ucpuspd.pas

来自「精彩编程百例51～75 其中有 cpu速度测试 检测声卡 查询内存信息 图像处理」· PAS 代码 · 共 99 行

unit UCPUSpd;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  ComCtrls, StdCtrls, Buttons;

type
  TFormCPUSpeed = class(TForm)
    BitBtnStart: TBitBtn;
    BitBtnStop: TBitBtn;
    Label1: TLabel;
    Edit1: TEdit;
    procedure BitBtnStartClick(Sender: TObject);
    procedure BitBtnStopClick(Sender: TObject);
  private
    { Private declarations }
    Stop: Boolean;
  public
    { Public declarations }
  end;

var
  FormCPUSpeed: TFormCPUSpeed;

implementation

{$R *.DFM}

function GetCPUSpeed: Double;
const
  DelayTime = 500;
//定义延时时间
var
  TimerHi, TimerLo: DWORD;
  PriorityClass, Priority: Integer;
begin
  PriorityClass := GetPriorityClass(GetCurrentProcess);
  //取得并保存当前进程的优先权
  Priority := GetThreadPriority(GetCurrentThread);
  //取得并保存当前线程的优先权

  SetPriorityClass(GetCurrentProcess, REALTIME_PRIORITY_CLASS);
  //设置当前进程为最高级别，即实时级
  SetThreadPriority(GetCurrentThread, THREAD_PRIORITY_TIME_CRITICAL);
  //设置当前线程为最高级别，即严重级别
  Sleep(10);
  //等待0.01秒
  asm
    dw 310Fh
    mov TimerLo, eax
    mov TimerHi, edx
  end;
  Sleep(DelayTime);
  asm         //测试cpu运算过程
    dw 310Fh
    sub eax, TimerLo
    sbb edx, TimerHi
    mov TimerLo, eax
    mov TimerHi, edx
  end;

  SetThreadPriority(GetCurrentThread, Priority);
  //恢复当前线程为初始状态
  SetPriorityClass(GetCurrentProcess, PriorityClass);
  //恢复当前进程为初始状态
  Result := TimerLo / (1000.0 * DelayTime);
  //根据测试结果，运算得出cpu主频
end;

procedure TFormCPUSpeed.BitBtnStartClick(Sender: TObject);
begin
  BitBtnStart.Enabled := False;
  BitBtnStop.Enabled := True;

  Stop := False;
  while not Stop do
  begin
    Edit1.text := Format('CPU speed:  %f MHz', [GetCPUSpeed]);
    //显示测试结果

    Application.ProcessMessages;
  end;

  BitBtnStart.Enabled := True;
  BitBtnStop.Enabled := False;
end;

procedure TFormCPUSpeed.BitBtnStopClick(Sender: TObject);
//中止测试
begin
  showmessage('8_×，谢谢使用');
  Stop := True;
  edit1.text:='';
end;

end.