61 lines
2.2 KiB
C++
61 lines
2.2 KiB
C++
// Copyright 2015-2019 Antony Polukhin.
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt
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// or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/predef/os.h>
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#if BOOST_OS_WINDOWS
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//[callplugcpp_tutorial9
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#include <boost/dll/import.hpp> // for dll::import
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#include <boost/dll/shared_library.hpp> // for dll::shared_library
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#include <boost/function.hpp>
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#include <iostream>
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#include <windows.h>
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namespace dll = boost::dll;
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int main() {
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typedef HANDLE(__stdcall GetStdHandle_t)(DWORD ); // function signature with calling convention
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// OPTION #0, requires C++11 compatible compiler that understands GetStdHandle_t signature.
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/*<-*/
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#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) /*->*/
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auto get_std_handle = dll::import<GetStdHandle_t>(
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"Kernel32.dll",
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"GetStdHandle",
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boost::dll::load_mode::search_system_folders
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);
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std::cout << "0.0 GetStdHandle() returned " << get_std_handle(STD_OUTPUT_HANDLE) << std::endl;
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// You may put the `get_std_handle` into boost::function<>. But boost::function<Signature> can not compile with
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// Signature template parameter that contains calling conventions, so you'll have to remove the calling convention.
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boost::function<HANDLE(DWORD)> get_std_handle2 = get_std_handle;
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std::cout << "0.1 GetStdHandle() returned " << get_std_handle2(STD_OUTPUT_HANDLE) << std::endl;
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/*<-*/
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#endif /*->*/
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// OPTION #1, does not require C++11. But without C++11 dll::import<> can not handle calling conventions,
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// so you'll need to hand write the import.
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dll::shared_library lib("Kernel32.dll", dll::load_mode::search_system_folders);
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GetStdHandle_t& func = lib.get<GetStdHandle_t>("GetStdHandle");
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// Here `func` does not keep a reference to `lib`, you'll have to deal with that on your own.
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std::cout << "1.0 GetStdHandle() returned " << func(STD_OUTPUT_HANDLE) << std::endl;
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return 0;
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}
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//]
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#else // BOOST_WINDOWS
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#include <boost/dll/shared_library.hpp> // for dll::shared_library
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int main() {
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return 0;
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}
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#endif // BOOST_WINDOWS
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