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- #ifndef BOOST_ASIO_IO_CONTEXT_HPP
- #define BOOST_ASIO_IO_CONTEXT_HPP
- #if defined(_MSC_VER) && (_MSC_VER >= 1200)
- # pragma once
- #endif
- #include <boost/asio/detail/config.hpp>
- #include <cstddef>
- #include <stdexcept>
- #include <typeinfo>
- #include <boost/asio/async_result.hpp>
- #include <boost/asio/detail/chrono.hpp>
- #include <boost/asio/detail/concurrency_hint.hpp>
- #include <boost/asio/detail/cstdint.hpp>
- #include <boost/asio/detail/wrapped_handler.hpp>
- #include <boost/system/error_code.hpp>
- #include <boost/asio/execution.hpp>
- #include <boost/asio/execution_context.hpp>
- #if defined(BOOST_ASIO_WINDOWS) || defined(__CYGWIN__)
- # include <boost/asio/detail/winsock_init.hpp>
- #elif defined(__sun) || defined(__QNX__) || defined(__hpux) || defined(_AIX) \
- || defined(__osf__)
- # include <boost/asio/detail/signal_init.hpp>
- #endif
- #if defined(BOOST_ASIO_HAS_IOCP)
- # include <boost/asio/detail/win_iocp_io_context.hpp>
- #else
- # include <boost/asio/detail/scheduler.hpp>
- #endif
- #include <boost/asio/detail/push_options.hpp>
- namespace boost {
- namespace asio {
- namespace detail {
- #if defined(BOOST_ASIO_HAS_IOCP)
- typedef win_iocp_io_context io_context_impl;
- class win_iocp_overlapped_ptr;
- #else
- typedef scheduler io_context_impl;
- #endif
- struct io_context_bits
- {
- static constexpr uintptr_t blocking_never = 1;
- static constexpr uintptr_t relationship_continuation = 2;
- static constexpr uintptr_t outstanding_work_tracked = 4;
- static constexpr uintptr_t runtime_bits = 3;
- };
- }
- class io_context
- : public execution_context
- {
- private:
- typedef detail::io_context_impl impl_type;
- #if defined(BOOST_ASIO_HAS_IOCP)
- friend class detail::win_iocp_overlapped_ptr;
- #endif
- #if !defined(BOOST_ASIO_NO_DEPRECATED)
- struct initiate_dispatch;
- struct initiate_post;
- #endif
- public:
- template <typename Allocator, uintptr_t Bits>
- class basic_executor_type;
- template <typename Allocator, uintptr_t Bits>
- friend class basic_executor_type;
-
- typedef basic_executor_type<std::allocator<void>, 0> executor_type;
- #if !defined(BOOST_ASIO_NO_DEPRECATED)
- class work;
- friend class work;
- #endif
- class service;
- #if !defined(BOOST_ASIO_NO_EXTENSIONS) \
- && !defined(BOOST_ASIO_NO_TS_EXECUTORS)
- class strand;
- #endif
-
-
- typedef std::size_t count_type;
-
- BOOST_ASIO_DECL io_context();
-
-
- BOOST_ASIO_DECL explicit io_context(int concurrency_hint);
-
-
- BOOST_ASIO_DECL ~io_context();
-
- executor_type get_executor() noexcept;
-
-
- BOOST_ASIO_DECL count_type run();
- #if !defined(BOOST_ASIO_NO_DEPRECATED)
-
-
-
- BOOST_ASIO_DECL count_type run(boost::system::error_code& ec);
- #endif
-
-
-
- template <typename Rep, typename Period>
- std::size_t run_for(const chrono::duration<Rep, Period>& rel_time);
-
-
- template <typename Clock, typename Duration>
- std::size_t run_until(const chrono::time_point<Clock, Duration>& abs_time);
-
-
-
- BOOST_ASIO_DECL count_type run_one();
- #if !defined(BOOST_ASIO_NO_DEPRECATED)
-
-
-
- BOOST_ASIO_DECL count_type run_one(boost::system::error_code& ec);
- #endif
-
-
-
- template <typename Rep, typename Period>
- std::size_t run_one_for(const chrono::duration<Rep, Period>& rel_time);
-
-
-
- template <typename Clock, typename Duration>
- std::size_t run_one_until(
- const chrono::time_point<Clock, Duration>& abs_time);
-
-
-
- BOOST_ASIO_DECL count_type poll();
- #if !defined(BOOST_ASIO_NO_DEPRECATED)
-
-
-
- BOOST_ASIO_DECL count_type poll(boost::system::error_code& ec);
- #endif
-
-
-
- BOOST_ASIO_DECL count_type poll_one();
- #if !defined(BOOST_ASIO_NO_DEPRECATED)
-
-
-
- BOOST_ASIO_DECL count_type poll_one(boost::system::error_code& ec);
- #endif
-
-
- BOOST_ASIO_DECL void stop();
-
-
- BOOST_ASIO_DECL bool stopped() const;
-
-
- BOOST_ASIO_DECL void restart();
- #if !defined(BOOST_ASIO_NO_DEPRECATED)
-
-
-
- void reset();
-
-
-
- template <typename LegacyCompletionHandler>
- auto dispatch(LegacyCompletionHandler&& handler)
- -> decltype(
- async_initiate<LegacyCompletionHandler, void ()>(
- declval<initiate_dispatch>(), handler, this));
-
-
-
- template <typename LegacyCompletionHandler>
- auto post(LegacyCompletionHandler&& handler)
- -> decltype(
- async_initiate<LegacyCompletionHandler, void ()>(
- declval<initiate_post>(), handler, this));
-
-
-
- template <typename Handler>
- #if defined(GENERATING_DOCUMENTATION)
- unspecified
- #else
- detail::wrapped_handler<io_context&, Handler>
- #endif
- wrap(Handler handler);
- #endif
- private:
- io_context(const io_context&) = delete;
- io_context& operator=(const io_context&) = delete;
-
- BOOST_ASIO_DECL impl_type& add_impl(impl_type* impl);
-
-
- template <typename Service>
- friend Service& use_service(io_context& ioc);
- #if defined(BOOST_ASIO_WINDOWS) || defined(__CYGWIN__)
- detail::winsock_init<> init_;
- #elif defined(__sun) || defined(__QNX__) || defined(__hpux) || defined(_AIX) \
- || defined(__osf__)
- detail::signal_init<> init_;
- #endif
-
- impl_type& impl_;
- };
- namespace detail {
- }
- template <typename Allocator, uintptr_t Bits>
- class io_context::basic_executor_type :
- detail::io_context_bits, Allocator
- {
- public:
-
- basic_executor_type(const basic_executor_type& other) noexcept
- : Allocator(static_cast<const Allocator&>(other)),
- target_(other.target_)
- {
- if (Bits & outstanding_work_tracked)
- if (context_ptr())
- context_ptr()->impl_.work_started();
- }
-
- basic_executor_type(basic_executor_type&& other) noexcept
- : Allocator(static_cast<Allocator&&>(other)),
- target_(other.target_)
- {
- if (Bits & outstanding_work_tracked)
- other.target_ = 0;
- }
-
- ~basic_executor_type() noexcept
- {
- if (Bits & outstanding_work_tracked)
- if (context_ptr())
- context_ptr()->impl_.work_finished();
- }
-
- basic_executor_type& operator=(const basic_executor_type& other) noexcept;
-
- basic_executor_type& operator=(basic_executor_type&& other) noexcept;
- #if !defined(GENERATING_DOCUMENTATION)
- private:
- friend struct boost_asio_require_fn::impl;
- friend struct boost_asio_prefer_fn::impl;
- #endif
-
-
- constexpr basic_executor_type require(execution::blocking_t::possibly_t) const
- {
- return basic_executor_type(context_ptr(),
- *this, bits() & ~blocking_never);
- }
-
-
- constexpr basic_executor_type require(execution::blocking_t::never_t) const
- {
- return basic_executor_type(context_ptr(),
- *this, bits() | blocking_never);
- }
-
-
- constexpr basic_executor_type require(execution::relationship_t::fork_t) const
- {
- return basic_executor_type(context_ptr(),
- *this, bits() & ~relationship_continuation);
- }
-
-
- constexpr basic_executor_type require(
- execution::relationship_t::continuation_t) const
- {
- return basic_executor_type(context_ptr(),
- *this, bits() | relationship_continuation);
- }
-
-
- constexpr basic_executor_type<Allocator,
- BOOST_ASIO_UNSPECIFIED(Bits | outstanding_work_tracked)>
- require(execution::outstanding_work_t::tracked_t) const
- {
- return basic_executor_type<Allocator, Bits | outstanding_work_tracked>(
- context_ptr(), *this, bits());
- }
-
-
- constexpr basic_executor_type<Allocator,
- BOOST_ASIO_UNSPECIFIED(Bits & ~outstanding_work_tracked)>
- require(execution::outstanding_work_t::untracked_t) const
- {
- return basic_executor_type<Allocator, Bits & ~outstanding_work_tracked>(
- context_ptr(), *this, bits());
- }
-
-
- template <typename OtherAllocator>
- constexpr basic_executor_type<OtherAllocator, Bits>
- require(execution::allocator_t<OtherAllocator> a) const
- {
- return basic_executor_type<OtherAllocator, Bits>(
- context_ptr(), a.value(), bits());
- }
-
-
- constexpr basic_executor_type<std::allocator<void>, Bits>
- require(execution::allocator_t<void>) const
- {
- return basic_executor_type<std::allocator<void>, Bits>(
- context_ptr(), std::allocator<void>(), bits());
- }
- #if !defined(GENERATING_DOCUMENTATION)
- private:
- friend struct boost_asio_query_fn::impl;
- friend struct boost::asio::execution::detail::mapping_t<0>;
- friend struct boost::asio::execution::detail::outstanding_work_t<0>;
- #endif
-
-
- static constexpr execution::mapping_t query(execution::mapping_t) noexcept
- {
- return execution::mapping.thread;
- }
-
-
- io_context& query(execution::context_t) const noexcept
- {
- return *context_ptr();
- }
-
-
- constexpr execution::blocking_t query(execution::blocking_t) const noexcept
- {
- return (bits() & blocking_never)
- ? execution::blocking_t(execution::blocking.never)
- : execution::blocking_t(execution::blocking.possibly);
- }
-
-
- constexpr execution::relationship_t query(
- execution::relationship_t) const noexcept
- {
- return (bits() & relationship_continuation)
- ? execution::relationship_t(execution::relationship.continuation)
- : execution::relationship_t(execution::relationship.fork);
- }
-
-
- static constexpr execution::outstanding_work_t query(
- execution::outstanding_work_t) noexcept
- {
- return (Bits & outstanding_work_tracked)
- ? execution::outstanding_work_t(execution::outstanding_work.tracked)
- : execution::outstanding_work_t(execution::outstanding_work.untracked);
- }
-
-
- template <typename OtherAllocator>
- constexpr Allocator query(
- execution::allocator_t<OtherAllocator>) const noexcept
- {
- return static_cast<const Allocator&>(*this);
- }
-
-
- constexpr Allocator query(execution::allocator_t<void>) const noexcept
- {
- return static_cast<const Allocator&>(*this);
- }
- public:
-
-
- bool running_in_this_thread() const noexcept;
-
-
- friend bool operator==(const basic_executor_type& a,
- const basic_executor_type& b) noexcept
- {
- return a.target_ == b.target_
- && static_cast<const Allocator&>(a) == static_cast<const Allocator&>(b);
- }
-
-
- friend bool operator!=(const basic_executor_type& a,
- const basic_executor_type& b) noexcept
- {
- return a.target_ != b.target_
- || static_cast<const Allocator&>(a) != static_cast<const Allocator&>(b);
- }
-
- template <typename Function>
- void execute(Function&& f) const;
- #if !defined(BOOST_ASIO_NO_TS_EXECUTORS)
- public:
-
- io_context& context() const noexcept;
-
-
- void on_work_started() const noexcept;
-
-
- void on_work_finished() const noexcept;
-
-
- template <typename Function, typename OtherAllocator>
- void dispatch(Function&& f, const OtherAllocator& a) const;
-
-
- template <typename Function, typename OtherAllocator>
- void post(Function&& f, const OtherAllocator& a) const;
-
-
- template <typename Function, typename OtherAllocator>
- void defer(Function&& f, const OtherAllocator& a) const;
- #endif
- private:
- friend class io_context;
- template <typename, uintptr_t> friend class basic_executor_type;
-
- explicit basic_executor_type(io_context& i) noexcept
- : Allocator(),
- target_(reinterpret_cast<uintptr_t>(&i))
- {
- if (Bits & outstanding_work_tracked)
- context_ptr()->impl_.work_started();
- }
-
- basic_executor_type(io_context* i,
- const Allocator& a, uintptr_t bits) noexcept
- : Allocator(a),
- target_(reinterpret_cast<uintptr_t>(i) | bits)
- {
- if (Bits & outstanding_work_tracked)
- if (context_ptr())
- context_ptr()->impl_.work_started();
- }
- io_context* context_ptr() const noexcept
- {
- return reinterpret_cast<io_context*>(target_ & ~runtime_bits);
- }
- uintptr_t bits() const noexcept
- {
- return target_ & runtime_bits;
- }
-
- uintptr_t target_;
- };
- #if !defined(BOOST_ASIO_NO_DEPRECATED)
- class io_context::work
- {
- public:
-
-
- explicit work(boost::asio::io_context& io_context);
-
-
- work(const work& other);
-
-
- ~work();
-
- boost::asio::io_context& get_io_context();
- private:
-
- void operator=(const work& other);
-
- detail::io_context_impl& io_context_impl_;
- };
- #endif
- class io_context::service
- : public execution_context::service
- {
- public:
-
- boost::asio::io_context& get_io_context();
- private:
-
- BOOST_ASIO_DECL virtual void shutdown();
- #if !defined(BOOST_ASIO_NO_DEPRECATED)
-
-
- BOOST_ASIO_DECL virtual void shutdown_service();
- #endif
-
-
-
- BOOST_ASIO_DECL virtual void notify_fork(
- execution_context::fork_event event);
- #if !defined(BOOST_ASIO_NO_DEPRECATED)
-
-
-
- BOOST_ASIO_DECL virtual void fork_service(
- execution_context::fork_event event);
- #endif
- protected:
-
-
- BOOST_ASIO_DECL service(boost::asio::io_context& owner);
-
- BOOST_ASIO_DECL virtual ~service();
- };
- namespace detail {
- template <typename Type>
- class service_base
- : public boost::asio::io_context::service
- {
- public:
- static boost::asio::detail::service_id<Type> id;
-
- service_base(boost::asio::io_context& io_context)
- : boost::asio::io_context::service(io_context)
- {
- }
- };
- template <typename Type>
- boost::asio::detail::service_id<Type> service_base<Type>::id;
- }
- #if !defined(GENERATING_DOCUMENTATION)
- namespace traits {
- #if !defined(BOOST_ASIO_HAS_DEDUCED_EQUALITY_COMPARABLE_TRAIT)
- template <typename Allocator, uintptr_t Bits>
- struct equality_comparable<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = true;
- };
- #endif
- #if !defined(BOOST_ASIO_HAS_DEDUCED_EXECUTE_MEMBER_TRAIT)
- template <typename Allocator, uintptr_t Bits, typename Function>
- struct execute_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- Function
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = false;
- typedef void result_type;
- };
- #endif
- #if !defined(BOOST_ASIO_HAS_DEDUCED_REQUIRE_MEMBER_TRAIT)
- template <typename Allocator, uintptr_t Bits>
- struct require_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- boost::asio::execution::blocking_t::possibly_t
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = false;
- typedef boost::asio::io_context::basic_executor_type<
- Allocator, Bits> result_type;
- };
- template <typename Allocator, uintptr_t Bits>
- struct require_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- boost::asio::execution::blocking_t::never_t
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = false;
- typedef boost::asio::io_context::basic_executor_type<
- Allocator, Bits> result_type;
- };
- template <typename Allocator, uintptr_t Bits>
- struct require_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- boost::asio::execution::relationship_t::fork_t
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = false;
- typedef boost::asio::io_context::basic_executor_type<
- Allocator, Bits> result_type;
- };
- template <typename Allocator, uintptr_t Bits>
- struct require_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- boost::asio::execution::relationship_t::continuation_t
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = false;
- typedef boost::asio::io_context::basic_executor_type<
- Allocator, Bits> result_type;
- };
- template <typename Allocator, uintptr_t Bits>
- struct require_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- boost::asio::execution::outstanding_work_t::tracked_t
- > : boost::asio::detail::io_context_bits
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = false;
- typedef boost::asio::io_context::basic_executor_type<
- Allocator, Bits | outstanding_work_tracked> result_type;
- };
- template <typename Allocator, uintptr_t Bits>
- struct require_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- boost::asio::execution::outstanding_work_t::untracked_t
- > : boost::asio::detail::io_context_bits
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = false;
- typedef boost::asio::io_context::basic_executor_type<
- Allocator, Bits & ~outstanding_work_tracked> result_type;
- };
- template <typename Allocator, uintptr_t Bits>
- struct require_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- boost::asio::execution::allocator_t<void>
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = false;
- typedef boost::asio::io_context::basic_executor_type<
- std::allocator<void>, Bits> result_type;
- };
- template <uintptr_t Bits,
- typename Allocator, typename OtherAllocator>
- struct require_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- boost::asio::execution::allocator_t<OtherAllocator>
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = false;
- typedef boost::asio::io_context::basic_executor_type<
- OtherAllocator, Bits> result_type;
- };
- #endif
- #if !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
- template <typename Allocator, uintptr_t Bits, typename Property>
- struct query_static_constexpr_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- Property,
- typename boost::asio::enable_if<
- boost::asio::is_convertible<
- Property,
- boost::asio::execution::outstanding_work_t
- >::value
- >::type
- > : boost::asio::detail::io_context_bits
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = true;
- typedef boost::asio::execution::outstanding_work_t result_type;
- static constexpr result_type value() noexcept
- {
- return (Bits & outstanding_work_tracked)
- ? execution::outstanding_work_t(execution::outstanding_work.tracked)
- : execution::outstanding_work_t(execution::outstanding_work.untracked);
- }
- };
- template <typename Allocator, uintptr_t Bits, typename Property>
- struct query_static_constexpr_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- Property,
- typename boost::asio::enable_if<
- boost::asio::is_convertible<
- Property,
- boost::asio::execution::mapping_t
- >::value
- >::type
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = true;
- typedef boost::asio::execution::mapping_t::thread_t result_type;
- static constexpr result_type value() noexcept
- {
- return result_type();
- }
- };
- #endif
- #if !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
- template <typename Allocator, uintptr_t Bits, typename Property>
- struct query_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- Property,
- typename boost::asio::enable_if<
- boost::asio::is_convertible<
- Property,
- boost::asio::execution::blocking_t
- >::value
- >::type
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = true;
- typedef boost::asio::execution::blocking_t result_type;
- };
- template <typename Allocator, uintptr_t Bits, typename Property>
- struct query_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- Property,
- typename boost::asio::enable_if<
- boost::asio::is_convertible<
- Property,
- boost::asio::execution::relationship_t
- >::value
- >::type
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = true;
- typedef boost::asio::execution::relationship_t result_type;
- };
- template <typename Allocator, uintptr_t Bits>
- struct query_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- boost::asio::execution::context_t
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = true;
- typedef boost::asio::io_context& result_type;
- };
- template <typename Allocator, uintptr_t Bits>
- struct query_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- boost::asio::execution::allocator_t<void>
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = true;
- typedef Allocator result_type;
- };
- template <typename Allocator, uintptr_t Bits, typename OtherAllocator>
- struct query_member<
- boost::asio::io_context::basic_executor_type<Allocator, Bits>,
- boost::asio::execution::allocator_t<OtherAllocator>
- >
- {
- static constexpr bool is_valid = true;
- static constexpr bool is_noexcept = true;
- typedef Allocator result_type;
- };
- #endif
- }
- namespace execution {
- template <>
- struct is_executor<io_context> : false_type
- {
- };
- }
- #endif
- }
- }
- #include <boost/asio/detail/pop_options.hpp>
- #include <boost/asio/impl/io_context.hpp>
- #if defined(BOOST_ASIO_HEADER_ONLY)
- # include <boost/asio/impl/io_context.ipp>
- #endif
- #if !defined(BOOST_ASIO_NO_EXTENSIONS)
- # if defined(BOOST_ASIO_STRAND_HPP)
- # include <boost/asio/io_context_strand.hpp>
- # endif
- #endif
- #endif
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