SharedLibrary.h

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/*
 * Copyright (C) 2012 by
 *   MetraLabs GmbH (MLAB), GERMANY
 * and
 *   Neuroinformatics and Cognitive Robotics Labs (NICR) at TU Ilmenau, GERMANY
 * All rights reserved.
 *
 * Contact: info@mira-project.org
 *
 * Commercial Usage:
 *   Licensees holding valid commercial licenses may use this file in
 *   accordance with the commercial license agreement provided with the
 *   software or, alternatively, in accordance with the terms contained in
 *   a written agreement between you and MLAB or NICR.
 *
 * GNU General Public License Usage:
 *   Alternatively, this file may be used under the terms of the GNU
 *   General Public License version 3.0 as published by the Free Software
 *   Foundation and appearing in the file LICENSE.GPL3 included in the
 *   packaging of this file. Please review the following information to
 *   ensure the GNU General Public License version 3.0 requirements will be
 *   met: http://www.gnu.org/copyleft/gpl.html.
 *   Alternatively you may (at your option) use any later version of the GNU
 *   General Public License if such license has been publicly approved by
 *   MLAB and NICR (or its successors, if any).
 *
 * IN NO EVENT SHALL "MLAB" OR "NICR" BE LIABLE TO ANY PARTY FOR DIRECT,
 * INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
 * THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF "MLAB" OR
 * "NICR" HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * "MLAB" AND "NICR" SPECIFICALLY DISCLAIM ANY WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND "MLAB" AND "NICR" HAVE NO OBLIGATION TO
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 */

#ifndef _MIRA_SHAREDLIBRARY_H_
#define _MIRA_SHAREDLIBRARY_H_

#include <list>

#ifndef Q_MOC_RUN
#include <boost/shared_ptr.hpp>
#endif

#include <utils/Path.h>

namespace mira {


MIRA_BASE_EXPORT Path resolveLibraryName(const Path& path);


class MIRA_BASE_EXPORT SharedLibrary : boost::noncopyable
{
public:
#ifdef MIRA_LINUX
    typedef void* Handle;
    typedef void* Symbol;
#else
    typedef HMODULE Handle;
    typedef FARPROC Symbol;
#endif

    SharedLibrary(const Path& library);

    ~SharedLibrary();

    static const char* getLibPrefix();

    static const char* getLibPostfix();

    static const char* getLibExtension();

    bool isOpen() const
    {
        return mHandle != 0;
    }

    void close()
    {
        closeSharedLibrary(mHandle);
        mHandle = 0;
    }

    Symbol getSymbol(const std::string& symbol)
    {
        return getSymbol(mHandle, symbol.c_str());
    }

    static SharedLibrary::Handle loadSharedLibrary(const char* library);
    
    static SharedLibrary::Symbol getSymbol(SharedLibrary::Handle handle, 
                                           const char* function);

    static void closeSharedLibrary(SharedLibrary::Handle handle);

private:
    Handle mHandle; 
};


typedef boost::shared_ptr<SharedLibrary> SharedLibraryPtr;

class MIRA_BASE_EXPORT SharedLibraryLoader
{
public:
    void loadLibrary(const Path& library);

    void loadLibraries(const Path& path);

protected:
    std::list<SharedLibraryPtr> mLibraries; 
};


}

#endif