XE8-indy10中TIdTCPConnection.Connected函数的源码

最新推荐文章于 2015-09-25 14:41:00 发布

阏男秀

最新推荐文章于 2015-09-25 14:41:00 发布

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分类专栏： RAD Builder XE8 文章标签： indy10 Delphi

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本文深入探讨了Indy10库中TIdTCPConnection.Connected函数的实现细节，包括其如何通过检查IOHandler来判断连接状态，并在不同场景下提供更灵活的控制方式。

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indy10中TIdTCPConnection.Connected函数的源码：

function TIdTCPConnection.Connected: Boolean;
var
  // under ARC, convert a weak reference to a strong reference before working with it
  LIOHandler: TIdIOHandler;
begin
  // Its been changed now that IOHandler is not usually nil, but can be before the initial connect
  // and also this keeps it here so the user does not have to access the IOHandler for this and
  // also to allow future control from the connection.
  LIOHandler := IOHandler;
  Result := Assigned(LIOHandler);
  if Result then begin
    Result := LIOHandler.Connected;
  end;
end;