/home/raskolnikov/dev/psynth/trunk/src/psynth/graph/node_param.hpp

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/***************************************************************************
 *                                                                         *
 *   PSYCHOSYNTH                                                           *
 *   ===========                                                           *
 *                                                                         *
 *   Copyright (C) Juan Pedro Bolivar Puente 2008                          *
 *                                                                         *
 *   This program 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.                                   *
 *                                                                         *
 *   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>. *
 *                                                                         *
 ***************************************************************************/

#ifndef PSYNTH_OBJPARAM
#define PSYNTH_OBJPARAM

#include <mutex>

#include <boost/function.hpp>
#include <string>

namespace psynth
{
namespace graph
{

class node_param
{
public:
    typedef boost::function <void (node_param&)> event;

    enum type
    {
        NONE = -1,
        INT,       /* int */
        FLOAT,     /* float */
        STRING,    /* std::string */
        VECTOR2F,  /* Vector2f */
        TYPES
    };

    node_param () :
        m_type(NONE),
        m_changed(false),
        m_src(NULL),
        m_dest(NULL)
        {}

    node_param (const node_param& obj) :
        m_type(NONE),
        m_changed(false) {
        configure(obj.m_id, obj.m_name, obj.m_type, obj.m_dest, obj.m_event);
    }
    
    ~node_param () {
        clear();
    }

    node_param& operator= (const node_param& obj) {
        if (this != &obj)
            configure(obj.m_id, obj.m_name, obj.m_type, obj.m_dest, obj.m_event);

        return *this;
    }
    
    int get_id () const {
        return m_id;
    }

    const std::string& get_name () const {
        return m_name;
    }
        
    int type() const {
        return m_type;
    };
        
    template <typename T>
    void set (const T& d) {
        {
            std::unique_lock<std::mutex> lock (m_mutex);
            m_changed = true;
            *static_cast<T*>(m_src) = d;
        }
        if (!m_event.empty()) m_event(*this);
    }

    template <typename T>
    void get (T& d) const {
        m_mutex.lock ();
        d = *static_cast<T*>(m_src);
        m_mutex.unlock ();
    }

private:
    friend class node;
        
    mutable std::mutex m_mutex;

    std::string m_name;
    int m_id;
    int m_type;
    bool m_changed;
    event m_event;
    void* m_src;
    void* m_dest;
    
    void clear ();
    void configure (int id, std::string name, int type, void* dest);
    void configure (int id, std::string name, int type, void* dest, event ev);

    void update_in ();
    void update_out ();
};

} /* namespace graph */
} /* namespace psynth */

#endif /* PSYNTH_OBJPARAM */