Delphi多线程测试

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unit Unit1;

interface

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

type
TForm1 = class(TForm)
    ListBox1: TListBox;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
private
    { Private declarations }
public
    { Public declarations }
end;

var
Form1: TForm1;
hMutex: THandle = 0;

implementation
uses unit2;

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
listbox1.Items.Clear;
ThreadT1.create(100, 'A');
ThreadT1.create(100, 'B');
ThreadT1.create(100, 'C');
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
hMutex := CreateMutex(nil, False, nil);
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
CloseHandle(hMutex);
end;

end.

---------------------------------------------

unit Unit2;

interface

uses
Classes, SysUtils, Windows, unit1;

type
ThreadT1 = class(TThread)
private
    FiMax: integer;
    Foption: string;
    Fi: integer;
    { Private declarations }
protected
    procedure Execute; override;
    procedure AddItem();
public
    constructor create(iMax: integer; option: string);
end;

ThreadT2 = class(TThread)
private
    FiMax: integer;
    Foption: string;
    Fi: integer;
    { Private declarations }
protected
    procedure Execute; override;
    procedure AddItem();
public
    constructor create(iMax: integer; option: string);
end;

implementation

{ ThreadT1 }

procedure ThreadT1.AddItem;
begin
inc(Fi);
Form1.ListBox1.Items.Add(format('item%s %d', [Foption, Fi]));
end;

constructor ThreadT1.create(iMax: integer; option: string);
begin
FiMax := iMax;
Foption := option;
FreeOnTerminate := true;
inherited create(false);
end;

procedure ThreadT1.Execute;
var
i: integer;
begin
if WaitForSingleObject(hMutex, INFINITE) = WAIT_OBJECT_0 then
    for i := 0 to fimax - 1 do
    begin
      sleep(50);
      Synchronize(AddItem)
    end;
ReleaseMutex(hMutex);
end;

{ ThreadT2 }

procedure ThreadT2.AddItem;
begin
inc(Fi);
Form1.ListBox1.Items.Add(format('item%s %d', [Foption, Fi]));
end;

constructor ThreadT2.create(iMax: integer; option: string);
begin
FiMax := iMax;
Foption := option;
FreeOnTerminate := true;
inherited create(false);
end;

procedure ThreadT2.Execute;
var
i: integer;
begin
for i := 0 to FiMax - 1 do
begin
sleep(50);
Synchronize(AddItem)
end;
end;

end.