{

if (is_open() )

{

close();

}

#ifdef WIN32

lib_handle = ::LoadLibrary(libPath.c_str() );

#elif POSIX

lib_handle = ::dlopen(libPath.c_str(), RTLD_NOW | RTLD_LOCAL);

#else

#error "Undefine platform"

#endif

if (nullptr == lib_handle)

{

#ifdef POSIX

std::cout << ::dlerror() << std::endl;

#endif

return false;

}

return true;

{

if (lib_handle)

{

#ifdef WIN32

::FreeLibrary(lib_handle);

#elif POSIX

::dlclose(lib_handle);

#else

#error "Undefine platform"

#endif

lib_handle = nullptr;

}

{

if (lib_handle)

{

#ifdef WIN32

*addr = reinterpret_cast<void *(*)(void *)>(::GetProcAddress(lib_handle, symbolName.c_str() ) );

return nullptr != *addr;

#elif POSIX

char *error = ::dlerror();

*addr = reinterpret_cast<void *(*)(void *)>(::dlsym(lib_handle, symbolName.c_str() ) );

error = ::dlerror();

return nullptr == error;

#else

#error "Undefine platform"

#endif

}

return false;

{

if (lib_handle)

{

#ifdef WIN32

*addr = reinterpret_cast<void *(*)(void *)>(::GetProcAddress(lib_handle, symbolName) );

return nullptr != *addr;

#elif POSIX

char *error = ::dlerror();

*addr = reinterpret_cast<void *(*)(void *)>(::dlsym(lib_handle, symbolName) );

error = ::dlerror();

return nullptr == error;

#else

#error "Undefine platform"

#endif

}

return false;