dynamic_library_WIN32.h

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/*******************************************************************************
 * wallaroo - A library for configurable creation and wiring of C++ classes.
 * Copyright (C) 2012 Daniele Pallastrelli
 *
 * This file is part of wallaroo.
 * For more information, see http://wallaroolib.sourceforge.net/
 *
 * Boost Software License - Version 1.0 - August 17th, 2003
 *
 * Permission is hereby granted, free of charge, to any person or organization
 * obtaining a copy of the software and accompanying documentation covered by
 * this license (the "Software") to use, reproduce, display, distribute,
 * execute, and transmit the Software, and to prepare derivative works of the
 * Software, and to permit third-parties to whom the Software is furnished to
 * do so, all subject to the following:
 *
 * The copyright notices in the Software and this entire statement, including
 * the above license grant, this restriction and the following disclaimer,
 * must be included in all copies of the Software, in whole or in part, and
 * all derivative works of the Software, unless such copies or derivative
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#ifndef WALLAROO_DETAIL_DYNAMIC_LIBRARY_WIN32_H_
#define WALLAROO_DETAIL_DYNAMIC_LIBRARY_WIN32_H_

#include <string>
#include <windows.h>


namespace wallaroo
{
namespace detail
{

// win32 specific implementation of shared library
class PlatformSpecificDynamicLibrary
{
public:
    // throw WrongFile if the file does not exist or its format is wrong.
    explicit PlatformSpecificDynamicLibrary( const std::string& fileName )
    {
#ifdef _UNICODE
        const std::wstring fn = std::wstring( fileName.begin(), fileName.end() );
        libHandle = LoadLibrary( fn.c_str() );
#else
        libHandle = LoadLibrary( fileName.c_str() );
#endif
        if ( ! libHandle ) throw WrongFile( fileName );
    }
    // Release the OS library
    ~PlatformSpecificDynamicLibrary()
    {
        FreeLibrary( libHandle );
    }
    // Return a function pointer to the symbol funcName. nullptr if the symbol was not found.
    template < typename F >
    F GetFunction( const std::string& funcName )
    {
        F f = (F)GetProcAddress( libHandle, funcName.c_str() );
        return f;
    }
    /* Returns the platform-specific filename suffix
       for shared libraries (including the period).
       In debug mode, the suffix also includes a
       "d" to specify the debug version of a library. */
    static std::string Suffix()
    {
        #if defined(_DEBUG)
            return "d.dll";
        #else
            return ".dll";
        #endif
    }
private:
    HINSTANCE libHandle;
};

} // namespace detail
} // namespace wallaroo

#endif // WALLAROO_DETAIL_DYNAMIC_LIBRARY_WIN32_H_