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Recv. Packets in another Thread (IdTCPClient)

 
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Reak
I post too much
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Joined: 15 May 2007
Posts: 3496
PostPosted: Sun May 18, 2008 6:02 pm    Post subject: Recv. Packets in another Thread (IdTCPClient) Reply with quote
Hello,

Hence the IdTCPClient Socket has no OnRead function I need to recvice packets in an endless loop.
But this will of course freeze my program if I would do it in the main-thread.

So I have to create another.
I never worked with threads before and wanted to try it out now!
So I used BeginThread() on the Form.OnCreate procedure.

Here is my thread-procedure:
Code:
procedure test();
var
  packet: TPacket;
begin
WaitForInputIdle(0, 10000);
Form1.Memo1.Lines.Add('a');
repeat
if not Form1.Client.Socket.Connected then exit;
    try
      Form1.Client.Socket.Recv(packet, sizeof(packet));
      case packet.header of
        01: Form1.LoginPacket(packet);
      end;
    except
      Form1.Memo1.Lines.Add('.');
    end;
until
cclose = true;
end;


But as soon as the program started I got erros.
So I googled and found out that threads are VCL-unsafe.

No I'm wondering how I could slove this problem, any ideas?
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Renkokuken
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Joined: 22 Oct 2006
Posts: 3249
PostPosted: Sun May 18, 2008 6:35 pm    Post subject: Reply with quote
Use the TThread class.
If it's not a VCL-based form, have it process recv in the idle time of the message pump. There's probably a way to have that situated in the huge list of event handlers for delphi, but I'm not so in-tune with it anymore.
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Reak
I post too much
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Joined: 15 May 2007
Posts: 3496
PostPosted: Mon May 19, 2008 7:44 am    Post subject: Reply with quote
Thanks Renko Very Happy
I've found a TUT about it and I got it working.
But if I close the client while I'm running it in debugging-mode in delphi I'm getting weird errors because of the thread. (Some random adress-violations).

Why? (Source is attached)

The Extension 'rar' was deactivated by an board admin, therefore this Attachment is not displayed.
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