DynamicLoader.h

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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4; -*-
// vim: set shiftwidth=4 softtabstop=4 expandtab:
/*
 ********************************************************************
 ** NIDAS: NCAR In-situ Data Acquistion Software
 **
 ** 2004, Copyright University Corporation for Atmospheric Research
 **
 ** 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 2 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.
 **
 ** The LICENSE.txt file accompanying this software contains
 ** a copy of the GNU General Public License. If it is not found,
 ** write to the Free Software Foundation, Inc.,
 ** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 **
 ********************************************************************
*/

#ifndef NIDAS_CORE_DYNAMIC_LOADER_H
#define NIDAS_CORE_DYNAMIC_LOADER_H

#include <nidas/util/ThreadSupport.h>
#include <nidas/util/Exception.h>

#include <map>

namespace nidas { namespace core {

class DynamicLoader {

public:

    static DynamicLoader* getInstance() throw(nidas::util::Exception);

    void *lookup(const std::string& name) throw(nidas::util::Exception);

    void *lookup(const std::string& library,const std::string& name)
        throw(nidas::util::Exception);

private:
    DynamicLoader() throw(nidas::util::Exception);

    DynamicLoader(const DynamicLoader&);

    DynamicLoader& operator=(const DynamicLoader&);

    ~DynamicLoader();

    void*  _defhandle;

    std::map<std::string,void*>  _libhandles;

    static DynamicLoader* _instance;

    static nidas::util::Mutex _instanceLock;

};

}}  // namespace nidas namespace core

#endif