FM / asio

/usr/include/boost/asio

Name	Size	Mode	Actions
detail/	-	0755	rm
execution/	-	0755	rm
generic/	-	0755	rm
impl/	-	0755	rm
ip/	-	0755	rm
local/	-	0755	rm
posix/	-	0755	rm
ssl/	-	0755	rm
traits/	-	0755	rm
ts/	-	0755	rm
windows/	-	0755	rm
any_io_executor.hpp	2625	0644	edit dl rm
associated_allocator.hpp	3791	0644	edit dl rm
associated_executor.hpp	5057	0644	edit dl rm
async_result.hpp	19423	0644	edit dl rm
awaitable.hpp	3270	0644	edit dl rm
basic_datagram_socket.hpp	47521	0644	edit dl rm
basic_deadline_timer.hpp	24158	0644	edit dl rm
basic_io_object.hpp	8096	0644	edit dl rm
basic_raw_socket.hpp	46996	0644	edit dl rm
basic_seq_packet_socket.hpp	29184	0644	edit dl rm
basic_serial_port.hpp	31912	0644	edit dl rm
basic_signal_set.hpp	19876	0644	edit dl rm
basic_socket.hpp	65516	0644	edit dl rm
basic_socket_acceptor.hpp	88062	0644	edit dl rm
basic_socket_iostream.hpp	13298	0644	edit dl rm
basic_socket_streambuf.hpp	21713	0644	edit dl rm
basic_streambuf.hpp	13714	0644	edit dl rm
basic_streambuf_fwd.hpp	920	0644	edit dl rm
basic_stream_socket.hpp	41520	0644	edit dl rm
basic_waitable_timer.hpp	28528	0644	edit dl rm
bind_executor.hpp	16510	0644	edit dl rm
buffer.hpp	83254	0644	edit dl rm
buffered_read_stream.hpp	8424	0644	edit dl rm
buffered_read_stream_fwd.hpp	699	0644	edit dl rm
buffered_stream.hpp	9074	0644	edit dl rm
buffered_stream_fwd.hpp	669	0644	edit dl rm
buffered_write_stream.hpp	8042	0644	edit dl rm
buffered_write_stream_fwd.hpp	705	0644	edit dl rm
buffers_iterator.hpp	14049	0644	edit dl rm
completion_condition.hpp	5500	0644	edit dl rm
compose.hpp	4596	0644	edit dl rm
connect.hpp	43157	0644	edit dl rm
coroutine.hpp	9897	0644	edit dl rm
co_spawn.hpp	14509	0644	edit dl rm
deadline_timer.hpp	1138	0644	edit dl rm
defer.hpp	5070	0644	edit dl rm
detached.hpp	3517	0644	edit dl rm
dispatch.hpp	4537	0644	edit dl rm
error.hpp	10351	0644	edit dl rm
execution.hpp	1871	0644	edit dl rm
execution_context.hpp	14341	0644	edit dl rm
executor.hpp	10467	0644	edit dl rm
executor_work_guard.hpp	8039	0644	edit dl rm
handler_alloc_hook.hpp	3471	0644	edit dl rm
handler_continuation_hook.hpp	1474	0644	edit dl rm
handler_invoke_hook.hpp	3744	0644	edit dl rm
high_resolution_timer.hpp	1394	0644	edit dl rm
io_context.hpp	55226	0644	edit dl rm
io_context_strand.hpp	13706	0644	edit dl rm
io_service.hpp	861	0644	edit dl rm
io_service_strand.hpp	575	0644	edit dl rm
is_applicable_property.hpp	1605	0644	edit dl rm
is_executor.hpp	1306	0644	edit dl rm
is_read_buffered.hpp	1646	0644	edit dl rm
is_write_buffered.hpp	1667	0644	edit dl rm
multiple_exceptions.hpp	1631	0644	edit dl rm
packaged_task.hpp	3358	0644	edit dl rm
placeholders.hpp	4146	0644	edit dl rm
post.hpp	4760	0644	edit dl rm
prefer.hpp	18821	0644	edit dl rm
query.hpp	8323	0644	edit dl rm
read.hpp	53894	0644	edit dl rm
read_at.hpp	27766	0644	edit dl rm
read_until.hpp	119477	0644	edit dl rm
redirect_error.hpp	1938	0644	edit dl rm
require.hpp	14926	0644	edit dl rm
require_concept.hpp	9218	0644	edit dl rm
serial_port.hpp	1010	0644	edit dl rm
serial_port_base.hpp	4975	0644	edit dl rm
signal_set.hpp	748	0644	edit dl rm
socket_base.hpp	15939	0644	edit dl rm
spawn.hpp	11793	0644	edit dl rm
ssl.hpp	848	0644	edit dl rm
static_thread_pool.hpp	826	0644	edit dl rm
steady_timer.hpp	1306	0644	edit dl rm
strand.hpp	17193	0644	edit dl rm
streambuf.hpp	826	0644	edit dl rm
system_context.hpp	2649	0644	edit dl rm
system_executor.hpp	22529	0644	edit dl rm
system_timer.hpp	1306	0644	edit dl rm
this_coro.hpp	1149	0644	edit dl rm
thread_pool.hpp	37567	0644	edit dl rm
time_traits.hpp	2281	0644	edit dl rm
unyield.hpp	381	0644	edit dl rm
uses_executor.hpp	2348	0644	edit dl rm
use_awaitable.hpp	5821	0644	edit dl rm
use_future.hpp	4820	0644	edit dl rm
version.hpp	686	0644	edit dl rm
wait_traits.hpp	1451	0644	edit dl rm
write.hpp	52959	0644	edit dl rm
write_at.hpp	29514	0644	edit dl rm
yield.hpp	482	0644	edit dl rm

Edit: /usr/include/boost/asio/basic_datagram_socket.hpp (47521B)

//
// basic_datagram_socket.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2020 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 BOOST_ASIO_BASIC_DATAGRAM_SOCKET_HPP
#define BOOST_ASIO_BASIC_DATAGRAM_SOCKET_HPP

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

#include <boost/asio/detail/config.hpp>
#include <cstddef>
#include <boost/asio/basic_socket.hpp>
#include <boost/asio/detail/handler_type_requirements.hpp>
#include <boost/asio/detail/non_const_lvalue.hpp>
#include <boost/asio/detail/throw_error.hpp>
#include <boost/asio/detail/type_traits.hpp>
#include <boost/asio/error.hpp>

#include <boost/asio/detail/push_options.hpp>

namespace boost {
namespace asio {

#if !defined(BOOST_ASIO_BASIC_DATAGRAM_SOCKET_FWD_DECL)
#define BOOST_ASIO_BASIC_DATAGRAM_SOCKET_FWD_DECL

// Forward declaration with defaulted arguments.
template <typename Protocol, typename Executor = any_io_executor>
class basic_datagram_socket;

#endif // !defined(BOOST_ASIO_BASIC_DATAGRAM_SOCKET_FWD_DECL)

/// Provides datagram-oriented socket functionality.
/**
 * The basic_datagram_socket class template provides asynchronous and blocking
 * datagram-oriented socket functionality.
 *
 * @par Thread Safety
 * @e Distinct @e objects: Safe.@n
 * @e Shared @e objects: Unsafe.
 */
template <typename Protocol, typename Executor>
class basic_datagram_socket
  : public basic_socket<Protocol, Executor>
{
public:
  /// The type of the executor associated with the object.
  typedef Executor executor_type;

/// Rebinds the socket type to another executor.
  template <typename Executor1>
  struct rebind_executor
  {
    /// The socket type when rebound to the specified executor.
    typedef basic_datagram_socket<Protocol, Executor1> other;
  };

/// The native representation of a socket.
#if defined(GENERATING_DOCUMENTATION)
  typedef implementation_defined native_handle_type;
#else
  typedef typename basic_socket<Protocol,
    Executor>::native_handle_type native_handle_type;
#endif

/// The protocol type.
  typedef Protocol protocol_type;

/// The endpoint type.
  typedef typename Protocol::endpoint endpoint_type;

/// Construct a basic_datagram_socket without opening it.
  /**
   * This constructor creates a datagram socket without opening it. The open()
   * function must be called before data can be sent or received on the socket.
   *
   * @param ex The I/O executor that the socket will use, by default, to
   * dispatch handlers for any asynchronous operations performed on the socket.
   */
  explicit basic_datagram_socket(const executor_type& ex)
    : basic_socket<Protocol, Executor>(ex)
  {
  }

/// Construct a basic_datagram_socket without opening it.
  /**
   * This constructor creates a datagram socket without opening it. The open()
   * function must be called before data can be sent or received on the socket.
   *
   * @param context An execution context which provides the I/O executor that
   * the socket will use, by default, to dispatch handlers for any asynchronous
   * operations performed on the socket.
   */
  template <typename ExecutionContext>
  explicit basic_datagram_socket(ExecutionContext& context,
      typename enable_if<
        is_convertible<ExecutionContext&, execution_context&>::value
      >::type* = 0)
    : basic_socket<Protocol, Executor>(context)
  {
  }

/// Construct and open a basic_datagram_socket.
  /**
   * This constructor creates and opens a datagram socket.
   *
   * @param ex The I/O executor that the socket will use, by default, to
   * dispatch handlers for any asynchronous operations performed on the socket.
   *
   * @param protocol An object specifying protocol parameters to be used.
   *
   * @throws boost::system::system_error Thrown on failure.
   */
  basic_datagram_socket(const executor_type& ex, const protocol_type& protocol)
    : basic_socket<Protocol, Executor>(ex, protocol)
  {
  }

/// Construct and open a basic_datagram_socket.
  /**
   * This constructor creates and opens a datagram socket.
   *
   * @param context An execution context which provides the I/O executor that
   * the socket will use, by default, to dispatch handlers for any asynchronous
   * operations performed on the socket.
   *
   * @param protocol An object specifying protocol parameters to be used.
   *
   * @throws boost::system::system_error Thrown on failure.
   */
  template <typename ExecutionContext>
  basic_datagram_socket(ExecutionContext& context,
      const protocol_type& protocol,
      typename enable_if<
        is_convertible<ExecutionContext&, execution_context&>::value
      >::type* = 0)
    : basic_socket<Protocol, Executor>(context, protocol)
  {
  }

/// Construct a basic_datagram_socket, opening it and binding it to the given
  /// local endpoint.
  /**
   * This constructor creates a datagram socket and automatically opens it bound
   * to the specified endpoint on the local machine. The protocol used is the
   * protocol associated with the given endpoint.
   *
   * @param ex The I/O executor that the socket will use, by default, to
   * dispatch handlers for any asynchronous operations performed on the socket.
   *
   * @param endpoint An endpoint on the local machine to which the datagram
   * socket will be bound.
   *
   * @throws boost::system::system_error Thrown on failure.
   */
  basic_datagram_socket(const executor_type& ex, const endpoint_type& endpoint)
    : basic_socket<Protocol, Executor>(ex, endpoint)
  {
  }

/// Construct a basic_datagram_socket, opening it and binding it to the given
  /// local endpoint.
  /**
   * This constructor creates a datagram socket and automatically opens it bound
   * to the specified endpoint on the local machine. The protocol used is the
   * protocol associated with the given endpoint.
   *
   * @param context An execution context which provides the I/O executor that
   * the socket will use, by default, to dispatch handlers for any asynchronous
   * operations performed on the socket.
   *
   * @param endpoint An endpoint on the local machine to which the datagram
   * socket will be bound.
   *
   * @throws boost::system::system_error Thrown on failure.
   */
  template <typename ExecutionContext>
  basic_datagram_socket(ExecutionContext& context,
      const endpoint_type& endpoint,
      typename enable_if<
        is_convertible<ExecutionContext&, execution_context&>::value
      >::type* = 0)
    : basic_socket<Protocol, Executor>(context, endpoint)
  {
  }

/// Construct a basic_datagram_socket on an existing native socket.
  /**
   * This constructor creates a datagram socket object to hold an existing
   * native socket.
   *
   * @param ex The I/O executor that the socket will use, by default, to
   * dispatch handlers for any asynchronous operations performed on the socket.
   *
   * @param protocol An object specifying protocol parameters to be used.
   *
   * @param native_socket The new underlying socket implementation.
   *
   * @throws boost::system::system_error Thrown on failure.
   */
  basic_datagram_socket(const executor_type& ex,
      const protocol_type& protocol, const native_handle_type& native_socket)
    : basic_socket<Protocol, Executor>(ex, protocol, native_socket)
  {
  }

/// Construct a basic_datagram_socket on an existing native socket.
  /**
   * This constructor creates a datagram socket object to hold an existing
   * native socket.
   *
   * @param context An execution context which provides the I/O executor that
   * the socket will use, by default, to dispatch handlers for any asynchronous
   * operations performed on the socket.
   *
   * @param protocol An object specifying protocol parameters to be used.
   *
   * @param native_socket The new underlying socket implementation.
   *
   * @throws boost::system::system_error Thrown on failure.
   */
  template <typename ExecutionContext>
  basic_datagram_socket(ExecutionContext& context,
      const protocol_type& protocol, const native_handle_type& native_socket,
      typename enable_if<
        is_convertible<ExecutionContext&, execution_context&>::value
      >::type* = 0)
    : basic_socket<Protocol, Executor>(context, protocol, native_socket)
  {
  }

#if defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
  /// Move-construct a basic_datagram_socket from another.
  /**
   * This constructor moves a datagram socket from one object to another.
   *
   * @param other The other basic_datagram_socket object from which the move
   * will occur.
   *
   * @note Following the move, the moved-from object is in the same state as if
   * constructed using the @c basic_datagram_socket(const executor_type&)
   * constructor.
   */
  basic_datagram_socket(basic_datagram_socket&& other) BOOST_ASIO_NOEXCEPT
    : basic_socket<Protocol, Executor>(std::move(other))
  {
  }

/// Move-assign a basic_datagram_socket from another.
  /**
   * This assignment operator moves a datagram socket from one object to
   * another.
   *
   * @param other The other basic_datagram_socket object from which the move
   * will occur.
   *
   * @note Following the move, the moved-from object is in the same state as if
   * constructed using the @c basic_datagram_socket(const executor_type&)
   * constructor.
   */
  basic_datagram_socket& operator=(basic_datagram_socket&& other)
  {
    basic_socket<Protocol, Executor>::operator=(std::move(other));
    return *this;
  }

/// Move-construct a basic_datagram_socket from a socket of another protocol
  /// type.
  /**
   * This constructor moves a datagram socket from one object to another.
   *
   * @param other The other basic_datagram_socket object from which the move
   * will occur.
   *
   * @note Following the move, the moved-from object is in the same state as if
   * constructed using the @c basic_datagram_socket(const executor_type&)
   * constructor.
   */
  template <typename Protocol1, typename Executor1>
  basic_datagram_socket(basic_datagram_socket<Protocol1, Executor1>&& other,
      typename enable_if<
        is_convertible<Protocol1, Protocol>::value
          && is_convertible<Executor1, Executor>::value
      >::type* = 0)
    : basic_socket<Protocol, Executor>(std::move(other))
  {
  }

/// Move-assign a basic_datagram_socket from a socket of another protocol
  /// type.
  /**
   * This assignment operator moves a datagram socket from one object to
   * another.
   *
   * @param other The other basic_datagram_socket object from which the move
   * will occur.
   *
   * @note Following the move, the moved-from object is in the same state as if
   * constructed using the @c basic_datagram_socket(const executor_type&)
   * constructor.
   */
  template <typename Protocol1, typename Executor1>
  typename enable_if<
    is_convertible<Protocol1, Protocol>::value
      && is_convertible<Executor1, Executor>::value,
    basic_datagram_socket&
  >::type operator=(basic_datagram_socket<Protocol1, Executor1>&& other)
  {
    basic_socket<Protocol, Executor>::operator=(std::move(other));
    return *this;
  }
#endif // defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)

/// Destroys the socket.
  /**
   * This function destroys the socket, cancelling any outstanding asynchronous
   * operations associated with the socket as if by calling @c cancel.
   */
  ~basic_datagram_socket()
  {
  }

/// Send some data on a connected socket.
  /**
   * This function is used to send data on the datagram socket. The function
   * call will block until the data has been sent successfully or an error
   * occurs.
   *
   * @param buffers One ore more data buffers to be sent on the socket.
   *
   * @returns The number of bytes sent.
   *
   * @throws boost::system::system_error Thrown on failure.
   *
   * @note The send operation can only be used with a connected socket. Use
   * the send_to function to send data on an unconnected datagram socket.
   *
   * @par Example
   * To send a single data buffer use the @ref buffer function as follows:
   * @code socket.send(boost::asio::buffer(data, size)); @endcode
   * See the @ref buffer documentation for information on sending multiple
   * buffers in one go, and how to use it with arrays, boost::array or
   * std::vector.
   */
  template <typename ConstBufferSequence>
  std::size_t send(const ConstBufferSequence& buffers)
  {
    boost::system::error_code ec;
    std::size_t s = this->impl_.get_service().send(
        this->impl_.get_implementation(), buffers, 0, ec);
    boost::asio::detail::throw_error(ec, "send");
    return s;
  }

/// Send some data on a connected socket.
  /**
   * This function is used to send data on the datagram socket. The function
   * call will block until the data has been sent successfully or an error
   * occurs.
   *
   * @param buffers One ore more data buffers to be sent on the socket.
   *
   * @param flags Flags specifying how the send call is to be made.
   *
   * @returns The number of bytes sent.
   *
   * @throws boost::system::system_error Thrown on failure.
   *
   * @note The send operation can only be used with a connected socket. Use
   * the send_to function to send data on an unconnected datagram socket.
   */
  template <typename ConstBufferSequence>
  std::size_t send(const ConstBufferSequence& buffers,
      socket_base::message_flags flags)
  {
    boost::system::error_code ec;
    std::size_t s = this->impl_.get_service().send(
        this->impl_.get_implementation(), buffers, flags, ec);
    boost::asio::detail::throw_error(ec, "send");
    return s;
  }

/// Send some data on a connected socket.
  /**
   * This function is used to send data on the datagram socket. The function
   * call will block until the data has been sent successfully or an error
   * occurs.
   *
   * @param buffers One or more data buffers to be sent on the socket.
   *
   * @param flags Flags specifying how the send call is to be made.
   *
   * @param ec Set to indicate what error occurred, if any.
   *
   * @returns The number of bytes sent.
   *
   * @note The send operation can only be used with a connected socket. Use
   * the send_to function to send data on an unconnected datagram socket.
   */
  template <typename ConstBufferSequence>
  std::size_t send(const ConstBufferSequence& buffers,
      socket_base::message_flags flags, boost::system::error_code& ec)
  {
    return this->impl_.get_service().send(
        this->impl_.get_implementation(), buffers, flags, ec);
  }

/// Start an asynchronous send on a connected socket.
  /**
   * This function is used to asynchronously send data on the datagram socket.
   * The function call always returns immediately.
   *
   * @param buffers One or more data buffers to be sent on the socket. Although
   * the buffers object may be copied as necessary, ownership of the underlying
   * memory blocks is retained by the caller, which must guarantee that they
   * remain valid until the handler is called.
   *
   * @param handler The handler to be called when the send operation completes.
   * Copies will be made of the handler as required. The function signature of
   * the handler must be:
   * @code void handler(
   *   const boost::system::error_code& error, // Result of operation.
   *   std::size_t bytes_transferred           // Number of bytes sent.
   * ); @endcode
   * Regardless of whether the asynchronous operation completes immediately or
   * not, the handler will not be invoked from within this function. On
   * immediate completion, invocation of the handler will be performed in a
   * manner equivalent to using boost::asio::post().
   *
   * @note The async_send operation can only be used with a connected socket.
   * Use the async_send_to function to send data on an unconnected datagram
   * socket.
   *
   * @par Example
   * To send a single data buffer use the @ref buffer function as follows:
   * @code
   * socket.async_send(boost::asio::buffer(data, size), handler);
   * @endcode
   * See the @ref buffer documentation for information on sending multiple
   * buffers in one go, and how to use it with arrays, boost::array or
   * std::vector.
   */
  template <typename ConstBufferSequence,
      BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code,
        std::size_t)) WriteHandler
          BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)>
  BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(WriteHandler,
      void (boost::system::error_code, std::size_t))
  async_send(const ConstBufferSequence& buffers,
      BOOST_ASIO_MOVE_ARG(WriteHandler) handler
        BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(executor_type))
  {
    return async_initiate<WriteHandler,
      void (boost::system::error_code, std::size_t)>(
        initiate_async_send(this), handler,
        buffers, socket_base::message_flags(0));
  }

/// Start an asynchronous send on a connected socket.
  /**
   * This function is used to asynchronously send data on the datagram socket.
   * The function call always returns immediately.
   *
   * @param buffers One or more data buffers to be sent on the socket. Although
   * the buffers object may be copied as necessary, ownership of the underlying
   * memory blocks is retained by the caller, which must guarantee that they
   * remain valid until the handler is called.
   *
   * @param flags Flags specifying how the send call is to be made.
   *
   * @param handler The handler to be called when the send operation completes.
   * Copies will be made of the handler as required. The function signature of
   * the handler must be:
   * @code void handler(
   *   const boost::system::error_code& error, // Result of operation.
   *   std::size_t bytes_transferred           // Number of bytes sent.
   * ); @endcode
   * Regardless of whether the asynchronous operation completes immediately or
   * not, the handler will not be invoked from within this function. On
   * immediate completion, invocation of the handler will be performed in a
   * manner equivalent to using boost::asio::post().
   *
   * @note The async_send operation can only be used with a connected socket.
   * Use the async_send_to function to send data on an unconnected datagram
   * socket.
   */
  template <typename ConstBufferSequence,
      BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code,
        std::size_t)) WriteHandler
          BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)>
  BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(WriteHandler,
      void (boost::system::error_code, std::size_t))
  async_send(const ConstBufferSequence& buffers,
      socket_base::message_flags flags,
      BOOST_ASIO_MOVE_ARG(WriteHandler) handler
        BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(executor_type))
  {
    return async_initiate<WriteHandler,
      void (boost::system::error_code, std::size_t)>(
        initiate_async_send(this), handler, buffers, flags);
  }

/// Send a datagram to the specified endpoint.
  /**
   * This function is used to send a datagram to the specified remote endpoint.
   * The function call will block until the data has been sent successfully or
   * an error occurs.
   *
   * @param buffers One or more data buffers to be sent to the remote endpoint.
   *
   * @param destination The remote endpoint to which the data will be sent.
   *
   * @returns The number of bytes sent.
   *
   * @throws boost::system::system_error Thrown on failure.
   *
   * @par Example
   * To send a single data buffer use the @ref buffer function as follows:
   * @code
   * boost::asio::ip::udp::endpoint destination(
   *     boost::asio::ip::address::from_string("1.2.3.4"), 12345);
   * socket.send_to(boost::asio::buffer(data, size), destination);
   * @endcode
   * See the @ref buffer documentation for information on sending multiple
   * buffers in one go, and how to use it with arrays, boost::array or
   * std::vector.
   */
  template <typename ConstBufferSequence>
  std::size_t send_to(const ConstBufferSequence& buffers,
      const endpoint_type& destination)
  {
    boost::system::error_code ec;
    std::size_t s = this->impl_.get_service().send_to(
        this->impl_.get_implementation(), buffers, destination, 0, ec);
    boost::asio::detail::throw_error(ec, "send_to");
    return s;
  }

/// Send a datagram to the specified endpoint.
  /**
   * This function is used to send a datagram to the specified remote endpoint.
   * The function call will block until the data has been sent successfully or
   * an error occurs.
   *
   * @param buffers One or more data buffers to be sent to the remote endpoint.
   *
   * @param destination The remote endpoint to which the data will be sent.
   *
   * @param flags Flags specifying how the send call is to be made.
   *
   * @returns The number of bytes sent.
   *
   * @throws boost::system::system_error Thrown on failure.
   */
  template <typename ConstBufferSequence>
  std::size_t send_to(const ConstBufferSequence& buffers,
      const endpoint_type& destination, socket_base::message_flags flags)
  {
    boost::system::error_code ec;
    std::size_t s = this->impl_.get_service().send_to(
        this->impl_.get_implementation(), buffers, destination, flags, ec);
    boost::asio::detail::throw_error(ec, "send_to");
    return s;
  }

/// Start an asynchronous send.
  /**
   * This function is used to asynchronously send a datagram to the specified
   * remote endpoint. The function call always returns immediately.
   *
   * @param buffers One or more data buffers to be sent to the remote endpoint.
   * Although the buffers object may be copied as necessary, ownership of the
   * underlying memory blocks is retained by the caller, which must guarantee
   * that they remain valid until the handler is called.
   *
   * @param destination The remote endpoint to which the data will be sent.
   * Copies will be made of the endpoint as required.
   *
   * @param handler The handler to be called when the send operation completes.
   * Copies will be made of the handler as required. The function signature of
   * the handler must be:
   * @code void handler(
   *   const boost::system::error_code& error, // Result of operation.
   *   std::size_t bytes_transferred           // Number of bytes sent.
   * ); @endcode
   * Regardless of whether the asynchronous operation completes immediately or
   * not, the handler will not be invoked from within this function. On
   * immediate completion, invocation of the handler will be performed in a
   * manner equivalent to using boost::asio::post().
   *
   * @par Example
   * To send a single data buffer use the @ref buffer function as follows:
   * @code
   * boost::asio::ip::udp::endpoint destination(
   *     boost::asio::ip::address::from_string("1.2.3.4"), 12345);
   * socket.async_send_to(
   *     boost::asio::buffer(data, size), destination, handler);
   * @endcode
   * See the @ref buffer documentation for information on sending multiple
   * buffers in one go, and how to use it with arrays, boost::array or
   * std::vector.
   */
  template <typename ConstBufferSequence,
      BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code,
        std::size_t)) WriteHandler
          BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)>
  BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(WriteHandler,
      void (boost::system::error_code, std::size_t))
  async_send_to(const ConstBufferSequence& buffers,
      const endpoint_type& destination,
      BOOST_ASIO_MOVE_ARG(WriteHandler) handler
        BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(executor_type))
  {
    return async_initiate<WriteHandler,
      void (boost::system::error_code, std::size_t)>(
        initiate_async_send_to(this), handler, buffers,
        destination, socket_base::message_flags(0));
  }

/// Start an asynchronous send.
  /**
   * This function is used to asynchronously send a datagram to the specified
   * remote endpoint. The function call always returns immediately.
   *
   * @param buffers One or more data buffers to be sent to the remote endpoint.
   * Although the buffers object may be copied as necessary, ownership of the
   * underlying memory blocks is retained by the caller, which must guarantee
   * that they remain valid until the handler is called.
   *
   * @param flags Flags specifying how the send call is to be made.
   *
   * @param destination The remote endpoint to which the data will be sent.
   * Copies will be made of the endpoint as required.
   *
   * @param handler The handler to be called when the send operation completes.
   * Copies will be made of the handler as required. The function signature of
   * the handler must be:
   * @code void handler(
   *   const boost::system::error_code& error, // Result of operation.
   *   std::size_t bytes_transferred           // Number of bytes sent.
   * ); @endcode
   * Regardless of whether the asynchronous operation completes immediately or
   * not, the handler will not be invoked from within this function. On
   * immediate completion, invocation of the handler will be performed in a
   * manner equivalent to using boost::asio::post().
   */
  template <typename ConstBufferSequence,
      BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code,
        std::size_t)) WriteHandler
          BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)>
  BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(WriteHandler,
      void (boost::system::error_code, std::size_t))
  async_send_to(const ConstBufferSequence& buffers,
      const endpoint_type& destination, socket_base::message_flags flags,
      BOOST_ASIO_MOVE_ARG(WriteHandler) handler
        BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(executor_type))
  {
    return async_initiate<WriteHandler,
      void (boost::system::error_code, std::size_t)>(
        initiate_async_send_to(this), handler, buffers, destination, flags);
  }

/// Receive some data on a connected socket.
  /**
   * This function is used to receive data on the datagram socket. The function
   * call will block until data has been received successfully or an error
   * occurs.
   *
   * @param buffers One or more buffers into which the data will be received.
   *
   * @returns The number of bytes received.
   *
   * @throws boost::system::system_error Thrown on failure.
   *
   * @note The receive operation can only be used with a connected socket. Use
   * the receive_from function to receive data on an unconnected datagram
   * socket.
   *
   * @par Example
   * To receive into a single data buffer use the @ref buffer function as
   * follows:
   * @code socket.receive(boost::asio::buffer(data, size)); @endcode
   * See the @ref buffer documentation for information on receiving into
   * multiple buffers in one go, and how to use it with arrays, boost::array or
   * std::vector.
   */
  template <typename MutableBufferSequence>
  std::size_t receive(const MutableBufferSequence& buffers)
  {
    boost::system::error_code ec;
    std::size_t s = this->impl_.get_service().receive(
        this->impl_.get_implementation(), buffers, 0, ec);
    boost::asio::detail::throw_error(ec, "receive");
    return s;
  }

/// Receive some data on a connected socket.
  /**
   * This function is used to receive data on the datagram socket. The function
   * call will block until data has been received successfully or an error
   * occurs.
   *
   * @param buffers One or more buffers into which the data will be received.
   *
   * @param flags Flags specifying how the receive call is to be made.
   *
   * @returns The number of bytes received.
   *
   * @throws boost::system::system_error Thrown on failure.
   *
   * @note The receive operation can only be used with a connected socket. Use
   * the receive_from function to receive data on an unconnected datagram
   * socket.
   */
  template <typename MutableBufferSequence>
  std::size_t receive(const MutableBufferSequence& buffers,
      socket_base::message_flags flags)
  {
    boost::system::error_code ec;
    std::size_t s = this->impl_.get_service().receive(
        this->impl_.get_implementation(), buffers, flags, ec);
    boost::asio::detail::throw_error(ec, "receive");
    return s;
  }

/// Receive some data on a connected socket.
  /**
   * This function is used to receive data on the datagram socket. The function
   * call will block until data has been received successfully or an error
   * occurs.
   *
   * @param buffers One or more buffers into which the data will be received.
   *
   * @param flags Flags specifying how the receive call is to be made.
   *
   * @param ec Set to indicate what error occurred, if any.
   *
   * @returns The number of bytes received.
   *
   * @note The receive operation can only be used with a connected socket. Use
   * the receive_from function to receive data on an unconnected datagram
   * socket.
   */
  template <typename MutableBufferSequence>
  std::size_t receive(const MutableBufferSequence& buffers,
      socket_base::message_flags flags, boost::system::error_code& ec)
  {
    return this->impl_.get_service().receive(
        this->impl_.get_implementation(), buffers, flags, ec);
  }

/// Start an asynchronous receive on a connected socket.
  /**
   * This function is used to asynchronously receive data from the datagram
   * socket. The function call always returns immediately.
   *
   * @param buffers One or more buffers into which the data will be received.
   * Although the buffers object may be copied as necessary, ownership of the
   * underlying memory blocks is retained by the caller, which must guarantee
   * that they remain valid until the handler is called.
   *
   * @param handler The handler to be called when the receive operation
   * completes. Copies will be made of the handler as required. The function
   * signature of the handler must be:
   * @code void handler(
   *   const boost::system::error_code& error, // Result of operation.
   *   std::size_t bytes_transferred           // Number of bytes received.
   * ); @endcode
   * Regardless of whether the asynchronous operation completes immediately or
   * not, the handler will not be invoked from within this function. On
   * immediate completion, invocation of the handler will be performed in a
   * manner equivalent to using boost::asio::post().
   *
   * @note The async_receive operation can only be used with a connected socket.
   * Use the async_receive_from function to receive data on an unconnected
   * datagram socket.
   *
   * @par Example
   * To receive into a single data buffer use the @ref buffer function as
   * follows:
   * @code
   * socket.async_receive(boost::asio::buffer(data, size), handler);
   * @endcode
   * See the @ref buffer documentation for information on receiving into
   * multiple buffers in one go, and how to use it with arrays, boost::array or
   * std::vector.
   */
  template <typename MutableBufferSequence,
      BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code,
        std::size_t)) ReadHandler
          BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)>
  BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(ReadHandler,
      void (boost::system::error_code, std::size_t))
  async_receive(const MutableBufferSequence& buffers,
      BOOST_ASIO_MOVE_ARG(ReadHandler) handler
        BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(executor_type))
  {
    return async_initiate<ReadHandler,
      void (boost::system::error_code, std::size_t)>(
        initiate_async_receive(this), handler,
        buffers, socket_base::message_flags(0));
  }

/// Start an asynchronous receive on a connected socket.
  /**
   * This function is used to asynchronously receive data from the datagram
   * socket. The function call always returns immediately.
   *
   * @param buffers One or more buffers into which the data will be received.
   * Although the buffers object may be copied as necessary, ownership of the
   * underlying memory blocks is retained by the caller, which must guarantee
   * that they remain valid until the handler is called.
   *
   * @param flags Flags specifying how the receive call is to be made.
   *
   * @param handler The handler to be called when the receive operation
   * completes. Copies will be made of the handler as required. The function
   * signature of the handler must be:
   * @code void handler(
   *   const boost::system::error_code& error, // Result of operation.
   *   std::size_t bytes_transferred           // Number of bytes received.
   * ); @endcode
   * Regardless of whether the asynchronous operation completes immediately or
   * not, the handler will not be invoked from within this function. On
   * immediate completion, invocation of the handler will be performed in a
   * manner equivalent to using boost::asio::post().
   *
   * @note The async_receive operation can only be used with a connected socket.
   * Use the async_receive_from function to receive data on an unconnected
   * datagram socket.
   */
  template <typename MutableBufferSequence,
      BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code,
        std::size_t)) ReadHandler
          BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)>
  BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(ReadHandler,
      void (boost::system::error_code, std::size_t))
  async_receive(const MutableBufferSequence& buffers,
      socket_base::message_flags flags,
      BOOST_ASIO_MOVE_ARG(ReadHandler) handler
        BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(executor_type))
  {
    return async_initiate<ReadHandler,
      void (boost::system::error_code, std::size_t)>(
        initiate_async_receive(this), handler, buffers, flags);
  }

/// Receive a datagram with the endpoint of the sender.
  /**
   * This function is used to receive a datagram. The function call will block
   * until data has been received successfully or an error occurs.
   *
   * @param buffers One or more buffers into which the data will be received.
   *
   * @param sender_endpoint An endpoint object that receives the endpoint of
   * the remote sender of the datagram.
   *
   * @returns The number of bytes received.
   *
   * @throws boost::system::system_error Thrown on failure.
   *
   * @par Example
   * To receive into a single data buffer use the @ref buffer function as
   * follows:
   * @code
   * boost::asio::ip::udp::endpoint sender_endpoint;
   * socket.receive_from(
   *     boost::asio::buffer(data, size), sender_endpoint);
   * @endcode
   * See the @ref buffer documentation for information on receiving into
   * multiple buffers in one go, and how to use it with arrays, boost::array or
   * std::vector.
   */
  template <typename MutableBufferSequence>
  std::size_t receive_from(const MutableBufferSequence& buffers,
      endpoint_type& sender_endpoint)
  {
    boost::system::error_code ec;
    std::size_t s = this->impl_.get_service().receive_from(
        this->impl_.get_implementation(), buffers, sender_endpoint, 0, ec);
    boost::asio::detail::throw_error(ec, "receive_from");
    return s;
  }
  
  /// Receive a datagram with the endpoint of the sender.
  /**
   * This function is used to receive a datagram. The function call will block
   * until data has been received successfully or an error occurs.
   *
   * @param buffers One or more buffers into which the data will be received.
   *
   * @param sender_endpoint An endpoint object that receives the endpoint of
   * the remote sender of the datagram.
   *
   * @param flags Flags specifying how the receive call is to be made.
   *
   * @returns The number of bytes received.
   *
   * @throws boost::system::system_error Thrown on failure.
   */
  template <typename MutableBufferSequence>
  std::size_t receive_from(const MutableBufferSequence& buffers,
      endpoint_type& sender_endpoint, socket_base::message_flags flags)
  {
    boost::system::error_code ec;
    std::size_t s = this->impl_.get_service().receive_from(
        this->impl_.get_implementation(), buffers, sender_endpoint, flags, ec);
    boost::asio::detail::throw_error(ec, "receive_from");
    return s;
  }
  
  /// Receive a datagram with the endpoint of the sender.
  /**
   * This function is used to receive a datagram. The function call will block
   * until data has been received successfully or an error occurs.
   *
   * @param buffers One or more buffers into which the data will be received.
   *
   * @param sender_endpoint An endpoint object that receives the endpoint of
   * the remote sender of the datagram.
   *
   * @param flags Flags specifying how the receive call is to be made.
   *
   * @param ec Set to indicate what error occurred, if any.
   *
   * @returns The number of bytes received.
   */
  template <typename MutableBufferSequence>
  std::size_t receive_from(const MutableBufferSequence& buffers,
      endpoint_type& sender_endpoint, socket_base::message_flags flags,
      boost::system::error_code& ec)
  {
    return this->impl_.get_service().receive_from(
        this->impl_.get_implementation(), buffers, sender_endpoint, flags, ec);
  }

/// Start an asynchronous receive.
  /**
   * This function is used to asynchronously receive a datagram. The function
   * call always returns immediately.
   *
   * @param buffers One or more buffers into which the data will be received.
   * Although the buffers object may be copied as necessary, ownership of the
   * underlying memory blocks is retained by the caller, which must guarantee
   * that they remain valid until the handler is called.
   *
   * @param sender_endpoint An endpoint object that receives the endpoint of
   * the remote sender of the datagram. Ownership of the sender_endpoint object
   * is retained by the caller, which must guarantee that it is valid until the
   * handler is called.
   *
   * @param handler The handler to be called when the receive operation
   * completes. Copies will be made of the handler as required. The function
   * signature of the handler must be:
   * @code void handler(
   *   const boost::system::error_code& error, // Result of operation.
   *   std::size_t bytes_transferred           // Number of bytes received.
   * ); @endcode
   * Regardless of whether the asynchronous operation completes immediately or
   * not, the handler will not be invoked from within this function. On
   * immediate completion, invocation of the handler will be performed in a
   * manner equivalent to using boost::asio::post().
   *
   * @par Example
   * To receive into a single data buffer use the @ref buffer function as
   * follows:
   * @code socket.async_receive_from(
   *     boost::asio::buffer(data, size), sender_endpoint, handler); @endcode
   * See the @ref buffer documentation for information on receiving into
   * multiple buffers in one go, and how to use it with arrays, boost::array or
   * std::vector.
   */
  template <typename MutableBufferSequence,
      BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code,
        std::size_t)) ReadHandler
          BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)>
  BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(ReadHandler,
      void (boost::system::error_code, std::size_t))
  async_receive_from(const MutableBufferSequence& buffers,
      endpoint_type& sender_endpoint,
      BOOST_ASIO_MOVE_ARG(ReadHandler) handler
        BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(executor_type))
  {
    return async_initiate<ReadHandler,
      void (boost::system::error_code, std::size_t)>(
        initiate_async_receive_from(this), handler, buffers,
        &sender_endpoint, socket_base::message_flags(0));
  }

/// Start an asynchronous receive.
  /**
   * This function is used to asynchronously receive a datagram. The function
   * call always returns immediately.
   *
   * @param buffers One or more buffers into which the data will be received.
   * Although the buffers object may be copied as necessary, ownership of the
   * underlying memory blocks is retained by the caller, which must guarantee
   * that they remain valid until the handler is called.
   *
   * @param sender_endpoint An endpoint object that receives the endpoint of
   * the remote sender of the datagram. Ownership of the sender_endpoint object
   * is retained by the caller, which must guarantee that it is valid until the
   * handler is called.
   *
   * @param flags Flags specifying how the receive call is to be made.
   *
   * @param handler The handler to be called when the receive operation
   * completes. Copies will be made of the handler as required. The function
   * signature of the handler must be:
   * @code void handler(
   *   const boost::system::error_code& error, // Result of operation.
   *   std::size_t bytes_transferred           // Number of bytes received.
   * ); @endcode
   * Regardless of whether the asynchronous operation completes immediately or
   * not, the handler will not be invoked from within this function. On
   * immediate completion, invocation of the handler will be performed in a
   * manner equivalent to using boost::asio::post().
   */
  template <typename MutableBufferSequence,
      BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code,
        std::size_t)) ReadHandler
          BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)>
  BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(ReadHandler,
      void (boost::system::error_code, std::size_t))
  async_receive_from(const MutableBufferSequence& buffers,
      endpoint_type& sender_endpoint, socket_base::message_flags flags,
      BOOST_ASIO_MOVE_ARG(ReadHandler) handler
        BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(executor_type))
  {
    return async_initiate<ReadHandler,
      void (boost::system::error_code, std::size_t)>(
        initiate_async_receive_from(this), handler,
        buffers, &sender_endpoint, flags);
  }

private:
  // Disallow copying and assignment.
  basic_datagram_socket(const basic_datagram_socket&) BOOST_ASIO_DELETED;
  basic_datagram_socket& operator=(
      const basic_datagram_socket&) BOOST_ASIO_DELETED;

class initiate_async_send
  { 
  public:
    typedef Executor executor_type;

explicit initiate_async_send(basic_datagram_socket* self)
      : self_(self)
    {
    }

executor_type get_executor() const BOOST_ASIO_NOEXCEPT
    {
      return self_->get_executor();
    }

template <typename WriteHandler, typename ConstBufferSequence>
    void operator()(BOOST_ASIO_MOVE_ARG(WriteHandler) handler,
        const ConstBufferSequence& buffers,
        socket_base::message_flags flags) const
    {
      // If you get an error on the following line it means that your handler
      // does not meet the documented type requirements for a WriteHandler.
      BOOST_ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check;

detail::non_const_lvalue<WriteHandler> handler2(handler);
      self_->impl_.get_service().async_send(
          self_->impl_.get_implementation(), buffers, flags,
          handler2.value, self_->impl_.get_executor());
    }

private:
    basic_datagram_socket* self_;
  };

class initiate_async_send_to
  {
  public:
    typedef Executor executor_type;

explicit initiate_async_send_to(basic_datagram_socket* self)
      : self_(self)
    {
    }

executor_type get_executor() const BOOST_ASIO_NOEXCEPT
    {
      return self_->get_executor();
    }

template <typename WriteHandler, typename ConstBufferSequence>
    void operator()(BOOST_ASIO_MOVE_ARG(WriteHandler) handler,
        const ConstBufferSequence& buffers, const endpoint_type& destination,
        socket_base::message_flags flags) const
    {
      // If you get an error on the following line it means that your handler
      // does not meet the documented type requirements for a WriteHandler.
      BOOST_ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check;

detail::non_const_lvalue<WriteHandler> handler2(handler);
      self_->impl_.get_service().async_send_to(
          self_->impl_.get_implementation(), buffers, destination,
          flags, handler2.value, self_->impl_.get_executor());
    }

private:
    basic_datagram_socket* self_;
  };

class initiate_async_receive
  {
  public:
    typedef Executor executor_type;

explicit initiate_async_receive(basic_datagram_socket* self)
      : self_(self)
    {
    }

executor_type get_executor() const BOOST_ASIO_NOEXCEPT
    {
      return self_->get_executor();
    }

template <typename ReadHandler, typename MutableBufferSequence>
    void operator()(BOOST_ASIO_MOVE_ARG(ReadHandler) handler,
        const MutableBufferSequence& buffers,
        socket_base::message_flags flags) const
    {
      // If you get an error on the following line it means that your handler
      // does not meet the documented type requirements for a ReadHandler.
      BOOST_ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;

detail::non_const_lvalue<ReadHandler> handler2(handler);
      self_->impl_.get_service().async_receive(
          self_->impl_.get_implementation(), buffers, flags,
          handler2.value, self_->impl_.get_executor());
    }

private:
    basic_datagram_socket* self_;
  };

class initiate_async_receive_from
  {
  public:
    typedef Executor executor_type;

explicit initiate_async_receive_from(basic_datagram_socket* self)
      : self_(self)
    {
    }

executor_type get_executor() const BOOST_ASIO_NOEXCEPT
    {
      return self_->get_executor();
    }

template <typename ReadHandler, typename MutableBufferSequence>
    void operator()(BOOST_ASIO_MOVE_ARG(ReadHandler) handler,
        const MutableBufferSequence& buffers, endpoint_type* sender_endpoint,
        socket_base::message_flags flags) const
    {
      // If you get an error on the following line it means that your handler
      // does not meet the documented type requirements for a ReadHandler.
      BOOST_ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;

detail::non_const_lvalue<ReadHandler> handler2(handler);
      self_->impl_.get_service().async_receive_from(
          self_->impl_.get_implementation(), buffers, *sender_endpoint,
          flags, handler2.value, self_->impl_.get_executor());
    }

private:
    basic_datagram_socket* self_;
  };
};

} // namespace asio
} // namespace boost

#include <boost/asio/detail/pop_options.hpp>

#endif // BOOST_ASIO_BASIC_DATAGRAM_SOCKET_HPP

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