How to Calculate Time Difference in Milliseconds

[pdaughe]

$Previous_Time = TimerInit ()

Sleep (5000) ;sleep five seconds

$Current_Time = $TimerInit ()

$Time_Difference = $Current_Time - $Previous_Time

Is the time difference calculation proper? I expect $Time_Difference to contain the millisecond time difference. It doesn't appear to.

I know about the TimerDiff function, but in my case I want to get the millisecond time difference in two times that are stored. Both times were obtained via $TimerInit.

Thank you for your help,

Paul

[gamepin126]

Like this?

#include <GuiConstants.au3>
#include <_Talk.au3>
GuiCreate("Timer", 300, 118,-1, -1 , BitOR($WS_OVERLAPPEDWINDOW, $WS_CLIPSIBLINGS))

$Label_5 = GuiCtrlCreateLabel("Enter the time and press begin, a msgbox will prompt when the time has finished.", 20, 0, 240, 30)
$Hours = GuiCtrlCreateInput("Hours", 10, 90, 50, 20)
$Mins = GuiCtrlCreateInput("Minutes", 70, 90, 50, 20)
$Sec = GuiCtrlCreateInput("Seconds", 130, 90, 50, 20)
$Button_4 = GuiCtrlCreateButton("Begin", 210, 90, 80, 20)
GuiSetState()
While 1
    $msg = GuiGetMsg()
    Select
        Case $msg = $Button_4
            $h = GUICtrlRead($Hours)
            $m = GUICtrlRead($Mins)
            $s = GUICtrlRead($Sec)
            $hms = GUICtrlRead($Hours) * 360000
            $mms = GUICtrlRead($Mins) * 60000
            $sms = GUICtrlRead($Sec) * 1000
            Sleep($hms + $mms + $sms)
            _Talk("rawr the time is up")
            MsgBox(0, "", "Time's up!" & @CRLF & "Elapsed Time: " & $h & " : " & $m & " : " & $s)
    Case $msg = $GUI_EVENT_CLOSE
        ExitLoop
    Case Else
        ;;;
    EndSelect
WEnd
Exit

Edited July 13, 2006 by gamepin126

[GaryFrost]

I believe this is what you want:

$Previous_Time = TimerInit()
Sleep (5000) ;sleep five seconds
$Time_Difference = TimerDiff($Previous_Time)
MsgBox(0,"Diff",$Time_Difference)

[/dev/null]

I know about the TimerDiff function, but in my case I want to get the millisecond time difference in two times that are stored. Both times were obtained via $TimerInit.

actually TimerInit does not really return a time stamp in milliseconds, but rather an "internal" number. If you look at the TimerDiff() source code, you'll see, that the frequency of the high-resolution performance counter is used in the calculation of the time difference in milliseconds.

script_misc.cpp: F_TimerDiff

    __int64 freq, now;

    if (!QueryPerformanceFrequency((LARGE_INTEGER *)&freq))
        return AUT_OK;

    if (!QueryPerformanceCounter((LARGE_INTEGER *)&now))
        return AUT_OK;

    vResult = (((double)now - vParams[0].fValue()) / (double)freq) * 1000.0;

see also: MSDN

So, you can't simply subtract the two values you retrieved via TimerInit(). I guess, you'll have to use

TimerDiff().

EDIT: However, TimerDiff() could be modified to accept a second argument. Like this: $diff = TimerDiff($start,$end), so it would not take the current value of the performance counter (now), but rather the specified values of $start and $end". Code could look like this:

script_misc.cpp: F_TimerDiff

    __int64 freq, now;

    if (!QueryPerformanceFrequency((LARGE_INTEGER *)&freq))
        return AUT_OK;

    if (!QueryPerformanceCounter((LARGE_INTEGER *)&now))
        return AUT_OK;

    if (vParams.size() == 2)
        vResult = ((vParams[1].fValue() - vParams[0].fValue()) / (double)freq) * 1000.0;
    else 
        vResult = (((double)now - vParams[0].fValue()) / (double)freq) * 1000.0;

    return AUT_OK;

Cheers

Kurt

Edited July 13, 2006 by /dev/null

[pdaughe]

Thanks for the replies.

Kurt, you're right -- I need to calculate the time difference, in milliseconds, between two stored times. TimerDiff doesn't help in this case, but the modifed TimerDiff you posted certainly would. The problem is: I don't understand. I am using Autoit V3. I don't see where the TimerDiff function is shipped with the standard download.

Can I use what you posted and how would I use it? My Autoit application is just a batch script, not a GUI.

Thank you VERY MUCH.

Paul

[SmOke_N]

Thanks for the replies.

Kurt, you're right -- I need to calculate the time difference, in milliseconds, between two stored times. TimerDiff doesn't help in this case, but the modifed TimerDiff you posted certainly would. The problem is: I don't understand. I am using Autoit V3. I don't see where the TimerDiff function is shipped with the standard download.

Can I use what you posted and how would I use it? My Autoit application is just a batch script, not a GUI.

Thank you VERY MUCH.

Paul

You'll find it quite useful if you want to run most of the scripts and have all the functionality that people talk about to download the Beta of AutoIt.

[/dev/null]

Can I use what you posted and how would I use it? My Autoit application is just a batch script, not a GUI.

Paul,

I just proposed a possible change to the current functionality of TimerDiff(). It is not yet implemented nor can you download it somewhere. I just used the available source code of AutoIT 3 and made a very small change to fit your requirements. I would have to submit those changes to the DEV team and wait for an inclusion in the next beta release. However, it's totally unclear if my change request will be accepted. So, for the moment there is unfortunately nothing you can do.

Maybe you want to describe why you need the difference of two timestamps? I guess the forum members can then propose another solution.

EDIT: well there is one thing you could do. Do a DllCall on QueryPerformanceFrequency and QueryPerformanceCounter and "simulate" the internals of TimerInit() and TimerDiff().

Cheers

Kurt

Edited July 14, 2006 by /dev/null

[herewasplato]

...I don't see where the TimerDiff function is shipped with the standard download...

...but it is:

http://www.autoitscript.com/autoit3/docs/f...s/TimerDiff.htm

:-)

[/dev/null]

...but it is:

http://www.autoitscript.com/autoit3/docs/f...s/TimerDiff.htm

:-)

No it's not. Please read my post.

Cheers

Kurt

[Valuater]

maybe this... from autoit wrappers

; timer to "thousandths" of a second
; Author - Holger

While 1
    ToolTip(@Hour & ':' & @Min & ':' & @Sec & ':' & _MSec())
    Sleep(1)
WEnd

Exit

Func _MSec()
    Local $stSystemTime = DllStructCreate('ushort;ushort;ushort;ushort;ushort;ushort;ushort;ushort')
    DllCall('kernel32.dll', 'none', 'GetSystemTime', 'ptr', DllStructGetPtr($stSystemTime))

    $sMilliSeconds = StringFormat('%03d', DllStructGetData($stSystemTime, 8))
    
    $stSystemTime = 0
    
    Return $sMilliSeconds
EndFunc

8)

[herewasplato]

No it's not. Please read my post.

Cheers

Kurt

I understood that your proposed version is not in the standard download.

My brief post was meant to convey that "The TimerDiff function is shipped with the standard download."

Upon review, it was probably not worth posting. Sorry for any confusion.

I hope that you proposed version makes it in...

@Valuater - Nice find.

@Holger - Must be nice to just build you own :-)