Move a Connection into a Socket Set

See more Socket/SSL/TLS Examples

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.

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Socket;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  listenSock: TSocket;
  connectedSock: TSocket;
  socketSet: TSocket;

begin
  success := False;

  listenSock := TSocket.Create;

  success := listenSock.BindAndListen(5000,25);
  if (success = False) then
    begin
      WriteLn(listenSock.LastErrorText);
      Exit;
    end;

  connectedSock := TSocket.Create;
  success := listenSock.AcceptNext(20000,connectedSock);
  if (success = False) then
    begin
      WriteLn(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 := TSocket.Create;
  success := socketSet.TakeSocket(connectedSock);
  if (success = False) then
    begin
      WriteLn(socketSet.LastErrorText);
      Exit;
    end;
  WriteLn('Connection added to the socket set.');


  listenSock.Free;
  connectedSock.Free;
  socketSet.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.