[Lazarus] Portable way to get accurate timestamps?

[Petr Kristan]

On Sun, Feb 20, 2011 at 02:46:34PM +0100, Luca Olivetti wrote:
> Al 20/02/11 12:42, En/na Bo Berglund ha escrit:
> 
> > I wonder if GetTickCount will get me a better value to milliseconds
> > than Now()?
> 
> Not under linux:
> 
> function GetTickCount: DWord;
> begin
>   Result := DWord(Trunc(Now * 24 * 60 * 60 * 1000));
> end;     

My Linux version: 

function GetTickCount: Cardinal;
var
  ts: TTimeSpec;
  i: Int64;
begin
  if clock_gettime(CLOCK_MONOTONIC, @ts) <> 0 then begin //kernels 2.4.* does not support
    Result := 0;
    Exit;
  end;
  i := ts.tv_sec;
  i := i*1000 + ts.tv_nsec div 1000000;
  Result := i and $ffffffff; //cut to unsig 32bit
end;

Petr

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Petr Kristan
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