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/* -*- C++ -*- */
/**
* @file EC_Conjunction_Filter.h
*
* $Id$
*
* @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 "EC_Filter.h"
#include "event_export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
/**
* @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.
*
* <H2>Memory Management</H2>
* It assumes ownership of the children.
*/
class TAO_RTEvent_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 (void);
// = The TAO_EC_Filter methods, please check the documentation in
// TAO_EC_Filter.
virtual ChildrenIterator begin (void) const;
virtual ChildrenIterator end (void) const;
virtual int size (void) const;
virtual int filter (const RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info
ACE_ENV_ARG_DECL);
virtual int filter_nocopy (RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info
ACE_ENV_ARG_DECL);
virtual void push (const RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info
ACE_ENV_ARG_DECL);
virtual void push_nocopy (RtecEventComm::EventSet& event,
TAO_EC_QOS_Info& qos_info
ACE_ENV_ARG_DECL);
virtual void clear (void);
virtual CORBA::ULong max_event_size (void) 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
ACE_ENV_ARG_DECL);
typedef unsigned int Word;
private:
/// Determine if all the children have received their events.
int all_received (void) const;
ACE_UNIMPLEMENTED_FUNC (TAO_EC_Conjunction_Filter
(const TAO_EC_Conjunction_Filter&))
ACE_UNIMPLEMENTED_FUNC (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_;
};
#if defined (__ACE_INLINE__)
#include "EC_Conjunction_Filter.i"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* TAO_EC_CONJUNCTION_FILTER_H */
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