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propagationcache.hpp

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/*******************************************************************************
 * This file is part of openWNS (open Wireless Network Simulator)
 * _____________________________________________________________________________
 *
 * Copyright (C) 2004-2007
 * Chair of Communication Networks (ComNets)
 * Kopernikusstr. 5, D-52074 Aachen, Germany
 * phone: ++49-241-80-27910,
 * fax: ++49-241-80-22242
 * email: info@openwns.org
 * www: http://www.openwns.org
 * _____________________________________________________________________________
 *
 * openWNS is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License version 2 as published by the
 * Free Software Foundation;
 *
 * openWNS 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
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#ifndef __PROPCACHE_HPP
#define __PROPCACHE_HPP

#include <RISE/misc/RISELogger.hpp>
#include <WNS/PowerRatio.hpp>
#include <WNS/Position.hpp>
#include <string>
#include <algorithm>

#include <boost/version.hpp>

// From Boost 1.38 on the unordered_map container is present
// at the same time hash_map becomes deprecated in GNU C++
#if BOOST_VERSION < 103800
    #define WNS_USE_OLD_HASH_MAP
    #include <ext/hash_map>
#else
    #include <boost/unordered_map.hpp>
#endif

namespace rise {
    class PropCacheEntry;
    class Transmitter;
    namespace receiver {
        class ReceiverInterface;
    }

    class FreqHashFunctor :
#ifdef WNS_USE_OLD_HASH_MAP
        public __gnu_cxx::hash<double const>
#else
        public boost::hash<double const>
#endif
    {
    public:
        size_t operator()(double const k) const {
            return ((size_t)(k));
        }
    };

    template<class Value>
    class FreqHash :
#ifdef WNS_USE_OLD_HASH_MAP
        public __gnu_cxx::hash_map<double const,
#else
        public boost::unordered_map<double const,
#endif
                             Value,
                             FreqHashFunctor,
                             std::equal_to<double> >
    {};

    class PropagationCache {
    public:
        PropagationCache(receiver::ReceiverInterface* r, const std::string& name);

        virtual ~PropagationCache();

        virtual wns::Ratio getLoss(Transmitter* txA, double freq)=0;

        virtual void invalidatePropagationEntries(Transmitter* t)=0;

        virtual void invalidatePropagationEntries()=0;
    protected:
        virtual void updatePropEntry(PropCacheEntry& cacheEntry,
                                     Transmitter* t,
                                     double freq);
        receiver::ReceiverInterface* receiver;
        RISELogger log;
    };
}

#endif // __PROPCACHE_HPP

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