//===========================================================================//
// File:	link.hh                                                             //
// Project: MUNGA           Brick: Connection Library                        //
// Contents: Interface specification of base Link                            //
//---------------------------------------------------------------------------//
//   Date    Who  Modification                                               //
// --------  ---  ---------------------------------------------------------- //
// 10/19/94  ECH  Initial coding.                                            //
// 10/20/94  JMA  Fixed style stuff.                                         //
// 10/23/94  ECH  Added greater deletion safety                              //
// 10/28/94  JMA  Made compatible with SGI CC                                //
// 11/03/94  ECH  Made compatible with BC4.0                                 //
// 12/12/94  ECH  Changed release handling											  //
//---------------------------------------------------------------------------//
// Copyright (C) 1994-1995, Virtual World Entertainment, Inc.                //
// All Rights reserved worldwide                                             //
// This unpublished sourcecode is PROPRIETARY and CONFIDENTIAL               //
//===========================================================================//

#if !defined(LINK_HPP)
#	define LINK_HPP

#	if !defined(STYLE_HPP)
#		include <style.hpp>
#	endif

	class Socket;
	class Plug;
	class PlugIterator;
   class Node;

	//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Link ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

	class Link SIGNATURED
	{
		friend class PlugIterator;

	public:
		//
		//--------------------------------------------------------------------
		//--------------------------------------------------------------------
		//
		virtual
			~Link();
		Logical
			TestInstance() const;

		//
		//--------------------------------------------------------------------
		//--------------------------------------------------------------------
		//
		Socket*
			GetSocket()
				{return socket;}
		Plug*
			GetPlug()
				{return plug;}

	protected:
		//
		//--------------------------------------------------------------------
		//--------------------------------------------------------------------
		//
		Link(
			Socket *socket,
			Plug *plug
		);

		//
		//--------------------------------------------------------------------
		//--------------------------------------------------------------------
		//
		void
			ReleaseFromPlug();

		//
		//--------------------------------------------------------------------
		//--------------------------------------------------------------------
		//
		Socket *socket;
		Plug *plug;

	private:
		//
		//--------------------------------------------------------------------
		//--------------------------------------------------------------------
		//
		void
			AddToPlug(Plug *plug);

		//
		//--------------------------------------------------------------------
		//--------------------------------------------------------------------
		//
		Link *nextLink;
		Link *prevLink;
	};

#endif