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- //
- // impl/execution_context.hpp
- // ~~~~~~~~~~~~~~~~~~~~~~~~~~
- //
- // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
- //
- // Distributed under the Boost Software License, Version 1.0. (See accompanying
- // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- //
-
- #ifndef ASIO_IMPL_EXECUTION_CONTEXT_HPP
- #define ASIO_IMPL_EXECUTION_CONTEXT_HPP
-
- #if defined(_MSC_VER) && (_MSC_VER >= 1200)
- # pragma once
- #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
- #include "asio/detail/handler_type_requirements.hpp"
- #include "asio/detail/scoped_ptr.hpp"
- #include "asio/detail/service_registry.hpp"
-
- #include "asio/detail/push_options.hpp"
-
- namespace asio {
-
- template <typename Service>
- inline Service& use_service(execution_context& e)
- {
- // Check that Service meets the necessary type requirements.
- (void)static_cast<execution_context::service*>(static_cast<Service*>(0));
- (void)static_cast<const execution_context::id*>(&Service::id);
-
- return e.service_registry_->template use_service<Service>();
- }
-
- #if !defined(GENERATING_DOCUMENTATION)
- # if defined(ASIO_HAS_VARIADIC_TEMPLATES)
-
- template <typename Service, typename... Args>
- Service& make_service(execution_context& e, ASIO_MOVE_ARG(Args)... args)
- {
- detail::scoped_ptr<Service> svc(
- new Service(e, ASIO_MOVE_CAST(Args)(args)...));
- e.service_registry_->template add_service<Service>(svc.get());
- Service& result = *svc;
- svc.release();
- return result;
- }
-
- # else // defined(ASIO_HAS_VARIADIC_TEMPLATES)
-
- template <typename Service>
- Service& make_service(execution_context& e)
- {
- detail::scoped_ptr<Service> svc(new Service(e));
- e.service_registry_->template add_service<Service>(svc.get());
- Service& result = *svc;
- svc.release();
- return result;
- }
-
- #define ASIO_PRIVATE_MAKE_SERVICE_DEF(n) \
- template <typename Service, ASIO_VARIADIC_TPARAMS(n)> \
- Service& make_service(execution_context& e, \
- ASIO_VARIADIC_MOVE_PARAMS(n)) \
- { \
- detail::scoped_ptr<Service> svc( \
- new Service(e, ASIO_VARIADIC_MOVE_ARGS(n))); \
- e.service_registry_->template add_service<Service>(svc.get()); \
- Service& result = *svc; \
- svc.release(); \
- return result; \
- } \
- /**/
- ASIO_VARIADIC_GENERATE(ASIO_PRIVATE_MAKE_SERVICE_DEF)
- #undef ASIO_PRIVATE_MAKE_SERVICE_DEF
-
- # endif // defined(ASIO_HAS_VARIADIC_TEMPLATES)
- #endif // !defined(GENERATING_DOCUMENTATION)
-
- template <typename Service>
- inline void add_service(execution_context& e, Service* svc)
- {
- // Check that Service meets the necessary type requirements.
- (void)static_cast<execution_context::service*>(static_cast<Service*>(0));
- (void)static_cast<const execution_context::id*>(&Service::id);
-
- e.service_registry_->template add_service<Service>(svc);
- }
-
- template <typename Service>
- inline bool has_service(execution_context& e)
- {
- // Check that Service meets the necessary type requirements.
- (void)static_cast<execution_context::service*>(static_cast<Service*>(0));
- (void)static_cast<const execution_context::id*>(&Service::id);
-
- return e.service_registry_->template has_service<Service>();
- }
-
- inline execution_context& execution_context::service::context()
- {
- return owner_;
- }
-
- } // namespace asio
-
- #include "asio/detail/pop_options.hpp"
-
- #endif // ASIO_IMPL_EXECUTION_CONTEXT_HPP
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