basic_datagram_socket.hpp

LINUX下

   * @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, asio::error_code& ec)
  {
    return this->service.receive(this->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 asio::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. Invocation
   * of the handler will be performed in a manner equivalent to using
   * asio::io_service::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(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, typename ReadHandler>
  void async_receive(const MutableBufferSequence& buffers, ReadHandler handler)
  {
    this->service.async_receive(this->implementation, buffers, 0, handler);
  }

  /// 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 asio::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. Invocation
   * of the handler will be performed in a manner equivalent to using
   * asio::io_service::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, typename ReadHandler>
  void async_receive(const MutableBufferSequence& buffers,
      socket_base::message_flags flags, ReadHandler handler)
  {
    this->service.async_receive(this->implementation, buffers, flags, handler);
  }

  /// 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 asio::system_error Thrown on failure.
   *
   * @par Example
   * To receive into a single data buffer use the @ref buffer function as
   * follows:
   * @code
   * asio::ip::udp::endpoint sender_endpoint;
   * socket.receive_from(
   *     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)
  {
    asio::error_code ec;
    std::size_t s = this->service.receive_from(
        this->implementation, buffers, sender_endpoint, 0, ec);
    asio::detail::throw_error(ec);
    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 asio::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)
  {
    asio::error_code ec;
    std::size_t s = this->service.receive_from(
        this->implementation, buffers, sender_endpoint, flags, ec);
    asio::detail::throw_error(ec);
    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,
      asio::error_code& ec)
  {
    return this->service.receive_from(this->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 asio::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. Invocation
   * of the handler will be performed in a manner equivalent to using
   * asio::io_service::post().
   *
   * @par Example
   * To receive into a single data buffer use the @ref buffer function as
   * follows:
   * @code socket.async_receive_from(
   *     asio::buffer(data, size), 0, 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, typename ReadHandler>
  void async_receive_from(const MutableBufferSequence& buffers,
      endpoint_type& sender_endpoint, ReadHandler handler)
  {
    this->service.async_receive_from(this->implementation, buffers,
        sender_endpoint, 0, handler);
  }

  /// 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 asio::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. Invocation
   * of the handler will be performed in a manner equivalent to using
   * asio::io_service::post().
   */
  template <typename MutableBufferSequence, typename ReadHandler>
  void async_receive_from(const MutableBufferSequence& buffers,
      endpoint_type& sender_endpoint, socket_base::message_flags flags,
      ReadHandler handler)
  {
    this->service.async_receive_from(this->implementation, buffers,
        sender_endpoint, flags, handler);
  }
};

} // namespace asio

#include "asio/detail/pop_options.hpp"

#endif // ASIO_BASIC_DATAGRAM_SOCKET_HPP