src/Utils/Singleton.hh

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/***********************************************************
* This file is part of Freya
* - A free MPD Gtk3 MPD Client -
*
* Authors: Christopher Pahl, Christoph Piechula,
*          Eduard Schneider
*
* Copyright (C) [2011-2012]
* Hosted at: https://github.com/studentkittens/Freya
*
*              __..--''``---....___   _..._    __
*    /// //_.-'    .-/";  `        ``<._  ``.''_ `. / // /
*   ///_.-' _..--.'_                        `( ) ) // //
*   / (_..-' // (< _     ;_..__               ; `' / ///
*    / // // //  `-._,_)' // / ``--...____..-' /// / //
*  Ascii-Art by Felix Lee <flee@cse.psu.edu>
*
* Freya 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.
*
* Freya 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 Freya. If not, see <http://www.gnu.org/licenses/>.
**************************************************************/
#ifndef FREYA_SINGLETON_GUARD
#define FREYA_SINGLETON_GUARD

/* Singleton macro. Taken from the C-Wikibooks pages:
 * http://de.wikibooks.org/wiki/C++-Programmierung:_Entwurfsmuster:_Singleton
 */

#define DEF_SINGLETON( NAME )    \
 public:                         \
    static NAME& instance()      \
    {                            \
       static NAME _instance;    \
       return _instance;         \
    }                            \
 private:                        \
    NAME();                      \
    NAME(const NAME&);

#endif