signalslot.hpp

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/*
 * Copyright 2008,2009,2010,2011,2012 Stephan Ossowski, Korbinian Schneeberger,
 * Felix Ott, Joerg Hagmann, Alf Scotland, Sebastian Bender
 * 
 * This file is part of SHORE.
 * 
 * SHORE 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.
 * 
 * SHORE 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 SHORE.  If not, see <http://www.gnu.org/licenses/>.
 */


#ifndef SHORE_PROCESSING_SIGNALSLOT_HPP__
#define SHORE_PROCESSING_SIGNALSLOT_HPP__

#include <map>
#include <set>

#include <boost/function.hpp>

namespace shore {

template<typename T> class signal;
template<typename T> class slot;

template<typename T>
struct sig_spec
{
        typedef boost::function<void (T)> functor_t;

        class emitter
        {
         private:

                friend class signal<T>;
                typedef std::map<slot<T>*,functor_t> map_t;
                const map_t& map;

                emitter(const map_t& m): map(m) {}

         public:

                void operator()(T value) const;
        };
};

template<>
struct sig_spec<void>
{
        typedef boost::function<void ()> functor_t;

        class emitter
        {
         private:

                friend class signal<void>;
                typedef std::map<slot<void>*,functor_t> map_t;
                const map_t& map;

                emitter(const map_t& m): map(m) {}

         public:

                void operator()() const;
        };
};

template<typename T>
class slot
{
 private:

        friend class signal<T>;

        typedef typename sig_spec<T>::functor_t functor_t;

        typedef signal<T> signal_t;
        typedef std::set<signal_t*> sigset_t;

        functor_t m_func;
        sigset_t m_signals;

 public:

        slot(functor_t);

        ~slot();

        void disconnect_all();

        slot(const slot& bp);

        slot& operator=(const slot& bp);

        void copy_connections(const slot& bp);

        size_t nsignals() const;
};

template<typename T>
class signal
{
 private:

        friend class slot<T>;
        
        typedef typename sig_spec<T>::functor_t functor_t;
        typedef std::map<slot<T>*,functor_t> slotmap_t;

        typedef typename sig_spec<T>::emitter emitter_type;

        slotmap_t m_slots;

 public:

        const emitter_type emit;


        signal();

        ~signal();

        void disconnect_all();

        signal(const signal& bp);

        signal& operator=(const signal& bp);

        void connect(slot<T>& s);

        void disconnect(slot<T>& s);

        size_t nslots() const;
};

} //namespace shore

#include "signalslot.t.hpp"

#endif // SHORE_PROCESSING_SIGNALSLOT_HPP__