#include <stdexcept>
#include <typeinfo>
#include <boost/asio/async_result.hpp>
-#include <boost/asio/detail/noncopyable.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_HAS_CHRONO)
# 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 detail {
#if defined(BOOST_ASIO_HAS_IOCP)
- typedef class win_iocp_io_context io_context_impl;
+ typedef win_iocp_io_context io_context_impl;
class win_iocp_overlapped_ptr;
#else
- typedef class scheduler io_context_impl;
+ typedef scheduler io_context_impl;
#endif
+
+ struct io_context_bits
+ {
+ BOOST_ASIO_STATIC_CONSTEXPR(unsigned int, blocking_never = 1);
+ BOOST_ASIO_STATIC_CONSTEXPR(unsigned int, relationship_continuation = 2);
+ BOOST_ASIO_STATIC_CONSTEXPR(unsigned int, outstanding_work_tracked = 4);
+ };
} // namespace detail
/// Provides core I/O functionality.
* returning when there is no more work to do. For example, the io_context may
* be being run in a background thread that is launched prior to the
* application's asynchronous operations. The run() call may be kept running by
- * creating an object of type
- * boost::asio::executor_work_guard<io_context::executor_type>:
+ * creating an executor that tracks work against the io_context:
*
* @code boost::asio::io_context io_context;
- * boost::asio::executor_work_guard<boost::asio::io_context::executor_type>
- * = boost::asio::make_work_guard(io_context);
+ * auto work = boost::asio::require(io_context.get_executor(),
+ * boost::asio::execution::outstanding_work.tracked);
+ * ... @endcode
+ *
+ * If using C++03, which lacks automatic variable type deduction, you may
+ * compute the return type of the require call:
+ *
+ * @code boost::asio::io_context io_context;
+ * typename boost::asio::require_result<
+ * boost::asio::io_context::executor_type,
+ * boost::asio::exeution::outstanding_work_t::tracked_t>
+ * work = boost::asio::require(io_context.get_executor(),
+ * boost::asio::execution::outstanding_work.tracked);
+ * ... @endcode
+ *
+ * or store the result in the type-erasing executor wrapper, any_io_executor:
+ *
+ * @code boost::asio::io_context io_context;
+ * boost::asio::any_io_executor work
+ * = boost::asio::require(io_context.get_executor(),
+ * boost::asio::execution::outstanding_work.tracked);
* ... @endcode
*
* To effect a shutdown, the application will then need to call the io_context
* permitting ready handlers to be dispatched.
*
* Alternatively, if the application requires that all operations and handlers
- * be allowed to finish normally, the work object may be explicitly reset.
+ * be allowed to finish normally, store the work-tracking executor in an
+ * any_io_executor object, so that it may be explicitly reset.
*
* @code boost::asio::io_context io_context;
- * boost::asio::executor_work_guard<boost::asio::io_context::executor_type>
- * = boost::asio::make_work_guard(io_context);
+ * boost::asio::any_io_executor work
+ * = boost::asio::require(io_context.get_executor(),
+ * boost::asio::execution::outstanding_work.tracked);
* ...
- * work.reset(); // Allow run() to exit. @endcode
+ * work = boost::asio::any_io_executor(); // Allow run() to exit. @endcode
*/
class io_context
: public execution_context
#endif
public:
- class executor_type;
- friend class executor_type;
+ template <typename Allocator, unsigned int Bits>
+ class basic_executor_type;
+
+ template <typename Allocator, unsigned int Bits>
+ friend class basic_executor_type;
+
+ /// Executor used to submit functions to an io_context.
+ typedef basic_executor_type<std::allocator<void>, 0> executor_type;
#if !defined(BOOST_ASIO_NO_DEPRECATED)
class work;
class service;
-#if !defined(BOOST_ASIO_NO_EXTENSIONS)
+#if !defined(BOOST_ASIO_NO_EXTENSIONS) \
+ && !defined(BOOST_ASIO_NO_TS_EXECUTORS)
class strand;
#endif // !defined(BOOST_ASIO_NO_EXTENSIONS)
+ // && !defined(BOOST_ASIO_NO_TS_EXECUTORS)
/// The type used to count the number of handlers executed by the context.
typedef std::size_t count_type;
#endif // !defined(BOOST_ASIO_NO_DEPRECATED)
private:
+ io_context(const io_context&) BOOST_ASIO_DELETED;
+ io_context& operator=(const io_context&) BOOST_ASIO_DELETED;
+
#if !defined(BOOST_ASIO_NO_DEPRECATED)
struct initiate_dispatch;
struct initiate_post;
impl_type& impl_;
};
-/// Executor used to submit functions to an io_context.
-class io_context::executor_type
+namespace detail {
+
+} // namespace detail
+
+/// Executor implementation type used to submit functions to an io_context.
+template <typename Allocator, unsigned int Bits>
+class io_context::basic_executor_type : detail::io_context_bits
{
public:
+ /// Copy constructor.
+ basic_executor_type(
+ const basic_executor_type& other) BOOST_ASIO_NOEXCEPT
+ : io_context_(other.io_context_),
+ allocator_(other.allocator_),
+ bits_(other.bits_)
+ {
+ if (Bits & outstanding_work_tracked)
+ if (io_context_)
+ io_context_->impl_.work_started();
+ }
+
+#if defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
+ /// Move constructor.
+ basic_executor_type(basic_executor_type&& other) BOOST_ASIO_NOEXCEPT
+ : io_context_(other.io_context_),
+ allocator_(BOOST_ASIO_MOVE_CAST(Allocator)(other.allocator_)),
+ bits_(other.bits_)
+ {
+ if (Bits & outstanding_work_tracked)
+ other.io_context_ = 0;
+ }
+#endif // defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
+
+ /// Destructor.
+ ~basic_executor_type() BOOST_ASIO_NOEXCEPT
+ {
+ if (Bits & outstanding_work_tracked)
+ if (io_context_)
+ io_context_->impl_.work_finished();
+ }
+
+ /// Assignment operator.
+ basic_executor_type& operator=(
+ const basic_executor_type& other) BOOST_ASIO_NOEXCEPT;
+
+#if defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
+ /// Move assignment operator.
+ basic_executor_type& operator=(
+ basic_executor_type&& other) BOOST_ASIO_NOEXCEPT;
+#endif // defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
+
+ /// Obtain an executor with the @c blocking.possibly property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::require customisation point.
+ *
+ * For example:
+ * @code auto ex1 = my_io_context.get_executor();
+ * auto ex2 = boost::asio::require(ex1,
+ * boost::asio::execution::blocking.possibly); @endcode
+ */
+ BOOST_ASIO_CONSTEXPR basic_executor_type require(
+ execution::blocking_t::possibly_t) const
+ {
+ return basic_executor_type(io_context_,
+ allocator_, bits_ & ~blocking_never);
+ }
+
+ /// Obtain an executor with the @c blocking.never property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::require customisation point.
+ *
+ * For example:
+ * @code auto ex1 = my_io_context.get_executor();
+ * auto ex2 = boost::asio::require(ex1,
+ * boost::asio::execution::blocking.never); @endcode
+ */
+ BOOST_ASIO_CONSTEXPR basic_executor_type require(
+ execution::blocking_t::never_t) const
+ {
+ return basic_executor_type(io_context_,
+ allocator_, bits_ | blocking_never);
+ }
+
+ /// Obtain an executor with the @c relationship.fork property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::require customisation point.
+ *
+ * For example:
+ * @code auto ex1 = my_io_context.get_executor();
+ * auto ex2 = boost::asio::require(ex1,
+ * boost::asio::execution::relationship.fork); @endcode
+ */
+ BOOST_ASIO_CONSTEXPR basic_executor_type require(
+ execution::relationship_t::fork_t) const
+ {
+ return basic_executor_type(io_context_,
+ allocator_, bits_ & ~relationship_continuation);
+ }
+
+ /// Obtain an executor with the @c relationship.continuation property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::require customisation point.
+ *
+ * For example:
+ * @code auto ex1 = my_io_context.get_executor();
+ * auto ex2 = boost::asio::require(ex1,
+ * boost::asio::execution::relationship.continuation); @endcode
+ */
+ BOOST_ASIO_CONSTEXPR basic_executor_type require(
+ execution::relationship_t::continuation_t) const
+ {
+ return basic_executor_type(io_context_,
+ allocator_, bits_ | relationship_continuation);
+ }
+
+ /// Obtain an executor with the @c outstanding_work.tracked property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::require customisation point.
+ *
+ * For example:
+ * @code auto ex1 = my_io_context.get_executor();
+ * auto ex2 = boost::asio::require(ex1,
+ * boost::asio::execution::outstanding_work.tracked); @endcode
+ */
+ BOOST_ASIO_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>(
+ io_context_, allocator_, bits_);
+ }
+
+ /// Obtain an executor with the @c outstanding_work.untracked property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::require customisation point.
+ *
+ * For example:
+ * @code auto ex1 = my_io_context.get_executor();
+ * auto ex2 = boost::asio::require(ex1,
+ * boost::asio::execution::outstanding_work.untracked); @endcode
+ */
+ BOOST_ASIO_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>(
+ io_context_, allocator_, bits_);
+ }
+
+ /// Obtain an executor with the specified @c allocator property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::require customisation point.
+ *
+ * For example:
+ * @code auto ex1 = my_io_context.get_executor();
+ * auto ex2 = boost::asio::require(ex1,
+ * boost::asio::execution::allocator(my_allocator)); @endcode
+ */
+ template <typename OtherAllocator>
+ BOOST_ASIO_CONSTEXPR basic_executor_type<OtherAllocator, Bits>
+ require(execution::allocator_t<OtherAllocator> a) const
+ {
+ return basic_executor_type<OtherAllocator, Bits>(
+ io_context_, a.value(), bits_);
+ }
+
+ /// Obtain an executor with the default @c allocator property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::require customisation point.
+ *
+ * For example:
+ * @code auto ex1 = my_io_context.get_executor();
+ * auto ex2 = boost::asio::require(ex1,
+ * boost::asio::execution::allocator); @endcode
+ */
+ BOOST_ASIO_CONSTEXPR basic_executor_type<std::allocator<void>, Bits>
+ require(execution::allocator_t<void>) const
+ {
+ return basic_executor_type<std::allocator<void>, Bits>(
+ io_context_, std::allocator<void>(), bits_);
+ }
+
+ /// Query the current value of the @c mapping property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::query customisation point.
+ *
+ * For example:
+ * @code auto ex = my_io_context.get_executor();
+ * if (boost::asio::query(ex, boost::asio::execution::mapping)
+ * == boost::asio::execution::mapping.thread)
+ * ... @endcode
+ */
+ static BOOST_ASIO_CONSTEXPR execution::mapping_t query(
+ execution::mapping_t) BOOST_ASIO_NOEXCEPT
+ {
+ return execution::mapping.thread;
+ }
+
+ /// Query the current value of the @c context property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::query customisation point.
+ *
+ * For example:
+ * @code auto ex = my_io_context.get_executor();
+ * boost::asio::io_context& ctx = boost::asio::query(
+ * ex, boost::asio::execution::context); @endcode
+ */
+ io_context& query(execution::context_t) const BOOST_ASIO_NOEXCEPT
+ {
+ return *io_context_;
+ }
+
+ /// Query the current value of the @c blocking property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::query customisation point.
+ *
+ * For example:
+ * @code auto ex = my_io_context.get_executor();
+ * if (boost::asio::query(ex, boost::asio::execution::blocking)
+ * == boost::asio::execution::blocking.always)
+ * ... @endcode
+ */
+ BOOST_ASIO_CONSTEXPR execution::blocking_t query(
+ execution::blocking_t) const BOOST_ASIO_NOEXCEPT
+ {
+ return (bits_ & blocking_never)
+ ? execution::blocking_t(execution::blocking.never)
+ : execution::blocking_t(execution::blocking.possibly);
+ }
+
+ /// Query the current value of the @c relationship property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::query customisation point.
+ *
+ * For example:
+ * @code auto ex = my_io_context.get_executor();
+ * if (boost::asio::query(ex, boost::asio::execution::relationship)
+ * == boost::asio::execution::relationship.continuation)
+ * ... @endcode
+ */
+ BOOST_ASIO_CONSTEXPR execution::relationship_t query(
+ execution::relationship_t) const BOOST_ASIO_NOEXCEPT
+ {
+ return (bits_ & relationship_continuation)
+ ? execution::relationship_t(execution::relationship.continuation)
+ : execution::relationship_t(execution::relationship.fork);
+ }
+
+ /// Query the current value of the @c outstanding_work property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::query customisation point.
+ *
+ * For example:
+ * @code auto ex = my_io_context.get_executor();
+ * if (boost::asio::query(ex, boost::asio::execution::outstanding_work)
+ * == boost::asio::execution::outstanding_work.tracked)
+ * ... @endcode
+ */
+ static BOOST_ASIO_CONSTEXPR execution::outstanding_work_t query(
+ execution::outstanding_work_t) BOOST_ASIO_NOEXCEPT
+ {
+ return (Bits & outstanding_work_tracked)
+ ? execution::outstanding_work_t(execution::outstanding_work.tracked)
+ : execution::outstanding_work_t(execution::outstanding_work.untracked);
+ }
+
+ /// Query the current value of the @c allocator property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::query customisation point.
+ *
+ * For example:
+ * @code auto ex = my_io_context.get_executor();
+ * auto alloc = boost::asio::query(ex,
+ * boost::asio::execution::allocator); @endcode
+ */
+ template <typename OtherAllocator>
+ BOOST_ASIO_CONSTEXPR Allocator query(
+ execution::allocator_t<OtherAllocator>) const BOOST_ASIO_NOEXCEPT
+ {
+ return allocator_;
+ }
+
+ /// Query the current value of the @c allocator property.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * boost::asio::query customisation point.
+ *
+ * For example:
+ * @code auto ex = my_io_context.get_executor();
+ * auto alloc = boost::asio::query(ex,
+ * boost::asio::execution::allocator); @endcode
+ */
+ BOOST_ASIO_CONSTEXPR Allocator query(
+ execution::allocator_t<void>) const BOOST_ASIO_NOEXCEPT
+ {
+ return allocator_;
+ }
+
+ /// Determine whether the io_context is running in the current thread.
+ /**
+ * @return @c true if the current thread is running the io_context. Otherwise
+ * returns @c false.
+ */
+ bool running_in_this_thread() const BOOST_ASIO_NOEXCEPT;
+
+ /// Compare two executors for equality.
+ /**
+ * Two executors are equal if they refer to the same underlying io_context.
+ */
+ friend bool operator==(const basic_executor_type& a,
+ const basic_executor_type& b) BOOST_ASIO_NOEXCEPT
+ {
+ return a.io_context_ == b.io_context_
+ && a.allocator_ == b.allocator_
+ && a.bits_ == b.bits_;
+ }
+
+ /// Compare two executors for inequality.
+ /**
+ * Two executors are equal if they refer to the same underlying io_context.
+ */
+ friend bool operator!=(const basic_executor_type& a,
+ const basic_executor_type& b) BOOST_ASIO_NOEXCEPT
+ {
+ return a.io_context_ != b.io_context_
+ || a.allocator_ != b.allocator_
+ || a.bits_ != b.bits_;
+ }
+
+ /// Execution function.
+ /**
+ * Do not call this function directly. It is intended for use with the
+ * execution::execute customisation point.
+ *
+ * For example:
+ * @code auto ex = my_io_context.get_executor();
+ * execution::execute(ex, my_function_object); @endcode
+ */
+ template <typename Function>
+ void execute(BOOST_ASIO_MOVE_ARG(Function) f) const;
+
+#if !defined(BOOST_ASIO_NO_TS_EXECUTORS)
/// Obtain the underlying execution context.
io_context& context() const BOOST_ASIO_NOEXCEPT;
* @param a An allocator that may be used by the executor to allocate the
* internal storage needed for function invocation.
*/
- template <typename Function, typename Allocator>
- void dispatch(BOOST_ASIO_MOVE_ARG(Function) f, const Allocator& a) const;
+ template <typename Function, typename OtherAllocator>
+ void dispatch(BOOST_ASIO_MOVE_ARG(Function) f,
+ const OtherAllocator& a) const;
/// Request the io_context to invoke the given function object.
/**
* @param a An allocator that may be used by the executor to allocate the
* internal storage needed for function invocation.
*/
- template <typename Function, typename Allocator>
- void post(BOOST_ASIO_MOVE_ARG(Function) f, const Allocator& a) const;
+ template <typename Function, typename OtherAllocator>
+ void post(BOOST_ASIO_MOVE_ARG(Function) f,
+ const OtherAllocator& a) const;
/// Request the io_context to invoke the given function object.
/**
* @param a An allocator that may be used by the executor to allocate the
* internal storage needed for function invocation.
*/
- template <typename Function, typename Allocator>
- void defer(BOOST_ASIO_MOVE_ARG(Function) f, const Allocator& a) const;
+ template <typename Function, typename OtherAllocator>
+ void defer(BOOST_ASIO_MOVE_ARG(Function) f,
+ const OtherAllocator& a) const;
+#endif // !defined(BOOST_ASIO_NO_TS_EXECUTORS)
- /// Determine whether the io_context is running in the current thread.
- /**
- * @return @c true if the current thread is running the io_context. Otherwise
- * returns @c false.
- */
- bool running_in_this_thread() const BOOST_ASIO_NOEXCEPT;
+private:
+ friend class io_context;
+ template <typename, unsigned int> friend class basic_executor_type;
- /// Compare two executors for equality.
- /**
- * Two executors are equal if they refer to the same underlying io_context.
- */
- friend bool operator==(const executor_type& a,
- const executor_type& b) BOOST_ASIO_NOEXCEPT
+ // Constructor used by io_context::get_executor().
+ explicit basic_executor_type(io_context& i) BOOST_ASIO_NOEXCEPT
+ : io_context_(&i),
+ allocator_(),
+ bits_(0)
{
- return &a.io_context_ == &b.io_context_;
+ if (Bits & outstanding_work_tracked)
+ io_context_->impl_.work_started();
}
- /// Compare two executors for inequality.
- /**
- * Two executors are equal if they refer to the same underlying io_context.
- */
- friend bool operator!=(const executor_type& a,
- const executor_type& b) BOOST_ASIO_NOEXCEPT
+ // Constructor used by require().
+ basic_executor_type(io_context* i,
+ const Allocator& a, unsigned int bits) BOOST_ASIO_NOEXCEPT
+ : io_context_(i),
+ allocator_(a),
+ bits_(bits)
{
- return &a.io_context_ != &b.io_context_;
+ if (Bits & outstanding_work_tracked)
+ if (io_context_)
+ io_context_->impl_.work_started();
}
-private:
- friend class io_context;
+ // The underlying io_context.
+ io_context* io_context_;
- // Constructor.
- explicit executor_type(io_context& i) : io_context_(i) {}
+ // The allocator used for execution functions.
+ Allocator allocator_;
- // The underlying io_context.
- io_context& io_context_;
+ // The runtime-switched properties of the io_context executor.
+ unsigned int bits_;
};
#if !defined(BOOST_ASIO_NO_DEPRECATED)
boost::asio::detail::service_id<Type> service_base<Type>::id;
} // namespace detail
+
+#if !defined(GENERATING_DOCUMENTATION)
+
+namespace traits {
+
+#if !defined(BOOST_ASIO_HAS_DEDUCED_EQUALITY_COMPARABLE_TRAIT)
+
+template <typename Allocator, unsigned int Bits>
+struct equality_comparable<
+ boost::asio::io_context::basic_executor_type<Allocator, Bits>
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
+};
+
+#endif // !defined(BOOST_ASIO_HAS_DEDUCED_EQUALITY_COMPARABLE_TRAIT)
+
+#if !defined(BOOST_ASIO_HAS_DEDUCED_EXECUTE_MEMBER_TRAIT)
+
+template <typename Allocator, unsigned int Bits, typename Function>
+struct execute_member<
+ boost::asio::io_context::basic_executor_type<Allocator, Bits>,
+ Function
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
+ typedef void result_type;
+};
+
+#endif // !defined(BOOST_ASIO_HAS_DEDUCED_EXECUTE_MEMBER_TRAIT)
+
+#if !defined(BOOST_ASIO_HAS_DEDUCED_REQUIRE_MEMBER_TRAIT)
+
+template <typename Allocator, unsigned int Bits>
+struct require_member<
+ boost::asio::io_context::basic_executor_type<Allocator, Bits>,
+ boost::asio::execution::blocking_t::possibly_t
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
+ typedef boost::asio::io_context::basic_executor_type<
+ Allocator, Bits> result_type;
+};
+
+template <typename Allocator, unsigned int Bits>
+struct require_member<
+ boost::asio::io_context::basic_executor_type<Allocator, Bits>,
+ boost::asio::execution::blocking_t::never_t
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
+ typedef boost::asio::io_context::basic_executor_type<
+ Allocator, Bits> result_type;
+};
+
+template <typename Allocator, unsigned int Bits>
+struct require_member<
+ boost::asio::io_context::basic_executor_type<Allocator, Bits>,
+ boost::asio::execution::relationship_t::fork_t
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
+ typedef boost::asio::io_context::basic_executor_type<
+ Allocator, Bits> result_type;
+};
+
+template <typename Allocator, unsigned int Bits>
+struct require_member<
+ boost::asio::io_context::basic_executor_type<Allocator, Bits>,
+ boost::asio::execution::relationship_t::continuation_t
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
+ typedef boost::asio::io_context::basic_executor_type<
+ Allocator, Bits> result_type;
+};
+
+template <typename Allocator, unsigned int 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
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
+ typedef boost::asio::io_context::basic_executor_type<
+ Allocator, Bits | outstanding_work_tracked> result_type;
+};
+
+template <typename Allocator, unsigned int 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
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
+ typedef boost::asio::io_context::basic_executor_type<
+ Allocator, Bits & ~outstanding_work_tracked> result_type;
+};
+
+template <typename Allocator, unsigned int Bits>
+struct require_member<
+ boost::asio::io_context::basic_executor_type<Allocator, Bits>,
+ boost::asio::execution::allocator_t<void>
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
+ typedef boost::asio::io_context::basic_executor_type<
+ std::allocator<void>, Bits> result_type;
+};
+
+template <unsigned int Bits,
+ typename Allocator, typename OtherAllocator>
+struct require_member<
+ boost::asio::io_context::basic_executor_type<Allocator, Bits>,
+ boost::asio::execution::allocator_t<OtherAllocator>
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = false);
+ typedef boost::asio::io_context::basic_executor_type<
+ OtherAllocator, Bits> result_type;
+};
+
+#endif // !defined(BOOST_ASIO_HAS_DEDUCED_REQUIRE_MEMBER_TRAIT)
+
+#if !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
+
+template <typename Allocator, unsigned int 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
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
+ typedef boost::asio::execution::outstanding_work_t result_type;
+
+ static BOOST_ASIO_CONSTEXPR result_type value() BOOST_ASIO_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, unsigned int 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
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
+ typedef boost::asio::execution::mapping_t::thread_t result_type;
+
+ static BOOST_ASIO_CONSTEXPR result_type value() BOOST_ASIO_NOEXCEPT
+ {
+ return result_type();
+ }
+};
+
+#endif // !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_STATIC_CONSTEXPR_MEMBER_TRAIT)
+
+#if !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
+
+template <typename Allocator, unsigned int 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
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
+ typedef boost::asio::execution::blocking_t result_type;
+};
+
+template <typename Allocator, unsigned int 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
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
+ typedef boost::asio::execution::relationship_t result_type;
+};
+
+template <typename Allocator, unsigned int Bits>
+struct query_member<
+ boost::asio::io_context::basic_executor_type<Allocator, Bits>,
+ boost::asio::execution::context_t
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
+ typedef boost::asio::io_context& result_type;
+};
+
+template <typename Allocator, unsigned int Bits>
+struct query_member<
+ boost::asio::io_context::basic_executor_type<Allocator, Bits>,
+ boost::asio::execution::allocator_t<void>
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
+ typedef Allocator result_type;
+};
+
+template <typename Allocator, unsigned int Bits, typename OtherAllocator>
+struct query_member<
+ boost::asio::io_context::basic_executor_type<Allocator, Bits>,
+ boost::asio::execution::allocator_t<OtherAllocator>
+ >
+{
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_valid = true);
+ BOOST_ASIO_STATIC_CONSTEXPR(bool, is_noexcept = true);
+ typedef Allocator result_type;
+};
+
+#endif // !defined(BOOST_ASIO_HAS_DEDUCED_QUERY_MEMBER_TRAIT)
+
+} // namespace traits
+
+#endif // !defined(GENERATING_DOCUMENTATION)
+
} // namespace asio
} // namespace boost
projects / ceph.git / blobdiff