1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
unit Timer;
interface
uses
Windows,
SysUtils;
(*******************************************************************************
* Example: *
* *
* var *
* timeRec : TTimeRec; *
* elapsed : double; *
* begin *
* StartTimer(timeRec); *
* DoSomeLengthyOp(); *
* elapsed := EndTimer(timeRec) *
* Caption := Format('DoSomeLengthyOp took %1.3n secs', [elapsed); *
* end; *
*******************************************************************************)
{$I Clipper.inc}
{$IFDEF FPC}
{$MODE DELPHI}
{$ENDIF}
type
TTimeRec = record
freq : TLargeInteger;
startTime : TLargeInteger;
endTime : TLargeInteger;
end;
(out timeRec: TTimeRec);
(timeRec: TTimeRec): double;
implementation
(out timeRec: TTimeRec);
begin
QueryPerformanceFrequency(timeRec.freq);
QueryPerformanceCounter(timeRec.startTime);
timeRec.endTime := timeRec.startTime;
end;
(timeRec: TTimeRec): double;
begin
QueryPerformanceCounter(timeRec.endTime);
with timeRec do
Result := (endTime - startTime)/freq;
end;
end.