ceph/src/boost/boost/asio/impl/execution_context.hpp

   1 //
   2 // impl/execution_context.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_IMPL_EXECUTION_CONTEXT_HPP
  12 #define BOOST_ASIO_IMPL_EXECUTION_CONTEXT_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/handler_type_requirements.hpp>
  19 #include <boost/asio/detail/scoped_ptr.hpp>
  20 #include <boost/asio/detail/service_registry.hpp>
  21
  22 #include <boost/asio/detail/push_options.hpp>
  23
  24 namespace boost {
  25 namespace asio {
  26
  27 template <typename Service>
  28 inline Service& use_service(execution_context& e)
  29 {
  30   // Check that Service meets the necessary type requirements.
  31   (void)static_cast<execution_context::service*>(static_cast<Service*>(0));
  32
  33   return e.service_registry_->template use_service<Service>();
  34 }
  35
  36 #if !defined(GENERATING_DOCUMENTATION)
  37 # if defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
  38
  39 template <typename Service, typename... Args>
  40 Service& make_service(execution_context& e, BOOST_ASIO_MOVE_ARG(Args)... args)
  41 {
  42   detail::scoped_ptr<Service> svc(
  43       new Service(e, BOOST_ASIO_MOVE_CAST(Args)(args)...));
  44   e.service_registry_->template add_service<Service>(svc.get());
  45   Service& result = *svc;
  46   svc.release();
  47   return result;
  48 }
  49
  50 # else // defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
  51
  52 template <typename Service>
  53 Service& make_service(execution_context& e)
  54 {
  55   detail::scoped_ptr<Service> svc(new Service(e));
  56   e.service_registry_->template add_service<Service>(svc.get());
  57   Service& result = *svc;
  58   svc.release();
  59   return result;
  60 }
  61
  62 #define BOOST_ASIO_PRIVATE_MAKE_SERVICE_DEF(n) \
  63   template <typename Service, BOOST_ASIO_VARIADIC_TPARAMS(n)> \
  64   Service& make_service(execution_context& e, \
  65       BOOST_ASIO_VARIADIC_MOVE_PARAMS(n)) \
  66   { \
  67     detail::scoped_ptr<Service> svc( \
  68         new Service(e, BOOST_ASIO_VARIADIC_MOVE_ARGS(n))); \
  69     e.service_registry_->template add_service<Service>(svc.get()); \
  70     Service& result = *svc; \
  71     svc.release(); \
  72     return result; \
  73   } \
  74   /**/
  75   BOOST_ASIO_VARIADIC_GENERATE(BOOST_ASIO_PRIVATE_MAKE_SERVICE_DEF)
  76 #undef BOOST_ASIO_PRIVATE_MAKE_SERVICE_DEF
  77
  78 # endif // defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
  79 #endif // !defined(GENERATING_DOCUMENTATION)
  80
  81 template <typename Service>
  82 inline void add_service(execution_context& e, Service* svc)
  83 {
  84   // Check that Service meets the necessary type requirements.
  85   (void)static_cast<execution_context::service*>(static_cast<Service*>(0));
  86
  87   e.service_registry_->template add_service<Service>(svc);
  88 }
  89
  90 template <typename Service>
  91 inline bool has_service(execution_context& e)
  92 {
  93   // Check that Service meets the necessary type requirements.
  94   (void)static_cast<execution_context::service*>(static_cast<Service*>(0));
  95
  96   return e.service_registry_->template has_service<Service>();
  97 }
  98
  99 inline execution_context& execution_context::service::context()
 100 {
 101   return owner_;
 102 }
 103
 104 } // namespace asio
 105 } // namespace boost
 106
 107 #include <boost/asio/detail/pop_options.hpp>
 108
 109 #endif // BOOST_ASIO_IMPL_EXECUTION_CONTEXT_HPP