1 // Copyright 2014 Renato Tegon Forti, Antony Polukhin. 2 // Copyright 2015-2019 Antony Polukhin. 3 // 4 // Distributed under the Boost Software License, Version 1.0. 5 // (See accompanying file LICENSE_1_0.txt 6 // or copy at http://www.boost.org/LICENSE_1_0.txt) 7 8 #include "../b2_workarounds.hpp" 9 10 //[callplugcpp_tutorial6 11 #include <boost/dll/import.hpp> 12 #include <boost/function.hpp> 13 #include <iostream> 14 15 typedef boost::function<void()> callback_t; 16 print_unloaded()17void print_unloaded() { 18 std::cout << "unloaded" << std::endl; 19 } 20 main(int argc,char * argv[])21int main(int argc, char* argv[]) { 22 // argv[1] contains full path to our plugin library 23 boost::dll::fs::path shared_library_path = /*<-*/ b2_workarounds::first_lib_from_argv(argc, argv); /*->*/ //=argv[1]; 24 25 // loading library and getting a function from it 26 boost::function<void(const callback_t&)> on_unload 27 = boost::dll::import_alias<void(const callback_t&)>( 28 shared_library_path, "on_unload" 29 ); 30 31 on_unload(&print_unloaded); // adding a callback 32 std::cout << "Before library unload." << std::endl; 33 34 // Releasing last reference to the library, so that it gets unloaded 35 on_unload.clear(); 36 std::cout << "After library unload." << std::endl; 37 } 38 //] 39 40