(Delphi DLL) Example: Socket.DupSocket method

See more Socket/SSL/TLS Examples

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Socket;

...

procedure TForm1.Button1Click(Sender: TObject);
var
socket: HCkSocket;
success: Boolean;
socket_for_sending: HCkSocket;
socket_for_monitor: HCkSocket;

begin
socket := CkSocket_Create();
success := CkSocket_Connect(socket,'example.com',443,True,5000);

// ...
// ...

// Duplicate the socket to share the same connection across threads.
// In a multithreaded application, each thread should use its own socket object. For example:

// - The main thread can use the original socket for reading.
// - A secondary thread can use a duplicate for writing.
// - Another thread can use a separate duplicate to monitor the connection status.

socket_for_sending := CkSocket_Create();
success := CkSocket_DupSocket(socket,socket_for_sending);
if (success = False) then
  begin
    Memo1.Lines.Add(CkSocket__lastErrorText(socket));
    Exit;
  end;

socket_for_monitor := CkSocket_Create();
success := CkSocket_DupSocket(socket,socket_for_monitor);
if (success = False) then
  begin
    Memo1.Lines.Add(CkSocket__lastErrorText(socket));
    Exit;
  end;

// All three socket objects: socket, socket_for_sending, and socket_for_monitor share the same underlying connection.

CkSocket_Dispose(socket);
CkSocket_Dispose(socket_for_sending);
CkSocket_Dispose(socket_for_monitor);

end;