ceph/src/boost/libs/dll/example/tutorial1/my_plugin_sum.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 <iostream>
   9
  10
  11 //[plugcpp_my_plugin_sum
  12 #include <boost/config.hpp> // for BOOST_SYMBOL_EXPORT
  13 #include "../tutorial_common/my_plugin_api.hpp"
  14
  15 namespace my_namespace {
  16
  17 class my_plugin_sum : public my_plugin_api {
  18 public:
  19     my_plugin_sum() {
  20         std::cout << "Constructing my_plugin_sum" << std::endl;
  21     }
  22
  23     std::string name() const {
  24         return "sum";
  25     }
  26
  27     float calculate(float x, float y) {
  28         return x + y;
  29     }
  30
  31     ~my_plugin_sum() {
  32         std::cout << "Destructing my_plugin_sum ;o)" << std::endl;
  33     }
  34 };
  35
  36 // Exporting `my_namespace::plugin` variable with alias name `plugin`
  37 // (Has the same effect as `BOOST_DLL_ALIAS(my_namespace::plugin, plugin)`)
  38 extern "C" BOOST_SYMBOL_EXPORT my_plugin_sum plugin;
  39 my_plugin_sum plugin;
  40
  41 } // namespace my_namespace
  42
  43 //]