Delphi线程变量和Word((@Text)^) := SizeOf(Text)

---------------D7

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-----------------------Unit

unit Unit1;

interface

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

type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
Button3: TButton;
Memo1: TMemo;
Button4: TButton;
Button5: TButton;
ADOQuery1: TADOQuery;
ADOConnection1: TADOConnection;
Button6: TButton;
Panel1: TPanel;
Button7: TButton;
Button8: TButton;
Button9: TButton;
Button10: TButton;
Button11: TButton;
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
procedure Button4Click(Sender: TObject);
procedure Button5Click(Sender: TObject);
procedure Button6Click(Sender: TObject);
procedure Button7Click(Sender: TObject);
procedure Button8Click(Sender: TObject);
procedure Button9Click(Sender: TObject);
procedure Button10Click(Sender: TObject);
procedure Button11Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
TMyThread=class(TThread)
private
FName:String;
protected
procedure execute;override;
public
property Name:string read FName write FName;
end;
TMyThread01=class(TThread)
private
FName:String;
protected
procedure execute;override;
public
property Name:string read FName write FName;
end;
var
Form1: TForm1;
MyThread_01:TMyThread;
MyThread_02:TMyThread;

MyThread01_001:TMyThread01;
MyThread01_002:TMyThread01;
MyThread01_003:TMyThread01;
MyThread01_004:TMyThread01;
MyThread01_005:TMyThread01;
MyThread01_006:TMyThread01;
implementation
var
VV:Integer;
vList:TList;
threadvar
sss:integer;

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
lpCreationTime, lpExitTime, lpKernelTime, lpUserTime: TFileTime;
begin
GetThreadTimes( MyThread_01.Handle,lpCreationTime, lpExitTime, lpKernelTime, lpUserTime) ;
Memo1.Lines.Add('lpCreationTime'+IntToStr(lpCreationTime.dwHighDateTime -lpCreationTime.dwLowDateTime )+'毫秒');
Memo1.Lines.Add('lpExitTime'+IntToStr(lpExitTime.dwHighDateTime -lpExitTime.dwLowDateTime )+'毫秒');
Memo1.Lines.Add('lpKernelTime'+IntToStr(lpKernelTime.dwHighDateTime -lpKernelTime.dwLowDateTime )+'毫秒');
Memo1.Lines.Add('UserTime'+IntToStr(lpUserTime.dwHighDateTime -lpUserTime.dwLowDateTime )+'毫秒');
end;

{ TMyThread }

procedure TMyThread.execute;
begin
sss:=Self.Handle;
vv:=Self.Handle;
//inherited;
while not Terminated do
begin
Sleep(1000);
Form1.Memo1.Lines.Add(Self.name +' sss '+IntToStr(sss)+'vv'+inttostr(vv));
end;

end;

procedure TForm1.FormCreate(Sender: TObject);
begin
MyThread_01:=TMyThread.Create(True);
MyThread_01.Name:='MyThread_01';
MyThread_02:=TMyThread.Create(True);
MyThread_02.Name:='MyThread_02';
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
MyThread_01.Resume;
MyThread_02.Resume;
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
MyThread_01.Suspend;
MyThread_02.Suspend;
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
ShowMessage(' sss '+IntToStr(sss)+'vv'+inttostr(vv));
end;

procedure TForm1.Button5Click(Sender: TObject);
var
sssss:TStrings;
begin
sssss:=TStringList.Create;
//
ShowMessage(IntToStr(Memo1.Lines.count)+Memo1.Lines[100]+sssss.Strings[8]);
vList.Items[2];
end;

// Word((@Text)^) := SizeOf(Text);的意思
procedure TForm1.Button6Click(Sender: TObject);
var Text :array[0..1023] of char;
PW :^Word;
I:word;
begin
//text := 'afd';
PW := @Text;
PW^ := Sizeof(Text);//取长度
PW := @Text;
I := PW^;
//ShowMessage(IntToStr(Longint(@Text)));
//showMessage(intToStr(i));//1024
//showmessage(text[0]);
//showmessage(text[1]);
//ShowMessage(text);
end;

procedure TForm1.Button7Click(Sender: TObject);
var
ado1:TADOQuery;
begin
ado1:=ADOQuery1 ;
ado1.Free;
end;

procedure TForm1.Button8Click(Sender: TObject);
begin
ShowMessage(ADOQuery1.Name );
end;

{ TMyThread01 }

procedure TMyThread01.execute;
begin
//inherited;

while not Terminated do
begin
Inc(sss);
Form1.Memo1.Lines.Add(self.name+'_'+inttostr(sss));
end;
end;

procedure TForm1.Button9Click(Sender: TObject);
begin
if Assigned(MyThread01_001)=False then
begin
MyThread01_001:=TMyThread01.Create(True);
MyThread01_002:=TMyThread01.Create(True);
MyThread01_003:=TMyThread01.Create(True);
MyThread01_004:=TMyThread01.Create(True);
MyThread01_005:=TMyThread01.Create(True);
MyThread01_006:=TMyThread01.Create(True);
MyThread01_001.Name:='MyThread01_001';
MyThread01_002.Name:='MyThread01_002';
MyThread01_003.Name:='MyThread01_003';
MyThread01_004.Name:='MyThread01_004';
MyThread01_005.Name:='MyThread01_005';
MyThread01_006.Name:='MyThread01_006';
end;
end;

procedure TForm1.Button10Click(Sender: TObject);
begin
MyThread01_001.Resume ;
MyThread01_002.Resume ;
MyThread01_003.Resume ;
MyThread01_004.Resume ;
MyThread01_005.Resume ;
MyThread01_006.Resume ;
end;

procedure TForm1.Button11Click(Sender: TObject);
begin
MyThread01_001.Suspend ;
MyThread01_002.Suspend ;
MyThread01_003.Suspend ;
MyThread01_004.Suspend ;
MyThread01_005.Suspend ;
MyThread01_006.Suspend ;
end;

end.

补充:
PW^ := Sizeof(Text);
SizeOf(Text)为$0400
存在PW指向的第一个WORD中,高位字节存在高地址
而Text的内容被破坏
而调用
showMessage(intToStr(i))
由于i为word，当调用IntToStr(i)时会产生MOVZX指令进行零扩充，所以得出来的是$00000400
即1024

----------------------Unit结束

--------------------Form

object Form1: TForm1
Left = 626
Top = 222
Width = 624
Height = 675
Caption = 'Form1'
Color = clBtnFace
Font.Charset = DEFAULT_CHARSET
Font.Color = clWindowText
Font.Height = -11
Font.Name = 'MS Sans Serif'
Font.Style = []
OldCreateOrder = False
OnCreate = FormCreate
PixelsPerInch = 96
TextHeight = 13
object Button1: TButton
Left = 16
Top = 328
Width = 121
Height = 25
Caption = 'B1_显示线程时间'
TabOrder = 0
OnClick = Button1Click
end
object Button2: TButton
Left = 32
Top = 232
Width = 89
Height = 25
Caption = 'Button2_开始'
TabOrder = 1
OnClick = Button2Click
end
object Button3: TButton
Left = 32
Top = 280
Width = 75
Height = 25
Caption = 'Button3_暂停'
TabOrder = 2
OnClick = Button3Click
end
object Memo1: TMemo
Left = 16
Top = 8
Width = 289
Height = 137
ImeName = '中文(简体) - 搜狗拼音输入法'
Lines.Strings = (
'Memo1')
ScrollBars = ssBoth
TabOrder = 3
end
object Button4: TButton
Left = 16
Top = 360
Width = 161
Height = 25
Caption = 'B4_全局变量和线程变量'
TabOrder = 4
OnClick = Button4Click
end
object Button5: TButton
Left = 192
Top = 336
Width = 201
Height = 25
Caption = 'List和memo的下标越界问题_B5'
TabOrder = 5
OnClick = Button5Click
end
object Button6: TButton
Left = 424
Top = 336
Width = 137
Height = 25
Caption = 'B6_有意思的转换赋值'
TabOrder = 6
OnClick = Button6Click
end
object Panel1: TPanel
Left = 304
Top = 224
Width = 185
Height = 41
Caption = 'Panel1'
TabOrder = 7
end
object Button7: TButton
Left = 200
Top = 288
Width = 115
Height = 25
Caption = 'B7_赋值并释放'
TabOrder = 8
OnClick = Button7Click
end
object Button8: TButton
Left = 368
Top = 288
Width = 169
Height = 25
Caption = 'B8_显示ADO名字'
TabOrder = 9
OnClick = Button8Click
end
object Button9: TButton
Left = 152
Top = 560
Width = 113
Height = 25
Caption = 'B9_建立线程'
TabOrder = 10
OnClick = Button9Click
end
object Button10: TButton
Left = 280
Top = 560
Width = 81
Height = 25
Caption = 'B_10开始'
TabOrder = 11
OnClick = Button10Click
end
object Button11: TButton
Left = 376
Top = 560
Width = 75
Height = 25
Caption = 'B_11暂停'
TabOrder = 12
OnClick = Button11Click
end
object ADOQuery1: TADOQuery
Parameters = <>
Left = 352
Top = 248
end
object ADOConnection1: TADOConnection
Left = 408
Top = 184
end
end

--------------------Form结束