Delphi ActiveX

Move a Connection into a Socket Set

Demonstrates Socket.TakeSocket, which moves a connection into a newly created member of this object's socket set. After one or more calls, the object acts as a set of sockets.

Background. A socket set groups multiple connections so they can be monitored together with the SelectForReading and SelectForWriting methods. After success, the source socket holds no connection.

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var
success: Integer;
listenSock: TChilkatSocket;
connectedSock: TChilkatSocket;
socketSet: TChilkatSocket;

begin
success := 0;

listenSock := TChilkatSocket.Create(Self);

success := listenSock.BindAndListen(5000,25);
if (success = 0) then
  begin
    Memo1.Lines.Add(listenSock.LastErrorText);
    Exit;
  end;

connectedSock := TChilkatSocket.Create(Self);
success := listenSock.AcceptNext(20000,connectedSock.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(listenSock.LastErrorText);
    Exit;
  end;

//  Move the connection out of connectedSock and into a newly created member of this object's socket
//  set.  After one or more such calls, socketSet acts as a set of connected sockets (useful with the
//  SelectForReading / SelectForWriting methods).  After success, connectedSock holds no connection.
socketSet := TChilkatSocket.Create(Self);
success := socketSet.TakeSocket(connectedSock.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(socketSet.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('Connection added to the socket set.');