main.pas

在Delphi源码中获取任意任务的CPU使用率。

unit main;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, StdCtrls;

type
  TForm1 = class(TForm)
    Label2: TLabel;
    Edit1: TEdit;
    Button1: TButton;
    Timer1: TTimer;
    Edit2: TEdit;
    Label1: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    procedure Timer1Timer(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Edit2Exit(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  dtStart, dtCPUPrev: Int64;
  hProcess: THandle;
  iCount:integer;

implementation

uses ProcessUtil, PubFuncs;

{$R *.dfm}

procedure TForm1.Timer1Timer(Sender: TObject);
var
  timespan,dtProcess: Int64;
begin
  if (iCount > 0) then
  begin
    timespan := DateTimeToInt64(now) - dtStart;
    if timespan > 0 then
    begin
      dtProcess := GetProcessCPU(hProcess) - dtCPUPrev;
      Label2.Caption := FloatToStr(JustFracDigit(100 * (dtProcess / timespan),0)) + ' %';
    end;
  end;
  dtStart := DateTimeToInt64(now);
  dtCPUPrev := GetProcessCPU(hProcess);
  Inc(iCount);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  timer1.Enabled := False;
  iCount:=0;
  hProcess := OpenProcess(PROCESS_QUERY_INFORMATION, false, GetPIDByProgramName(Edit1.Text));
  if hProcess > 0 then
  timer1.Enabled := True;
end;

procedure TForm1.Edit2Exit(Sender: TObject);
var
  InterVal:Integer;
begin
  InterVal:=StrToInt(Edit2.Text);
  if InterVal>0 then
  begin
    Timer1.Enabled:=false;
    Timer1.Interval:=InterVal;
    Timer1.Enabled:=True;
  end;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  edit1.Text:=ExtractFileName(ParamStr(0));
end;

end.