
Location: Northern Ireland

moriman 09 Apr 2006, 20:09

maybe there is some difference when using it under windoze as opposed to dos¿

09 Apr 2006, 20:09

RedGhost

Joined: 18 May 2005
Posts: 443
Location: BC, Canada

RedGhost 09 Apr 2006, 20:16

you can always use GetTickCount

Quote:

Retrieves the number of milliseconds that have elapsed since the system was started

initial_time = GetTickCount( )

;;;;;

time_elapsed = GetTickCount( )-initial_time

_________________
redghost.ca

09 Apr 2006, 20:16

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia

vid 09 Apr 2006, 21:45

check things like LocalTimeToFileTime or whatever it is called, "file time" is 64bit number counting some 10000000s of second (not sure about the constant, it is 100s of nanoseconds).

you can find it somehow Smile

09 Apr 2006, 21:45

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