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// -*- C++ -*-
/**
* @file EC_Bitmask_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_BITMASK_FILTER_H
#define TAO_EC_BITMASK_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_Bitmask_Filter
*
* @brief The bitmask filter.
*
* This filter quickly rejects events that do not match a given
* bitmask.
* If the event is not rejected based on the mask then the child
* is consulted to finally accept or reject the event.
* When composed with the Null_Filter it accepts any events that
* satisfy:
* (event.header.type & type_mask) != 0
* && (event.header.type & source_mask) != 0
*
* <H2>Memory Management</H2>
* It assumes ownership of the child.
*/
class TAO_RTEvent_Serv_Export TAO_EC_Bitmask_Filter : public TAO_EC_Filter
{
public:
/**
* Constructor.
* Events that do not satisfy:
*
* (e.header.source & source_mask) != 0 &&
* (e.header.type & type_mask) != 0
*
* are immediately rejected, other events are recursively tested
* using the child node.
* It assumes ownership of the child.
*/
TAO_EC_Bitmask_Filter (CORBA::ULong source_mask,
CORBA::ULong type_mask,
TAO_EC_Filter* child);
/// Destructor
virtual ~TAO_EC_Bitmask_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);
private:
TAO_EC_Bitmask_Filter (const TAO_EC_Bitmask_Filter&);
TAO_EC_Bitmask_Filter& operator= (const TAO_EC_Bitmask_Filter&);
private:
/// The bitmasks
CORBA::ULong source_mask_;
CORBA::ULong type_mask_;
/// The children
TAO_EC_Filter* child_;
};
TAO_END_VERSIONED_NAMESPACE_DECL
#include /**/ "ace/post.h"
#endif /* TAO_EC_BITMASK_FILTER_H */
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