多线程 – 在Windows 7安装中是否提供Delphi 2009等待链式遍历？

当Windows Vista是目前的操作系统时,Delphi 2009被发布.从我的经验来看,Vista中引入的大部分功能也可以在Windows 7中使用.但是,我在Delphi 2009中,通过Delphi XE安装(在Windows 7上都没有)看到这个功能.

我正在调试器的“线程”窗格中查找此功能.

我正在寻找正确的地方的等待链遍历？
>它是一个功能,真正只在Windows Vista中可用,而不是在Windows 7中？

David M提供了一个很好而明确的答案,但是我仍然没有在“线程”窗格中获得“等待链”列.这是一些代码.

主要形式：

unit Main;

interface

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

type
  TForm1 = class(TForm)
    ListBox1: TListBox;
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
    procedure ThreadDone(Sender: TObject);
  end;

var
  Form1: TForm1;
  RanGenThread: TRandomizer;

implementation

uses LoadThread;

{$R *.dfm}

{ TForm1 }

procedure TForm1.ThreadDone(Sender: TObject);
begin
  RanGenThread.Free;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
ListBox1.Sorted := True;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  Thread: TLoader;
begin
ListBox1.Items.Clear;
ListBox1.Sorted := False;
RanGenThread := TRandomizer.Create(True);
RanGenThread.ArraySize := 1000;
Thread := TLoader.Create(True);
with Thread do
begin
  RanGenThread.WaitThread := Thread;
  FreeOnTerminate := True;
  OnTerminate := ThreadDone;
  WaitForThread := RanGenThread;
  //Use Start in Delphi 2010 or later,where Resume is deprecated
  Resume;
end;
RanGenThread.Resume;
end;

initialization
  Randomize;

end.

TRandomizer：

unit RanThread;

interface

uses
  Classes,Math,SyncObjs;

type
  TRandomizer = class(TThread)
  private
    { Private declarations }
    FArraySize: Integer;
  protected
    procedure Execute; override;
  public
    WaitThread: TThread;
    RandNumbers: array of Integer;
    property ArraySize: Integer read FArraySize write FArraySize;

  end;

implementation

uses Main;

procedure TRandomizer.Execute;
var
  i: Integer;
  LowNum,HighNum: Integer;
  RandNum: Integer;
begin
if FArraySize = 0 then
  begin
    Exit;
  end;
SetLength(RandNumbers,FArraySize);
LowNum := Low(RandNumbers);
HighNum := High(RandNumbers);
//initialize the array
for i := LowNum to HighNum do
  RandNumbers[i] := -1;
// generate the random order
for i := LowNum to HighNum do
  while True do
    begin
      RandNum := RandomRange(LowNum,HighNum + 1);
      if RandNumbers[RandNum] = -1 then
      begin
        RandNumbers[RandNum] := i + 1;
        break;
      end; // if
    end; // while
    WaitThread.WaitFor;
end;

end.

TLoader：

unit LoadThread;

interface

uses
  Classes,RanThread;

type
  TLoader = class(TThread)
  private
    FWaitForThread: TRandomizer;
    procedure UpdateList;
    { Private declarations }
  protected
    procedure Execute; override;
  public
    property WaitForThread: TRandomizer
      read FWaitForThread write FWaitForThread;
  end;

implementation

uses Main;

procedure TLoader.UpdateList;
var
 i: Integer;
begin
for i := Low(FWaitForThread.RandNumbers) to
  High(FWaitForThread.RandNumbers) do
  Form1.ListBox1.Items.Add(IntToStr(FWaitForThread.RandNumbers[i]));
end;

procedure TLoader.Execute;
begin
if WaitForThread <> nil then
begin
  FWaitForThread.WaitFor;
  Synchronize(UpDateList)
end;
end;

end.

根据David M链接的等待链遍历文档,WTC可用于以下同步对象：

> ALPC
> COM
>关键部分
>互斥
> SendMessage
>等待对进程和线程的操作

我的代码等待一个线程,但它是一个TThread,而不是直接的本机线程.今天晚上,我将修改我的代码示例在等待一个Mutex时死锁,看看是否导致“等待链”列出现在“线程”窗格中.

好.最后找到时间进行下一次测试.创建一个应用程序,在启动时占用一个互斥体.创建一个使用OpenMutex获取该Mutex的句柄,然后调用WaitForsingleObject(handle,INFINITE)的工作线程. “线程”窗格中仍然没有“等待链”列.