asio/include/asio/detail/reactive_socket_service_base.hpp - third_party/asio - Git at Google

 //
 // detail/reactive_socket_service_base.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_DETAIL_REACTIVE_SOCKET_SERVICE_BASE_HPP
 #define ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_BASE_HPP

 #if defined(_MSC_VER) && (_MSC_VER >= 1200)
 # pragma once
 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

 #include "asio/detail/config.hpp"

 #if !defined(ASIO_HAS_IOCP) \
   && !defined(ASIO_WINDOWS_RUNTIME)

 #include "asio/buffer.hpp"
 #include "asio/error.hpp"
 #include "asio/io_context.hpp"
 #include "asio/socket_base.hpp"
 #include "asio/detail/buffer_sequence_adapter.hpp"
 #include "asio/detail/memory.hpp"
 #include "asio/detail/reactive_null_buffers_op.hpp"
 #include "asio/detail/reactive_socket_recv_op.hpp"
 #include "asio/detail/reactive_socket_recvmsg_op.hpp"
 #include "asio/detail/reactive_socket_send_op.hpp"
 #include "asio/detail/reactive_wait_op.hpp"
 #include "asio/detail/reactor.hpp"
 #include "asio/detail/reactor_op.hpp"
 #include "asio/detail/socket_holder.hpp"
 #include "asio/detail/socket_ops.hpp"
 #include "asio/detail/socket_types.hpp"

 #include "asio/detail/push_options.hpp"

 namespace asio {
 namespace detail {

 class reactive_socket_service_base
 {
 public:
   // The native type of a socket.
   typedef socket_type native_handle_type;

   // The implementation type of the socket.
   struct base_implementation_type
   {
     // The native socket representation.
     socket_type socket_;

     // The current state of the socket.
     socket_ops::state_type state_;

     // Per-descriptor data used by the reactor.
     reactor::per_descriptor_data reactor_data_;
   };

   // Constructor.
   ASIO_DECL reactive_socket_service_base(
       asio::io_context& io_context);

   // Destroy all user-defined handler objects owned by the service.
   ASIO_DECL void shutdown();

   // Construct a new socket implementation.
   ASIO_DECL void construct(base_implementation_type& impl);

   // Move-construct a new socket implementation.
   ASIO_DECL void base_move_construct(base_implementation_type& impl,
       base_implementation_type& other_impl);

   // Move-assign from another socket implementation.
   ASIO_DECL void base_move_assign(base_implementation_type& impl,
       reactive_socket_service_base& other_service,
       base_implementation_type& other_impl);

   // Destroy a socket implementation.
   ASIO_DECL void destroy(base_implementation_type& impl);

   // Determine whether the socket is open.
   bool is_open(const base_implementation_type& impl) const
   {
     return impl.socket_ != invalid_socket;
   }

   // Destroy a socket implementation.
   ASIO_DECL asio::error_code close(
       base_implementation_type& impl, asio::error_code& ec);

   // Get the native socket representation.
   native_handle_type native_handle(base_implementation_type& impl)
   {
     return impl.socket_;
   }

   // Cancel all operations associated with the socket.
   ASIO_DECL asio::error_code cancel(
       base_implementation_type& impl, asio::error_code& ec);

   // Determine whether the socket is at the out-of-band data mark.
   bool at_mark(const base_implementation_type& impl,
       asio::error_code& ec) const
   {
     return socket_ops::sockatmark(impl.socket_, ec);
   }

   // Determine the number of bytes available for reading.
   std::size_t available(const base_implementation_type& impl,
       asio::error_code& ec) const
   {
     return socket_ops::available(impl.socket_, ec);
   }

   // Place the socket into the state where it will listen for new connections.
   asio::error_code listen(base_implementation_type& impl,
       int backlog, asio::error_code& ec)
   {
     socket_ops::listen(impl.socket_, backlog, ec);
     return ec;
   }

   // Perform an IO control command on the socket.
   template <typename IO_Control_Command>
   asio::error_code io_control(base_implementation_type& impl,
       IO_Control_Command& command, asio::error_code& ec)
   {
     socket_ops::ioctl(impl.socket_, impl.state_, command.name(),
         static_cast<ioctl_arg_type*>(command.data()), ec);
     return ec;
   }

   // Gets the non-blocking mode of the socket.
   bool non_blocking(const base_implementation_type& impl) const
   {
     return (impl.state_ & socket_ops::user_set_non_blocking) != 0;
   }

   // Sets the non-blocking mode of the socket.
   asio::error_code non_blocking(base_implementation_type& impl,
       bool mode, asio::error_code& ec)
   {
     socket_ops::set_user_non_blocking(impl.socket_, impl.state_, mode, ec);
     return ec;
   }

   // Gets the non-blocking mode of the native socket implementation.
   bool native_non_blocking(const base_implementation_type& impl) const
   {
     return (impl.state_ & socket_ops::internal_non_blocking) != 0;
   }

   // Sets the non-blocking mode of the native socket implementation.
   asio::error_code native_non_blocking(base_implementation_type& impl,
       bool mode, asio::error_code& ec)
   {
     socket_ops::set_internal_non_blocking(impl.socket_, impl.state_, mode, ec);
     return ec;
   }

   // Disable sends or receives on the socket.
   asio::error_code shutdown(base_implementation_type& impl,
       socket_base::shutdown_type what, asio::error_code& ec)
   {
     socket_ops::shutdown(impl.socket_, what, ec);
     return ec;
   }

   // Wait for the socket to become ready to read, ready to write, or to have
   // pending error conditions.
   asio::error_code wait(base_implementation_type& impl,
       socket_base::wait_type w, asio::error_code& ec)
   {
     switch (w)
     {
     case socket_base::wait_read:
       socket_ops::poll_read(impl.socket_, impl.state_, ec);
       break;
     case socket_base::wait_write:
       socket_ops::poll_write(impl.socket_, impl.state_, ec);
       break;
     case socket_base::wait_error:
       socket_ops::poll_error(impl.socket_, impl.state_, ec);
       break;
     default:
       ec = asio::error::invalid_argument;
       break;
     }

     return ec;
   }

   // Asynchronously wait for the socket to become ready to read, ready to
   // write, or to have pending error conditions.
   template <typename Handler>
   void async_wait(base_implementation_type& impl,
       socket_base::wait_type w, Handler& handler)
   {
     bool is_continuation =
       asio_handler_cont_helpers::is_continuation(handler);

     // Allocate and construct an operation to wrap the handler.
     typedef reactive_wait_op<Handler> op;
     typename op::ptr p = { asio::detail::addressof(handler),
       op::ptr::allocate(handler), 0 };
     p.p = new (p.v) op(handler);

     ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
           &impl, impl.socket_, "async_wait"));

     int op_type;
     switch (w)
     {
       case socket_base::wait_read:
         op_type = reactor::read_op;
         break;
       case socket_base::wait_write:
         op_type = reactor::write_op;
         break;
       case socket_base::wait_error:
         op_type = reactor::except_op;
         break;
       default:
         p.p->ec_ = asio::error::invalid_argument;
         reactor_.post_immediate_completion(p.p, is_continuation);
         p.v = p.p = 0;
         return;
     }

     start_op(impl, op_type, p.p, is_continuation, false, false);
     p.v = p.p = 0;
   }

   // Send the given data to the peer.
   template <typename ConstBufferSequence>
   size_t send(base_implementation_type& impl,
       const ConstBufferSequence& buffers,
       socket_base::message_flags flags, asio::error_code& ec)
   {
     buffer_sequence_adapter<asio::const_buffer,
         ConstBufferSequence> bufs(buffers);

     return socket_ops::sync_send(impl.socket_, impl.state_,
         bufs.buffers(), bufs.count(), flags, bufs.all_empty(), ec);
   }

   // Wait until data can be sent without blocking.
   size_t send(base_implementation_type& impl, const null_buffers&,
       socket_base::message_flags, asio::error_code& ec)
   {
     // Wait for socket to become ready.
     socket_ops::poll_write(impl.socket_, impl.state_, ec);

     return 0;
   }

   // Start an asynchronous send. The data being sent must be valid for the
   // lifetime of the asynchronous operation.
   template <typename ConstBufferSequence, typename Handler>
   void async_send(base_implementation_type& impl,
       const ConstBufferSequence& buffers,
       socket_base::message_flags flags, Handler& handler)
   {
     bool is_continuation =
       asio_handler_cont_helpers::is_continuation(handler);

     // Allocate and construct an operation to wrap the handler.
     typedef reactive_socket_send_op<ConstBufferSequence, Handler> op;
     typename op::ptr p = { asio::detail::addressof(handler),
       op::ptr::allocate(handler), 0 };
     p.p = new (p.v) op(impl.socket_, buffers, flags, handler);

     ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
           &impl, impl.socket_, "async_send"));

     start_op(impl, reactor::write_op, p.p, is_continuation, true,
         ((impl.state_ & socket_ops::stream_oriented)
           && buffer_sequence_adapter<asio::const_buffer,
             ConstBufferSequence>::all_empty(buffers)));
     p.v = p.p = 0;
   }

   // Start an asynchronous wait until data can be sent without blocking.
   template <typename Handler>
   void async_send(base_implementation_type& impl, const null_buffers&,
       socket_base::message_flags, Handler& handler)
   {
     bool is_continuation =
       asio_handler_cont_helpers::is_continuation(handler);

     // Allocate and construct an operation to wrap the handler.
     typedef reactive_null_buffers_op<Handler> op;
     typename op::ptr p = { asio::detail::addressof(handler),
       op::ptr::allocate(handler), 0 };
     p.p = new (p.v) op(handler);

     ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
           &impl, impl.socket_, "async_send(null_buffers)"));

     start_op(impl, reactor::write_op, p.p, is_continuation, false, false);
     p.v = p.p = 0;
   }

   // Receive some data from the peer. Returns the number of bytes received.
   template <typename MutableBufferSequence>
   size_t receive(base_implementation_type& impl,
       const MutableBufferSequence& buffers,
       socket_base::message_flags flags, asio::error_code& ec)
   {
     buffer_sequence_adapter<asio::mutable_buffer,
         MutableBufferSequence> bufs(buffers);

     return socket_ops::sync_recv(impl.socket_, impl.state_,
         bufs.buffers(), bufs.count(), flags, bufs.all_empty(), ec);
   }

   // Wait until data can be received without blocking.
   size_t receive(base_implementation_type& impl, const null_buffers&,
       socket_base::message_flags, asio::error_code& ec)
   {
     // Wait for socket to become ready.
     socket_ops::poll_read(impl.socket_, impl.state_, ec);

     return 0;
   }

   // Start an asynchronous receive. The buffer for the data being received
   // must be valid for the lifetime of the asynchronous operation.
   template <typename MutableBufferSequence, typename Handler>
   void async_receive(base_implementation_type& impl,
       const MutableBufferSequence& buffers,
       socket_base::message_flags flags, Handler& handler)
   {
     bool is_continuation =
       asio_handler_cont_helpers::is_continuation(handler);

     // Allocate and construct an operation to wrap the handler.
     typedef reactive_socket_recv_op<MutableBufferSequence, Handler> op;
     typename op::ptr p = { asio::detail::addressof(handler),
       op::ptr::allocate(handler), 0 };
     p.p = new (p.v) op(impl.socket_, impl.state_, buffers, flags, handler);

     ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
           &impl, impl.socket_, "async_receive"));

     start_op(impl,
         (flags & socket_base::message_out_of_band)
           ? reactor::except_op : reactor::read_op,
         p.p, is_continuation,
         (flags & socket_base::message_out_of_band) == 0,
         ((impl.state_ & socket_ops::stream_oriented)
           && buffer_sequence_adapter<asio::mutable_buffer,
             MutableBufferSequence>::all_empty(buffers)));
     p.v = p.p = 0;
   }

   // Wait until data can be received without blocking.
   template <typename Handler>
   void async_receive(base_implementation_type& impl, const null_buffers&,
       socket_base::message_flags flags, Handler& handler)
   {
     bool is_continuation =
       asio_handler_cont_helpers::is_continuation(handler);

     // Allocate and construct an operation to wrap the handler.
     typedef reactive_null_buffers_op<Handler> op;
     typename op::ptr p = { asio::detail::addressof(handler),
       op::ptr::allocate(handler), 0 };
     p.p = new (p.v) op(handler);

     ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
           &impl, impl.socket_, "async_receive(null_buffers)"));

     start_op(impl,
         (flags & socket_base::message_out_of_band)
           ? reactor::except_op : reactor::read_op,
         p.p, is_continuation, false, false);
     p.v = p.p = 0;
   }

   // Receive some data with associated flags. Returns the number of bytes
   // received.
   template <typename MutableBufferSequence>
   size_t receive_with_flags(base_implementation_type& impl,
       const MutableBufferSequence& buffers,
       socket_base::message_flags in_flags,
       socket_base::message_flags& out_flags, asio::error_code& ec)
   {
     buffer_sequence_adapter<asio::mutable_buffer,
         MutableBufferSequence> bufs(buffers);

     return socket_ops::sync_recvmsg(impl.socket_, impl.state_,
         bufs.buffers(), bufs.count(), in_flags, out_flags, ec);
   }

   // Wait until data can be received without blocking.
   size_t receive_with_flags(base_implementation_type& impl,
       const null_buffers&, socket_base::message_flags,
       socket_base::message_flags& out_flags, asio::error_code& ec)
   {
     // Wait for socket to become ready.
     socket_ops::poll_read(impl.socket_, impl.state_, ec);

     // Clear out_flags, since we cannot give it any other sensible value when
     // performing a null_buffers operation.
     out_flags = 0;

     return 0;
   }

   // Start an asynchronous receive. The buffer for the data being received
   // must be valid for the lifetime of the asynchronous operation.
   template <typename MutableBufferSequence, typename Handler>
   void async_receive_with_flags(base_implementation_type& impl,
       const MutableBufferSequence& buffers, socket_base::message_flags in_flags,
       socket_base::message_flags& out_flags, Handler& handler)
   {
     bool is_continuation =
       asio_handler_cont_helpers::is_continuation(handler);

     // Allocate and construct an operation to wrap the handler.
     typedef reactive_socket_recvmsg_op<MutableBufferSequence, Handler> op;
     typename op::ptr p = { asio::detail::addressof(handler),
       op::ptr::allocate(handler), 0 };
     p.p = new (p.v) op(impl.socket_, buffers, in_flags, out_flags, handler);

     ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
           &impl, impl.socket_, "async_receive_with_flags"));

     start_op(impl,
         (in_flags & socket_base::message_out_of_band)
           ? reactor::except_op : reactor::read_op,
         p.p, is_continuation,
         (in_flags & socket_base::message_out_of_band) == 0, false);
     p.v = p.p = 0;
   }

   // Wait until data can be received without blocking.
   template <typename Handler>
   void async_receive_with_flags(base_implementation_type& impl,
       const null_buffers&, socket_base::message_flags in_flags,
       socket_base::message_flags& out_flags, Handler& handler)
   {
     bool is_continuation =
       asio_handler_cont_helpers::is_continuation(handler);

     // Allocate and construct an operation to wrap the handler.
     typedef reactive_null_buffers_op<Handler> op;
     typename op::ptr p = { asio::detail::addressof(handler),
       op::ptr::allocate(handler), 0 };
     p.p = new (p.v) op(handler);

     ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
           &impl, impl.socket_, "async_receive_with_flags(null_buffers)"));

     // Clear out_flags, since we cannot give it any other sensible value when
     // performing a null_buffers operation.
     out_flags = 0;

     start_op(impl,
         (in_flags & socket_base::message_out_of_band)
           ? reactor::except_op : reactor::read_op,
         p.p, is_continuation, false, false);
     p.v = p.p = 0;
   }

 protected:
   // Open a new socket implementation.
   ASIO_DECL asio::error_code do_open(
       base_implementation_type& impl, int af,
       int type, int protocol, asio::error_code& ec);

   // Assign a native socket to a socket implementation.
   ASIO_DECL asio::error_code do_assign(
       base_implementation_type& impl, int type,
       const native_handle_type& native_socket, asio::error_code& ec);

   // Start the asynchronous read or write operation.
   ASIO_DECL void start_op(base_implementation_type& impl, int op_type,
       reactor_op* op, bool is_continuation, bool is_non_blocking, bool noop);

   // Start the asynchronous accept operation.
   ASIO_DECL void start_accept_op(base_implementation_type& impl,
       reactor_op* op, bool is_continuation, bool peer_is_open);

   // Start the asynchronous connect operation.
   ASIO_DECL void start_connect_op(base_implementation_type& impl,
       reactor_op* op, bool is_continuation,
       const socket_addr_type* addr, size_t addrlen);

   // The io_context that owns this socket service.
   io_context& io_context_;

   // The selector that performs event demultiplexing for the service.
   reactor& reactor_;
 };

 } // namespace detail
 } // namespace asio

 #include "asio/detail/pop_options.hpp"

 #if defined(ASIO_HEADER_ONLY)
 # include "asio/detail/impl/reactive_socket_service_base.ipp"
 #endif // defined(ASIO_HEADER_ONLY)

 #endif // !defined(ASIO_HAS_IOCP)
        //   && !defined(ASIO_WINDOWS_RUNTIME)

 #endif // ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_BASE_HPP
	//
	// detail/reactive_socket_service_base.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_DETAIL_REACTIVE_SOCKET_SERVICE_BASE_HPP
	#define ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_BASE_HPP

	#if defined(_MSC_VER) && (_MSC_VER >= 1200)
	# pragma once
	#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

	#include "asio/detail/config.hpp"

	#if !defined(ASIO_HAS_IOCP) \
	&& !defined(ASIO_WINDOWS_RUNTIME)

	#include "asio/buffer.hpp"
	#include "asio/error.hpp"
	#include "asio/io_context.hpp"
	#include "asio/socket_base.hpp"
	#include "asio/detail/buffer_sequence_adapter.hpp"
	#include "asio/detail/memory.hpp"
	#include "asio/detail/reactive_null_buffers_op.hpp"
	#include "asio/detail/reactive_socket_recv_op.hpp"
	#include "asio/detail/reactive_socket_recvmsg_op.hpp"
	#include "asio/detail/reactive_socket_send_op.hpp"
	#include "asio/detail/reactive_wait_op.hpp"
	#include "asio/detail/reactor.hpp"
	#include "asio/detail/reactor_op.hpp"
	#include "asio/detail/socket_holder.hpp"
	#include "asio/detail/socket_ops.hpp"
	#include "asio/detail/socket_types.hpp"

	#include "asio/detail/push_options.hpp"

	namespace asio {
	namespace detail {

	class reactive_socket_service_base
	{
	public:
	// The native type of a socket.
	typedef socket_type native_handle_type;

	// The implementation type of the socket.
	struct base_implementation_type
	{
	// The native socket representation.
	socket_type socket_;

	// The current state of the socket.
	socket_ops::state_type state_;

	// Per-descriptor data used by the reactor.
	reactor::per_descriptor_data reactor_data_;
	};

	// Constructor.
	ASIO_DECL reactive_socket_service_base(
	asio::io_context& io_context);

	// Destroy all user-defined handler objects owned by the service.
	ASIO_DECL void shutdown();

	// Construct a new socket implementation.
	ASIO_DECL void construct(base_implementation_type& impl);

	// Move-construct a new socket implementation.
	ASIO_DECL void base_move_construct(base_implementation_type& impl,
	base_implementation_type& other_impl);

	// Move-assign from another socket implementation.
	ASIO_DECL void base_move_assign(base_implementation_type& impl,
	reactive_socket_service_base& other_service,
	base_implementation_type& other_impl);

	// Destroy a socket implementation.
	ASIO_DECL void destroy(base_implementation_type& impl);

	// Determine whether the socket is open.
	bool is_open(const base_implementation_type& impl) const
	{
	return impl.socket_ != invalid_socket;
	}

	// Destroy a socket implementation.
	ASIO_DECL asio::error_code close(
	base_implementation_type& impl, asio::error_code& ec);

	// Get the native socket representation.
	native_handle_type native_handle(base_implementation_type& impl)
	{
	return impl.socket_;
	}

	// Cancel all operations associated with the socket.
	ASIO_DECL asio::error_code cancel(
	base_implementation_type& impl, asio::error_code& ec);

	// Determine whether the socket is at the out-of-band data mark.
	bool at_mark(const base_implementation_type& impl,
	asio::error_code& ec) const
	{
	return socket_ops::sockatmark(impl.socket_, ec);
	}

	// Determine the number of bytes available for reading.
	std::size_t available(const base_implementation_type& impl,
	asio::error_code& ec) const
	{
	return socket_ops::available(impl.socket_, ec);
	}

	// Place the socket into the state where it will listen for new connections.
	asio::error_code listen(base_implementation_type& impl,
	int backlog, asio::error_code& ec)
	{
	socket_ops::listen(impl.socket_, backlog, ec);
	return ec;
	}

	// Perform an IO control command on the socket.
	template <typename IO_Control_Command>
	asio::error_code io_control(base_implementation_type& impl,
	IO_Control_Command& command, asio::error_code& ec)
	{
	socket_ops::ioctl(impl.socket_, impl.state_, command.name(),
	static_cast<ioctl_arg_type*>(command.data()), ec);
	return ec;
	}

	// Gets the non-blocking mode of the socket.
	bool non_blocking(const base_implementation_type& impl) const
	{
	return (impl.state_ & socket_ops::user_set_non_blocking) != 0;
	}

	// Sets the non-blocking mode of the socket.
	asio::error_code non_blocking(base_implementation_type& impl,
	bool mode, asio::error_code& ec)
	{
	socket_ops::set_user_non_blocking(impl.socket_, impl.state_, mode, ec);
	return ec;
	}

	// Gets the non-blocking mode of the native socket implementation.
	bool native_non_blocking(const base_implementation_type& impl) const
	{
	return (impl.state_ & socket_ops::internal_non_blocking) != 0;
	}

	// Sets the non-blocking mode of the native socket implementation.
	asio::error_code native_non_blocking(base_implementation_type& impl,
	bool mode, asio::error_code& ec)
	{
	socket_ops::set_internal_non_blocking(impl.socket_, impl.state_, mode, ec);
	return ec;
	}

	// Disable sends or receives on the socket.
	asio::error_code shutdown(base_implementation_type& impl,
	socket_base::shutdown_type what, asio::error_code& ec)
	{
	socket_ops::shutdown(impl.socket_, what, ec);
	return ec;
	}

	// Wait for the socket to become ready to read, ready to write, or to have
	// pending error conditions.
	asio::error_code wait(base_implementation_type& impl,
	socket_base::wait_type w, asio::error_code& ec)
	{
	switch (w)
	{
	case socket_base::wait_read:
	socket_ops::poll_read(impl.socket_, impl.state_, ec);
	break;
	case socket_base::wait_write:
	socket_ops::poll_write(impl.socket_, impl.state_, ec);
	break;
	case socket_base::wait_error:
	socket_ops::poll_error(impl.socket_, impl.state_, ec);
	break;
	default:
	ec = asio::error::invalid_argument;
	break;
	}

	return ec;
	}

	// Asynchronously wait for the socket to become ready to read, ready to
	// write, or to have pending error conditions.
	template <typename Handler>
	void async_wait(base_implementation_type& impl,
	socket_base::wait_type w, Handler& handler)
	{
	bool is_continuation =
	asio_handler_cont_helpers::is_continuation(handler);

	// Allocate and construct an operation to wrap the handler.
	typedef reactive_wait_op<Handler> op;
	typename op::ptr p = { asio::detail::addressof(handler),
	op::ptr::allocate(handler), 0 };
	p.p = new (p.v) op(handler);

	ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
	&impl, impl.socket_, "async_wait"));

	int op_type;
	switch (w)
	{
	case socket_base::wait_read:
	op_type = reactor::read_op;
	break;
	case socket_base::wait_write:
	op_type = reactor::write_op;
	break;
	case socket_base::wait_error:
	op_type = reactor::except_op;
	break;
	default:
	p.p->ec_ = asio::error::invalid_argument;
	reactor_.post_immediate_completion(p.p, is_continuation);
	p.v = p.p = 0;
	return;
	}

	start_op(impl, op_type, p.p, is_continuation, false, false);
	p.v = p.p = 0;
	}

	// Send the given data to the peer.
	template <typename ConstBufferSequence>
	size_t send(base_implementation_type& impl,
	const ConstBufferSequence& buffers,
	socket_base::message_flags flags, asio::error_code& ec)
	{
	buffer_sequence_adapter<asio::const_buffer,
	ConstBufferSequence> bufs(buffers);

	return socket_ops::sync_send(impl.socket_, impl.state_,
	bufs.buffers(), bufs.count(), flags, bufs.all_empty(), ec);
	}

	// Wait until data can be sent without blocking.
	size_t send(base_implementation_type& impl, const null_buffers&,
	socket_base::message_flags, asio::error_code& ec)
	{
	// Wait for socket to become ready.
	socket_ops::poll_write(impl.socket_, impl.state_, ec);

	return 0;
	}

	// Start an asynchronous send. The data being sent must be valid for the
	// lifetime of the asynchronous operation.
	template <typename ConstBufferSequence, typename Handler>
	void async_send(base_implementation_type& impl,
	const ConstBufferSequence& buffers,
	socket_base::message_flags flags, Handler& handler)
	{
	bool is_continuation =
	asio_handler_cont_helpers::is_continuation(handler);

	// Allocate and construct an operation to wrap the handler.
	typedef reactive_socket_send_op<ConstBufferSequence, Handler> op;
	typename op::ptr p = { asio::detail::addressof(handler),
	op::ptr::allocate(handler), 0 };
	p.p = new (p.v) op(impl.socket_, buffers, flags, handler);

	ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
	&impl, impl.socket_, "async_send"));

	start_op(impl, reactor::write_op, p.p, is_continuation, true,
	((impl.state_ & socket_ops::stream_oriented)
	&& buffer_sequence_adapter<asio::const_buffer,
	ConstBufferSequence>::all_empty(buffers)));
	p.v = p.p = 0;
	}

	// Start an asynchronous wait until data can be sent without blocking.
	template <typename Handler>
	void async_send(base_implementation_type& impl, const null_buffers&,
	socket_base::message_flags, Handler& handler)
	{
	bool is_continuation =
	asio_handler_cont_helpers::is_continuation(handler);

	// Allocate and construct an operation to wrap the handler.
	typedef reactive_null_buffers_op<Handler> op;
	typename op::ptr p = { asio::detail::addressof(handler),
	op::ptr::allocate(handler), 0 };
	p.p = new (p.v) op(handler);

	ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
	&impl, impl.socket_, "async_send(null_buffers)"));

	start_op(impl, reactor::write_op, p.p, is_continuation, false, false);
	p.v = p.p = 0;
	}

	// Receive some data from the peer. Returns the number of bytes received.
	template <typename MutableBufferSequence>
	size_t receive(base_implementation_type& impl,
	const MutableBufferSequence& buffers,
	socket_base::message_flags flags, asio::error_code& ec)
	{
	buffer_sequence_adapter<asio::mutable_buffer,
	MutableBufferSequence> bufs(buffers);

	return socket_ops::sync_recv(impl.socket_, impl.state_,
	bufs.buffers(), bufs.count(), flags, bufs.all_empty(), ec);
	}

	// Wait until data can be received without blocking.
	size_t receive(base_implementation_type& impl, const null_buffers&,
	socket_base::message_flags, asio::error_code& ec)
	{
	// Wait for socket to become ready.
	socket_ops::poll_read(impl.socket_, impl.state_, ec);

	return 0;
	}

	// Start an asynchronous receive. The buffer for the data being received
	// must be valid for the lifetime of the asynchronous operation.
	template <typename MutableBufferSequence, typename Handler>
	void async_receive(base_implementation_type& impl,
	const MutableBufferSequence& buffers,
	socket_base::message_flags flags, Handler& handler)
	{
	bool is_continuation =
	asio_handler_cont_helpers::is_continuation(handler);

	// Allocate and construct an operation to wrap the handler.
	typedef reactive_socket_recv_op<MutableBufferSequence, Handler> op;
	typename op::ptr p = { asio::detail::addressof(handler),
	op::ptr::allocate(handler), 0 };
	p.p = new (p.v) op(impl.socket_, impl.state_, buffers, flags, handler);

	ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
	&impl, impl.socket_, "async_receive"));

	start_op(impl,
	(flags & socket_base::message_out_of_band)
	? reactor::except_op : reactor::read_op,
	p.p, is_continuation,
	(flags & socket_base::message_out_of_band) == 0,
	((impl.state_ & socket_ops::stream_oriented)
	&& buffer_sequence_adapter<asio::mutable_buffer,
	MutableBufferSequence>::all_empty(buffers)));
	p.v = p.p = 0;
	}

	// Wait until data can be received without blocking.
	template <typename Handler>
	void async_receive(base_implementation_type& impl, const null_buffers&,
	socket_base::message_flags flags, Handler& handler)
	{
	bool is_continuation =
	asio_handler_cont_helpers::is_continuation(handler);

	// Allocate and construct an operation to wrap the handler.
	typedef reactive_null_buffers_op<Handler> op;
	typename op::ptr p = { asio::detail::addressof(handler),
	op::ptr::allocate(handler), 0 };
	p.p = new (p.v) op(handler);

	ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
	&impl, impl.socket_, "async_receive(null_buffers)"));

	start_op(impl,
	(flags & socket_base::message_out_of_band)
	? reactor::except_op : reactor::read_op,
	p.p, is_continuation, false, false);
	p.v = p.p = 0;
	}

	// Receive some data with associated flags. Returns the number of bytes
	// received.
	template <typename MutableBufferSequence>
	size_t receive_with_flags(base_implementation_type& impl,
	const MutableBufferSequence& buffers,
	socket_base::message_flags in_flags,
	socket_base::message_flags& out_flags, asio::error_code& ec)
	{
	buffer_sequence_adapter<asio::mutable_buffer,
	MutableBufferSequence> bufs(buffers);

	return socket_ops::sync_recvmsg(impl.socket_, impl.state_,
	bufs.buffers(), bufs.count(), in_flags, out_flags, ec);
	}

	// Wait until data can be received without blocking.
	size_t receive_with_flags(base_implementation_type& impl,
	const null_buffers&, socket_base::message_flags,
	socket_base::message_flags& out_flags, asio::error_code& ec)
	{
	// Wait for socket to become ready.
	socket_ops::poll_read(impl.socket_, impl.state_, ec);

	// Clear out_flags, since we cannot give it any other sensible value when
	// performing a null_buffers operation.
	out_flags = 0;

	return 0;
	}

	// Start an asynchronous receive. The buffer for the data being received
	// must be valid for the lifetime of the asynchronous operation.
	template <typename MutableBufferSequence, typename Handler>
	void async_receive_with_flags(base_implementation_type& impl,
	const MutableBufferSequence& buffers, socket_base::message_flags in_flags,
	socket_base::message_flags& out_flags, Handler& handler)
	{
	bool is_continuation =
	asio_handler_cont_helpers::is_continuation(handler);

	// Allocate and construct an operation to wrap the handler.
	typedef reactive_socket_recvmsg_op<MutableBufferSequence, Handler> op;
	typename op::ptr p = { asio::detail::addressof(handler),
	op::ptr::allocate(handler), 0 };
	p.p = new (p.v) op(impl.socket_, buffers, in_flags, out_flags, handler);

	ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
	&impl, impl.socket_, "async_receive_with_flags"));

	start_op(impl,
	(in_flags & socket_base::message_out_of_band)
	? reactor::except_op : reactor::read_op,
	p.p, is_continuation,
	(in_flags & socket_base::message_out_of_band) == 0, false);
	p.v = p.p = 0;
	}

	// Wait until data can be received without blocking.
	template <typename Handler>
	void async_receive_with_flags(base_implementation_type& impl,
	const null_buffers&, socket_base::message_flags in_flags,
	socket_base::message_flags& out_flags, Handler& handler)
	{
	bool is_continuation =
	asio_handler_cont_helpers::is_continuation(handler);

	// Allocate and construct an operation to wrap the handler.
	typedef reactive_null_buffers_op<Handler> op;
	typename op::ptr p = { asio::detail::addressof(handler),
	op::ptr::allocate(handler), 0 };
	p.p = new (p.v) op(handler);

	ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket",
	&impl, impl.socket_, "async_receive_with_flags(null_buffers)"));

	// Clear out_flags, since we cannot give it any other sensible value when
	// performing a null_buffers operation.
	out_flags = 0;

	start_op(impl,
	(in_flags & socket_base::message_out_of_band)
	? reactor::except_op : reactor::read_op,
	p.p, is_continuation, false, false);
	p.v = p.p = 0;
	}

	protected:
	// Open a new socket implementation.
	ASIO_DECL asio::error_code do_open(
	base_implementation_type& impl, int af,
	int type, int protocol, asio::error_code& ec);

	// Assign a native socket to a socket implementation.
	ASIO_DECL asio::error_code do_assign(
	base_implementation_type& impl, int type,
	const native_handle_type& native_socket, asio::error_code& ec);

	// Start the asynchronous read or write operation.
	ASIO_DECL void start_op(base_implementation_type& impl, int op_type,
	reactor_op* op, bool is_continuation, bool is_non_blocking, bool noop);

	// Start the asynchronous accept operation.
	ASIO_DECL void start_accept_op(base_implementation_type& impl,
	reactor_op* op, bool is_continuation, bool peer_is_open);

	// Start the asynchronous connect operation.
	ASIO_DECL void start_connect_op(base_implementation_type& impl,
	reactor_op* op, bool is_continuation,
	const socket_addr_type* addr, size_t addrlen);

	// The io_context that owns this socket service.
	io_context& io_context_;

	// The selector that performs event demultiplexing for the service.
	reactor& reactor_;
	};

	} // namespace detail
	} // namespace asio

	#include "asio/detail/pop_options.hpp"

	#if defined(ASIO_HEADER_ONLY)
	# include "asio/detail/impl/reactive_socket_service_base.ipp"
	#endif // defined(ASIO_HEADER_ONLY)

	#endif // !defined(ASIO_HAS_IOCP)
	// && !defined(ASIO_WINDOWS_RUNTIME)

	#endif // ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_BASE_HPP