// -*- C++ -*-
/**
* @file EC_Conjunction_Filter.h
*
* @author Carlos O'Ryan (coryan@cs.wustl.edu)
*
* Based on previous work by Tim Harrison (harrison@cs.wustl.edu) and
* other members of the DOC group. More details can be found in:
*
* http://doc.ece.uci.edu/~coryan/EC/index.html
*/
#ifndef TAO_EC_CONJUNCTION_FILTER_H
#define TAO_EC_CONJUNCTION_FILTER_H
#include /**/ "ace/pre.h"
#include "orbsvcs/Event/EC_Filter.h"
#include /**/ "orbsvcs/Event/event_serv_export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
/**
* @class TAO_EC_Conjunction_Filter
*
* @brief The conjunction filter.
*
* This filter waits until each one of its children has accepted
* at least one event. Only in that case it accepts and publishes
* the sequence formed by all the children events.
*
*
Memory Management
* It assumes ownership of the children.
*/
class TAO_RTEvent_Serv_Export TAO_EC_Conjunction_Filter : public TAO_EC_Filter
{
public:
/// Constructor. It assumes ownership of both the array and the
/// children.
TAO_EC_Conjunction_Filter (TAO_EC_Filter* children[],
size_t n);
/// Destructor
virtual ~TAO_EC_Conjunction_Filter ();
// = The TAO_EC_Filter methods, please check the documentation in
// TAO_EC_Filter.
virtual ChildrenIterator begin () const;
virtual ChildrenIterator end () const;
virtual int size () const;
virtual int filter (const RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info);
virtual int filter_nocopy (RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info);
virtual void push (const RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info);
virtual void push_nocopy (RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info);
virtual void clear ();
virtual CORBA::ULong max_event_size () const;
virtual int can_match (const RtecEventComm::EventHeader& header) const;
virtual int add_dependencies (const RtecEventComm::EventHeader& header,
const TAO_EC_QOS_Info &qos_info);
typedef unsigned int Word;
private:
/// Determine if all the children have received their events.
int all_received () const;
TAO_EC_Conjunction_Filter (const TAO_EC_Conjunction_Filter&);
TAO_EC_Conjunction_Filter& operator= (const TAO_EC_Conjunction_Filter&);
private:
/// The children
TAO_EC_Filter** children_;
/// The number of children.
size_t n_;
/// The event we send up (once all the children have pushed theirs).
RtecEventComm::EventSet event_;
/**
* The number of words in the bit vector
*/
size_t nwords_;
/**
* The bit vector to keep track of the children that have received
* their events.
*/
Word* bitvec_;
/// The current child in the iteration, used in the push() method...
ChildrenIterator current_child_;
};
TAO_END_VERSIONED_NAMESPACE_DECL
#include /**/ "ace/post.h"
#endif /* TAO_EC_CONJUNCTION_FILTER_H */