101 lines
2.4 KiB
C++
101 lines
2.4 KiB
C++
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/*
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APPCONFIG.hpp - for global initialization and configuration
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Copyright (C) CinelerraCV
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2007, Christian Thaeter <ct@pipapo.org>
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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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#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 <memory>
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using std::string;
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using std::auto_ptr;
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#include <nobug.h>
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NOBUG_DECLARE_FLAG(config);
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namespace cinelerra
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{
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/**
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* Singleton to hold inevitable global flags and constants
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* and for performing erarly (static) global initialization tasks.
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*/
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class Appconfig
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{
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private:
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/** holds the single instance and triggers initialization */
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static auto_ptr<Appconfig> theApp_;
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/** perform initialization on first access.
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* A call is placed in static initialization code
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* included in cinelerra.h; thus it will happen
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* ubiquitous very early.
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*/
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Appconfig () ;
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public:
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static Appconfig& instance()
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{
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if (!theApp_.get()) 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, else the corresponding configuration value
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*/
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static 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 auto_ptr<Configmap> PConfig;
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/** <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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*/
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PConfig configParam_;
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};
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namespace
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{
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/** generate "magic code" causing early static initialization */
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Appconfig* init (&Appconfig::instance ());
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}
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} // namespace cinelerra
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#endif
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