// Copyright 2015-2016 Antony Polukhin. // // Distributed under the Boost Software License, Version 1.0. // (See accompanying file LICENSE_1_0.txt // or copy at http://www.boost.org/LICENSE_1_0.txt) #include <boost/predef/os.h> #if BOOST_OS_WINDOWS //[callplugcpp_tutorial9 #include <boost/dll/import.hpp> // for dll::import #include <boost/dll/shared_library.hpp> // for dll::shared_library #include <boost/function.hpp> #include <iostream> #include <windows.h> namespace dll = boost::dll; int main() { typedef HANDLE(__stdcall GetStdHandle_t)(DWORD ); // function signature with calling convention // OPTION #0, requires C++11 compatible compiler that understands GetStdHandle_t signature. /*<-*/ #if defined(_MSC_VER) && !defined(BOOST_NO_CXX11_TRAILING_RESULT_TYPES) && !defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) /*->*/ auto get_std_handle = dll::import<GetStdHandle_t>( "Kernel32.dll", "GetStdHandle", boost::dll::load_mode::search_system_folders ); std::cout << "0.0 GetStdHandle() returned " << get_std_handle(STD_OUTPUT_HANDLE) << std::endl; // You may put the `get_std_handle` into boost::function<>. But boost::function<Signature> can not compile with // Signature template parameter that contains calling conventions, so you'll have to remove the calling convention. boost::function<HANDLE(DWORD)> get_std_handle2 = get_std_handle; std::cout << "0.1 GetStdHandle() returned " << get_std_handle2(STD_OUTPUT_HANDLE) << std::endl; /*<-*/ #endif /*->*/ // OPTION #1, does not require C++11. But without C++11 dll::import<> can not handle calling conventions, // so you'll need to hand write the import. dll::shared_library lib("Kernel32.dll", dll::load_mode::search_system_folders); GetStdHandle_t& func = lib.get<GetStdHandle_t>("GetStdHandle"); // Here `func` does not keep a reference to `lib`, you'll have to deal with that on your own. std::cout << "1.0 GetStdHandle() returned " << func(STD_OUTPUT_HANDLE) << std::endl; return 0; } //] #else // BOOST_WINDOWS #include <boost/dll/shared_library.hpp> // for dll::shared_library int main() { return 0; } #endif // BOOST_WINDOWS