| 1 | // Copyright Antony Polukhin, 2015-2024. |
|---|
| 2 | // |
|---|
| 3 | // Distributed under the Boost Software License, Version 1.0. |
|---|
| 4 | // (See accompanying file LICENSE_1_0.txt |
|---|
| 5 | // or copy at http://www.boost.org/LICENSE_1_0.txt) |
|---|
| 6 | |
|---|
| 7 | #include <boost/predef/os.h> |
|---|
| 8 | #if BOOST_OS_WINDOWS |
|---|
| 9 | |
|---|
| 10 | //[callplugcpp_tutorial9 |
|---|
| 11 | #include <boost/dll/import.hpp> // for dll::import |
|---|
| 12 | #include <boost/dll/shared_library.hpp> // for dll::shared_library |
|---|
| 13 | #include <boost/function.hpp> |
|---|
| 14 | #include <iostream> |
|---|
| 15 | #include <windows.h> |
|---|
| 16 | |
|---|
| 17 | namespace dll = boost::dll; |
|---|
| 18 | |
|---|
| 19 | int main() { |
|---|
| 20 | typedef HANDLE(__stdcall GetStdHandle_t)(DWORD ); // function signature with calling convention |
|---|
| 21 | |
|---|
| 22 | // OPTION #0, requires C++11 compatible compiler that understands GetStdHandle_t signature. |
|---|
| 23 | /*<-*/ |
|---|
| 24 | #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) /*->*/ |
|---|
| 25 | auto get_std_handle = dll::import_symbol<GetStdHandle_t>( |
|---|
| 26 | "Kernel32.dll" , |
|---|
| 27 | "GetStdHandle" , |
|---|
| 28 | boost::dll::load_mode::search_system_folders |
|---|
| 29 | ); |
|---|
| 30 | std::cout << "0.0 GetStdHandle() returned " << get_std_handle(STD_OUTPUT_HANDLE) << std::endl; |
|---|
| 31 | |
|---|
| 32 | // You may put the `get_std_handle` into boost::function<>. But boost::function<Signature> can not compile with |
|---|
| 33 | // Signature template parameter that contains calling conventions, so you'll have to remove the calling convention. |
|---|
| 34 | boost::function<HANDLE(DWORD)> get_std_handle2 = get_std_handle; |
|---|
| 35 | std::cout << "0.1 GetStdHandle() returned " << get_std_handle2(STD_OUTPUT_HANDLE) << std::endl; |
|---|
| 36 | /*<-*/ |
|---|
| 37 | #endif /*->*/ |
|---|
| 38 | |
|---|
| 39 | // OPTION #1, does not require C++11. But without C++11 dll::import<> can not handle calling conventions, |
|---|
| 40 | // so you'll need to hand write the import. |
|---|
| 41 | dll::shared_library lib("Kernel32.dll" , dll::load_mode::search_system_folders); |
|---|
| 42 | GetStdHandle_t& func = lib.get<GetStdHandle_t>("GetStdHandle" ); |
|---|
| 43 | |
|---|
| 44 | // Here `func` does not keep a reference to `lib`, you'll have to deal with that on your own. |
|---|
| 45 | std::cout << "1.0 GetStdHandle() returned " << func(STD_OUTPUT_HANDLE) << std::endl; |
|---|
| 46 | |
|---|
| 47 | return 0; |
|---|
| 48 | } |
|---|
| 49 | |
|---|
| 50 | //] |
|---|
| 51 | |
|---|
| 52 | #else // BOOST_WINDOWS |
|---|
| 53 | |
|---|
| 54 | #include <boost/dll/shared_library.hpp> // for dll::shared_library |
|---|
| 55 | |
|---|
| 56 | int main() { |
|---|
| 57 | return 0; |
|---|
| 58 | } |
|---|
| 59 | |
|---|
| 60 | #endif // BOOST_WINDOWS |
|---|
| 61 | |
|---|
