110 lines
2.4 KiB
ObjectPascal
110 lines
2.4 KiB
ObjectPascal
{******************************************************************
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JEDI-VCL Demo
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Copyright (C) 2002 Project JEDI
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Original author:
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Contributor(s):
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You may retrieve the latest version of this file at the JEDI-JVCL
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home page, located at http://jvcl.sourceforge.net
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The contents of this file are used with permission, subject to
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the Mozilla Public License Version 1.1 (the "License"); you may
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not use this file except in compliance with the License. You may
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obtain a copy of the License at
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http://www.mozilla.org/MPL/MPL-1_1Final.html
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Software distributed under the License is distributed on an
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"AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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implied. See the License for the specific language governing
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rights and limitations under the License.
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******************************************************************}
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unit main;
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interface
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uses
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{$IFDEF LINUX}
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libc, QForms, QStdCtrls, QControls, QGraphics, QDialogs, QExtCtrls,
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{$ELSE}
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Windows, Graphics, Controls, Forms, Messages, Dialogs, StdCtrls,
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{$ENDIF}
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SysUtils, Classes, JvUIB, SyncObjs, JvComponent;
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type
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TForm1 = class(TForm)
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DataBase: TJvUIBDataBase;
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Button1: TButton;
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Transaction: TJvUIBTransaction;
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procedure Button1Click(Sender: TObject);
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private
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{ Déclarations privées }
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public
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{ Déclarations publiques }
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end;
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TMyThread = class(TThread)
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public
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procedure Execute; override;
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destructor destroy; override;
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end;
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var
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Form1: TForm1;
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implementation
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{$R *.dfm}
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procedure TForm1.Button1Click(Sender: TObject);
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var
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i: integer;
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begin
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for i := 0 to 49 do
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TMyThread.Create(False);
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end;
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var
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x: integer = 0;
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{ TMyThread }
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destructor TMyThread.destroy;
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begin
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beep;
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inherited;
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end;
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procedure TMyThread.Execute;
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var
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Query: TJvUIBQuery;
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begin
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FreeOnTerminate := true;
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//Form1.DataBase.Lock; //simulate single thread
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try
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Query := TJvUIBQuery.Create(nil);
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try
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Query.Transaction := Form1.Transaction;
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Query.FetchBlobs := True;
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Query.SQL.Text := 'select * from project';
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Query.Open;
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while not Query.EOF do
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begin
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Query.Next;
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Sleep(10); // simulate activity
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end;
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finally
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Query.Free;
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end;
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finally
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//Form1.DataBase.UnLock; //simulate single thread
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end;
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end;
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end.
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