ceph/src/boost/libs/dll/example/tutorial2/tutorial2.cpp

   1 // Copyright 2014 Renato Tegon Forti, Antony Polukhin.
   2 // Copyright 2015 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_tutorial2
  11 #include <boost/dll/import.hpp> // for import_alias
  12 #include <boost/function.hpp>
  13 #include <iostream>
  14 #include "../tutorial_common/my_plugin_api.hpp"
  15
  16 namespace dll = boost::dll;
  17
  18 int main(int argc, char* argv[]) {
  19     /*<-*/ b2_workarounds::argv_to_path_guard guard(argc, argv); /*->*/
  20     boost::filesystem::path shared_library_path(argv[1]);               // argv[1] contains path to directory with our plugin library
  21     shared_library_path /= "my_plugin_aggregator";
  22     typedef boost::shared_ptr<my_plugin_api> (pluginapi_create_t)();
  23     boost::function<pluginapi_create_t> creator;
  24
  25     creator = boost::dll::import_alias<pluginapi_create_t>(             // type of imported symbol must be explicitly specified
  26         shared_library_path,                                            // path to library
  27         "create_plugin",                                                // symbol to import
  28         dll::load_mode::append_decorations                              // do append extensions and prefixes
  29     );
  30
  31     boost::shared_ptr<my_plugin_api> plugin = creator();
  32     std::cout << "plugin->calculate(1.5, 1.5) call:  " << plugin->calculate(1.5, 1.5) << std::endl;
  33     std::cout << "plugin->calculate(1.5, 1.5) second call:  " << plugin->calculate(1.5, 1.5) << std::endl;
  34     std::cout << "Plugin Name:  " << plugin->name() << std::endl;
  35 }
  36 //]