/home/brandes/workspace/LAMA/src/lama/solver/shared_lib.hpp

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#ifndef LAMA_SHARED_LIB_HPP_
#define LAMA_SHARED_LIB_HPP_

#ifdef WIN32
#include <Windows.h>
#define LAMA_LIB_HANDLE_TYPE HINSTANCE
    #ifdef max 
        #undef max
    #endif
#else
#include <dlfcn.h>
#define LAMA_LIB_HANDLE_TYPE void*
#endif //WIN32

#include <string>
#include <vector>
#include <sstream>
#include <iostream>

template<typename FunctionHandleType>
int loadLibAndGetFunctionHandle( FunctionHandleType& functionHandle, LAMA_LIB_HANDLE_TYPE& handle, const char* const filename, const char* const functionName )
{
#ifdef WIN32
    handle = LoadLibrary( filename );
    if( !handle )
    {
        std::stringstream message;
        message<<"Cannot load library: "<<filename<<", because LoadLibrary failed with: "<<GetLastError();
        std::cout << message.str();
        return 1;
    }

    functionHandle = ( FunctionHandleType )  GetProcAddress ( handle , functionName ) ;

    if( !functionHandle )
    {
        std::stringstream message;
        message<<"Cannot load symbol '"<<functionName<<"' from '"
               <<filename<<"': "<<GetLastError();
        std::cout << message.str();
        FreeLibrary( handle );
        return 1;
    }
#else
    // load library
    handle = dlopen( filename,RTLD_LAZY|RTLD_GLOBAL );
    if( !handle )
    {
        std::stringstream message;
        message<<"Cannot load library: "<<dlerror( );
        std::cout <<  message.str( ) ;
        return 1;
    }
    dlerror( );

    // getting function getInputSetRegistry( ) from loaded library.
    functionHandle = ( FunctionHandleType ) dlsym( handle,functionName );

    char* dlsym_error = NULL;
    if( ( dlsym_error=dlerror( ) )!=NULL )
    {
        std::stringstream message;
        message<<"Cannot load symbol '"<<functionName<<"' from '"
                <<filename<<"': "<<dlsym_error;
        std::cout <<  message.str( );
        dlclose( handle );
        return 1;
    }
#endif //WIN32
    return 0;
}

template<typename FunctionHandleType>
int getFunctionHandle( FunctionHandleType& functionHandle, LAMA_LIB_HANDLE_TYPE& handle, const char* const functionName )
{
#ifdef WIN32
    functionHandle = ( FunctionHandleType )  GetProcAddress ( handle , functionName ) ;

    if( !functionHandle )
    {
        std::stringstream message;
        message<<"Cannot load symbol '"<<functionName<<"': "<<GetLastError();
        std::cout << message.str( );
        FreeLibrary( handle );
        return 1;
    }
#else
    // getting function getInputSetRegistry( ) from loaded library.
    functionHandle = ( FunctionHandleType ) dlsym( handle,functionName );

    char* dlsym_error = NULL;
    if( ( dlsym_error=dlerror( ) )!=NULL )
    {
        std::stringstream message;
        message<<"Cannot load symbol '"<<functionName<<"': "<<dlsym_error;
        std::cout <<  message.str( );
        dlclose( handle );
        return 1;
    }
#endif //WIN32
    return 0;

}

inline void freeLibHandle( LAMA_LIB_HANDLE_TYPE handle )
{
#ifdef WIN32
    FreeLibrary( handle );
#else
    dlclose( handle );
#endif //WIN32
}

#endif // LAMA_SHARED_LIB_HPP_