include/dlvhex2/PredicateMask.h

Go to the documentation of this file.

/* dlvhex -- Answer-Set Programming with external interfaces.
 * Copyright (C) 2005-2007 Roman Schindlauer
 * Copyright (C) 2006-2015 Thomas Krennwallner
 * Copyright (C) 2009-2016 Peter Schüller
 * Copyright (C) 2011-2016 Christoph Redl
 * Copyright (C) 2015-2016 Tobias Kaminski
 * Copyright (C) 2015-2016 Antonius Weinzierl
 *
 * This file is part of dlvhex.
 *
 * dlvhex is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * dlvhex 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with dlvhex; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 */

#ifndef PREDICATEMASK_HPP_INCLUDED__27012011
#define PREDICATEMASK_HPP_INCLUDED__27012011

#include "dlvhex2/PlatformDefinitions.h"
#include "dlvhex2/fwd.h"
#include "dlvhex2/ID.h"

#include <boost/thread/mutex.hpp>

#include <set>

DLVHEX_NAMESPACE_BEGIN

class DLVHEX_EXPORT PredicateMask
{
    public:
        PredicateMask();
        ~PredicateMask();

        PredicateMask(const PredicateMask& p);
        PredicateMask& operator=(const PredicateMask& p);

        void setRegistry(RegistryPtr registry);

        void addPredicate(ID pred);

        void updateMask();

        InterpretationConstPtr mask() const
            { return maski; }

    protected:
        std::set<IDAddress> predicates;
        mutable InterpretationPtr maski;
        mutable IDAddress knownAddresses;

        boost::mutex updateMutex;
};

class DLVHEX_EXPORT ExternalAtomMask : public PredicateMask
{
    private:
        const ProgramCtx* ctx;
        const ExternalAtom* eatom;
        mutable InterpretationPtr outputAtoms;
        mutable InterpretationPtr auxInputMask;
        mutable Tuple preparedTuple;
        mutable Tuple workTuple;
    protected:
        bool matchOutputAtom(const Tuple& togatom);
    public:
        ExternalAtomMask();
        ~ExternalAtomMask();

        void setEAtom(const ProgramCtx& ctx, const ExternalAtom& eatom, const std::vector<ID>& groundidb);
        void addOutputAtoms(InterpretationConstPtr intr);
        virtual void updateMask();
        const InterpretationConstPtr getAuxInputMask() const;
};

DLVHEX_NAMESPACE_END
#endif                           // PREDICATEMASK_HPP_INCLUDED__27012011

// vim:expandtab:ts=4:sw=4:
// mode: C++
// End: