channel_element_base.hpp

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/* 
 *  channel_element_base.hpp - micros base channel element
 *  Copyright (C) 2015 Zaile Jiang
 *  
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *  
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
#ifndef MICROSRTT_CHANNEL_BASE_HPP
#define MICROSRTT_CHANNEL_BASE_HPP

#include <utility>
#include <boost/intrusive_ptr.hpp>
#include <boost/call_traits.hpp>
#include "micros_rtt/oro/oro_arch.h"

namespace micros_rtt
{
  
class ChannelElementBase
{
public:
  typedef boost::intrusive_ptr<ChannelElementBase> shared_ptr;

private:
  oro_atomic_t refcount;
  friend void intrusive_ptr_add_ref( ChannelElementBase* e );
  friend void intrusive_ptr_release( ChannelElementBase* e );

  shared_ptr input;
  shared_ptr output;
  
protected:
  void ref();
  void deref();

public:
  ChannelElementBase();
  virtual ~ChannelElementBase();

  void removeInput();
  ChannelElementBase::shared_ptr getInput();

  ChannelElementBase::shared_ptr getInputEndPoint();


  ChannelElementBase::shared_ptr getOutput();

  ChannelElementBase::shared_ptr getOutputEndPoint();

  void setOutput(shared_ptr output);

  virtual bool signal();

  virtual bool inputReady();

  virtual void clear();

  virtual void disconnect(bool forward);

};

void intrusive_ptr_add_ref( ChannelElementBase* e );
void intrusive_ptr_release( ChannelElementBase* e );

}

#endif