ceph/src/boost/libs/dll/example/tutorial2/my_plugin_aggregator.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 #include <boost/make_shared.hpp>
  10
  11 // MinGW related workaround
  12 #define BOOST_DLL_FORCE_ALIAS_INSTANTIATION
  13
  14 //[plugcpp_my_plugin_aggregator
  15 #include <boost/dll/alias.hpp> // for BOOST_DLL_ALIAS
  16 #include "../tutorial_common/my_plugin_api.hpp"
  17
  18 namespace my_namespace {
  19
  20 class my_plugin_aggregator : public my_plugin_api {
  21     float aggr_;
  22     my_plugin_aggregator() : aggr_(0) {}
  23
  24 public:
  25     std::string name() const {
  26         return "aggregator";
  27     }
  28
  29     float calculate(float x, float y) {
  30         aggr_ += x + y;
  31         return aggr_;
  32     }
  33
  34     // Factory method
  35     static boost::shared_ptr<my_plugin_aggregator> create() {
  36         return boost::shared_ptr<my_plugin_aggregator>(
  37             new my_plugin_aggregator()
  38         );
  39     }
  40 };
  41
  42
  43 BOOST_DLL_ALIAS(
  44     my_namespace::my_plugin_aggregator::create, // <-- this function is exported with...
  45     create_plugin                               // <-- ...this alias name
  46 )
  47
  48 } // namespace my_namespace
  49 //]
  50
  51
  52