unit1.pas

来自「在delphi中实现windows核心编程.原书光盘代码核心编程.原书光盘代码」· PAS 代码 · 共 60 行

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }

  end;

var
  Form1: TForm1;
  CriticalSection: TRTLCriticalSection; {临界区信息}

implementation

{$R *.DFM}

function ThreadFunc(Info: Pointer): Integer; stdcall;
var
  Count: Integer;
begin
  EnterCriticalSection(CriticalSection);
  Form1.Button1.Enabled:=False;
  for Count := 0 to 10000 do
  begin
    Form1.Edit1.Text := IntToStr(Count);
  end;
  Form1.Edit1.Text := '线程结束!';
  Sleep(500);
  Form1.Button1.Enabled:=true;
  LeaveCriticalSection(CriticalSection);
  ExitThread(4);
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  ThreadId1, ThreadId2: DWORD;
begin
  Button1.Enabled:=false;
  if CriticalSection.RecursionCount<>0 then
     DeleteCriticalSection(CriticalSection);
  InitializeCriticalSection(CriticalSection);
  CreateThread(nil, 0, @ThreadFunc, nil, 0, ThreadId1);
  CreateThread(nil, 0, @ThreadFunc, nil, 0, ThreadId2);
end;

end.