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- // Copyright 2015-2019 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
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