fwdtable.h

// -*- C++ -*-
//
//  This file is part of Siena, a wide-area event notification system.
//  See http://www.inf.usi.ch/carzaniga/siena/
//
//  Authors: Antonio Carzaniga
//  See the file AUTHORS for full details. 
//
//  Copyright (C) 2001-2003 University of Colorado
//
//  Siena 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 3 of the License, or
//  (at your option) any later version.
//  
//  Siena 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 Siena.  If not, see <http://www.gnu.org/licenses/>.
//
#ifndef SIENA_FWDTABLE_H
#define SIENA_FWDTABLE_H

#include <cstddef>              // for size_t

#include <siena/exceptions.h>
#include <siena/forwarding.h>
#include <siena/allocator.h>
#include <siena/atable.h>

namespace siena {

class Interface;
class Selectivity;
class Attribute;
class Constraint;
class Filter;
class CProcessor;

class FwdTable : public ForwardingTable {
public:
    FwdTable();

    virtual ~FwdTable();

    virtual void ifconfig(if_t, const predicate &);
    virtual void consolidate();

    virtual void match(const message &, MatchHandler &) const;
    virtual void match(const message &, MatchMessageHandler &) const;

    virtual void clear();
    virtual void clear_recycle();

    virtual size_t allocated_bytesize() const;
    virtual size_t bytesize() const;

    void set_preprocess_rounds(unsigned int);

    unsigned int get_preprocess_rounds() const;

private:
    FTAllocator         memory;

    FTAllocator         tmp_memory;

    ifid_t              if_count;

    unsigned int        f_count;

    unsigned int        preprocess_rounds;

    ATable              attributes;

    Selectivity *       selectivity_first;

    Selectivity *       selectivity_last;

    Selectivity *       new_selectivity(const string_t &, ifid_t);

    void                add_to_selectivity(Selectivity *, ifid_t);

    Attribute *         get_attribute(const string_t & name);

    void                connect(Constraint *, Filter *, const string_t &);

    struct attr_descr_link {
        Attribute * a;
        attr_descr_link * next;
    };
    attr_descr_link * consolidate_list;
};

} // end namespace siena

#endif