boost/asio/detail/impl/service_registry.hpp

   1 //
   2 // detail/impl/service_registry.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef BOOST_ASIO_DETAIL_IMPL_SERVICE_REGISTRY_HPP
  12 #define BOOST_ASIO_DETAIL_IMPL_SERVICE_REGISTRY_HPP
  13
  14 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  15 # pragma once
  16 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  17
  18 #include <boost/asio/detail/push_options.hpp>
  19
  20 namespace boost {
  21 namespace asio {
  22 namespace detail {
  23
  24 template <typename Service, typename Arg>
  25 service_registry::service_registry(
  26     boost::asio::io_service& o, Service*, Arg arg)
  27   : owner_(o),
  28     first_service_(new Service(o, arg))
  29 {
  30   boost::asio::io_service::service::key key;
  31   init_key(key, Service::id);
  32   first_service_->key_ = key;
  33   first_service_->next_ = 0;
  34 }
  35
  36 template <typename Service>
  37 Service& service_registry::first_service()
  38 {
  39   return *static_cast<Service*>(first_service_);
  40 }
  41
  42 template <typename Service>
  43 Service& service_registry::use_service()
  44 {
  45   boost::asio::io_service::service::key key;
  46   init_key(key, Service::id);
  47   factory_type factory = &service_registry::create<Service>;
  48   return *static_cast<Service*>(do_use_service(key, factory));
  49 }
  50
  51 template <typename Service>
  52 void service_registry::add_service(Service* new_service)
  53 {
  54   boost::asio::io_service::service::key key;
  55   init_key(key, Service::id);
  56   return do_add_service(key, new_service);
  57 }
  58
  59 template <typename Service>
  60 bool service_registry::has_service() const
  61 {
  62   boost::asio::io_service::service::key key;
  63   init_key(key, Service::id);
  64   return do_has_service(key);
  65 }
  66
  67 #if !defined(BOOST_ASIO_NO_TYPEID)
  68 template <typename Service>
  69 void service_registry::init_key(boost::asio::io_service::service::key& key,
  70     const boost::asio::detail::service_id<Service>& /*id*/)
  71 {
  72   key.type_info_ = &typeid(typeid_wrapper<Service>);
  73   key.id_ = 0;
  74 }
  75 #endif // !defined(BOOST_ASIO_NO_TYPEID)
  76
  77 template <typename Service>
  78 boost::asio::io_service::service* service_registry::create(
  79     boost::asio::io_service& owner)
  80 {
  81   return new Service(owner);
  82 }
  83
  84 } // namespace detail
  85 } // namespace asio
  86 } // namespace boost
  87
  88 #include <boost/asio/detail/pop_options.hpp>
  89
  90 #endif // BOOST_ASIO_DETAIL_IMPL_SERVICE_REGISTRY_HPP