108 lines
3.2 KiB
C++
108 lines
3.2 KiB
C++
/*
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APPCONFIG.hpp - for global initialization and configuration
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Copyright (C) Lumiera.org
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2008, Christian Thaeter <ct@pipapo.org>
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Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/** @file appconfig.hpp
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** This header is special, as it causes global system initialisation
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** to happen. On inclusion, it places static initialisation code,
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** which on first run will create the Appconfig singleton instance.
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** Additionally, the inclusion, configuration and initialisation
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** of the NoBug library is handled here. Global <i>definitions</i>
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** for NoBug are placed into the corresponding translation unit
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** appconfig.cpp"
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**
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** @see nobugcfg.h
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*/
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#ifndef CINELERRA_APPCONFIG_H
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#define CINELERRA_APPCONFIG_H
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#include <map>
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#include <string>
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#include <boost/scoped_ptr.hpp>
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#include "nobugcfg.h"
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namespace cinelerra
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{
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using std::string;
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using boost::scoped_ptr;
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/**
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* Singleton to hold inevitable global flags and constants
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* and for performing early (static) global initialization tasks.
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* Appconfig services are available already from static
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* initialsation code.
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* @warning don't use Appconfig in destuctors.
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*/
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class Appconfig
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{
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private:
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/** perform initialization on first access.
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* @see #instance() for Lifecycle */
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Appconfig ();
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Appconfig (const Appconfig&); ///< copy prohibited, not implemented
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~Appconfig () throw() {}; ///< deletion prohibited
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friend void boost::checked_delete<Appconfig>(Appconfig*);
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public:
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/** get the (single) Appconfig instance.
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* Implemented as Meyers singleton.
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* @warning don't use it in destruction code!
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*/
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static Appconfig& instance()
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{
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static scoped_ptr<Appconfig> theApp_ (0);
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if (!theApp_) theApp_.reset (new Appconfig ());
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return *theApp_;
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}
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/** access the configuation value for a given key.
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* @return empty string for unknown keys, config value else
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* @todo do we need such a facility?
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*/
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static const string & get (const string& key) throw();
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private:
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typedef std::map<string,string> Configmap;
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typedef std::auto_ptr<Configmap> PConfig;
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/** @todo <b>the following is just placeholder code!</b>
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* Appconfig <i>could</i> do such things if necessary,
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* or provide similar "allways available" services.
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*/
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PConfig configParam_;
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};
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} // namespace cinelerra
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#endif
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