| // |
| // basic_seq_packet_socket.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2021 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_BASIC_SEQ_PACKET_SOCKET_HPP |
| #define ASIO_BASIC_SEQ_PACKET_SOCKET_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| #include <cstddef> |
| #include "asio/basic_socket.hpp" |
| #include "asio/detail/handler_type_requirements.hpp" |
| #include "asio/detail/throw_error.hpp" |
| #include "asio/error.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| |
| #if !defined(ASIO_BASIC_SEQ_PACKET_SOCKET_FWD_DECL) |
| #define ASIO_BASIC_SEQ_PACKET_SOCKET_FWD_DECL |
| |
| // Forward declaration with defaulted arguments. |
| template <typename Protocol, typename Executor = any_io_executor> |
| class basic_seq_packet_socket; |
| |
| #endif // !defined(ASIO_BASIC_SEQ_PACKET_SOCKET_FWD_DECL) |
| |
| /// Provides sequenced packet socket functionality. |
| /** |
| * The basic_seq_packet_socket class template provides asynchronous and blocking |
| * sequenced packet socket functionality. |
| * |
| * @par Thread Safety |
| * @e Distinct @e objects: Safe.@n |
| * @e Shared @e objects: Unsafe. |
| * |
| * Synchronous @c send, @c receive, and @c connect operations are thread safe |
| * with respect to each other, if the underlying operating system calls are |
| * also thread safe. This means that it is permitted to perform concurrent |
| * calls to these synchronous operations on a single socket object. Other |
| * synchronous operations, such as @c open or @c close, are not thread safe. |
| */ |
| template <typename Protocol, typename Executor> |
| class basic_seq_packet_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_seq_packet_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_seq_packet_socket without opening it. |
| /** |
| * This constructor creates a sequenced packet socket without opening it. The |
| * socket needs to be opened and then connected or accepted before data can |
| * be sent or received on it. |
| * |
| * @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_seq_packet_socket(const executor_type& ex) |
| : basic_socket<Protocol, Executor>(ex) |
| { |
| } |
| |
| /// Construct a basic_seq_packet_socket without opening it. |
| /** |
| * This constructor creates a sequenced packet socket without opening it. The |
| * socket needs to be opened and then connected or accepted before data can |
| * be sent or received on it. |
| * |
| * @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_seq_packet_socket(ExecutionContext& context, |
| typename enable_if< |
| is_convertible<ExecutionContext&, execution_context&>::value |
| >::type* = 0) |
| : basic_socket<Protocol, Executor>(context) |
| { |
| } |
| |
| /// Construct and open a basic_seq_packet_socket. |
| /** |
| * This constructor creates and opens a sequenced_packet socket. The socket |
| * needs to be connected or accepted before data can be sent or received on |
| * it. |
| * |
| * @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 asio::system_error Thrown on failure. |
| */ |
| basic_seq_packet_socket(const executor_type& ex, |
| const protocol_type& protocol) |
| : basic_socket<Protocol, Executor>(ex, protocol) |
| { |
| } |
| |
| /// Construct and open a basic_seq_packet_socket. |
| /** |
| * This constructor creates and opens a sequenced_packet socket. The socket |
| * needs to be connected or accepted before data can be sent or received on |
| * it. |
| * |
| * @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 asio::system_error Thrown on failure. |
| */ |
| template <typename ExecutionContext> |
| basic_seq_packet_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_seq_packet_socket, opening it and binding it to the |
| /// given local endpoint. |
| /** |
| * This constructor creates a sequenced packet 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 sequenced |
| * packet socket will be bound. |
| * |
| * @throws asio::system_error Thrown on failure. |
| */ |
| basic_seq_packet_socket(const executor_type& ex, |
| const endpoint_type& endpoint) |
| : basic_socket<Protocol, Executor>(ex, endpoint) |
| { |
| } |
| |
| /// Construct a basic_seq_packet_socket, opening it and binding it to the |
| /// given local endpoint. |
| /** |
| * This constructor creates a sequenced packet 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 sequenced |
| * packet socket will be bound. |
| * |
| * @throws asio::system_error Thrown on failure. |
| */ |
| template <typename ExecutionContext> |
| basic_seq_packet_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_seq_packet_socket on an existing native socket. |
| /** |
| * This constructor creates a sequenced packet 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 asio::system_error Thrown on failure. |
| */ |
| basic_seq_packet_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_seq_packet_socket on an existing native socket. |
| /** |
| * This constructor creates a sequenced packet 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 asio::system_error Thrown on failure. |
| */ |
| template <typename ExecutionContext> |
| basic_seq_packet_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(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION) |
| /// Move-construct a basic_seq_packet_socket from another. |
| /** |
| * This constructor moves a sequenced packet socket from one object to |
| * another. |
| * |
| * @param other The other basic_seq_packet_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_seq_packet_socket(const executor_type&) |
| * constructor. |
| */ |
| basic_seq_packet_socket(basic_seq_packet_socket&& other) ASIO_NOEXCEPT |
| : basic_socket<Protocol, Executor>(std::move(other)) |
| { |
| } |
| |
| /// Move-assign a basic_seq_packet_socket from another. |
| /** |
| * This assignment operator moves a sequenced packet socket from one object to |
| * another. |
| * |
| * @param other The other basic_seq_packet_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_seq_packet_socket(const executor_type&) |
| * constructor. |
| */ |
| basic_seq_packet_socket& operator=(basic_seq_packet_socket&& other) |
| { |
| basic_socket<Protocol, Executor>::operator=(std::move(other)); |
| return *this; |
| } |
| |
| /// Move-construct a basic_seq_packet_socket from a socket of another protocol |
| /// type. |
| /** |
| * This constructor moves a sequenced packet socket from one object to |
| * another. |
| * |
| * @param other The other basic_seq_packet_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_seq_packet_socket(const executor_type&) |
| * constructor. |
| */ |
| template <typename Protocol1, typename Executor1> |
| basic_seq_packet_socket(basic_seq_packet_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_seq_packet_socket from a socket of another protocol |
| /// type. |
| /** |
| * This assignment operator moves a sequenced packet socket from one object to |
| * another. |
| * |
| * @param other The other basic_seq_packet_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_seq_packet_socket(const executor_type&) |
| * constructor. |
| */ |
| template <typename Protocol1, typename Executor1> |
| typename enable_if< |
| is_convertible<Protocol1, Protocol>::value |
| && is_convertible<Executor1, Executor>::value, |
| basic_seq_packet_socket& |
| >::type operator=(basic_seq_packet_socket<Protocol1, Executor1>&& other) |
| { |
| basic_socket<Protocol, Executor>::operator=(std::move(other)); |
| return *this; |
| } |
| #endif // defined(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_seq_packet_socket() |
| { |
| } |
| |
| /// Send some data on the socket. |
| /** |
| * This function is used to send data on the sequenced packet socket. The |
| * function call will block until the data has been sent successfully, or an |
| * until 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. |
| * |
| * @returns The number of bytes sent. |
| * |
| * @throws asio::system_error Thrown on failure. |
| * |
| * @par Example |
| * To send a single data buffer use the @ref buffer function as follows: |
| * @code |
| * socket.send(asio::buffer(data, size), 0); |
| * @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, |
| socket_base::message_flags flags) |
| { |
| asio::error_code ec; |
| std::size_t s = this->impl_.get_service().send( |
| this->impl_.get_implementation(), buffers, flags, ec); |
| asio::detail::throw_error(ec, "send"); |
| return s; |
| } |
| |
| /// Send some data on the socket. |
| /** |
| * This function is used to send data on the sequenced packet socket. The |
| * function call will block the data has been sent successfully, or an until |
| * 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. Returns 0 if an error occurred. |
| * |
| * @note The send operation may not transmit all of the data to the peer. |
| * Consider using the @ref write function if you need to ensure that all data |
| * is written before the blocking operation completes. |
| */ |
| template <typename ConstBufferSequence> |
| std::size_t send(const ConstBufferSequence& buffers, |
| socket_base::message_flags flags, asio::error_code& ec) |
| { |
| return this->impl_.get_service().send( |
| this->impl_.get_implementation(), buffers, flags, ec); |
| } |
| |
| /// Start an asynchronous send. |
| /** |
| * This function is used to asynchronously send data on the sequenced packet |
| * 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 asio::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 asio::post(). |
| * |
| * @par Example |
| * To send a single data buffer use the @ref buffer function as follows: |
| * @code |
| * socket.async_send(asio::buffer(data, size), 0, 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, |
| ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code, |
| std::size_t)) WriteHandler |
| ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)> |
| ASIO_INITFN_AUTO_RESULT_TYPE(WriteHandler, |
| void (asio::error_code, std::size_t)) |
| async_send(const ConstBufferSequence& buffers, |
| socket_base::message_flags flags, |
| ASIO_MOVE_ARG(WriteHandler) handler |
| ASIO_DEFAULT_COMPLETION_TOKEN(executor_type)) |
| { |
| return async_initiate<WriteHandler, |
| void (asio::error_code, std::size_t)>( |
| initiate_async_send(this), handler, buffers, flags); |
| } |
| |
| /// Receive some data on the socket. |
| /** |
| * This function is used to receive data on the sequenced packet socket. The |
| * function call will block until data has been received successfully, or |
| * until an error occurs. |
| * |
| * @param buffers One or more buffers into which the data will be received. |
| * |
| * @param out_flags After the receive call completes, contains flags |
| * associated with the received data. For example, if the |
| * socket_base::message_end_of_record bit is set then the received data marks |
| * the end of a record. |
| * |
| * @returns The number of bytes received. |
| * |
| * @throws asio::system_error Thrown on failure. An error code of |
| * asio::error::eof indicates that the connection was closed by the |
| * peer. |
| * |
| * @par Example |
| * To receive into a single data buffer use the @ref buffer function as |
| * follows: |
| * @code |
| * socket.receive(asio::buffer(data, size), out_flags); |
| * @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, |
| socket_base::message_flags& out_flags) |
| { |
| asio::error_code ec; |
| std::size_t s = this->impl_.get_service().receive_with_flags( |
| this->impl_.get_implementation(), buffers, 0, out_flags, ec); |
| asio::detail::throw_error(ec, "receive"); |
| return s; |
| } |
| |
| /// Receive some data on the socket. |
| /** |
| * This function is used to receive data on the sequenced packet socket. The |
| * function call will block until data has been received successfully, or |
| * until an error occurs. |
| * |
| * @param buffers One or more buffers into which the data will be received. |
| * |
| * @param in_flags Flags specifying how the receive call is to be made. |
| * |
| * @param out_flags After the receive call completes, contains flags |
| * associated with the received data. For example, if the |
| * socket_base::message_end_of_record bit is set then the received data marks |
| * the end of a record. |
| * |
| * @returns The number of bytes received. |
| * |
| * @throws asio::system_error Thrown on failure. An error code of |
| * asio::error::eof indicates that the connection was closed by the |
| * peer. |
| * |
| * @note The receive operation may not receive all of the requested number of |
| * bytes. Consider using the @ref read function if you need to ensure that the |
| * requested amount of data is read before the blocking operation completes. |
| * |
| * @par Example |
| * To receive into a single data buffer use the @ref buffer function as |
| * follows: |
| * @code |
| * socket.receive(asio::buffer(data, size), 0, out_flags); |
| * @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, |
| socket_base::message_flags in_flags, |
| socket_base::message_flags& out_flags) |
| { |
| asio::error_code ec; |
| std::size_t s = this->impl_.get_service().receive_with_flags( |
| this->impl_.get_implementation(), buffers, in_flags, out_flags, ec); |
| asio::detail::throw_error(ec, "receive"); |
| return s; |
| } |
| |
| /// Receive some data on a connected socket. |
| /** |
| * This function is used to receive data on the sequenced packet socket. The |
| * function call will block until data has been received successfully, or |
| * until an error occurs. |
| * |
| * @param buffers One or more buffers into which the data will be received. |
| * |
| * @param in_flags Flags specifying how the receive call is to be made. |
| * |
| * @param out_flags After the receive call completes, contains flags |
| * associated with the received data. For example, if the |
| * socket_base::message_end_of_record bit is set then the received data marks |
| * the end of a record. |
| * |
| * @param ec Set to indicate what error occurred, if any. |
| * |
| * @returns The number of bytes received. Returns 0 if an error occurred. |
| * |
| * @note The receive operation may not receive all of the requested number of |
| * bytes. Consider using the @ref read function if you need to ensure that the |
| * requested amount of data is read before the blocking operation completes. |
| */ |
| template <typename MutableBufferSequence> |
| std::size_t receive(const MutableBufferSequence& buffers, |
| socket_base::message_flags in_flags, |
| socket_base::message_flags& out_flags, asio::error_code& ec) |
| { |
| return this->impl_.get_service().receive_with_flags( |
| this->impl_.get_implementation(), buffers, in_flags, out_flags, ec); |
| } |
| |
| /// Start an asynchronous receive. |
| /** |
| * This function is used to asynchronously receive data from the sequenced |
| * packet 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 out_flags Once the asynchronous operation completes, contains flags |
| * associated with the received data. For example, if the |
| * socket_base::message_end_of_record bit is set then the received data marks |
| * the end of a record. The caller must guarantee that the referenced |
| * variable remains 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. On |
| * immediate completion, invocation of the handler will be performed in a |
| * manner equivalent to using asio::post(). |
| * |
| * @par Example |
| * To receive into a single data buffer use the @ref buffer function as |
| * follows: |
| * @code |
| * socket.async_receive(asio::buffer(data, size), out_flags, 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, |
| ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code, |
| std::size_t)) ReadHandler |
| ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)> |
| ASIO_INITFN_AUTO_RESULT_TYPE(ReadHandler, |
| void (asio::error_code, std::size_t)) |
| async_receive(const MutableBufferSequence& buffers, |
| socket_base::message_flags& out_flags, |
| ASIO_MOVE_ARG(ReadHandler) handler |
| ASIO_DEFAULT_COMPLETION_TOKEN(executor_type)) |
| { |
| return async_initiate<ReadHandler, |
| void (asio::error_code, std::size_t)>( |
| initiate_async_receive_with_flags(this), handler, |
| buffers, socket_base::message_flags(0), &out_flags); |
| } |
| |
| /// Start an asynchronous receive. |
| /** |
| * This function is used to asynchronously receive data from the sequenced |
| * data 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 in_flags Flags specifying how the receive call is to be made. |
| * |
| * @param out_flags Once the asynchronous operation completes, contains flags |
| * associated with the received data. For example, if the |
| * socket_base::message_end_of_record bit is set then the received data marks |
| * the end of a record. The caller must guarantee that the referenced |
| * variable remains 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. On |
| * immediate completion, invocation of the handler will be performed in a |
| * manner equivalent to using asio::post(). |
| * |
| * @par Example |
| * To receive into a single data buffer use the @ref buffer function as |
| * follows: |
| * @code |
| * socket.async_receive( |
| * asio::buffer(data, size), |
| * 0, out_flags, 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, |
| ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code, |
| std::size_t)) ReadHandler |
| ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(executor_type)> |
| ASIO_INITFN_AUTO_RESULT_TYPE(ReadHandler, |
| void (asio::error_code, std::size_t)) |
| async_receive(const MutableBufferSequence& buffers, |
| socket_base::message_flags in_flags, |
| socket_base::message_flags& out_flags, |
| ASIO_MOVE_ARG(ReadHandler) handler |
| ASIO_DEFAULT_COMPLETION_TOKEN(executor_type)) |
| { |
| return async_initiate<ReadHandler, |
| void (asio::error_code, std::size_t)>( |
| initiate_async_receive_with_flags(this), |
| handler, buffers, in_flags, &out_flags); |
| } |
| |
| private: |
| // Disallow copying and assignment. |
| basic_seq_packet_socket(const basic_seq_packet_socket&) ASIO_DELETED; |
| basic_seq_packet_socket& operator=( |
| const basic_seq_packet_socket&) ASIO_DELETED; |
| |
| class initiate_async_send |
| { |
| public: |
| typedef Executor executor_type; |
| |
| explicit initiate_async_send(basic_seq_packet_socket* self) |
| : self_(self) |
| { |
| } |
| |
| executor_type get_executor() const ASIO_NOEXCEPT |
| { |
| return self_->get_executor(); |
| } |
| |
| template <typename WriteHandler, typename ConstBufferSequence> |
| void operator()(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. |
| 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_seq_packet_socket* self_; |
| }; |
| |
| class initiate_async_receive_with_flags |
| { |
| public: |
| typedef Executor executor_type; |
| |
| explicit initiate_async_receive_with_flags(basic_seq_packet_socket* self) |
| : self_(self) |
| { |
| } |
| |
| executor_type get_executor() const ASIO_NOEXCEPT |
| { |
| return self_->get_executor(); |
| } |
| |
| template <typename ReadHandler, typename MutableBufferSequence> |
| void operator()(ASIO_MOVE_ARG(ReadHandler) handler, |
| const MutableBufferSequence& buffers, |
| socket_base::message_flags in_flags, |
| socket_base::message_flags* out_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. |
| ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check; |
| |
| detail::non_const_lvalue<ReadHandler> handler2(handler); |
| self_->impl_.get_service().async_receive_with_flags( |
| self_->impl_.get_implementation(), buffers, in_flags, |
| *out_flags, handler2.value, self_->impl_.get_executor()); |
| } |
| |
| private: |
| basic_seq_packet_socket* self_; |
| }; |
| }; |
| |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // ASIO_BASIC_SEQ_PACKET_SOCKET_HPP |