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Diffstat (limited to 'lib/asio/basic_socket.hpp')
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diff --git a/lib/asio/basic_socket.hpp b/lib/asio/basic_socket.hpp new file mode 100644 index 0000000..3dfacb4 --- /dev/null +++ b/lib/asio/basic_socket.hpp @@ -0,0 +1,1757 @@ +// +// basic_socket.hpp +// ~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2018 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_SOCKET_HPP +#define ASIO_BASIC_SOCKET_HPP + +#if defined(_MSC_VER) && (_MSC_VER >= 1200) +# pragma once +#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) + +#include "asio/detail/config.hpp" +#include "asio/async_result.hpp" +#include "asio/basic_io_object.hpp" +#include "asio/detail/handler_type_requirements.hpp" +#include "asio/detail/throw_error.hpp" +#include "asio/detail/type_traits.hpp" +#include "asio/error.hpp" +#include "asio/post.hpp" +#include "asio/socket_base.hpp" + +#if defined(ASIO_HAS_MOVE) +# include <utility> +#endif // defined(ASIO_HAS_MOVE) + +#if !defined(ASIO_ENABLE_OLD_SERVICES) +# if defined(ASIO_WINDOWS_RUNTIME) +# include "asio/detail/winrt_ssocket_service.hpp" +# define ASIO_SVC_T detail::winrt_ssocket_service<Protocol> +# elif defined(ASIO_HAS_IOCP) +# include "asio/detail/win_iocp_socket_service.hpp" +# define ASIO_SVC_T detail::win_iocp_socket_service<Protocol> +# else +# include "asio/detail/reactive_socket_service.hpp" +# define ASIO_SVC_T detail::reactive_socket_service<Protocol> +# endif +#endif // !defined(ASIO_ENABLE_OLD_SERVICES) + +#include "asio/detail/push_options.hpp" + +namespace asio { + +/// Provides socket functionality. +/** + * The basic_socket class template provides functionality that is common to both + * stream-oriented and datagram-oriented sockets. + * + * @par Thread Safety + * @e Distinct @e objects: Safe.@n + * @e Shared @e objects: Unsafe. + */ +template <typename Protocol ASIO_SVC_TPARAM> +class basic_socket + : ASIO_SVC_ACCESS basic_io_object<ASIO_SVC_T>, + public socket_base +{ +public: + /// The type of the executor associated with the object. + typedef io_context::executor_type executor_type; + + /// The native representation of a socket. +#if defined(GENERATING_DOCUMENTATION) + typedef implementation_defined native_handle_type; +#else + typedef typename ASIO_SVC_T::native_handle_type native_handle_type; +#endif + + /// The protocol type. + typedef Protocol protocol_type; + + /// The endpoint type. + typedef typename Protocol::endpoint endpoint_type; + +#if !defined(ASIO_NO_EXTENSIONS) + /// A basic_socket is always the lowest layer. + typedef basic_socket<Protocol ASIO_SVC_TARG> lowest_layer_type; +#endif // !defined(ASIO_NO_EXTENSIONS) + + /// Construct a basic_socket without opening it. + /** + * This constructor creates a socket without opening it. + * + * @param io_context The io_context object that the socket will use to + * dispatch handlers for any asynchronous operations performed on the socket. + */ + explicit basic_socket(asio::io_context& io_context) + : basic_io_object<ASIO_SVC_T>(io_context) + { + } + + /// Construct and open a basic_socket. + /** + * This constructor creates and opens a socket. + * + * @param io_context The io_context object that the socket will use 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_socket(asio::io_context& io_context, + const protocol_type& protocol) + : basic_io_object<ASIO_SVC_T>(io_context) + { + asio::error_code ec; + this->get_service().open(this->get_implementation(), protocol, ec); + asio::detail::throw_error(ec, "open"); + } + + /// Construct a basic_socket, opening it and binding it to the given local + /// endpoint. + /** + * This constructor creates a 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 io_context The io_context object that the socket will use to + * dispatch handlers for any asynchronous operations performed on the socket. + * + * @param endpoint An endpoint on the local machine to which the socket will + * be bound. + * + * @throws asio::system_error Thrown on failure. + */ + basic_socket(asio::io_context& io_context, + const endpoint_type& endpoint) + : basic_io_object<ASIO_SVC_T>(io_context) + { + asio::error_code ec; + const protocol_type protocol = endpoint.protocol(); + this->get_service().open(this->get_implementation(), protocol, ec); + asio::detail::throw_error(ec, "open"); + this->get_service().bind(this->get_implementation(), endpoint, ec); + asio::detail::throw_error(ec, "bind"); + } + + /// Construct a basic_socket on an existing native socket. + /** + * This constructor creates a socket object to hold an existing native socket. + * + * @param io_context The io_context object that the socket will use to + * dispatch handlers for any asynchronous operations performed on the socket. + * + * @param protocol An object specifying protocol parameters to be used. + * + * @param native_socket A native socket. + * + * @throws asio::system_error Thrown on failure. + */ + basic_socket(asio::io_context& io_context, + const protocol_type& protocol, const native_handle_type& native_socket) + : basic_io_object<ASIO_SVC_T>(io_context) + { + asio::error_code ec; + this->get_service().assign(this->get_implementation(), + protocol, native_socket, ec); + asio::detail::throw_error(ec, "assign"); + } + +#if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION) + /// Move-construct a basic_socket from another. + /** + * This constructor moves a socket from one object to another. + * + * @param other The other basic_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_socket(io_context&) constructor. + */ + basic_socket(basic_socket&& other) + : basic_io_object<ASIO_SVC_T>(std::move(other)) + { + } + + /// Move-assign a basic_socket from another. + /** + * This assignment operator moves a socket from one object to another. + * + * @param other The other basic_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_socket(io_context&) constructor. + */ + basic_socket& operator=(basic_socket&& other) + { + basic_io_object<ASIO_SVC_T>::operator=(std::move(other)); + return *this; + } + + // All sockets have access to each other's implementations. + template <typename Protocol1 ASIO_SVC_TPARAM1> + friend class basic_socket; + + /// Move-construct a basic_socket from a socket of another protocol type. + /** + * This constructor moves a socket from one object to another. + * + * @param other The other basic_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_socket(io_context&) constructor. + */ + template <typename Protocol1 ASIO_SVC_TPARAM1> + basic_socket(basic_socket<Protocol1 ASIO_SVC_TARG1>&& other, + typename enable_if<is_convertible<Protocol1, Protocol>::value>::type* = 0) + : basic_io_object<ASIO_SVC_T>( + other.get_service(), other.get_implementation()) + { + } + + /// Move-assign a basic_socket from a socket of another protocol type. + /** + * This assignment operator moves a socket from one object to another. + * + * @param other The other basic_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_socket(io_context&) constructor. + */ + template <typename Protocol1 ASIO_SVC_TPARAM1> + typename enable_if<is_convertible<Protocol1, Protocol>::value, + basic_socket>::type& operator=( + basic_socket<Protocol1 ASIO_SVC_TARG1>&& other) + { + basic_socket tmp(std::move(other)); + basic_io_object<ASIO_SVC_T>::operator=(std::move(tmp)); + return *this; + } +#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION) + +#if defined(ASIO_ENABLE_OLD_SERVICES) + // These functions are provided by basic_io_object<>. +#else // defined(ASIO_ENABLE_OLD_SERVICES) +#if !defined(ASIO_NO_DEPRECATED) + /// (Deprecated: Use get_executor().) Get the io_context associated with the + /// object. + /** + * This function may be used to obtain the io_context object that the I/O + * object uses to dispatch handlers for asynchronous operations. + * + * @return A reference to the io_context object that the I/O object will use + * to dispatch handlers. Ownership is not transferred to the caller. + */ + asio::io_context& get_io_context() + { + return basic_io_object<ASIO_SVC_T>::get_io_context(); + } + + /// (Deprecated: Use get_executor().) Get the io_context associated with the + /// object. + /** + * This function may be used to obtain the io_context object that the I/O + * object uses to dispatch handlers for asynchronous operations. + * + * @return A reference to the io_context object that the I/O object will use + * to dispatch handlers. Ownership is not transferred to the caller. + */ + asio::io_context& get_io_service() + { + return basic_io_object<ASIO_SVC_T>::get_io_service(); + } +#endif // !defined(ASIO_NO_DEPRECATED) + + /// Get the executor associated with the object. + executor_type get_executor() ASIO_NOEXCEPT + { + return basic_io_object<ASIO_SVC_T>::get_executor(); + } +#endif // defined(ASIO_ENABLE_OLD_SERVICES) + +#if !defined(ASIO_NO_EXTENSIONS) + /// Get a reference to the lowest layer. + /** + * This function returns a reference to the lowest layer in a stack of + * layers. Since a basic_socket cannot contain any further layers, it simply + * returns a reference to itself. + * + * @return A reference to the lowest layer in the stack of layers. Ownership + * is not transferred to the caller. + */ + lowest_layer_type& lowest_layer() + { + return *this; + } + + /// Get a const reference to the lowest layer. + /** + * This function returns a const reference to the lowest layer in a stack of + * layers. Since a basic_socket cannot contain any further layers, it simply + * returns a reference to itself. + * + * @return A const reference to the lowest layer in the stack of layers. + * Ownership is not transferred to the caller. + */ + const lowest_layer_type& lowest_layer() const + { + return *this; + } +#endif // !defined(ASIO_NO_EXTENSIONS) + + /// Open the socket using the specified protocol. + /** + * This function opens the socket so that it will use the specified protocol. + * + * @param protocol An object specifying protocol parameters to be used. + * + * @throws asio::system_error Thrown on failure. + * + * @par Example + * @code + * asio::ip::tcp::socket socket(io_context); + * socket.open(asio::ip::tcp::v4()); + * @endcode + */ + void open(const protocol_type& protocol = protocol_type()) + { + asio::error_code ec; + this->get_service().open(this->get_implementation(), protocol, ec); + asio::detail::throw_error(ec, "open"); + } + + /// Open the socket using the specified protocol. + /** + * This function opens the socket so that it will use the specified protocol. + * + * @param protocol An object specifying which protocol is to be used. + * + * @param ec Set to indicate what error occurred, if any. + * + * @par Example + * @code + * asio::ip::tcp::socket socket(io_context); + * asio::error_code ec; + * socket.open(asio::ip::tcp::v4(), ec); + * if (ec) + * { + * // An error occurred. + * } + * @endcode + */ + ASIO_SYNC_OP_VOID open(const protocol_type& protocol, + asio::error_code& ec) + { + this->get_service().open(this->get_implementation(), protocol, ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Assign an existing native socket to the socket. + /* + * This function opens the socket to hold an existing native socket. + * + * @param protocol An object specifying which protocol is to be used. + * + * @param native_socket A native socket. + * + * @throws asio::system_error Thrown on failure. + */ + void assign(const protocol_type& protocol, + const native_handle_type& native_socket) + { + asio::error_code ec; + this->get_service().assign(this->get_implementation(), + protocol, native_socket, ec); + asio::detail::throw_error(ec, "assign"); + } + + /// Assign an existing native socket to the socket. + /* + * This function opens the socket to hold an existing native socket. + * + * @param protocol An object specifying which protocol is to be used. + * + * @param native_socket A native socket. + * + * @param ec Set to indicate what error occurred, if any. + */ + ASIO_SYNC_OP_VOID assign(const protocol_type& protocol, + const native_handle_type& native_socket, asio::error_code& ec) + { + this->get_service().assign(this->get_implementation(), + protocol, native_socket, ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Determine whether the socket is open. + bool is_open() const + { + return this->get_service().is_open(this->get_implementation()); + } + + /// Close the socket. + /** + * This function is used to close the socket. Any asynchronous send, receive + * or connect operations will be cancelled immediately, and will complete + * with the asio::error::operation_aborted error. + * + * @throws asio::system_error Thrown on failure. Note that, even if + * the function indicates an error, the underlying descriptor is closed. + * + * @note For portable behaviour with respect to graceful closure of a + * connected socket, call shutdown() before closing the socket. + */ + void close() + { + asio::error_code ec; + this->get_service().close(this->get_implementation(), ec); + asio::detail::throw_error(ec, "close"); + } + + /// Close the socket. + /** + * This function is used to close the socket. Any asynchronous send, receive + * or connect operations will be cancelled immediately, and will complete + * with the asio::error::operation_aborted error. + * + * @param ec Set to indicate what error occurred, if any. Note that, even if + * the function indicates an error, the underlying descriptor is closed. + * + * @par Example + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::error_code ec; + * socket.close(ec); + * if (ec) + * { + * // An error occurred. + * } + * @endcode + * + * @note For portable behaviour with respect to graceful closure of a + * connected socket, call shutdown() before closing the socket. + */ + ASIO_SYNC_OP_VOID close(asio::error_code& ec) + { + this->get_service().close(this->get_implementation(), ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Release ownership of the underlying native socket. + /** + * This function causes all outstanding asynchronous connect, send and receive + * operations to finish immediately, and the handlers for cancelled operations + * will be passed the asio::error::operation_aborted error. Ownership + * of the native socket is then transferred to the caller. + * + * @throws asio::system_error Thrown on failure. + * + * @note This function is unsupported on Windows versions prior to Windows + * 8.1, and will fail with asio::error::operation_not_supported on + * these platforms. + */ +#if defined(ASIO_MSVC) && (ASIO_MSVC >= 1400) \ + && (!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0603) + __declspec(deprecated("This function always fails with " + "operation_not_supported when used on Windows versions " + "prior to Windows 8.1.")) +#endif + native_handle_type release() + { + asio::error_code ec; + native_handle_type s = this->get_service().release( + this->get_implementation(), ec); + asio::detail::throw_error(ec, "release"); + return s; + } + + /// Release ownership of the underlying native socket. + /** + * This function causes all outstanding asynchronous connect, send and receive + * operations to finish immediately, and the handlers for cancelled operations + * will be passed the asio::error::operation_aborted error. Ownership + * of the native socket is then transferred to the caller. + * + * @param ec Set to indicate what error occurred, if any. + * + * @note This function is unsupported on Windows versions prior to Windows + * 8.1, and will fail with asio::error::operation_not_supported on + * these platforms. + */ +#if defined(ASIO_MSVC) && (ASIO_MSVC >= 1400) \ + && (!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0603) + __declspec(deprecated("This function always fails with " + "operation_not_supported when used on Windows versions " + "prior to Windows 8.1.")) +#endif + native_handle_type release(asio::error_code& ec) + { + return this->get_service().release(this->get_implementation(), ec); + } + + /// Get the native socket representation. + /** + * This function may be used to obtain the underlying representation of the + * socket. This is intended to allow access to native socket functionality + * that is not otherwise provided. + */ + native_handle_type native_handle() + { + return this->get_service().native_handle(this->get_implementation()); + } + + /// Cancel all asynchronous operations associated with the socket. + /** + * This function causes all outstanding asynchronous connect, send and receive + * operations to finish immediately, and the handlers for cancelled operations + * will be passed the asio::error::operation_aborted error. + * + * @throws asio::system_error Thrown on failure. + * + * @note Calls to cancel() will always fail with + * asio::error::operation_not_supported when run on Windows XP, Windows + * Server 2003, and earlier versions of Windows, unless + * ASIO_ENABLE_CANCELIO is defined. However, the CancelIo function has + * two issues that should be considered before enabling its use: + * + * @li It will only cancel asynchronous operations that were initiated in the + * current thread. + * + * @li It can appear to complete without error, but the request to cancel the + * unfinished operations may be silently ignored by the operating system. + * Whether it works or not seems to depend on the drivers that are installed. + * + * For portable cancellation, consider using one of the following + * alternatives: + * + * @li Disable asio's I/O completion port backend by defining + * ASIO_DISABLE_IOCP. + * + * @li Use the close() function to simultaneously cancel the outstanding + * operations and close the socket. + * + * When running on Windows Vista, Windows Server 2008, and later, the + * CancelIoEx function is always used. This function does not have the + * problems described above. + */ +#if defined(ASIO_MSVC) && (ASIO_MSVC >= 1400) \ + && (!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600) \ + && !defined(ASIO_ENABLE_CANCELIO) + __declspec(deprecated("By default, this function always fails with " + "operation_not_supported when used on Windows XP, Windows Server 2003, " + "or earlier. Consult documentation for details.")) +#endif + void cancel() + { + asio::error_code ec; + this->get_service().cancel(this->get_implementation(), ec); + asio::detail::throw_error(ec, "cancel"); + } + + /// Cancel all asynchronous operations associated with the socket. + /** + * This function causes all outstanding asynchronous connect, send and receive + * operations to finish immediately, and the handlers for cancelled operations + * will be passed the asio::error::operation_aborted error. + * + * @param ec Set to indicate what error occurred, if any. + * + * @note Calls to cancel() will always fail with + * asio::error::operation_not_supported when run on Windows XP, Windows + * Server 2003, and earlier versions of Windows, unless + * ASIO_ENABLE_CANCELIO is defined. However, the CancelIo function has + * two issues that should be considered before enabling its use: + * + * @li It will only cancel asynchronous operations that were initiated in the + * current thread. + * + * @li It can appear to complete without error, but the request to cancel the + * unfinished operations may be silently ignored by the operating system. + * Whether it works or not seems to depend on the drivers that are installed. + * + * For portable cancellation, consider using one of the following + * alternatives: + * + * @li Disable asio's I/O completion port backend by defining + * ASIO_DISABLE_IOCP. + * + * @li Use the close() function to simultaneously cancel the outstanding + * operations and close the socket. + * + * When running on Windows Vista, Windows Server 2008, and later, the + * CancelIoEx function is always used. This function does not have the + * problems described above. + */ +#if defined(ASIO_MSVC) && (ASIO_MSVC >= 1400) \ + && (!defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600) \ + && !defined(ASIO_ENABLE_CANCELIO) + __declspec(deprecated("By default, this function always fails with " + "operation_not_supported when used on Windows XP, Windows Server 2003, " + "or earlier. Consult documentation for details.")) +#endif + ASIO_SYNC_OP_VOID cancel(asio::error_code& ec) + { + this->get_service().cancel(this->get_implementation(), ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Determine whether the socket is at the out-of-band data mark. + /** + * This function is used to check whether the socket input is currently + * positioned at the out-of-band data mark. + * + * @return A bool indicating whether the socket is at the out-of-band data + * mark. + * + * @throws asio::system_error Thrown on failure. + */ + bool at_mark() const + { + asio::error_code ec; + bool b = this->get_service().at_mark(this->get_implementation(), ec); + asio::detail::throw_error(ec, "at_mark"); + return b; + } + + /// Determine whether the socket is at the out-of-band data mark. + /** + * This function is used to check whether the socket input is currently + * positioned at the out-of-band data mark. + * + * @param ec Set to indicate what error occurred, if any. + * + * @return A bool indicating whether the socket is at the out-of-band data + * mark. + */ + bool at_mark(asio::error_code& ec) const + { + return this->get_service().at_mark(this->get_implementation(), ec); + } + + /// Determine the number of bytes available for reading. + /** + * This function is used to determine the number of bytes that may be read + * without blocking. + * + * @return The number of bytes that may be read without blocking, or 0 if an + * error occurs. + * + * @throws asio::system_error Thrown on failure. + */ + std::size_t available() const + { + asio::error_code ec; + std::size_t s = this->get_service().available( + this->get_implementation(), ec); + asio::detail::throw_error(ec, "available"); + return s; + } + + /// Determine the number of bytes available for reading. + /** + * This function is used to determine the number of bytes that may be read + * without blocking. + * + * @param ec Set to indicate what error occurred, if any. + * + * @return The number of bytes that may be read without blocking, or 0 if an + * error occurs. + */ + std::size_t available(asio::error_code& ec) const + { + return this->get_service().available(this->get_implementation(), ec); + } + + /// Bind the socket to the given local endpoint. + /** + * This function binds the socket to the specified endpoint on the local + * machine. + * + * @param endpoint An endpoint on the local machine to which the socket will + * be bound. + * + * @throws asio::system_error Thrown on failure. + * + * @par Example + * @code + * asio::ip::tcp::socket socket(io_context); + * socket.open(asio::ip::tcp::v4()); + * socket.bind(asio::ip::tcp::endpoint( + * asio::ip::tcp::v4(), 12345)); + * @endcode + */ + void bind(const endpoint_type& endpoint) + { + asio::error_code ec; + this->get_service().bind(this->get_implementation(), endpoint, ec); + asio::detail::throw_error(ec, "bind"); + } + + /// Bind the socket to the given local endpoint. + /** + * This function binds the socket to the specified endpoint on the local + * machine. + * + * @param endpoint An endpoint on the local machine to which the socket will + * be bound. + * + * @param ec Set to indicate what error occurred, if any. + * + * @par Example + * @code + * asio::ip::tcp::socket socket(io_context); + * socket.open(asio::ip::tcp::v4()); + * asio::error_code ec; + * socket.bind(asio::ip::tcp::endpoint( + * asio::ip::tcp::v4(), 12345), ec); + * if (ec) + * { + * // An error occurred. + * } + * @endcode + */ + ASIO_SYNC_OP_VOID bind(const endpoint_type& endpoint, + asio::error_code& ec) + { + this->get_service().bind(this->get_implementation(), endpoint, ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Connect the socket to the specified endpoint. + /** + * This function is used to connect a socket to the specified remote endpoint. + * The function call will block until the connection is successfully made or + * an error occurs. + * + * The socket is automatically opened if it is not already open. If the + * connect fails, and the socket was automatically opened, the socket is + * not returned to the closed state. + * + * @param peer_endpoint The remote endpoint to which the socket will be + * connected. + * + * @throws asio::system_error Thrown on failure. + * + * @par Example + * @code + * asio::ip::tcp::socket socket(io_context); + * asio::ip::tcp::endpoint endpoint( + * asio::ip::address::from_string("1.2.3.4"), 12345); + * socket.connect(endpoint); + * @endcode + */ + void connect(const endpoint_type& peer_endpoint) + { + asio::error_code ec; + if (!is_open()) + { + this->get_service().open(this->get_implementation(), + peer_endpoint.protocol(), ec); + asio::detail::throw_error(ec, "connect"); + } + this->get_service().connect(this->get_implementation(), peer_endpoint, ec); + asio::detail::throw_error(ec, "connect"); + } + + /// Connect the socket to the specified endpoint. + /** + * This function is used to connect a socket to the specified remote endpoint. + * The function call will block until the connection is successfully made or + * an error occurs. + * + * The socket is automatically opened if it is not already open. If the + * connect fails, and the socket was automatically opened, the socket is + * not returned to the closed state. + * + * @param peer_endpoint The remote endpoint to which the socket will be + * connected. + * + * @param ec Set to indicate what error occurred, if any. + * + * @par Example + * @code + * asio::ip::tcp::socket socket(io_context); + * asio::ip::tcp::endpoint endpoint( + * asio::ip::address::from_string("1.2.3.4"), 12345); + * asio::error_code ec; + * socket.connect(endpoint, ec); + * if (ec) + * { + * // An error occurred. + * } + * @endcode + */ + ASIO_SYNC_OP_VOID connect(const endpoint_type& peer_endpoint, + asio::error_code& ec) + { + if (!is_open()) + { + this->get_service().open(this->get_implementation(), + peer_endpoint.protocol(), ec); + if (ec) + { + ASIO_SYNC_OP_VOID_RETURN(ec); + } + } + + this->get_service().connect(this->get_implementation(), peer_endpoint, ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Start an asynchronous connect. + /** + * This function is used to asynchronously connect a socket to the specified + * remote endpoint. The function call always returns immediately. + * + * The socket is automatically opened if it is not already open. If the + * connect fails, and the socket was automatically opened, the socket is + * not returned to the closed state. + * + * @param peer_endpoint The remote endpoint to which the socket will be + * connected. Copies will be made of the endpoint object as required. + * + * @param handler The handler to be called when the connection 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 + * ); @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_context::post(). + * + * @par Example + * @code + * void connect_handler(const asio::error_code& error) + * { + * if (!error) + * { + * // Connect succeeded. + * } + * } + * + * ... + * + * asio::ip::tcp::socket socket(io_context); + * asio::ip::tcp::endpoint endpoint( + * asio::ip::address::from_string("1.2.3.4"), 12345); + * socket.async_connect(endpoint, connect_handler); + * @endcode + */ + template <typename ConnectHandler> + ASIO_INITFN_RESULT_TYPE(ConnectHandler, + void (asio::error_code)) + async_connect(const endpoint_type& peer_endpoint, + ASIO_MOVE_ARG(ConnectHandler) handler) + { + // If you get an error on the following line it means that your handler does + // not meet the documented type requirements for a ConnectHandler. + ASIO_CONNECT_HANDLER_CHECK(ConnectHandler, handler) type_check; + + if (!is_open()) + { + asio::error_code ec; + const protocol_type protocol = peer_endpoint.protocol(); + this->get_service().open(this->get_implementation(), protocol, ec); + if (ec) + { + async_completion<ConnectHandler, + void (asio::error_code)> init(handler); + + asio::post(this->get_executor(), + asio::detail::bind_handler( + ASIO_MOVE_CAST(ASIO_HANDLER_TYPE( + ConnectHandler, void (asio::error_code)))( + init.completion_handler), ec)); + + return init.result.get(); + } + } + +#if defined(ASIO_ENABLE_OLD_SERVICES) + return this->get_service().async_connect(this->get_implementation(), + peer_endpoint, ASIO_MOVE_CAST(ConnectHandler)(handler)); +#else // defined(ASIO_ENABLE_OLD_SERVICES) + async_completion<ConnectHandler, + void (asio::error_code)> init(handler); + + this->get_service().async_connect( + this->get_implementation(), peer_endpoint, init.completion_handler); + + return init.result.get(); +#endif // defined(ASIO_ENABLE_OLD_SERVICES) + } + + /// Set an option on the socket. + /** + * This function is used to set an option on the socket. + * + * @param option The new option value to be set on the socket. + * + * @throws asio::system_error Thrown on failure. + * + * @sa SettableSocketOption @n + * asio::socket_base::broadcast @n + * asio::socket_base::do_not_route @n + * asio::socket_base::keep_alive @n + * asio::socket_base::linger @n + * asio::socket_base::receive_buffer_size @n + * asio::socket_base::receive_low_watermark @n + * asio::socket_base::reuse_address @n + * asio::socket_base::send_buffer_size @n + * asio::socket_base::send_low_watermark @n + * asio::ip::multicast::join_group @n + * asio::ip::multicast::leave_group @n + * asio::ip::multicast::enable_loopback @n + * asio::ip::multicast::outbound_interface @n + * asio::ip::multicast::hops @n + * asio::ip::tcp::no_delay + * + * @par Example + * Setting the IPPROTO_TCP/TCP_NODELAY option: + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::ip::tcp::no_delay option(true); + * socket.set_option(option); + * @endcode + */ + template <typename SettableSocketOption> + void set_option(const SettableSocketOption& option) + { + asio::error_code ec; + this->get_service().set_option(this->get_implementation(), option, ec); + asio::detail::throw_error(ec, "set_option"); + } + + /// Set an option on the socket. + /** + * This function is used to set an option on the socket. + * + * @param option The new option value to be set on the socket. + * + * @param ec Set to indicate what error occurred, if any. + * + * @sa SettableSocketOption @n + * asio::socket_base::broadcast @n + * asio::socket_base::do_not_route @n + * asio::socket_base::keep_alive @n + * asio::socket_base::linger @n + * asio::socket_base::receive_buffer_size @n + * asio::socket_base::receive_low_watermark @n + * asio::socket_base::reuse_address @n + * asio::socket_base::send_buffer_size @n + * asio::socket_base::send_low_watermark @n + * asio::ip::multicast::join_group @n + * asio::ip::multicast::leave_group @n + * asio::ip::multicast::enable_loopback @n + * asio::ip::multicast::outbound_interface @n + * asio::ip::multicast::hops @n + * asio::ip::tcp::no_delay + * + * @par Example + * Setting the IPPROTO_TCP/TCP_NODELAY option: + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::ip::tcp::no_delay option(true); + * asio::error_code ec; + * socket.set_option(option, ec); + * if (ec) + * { + * // An error occurred. + * } + * @endcode + */ + template <typename SettableSocketOption> + ASIO_SYNC_OP_VOID set_option(const SettableSocketOption& option, + asio::error_code& ec) + { + this->get_service().set_option(this->get_implementation(), option, ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Get an option from the socket. + /** + * This function is used to get the current value of an option on the socket. + * + * @param option The option value to be obtained from the socket. + * + * @throws asio::system_error Thrown on failure. + * + * @sa GettableSocketOption @n + * asio::socket_base::broadcast @n + * asio::socket_base::do_not_route @n + * asio::socket_base::keep_alive @n + * asio::socket_base::linger @n + * asio::socket_base::receive_buffer_size @n + * asio::socket_base::receive_low_watermark @n + * asio::socket_base::reuse_address @n + * asio::socket_base::send_buffer_size @n + * asio::socket_base::send_low_watermark @n + * asio::ip::multicast::join_group @n + * asio::ip::multicast::leave_group @n + * asio::ip::multicast::enable_loopback @n + * asio::ip::multicast::outbound_interface @n + * asio::ip::multicast::hops @n + * asio::ip::tcp::no_delay + * + * @par Example + * Getting the value of the SOL_SOCKET/SO_KEEPALIVE option: + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::ip::tcp::socket::keep_alive option; + * socket.get_option(option); + * bool is_set = option.value(); + * @endcode + */ + template <typename GettableSocketOption> + void get_option(GettableSocketOption& option) const + { + asio::error_code ec; + this->get_service().get_option(this->get_implementation(), option, ec); + asio::detail::throw_error(ec, "get_option"); + } + + /// Get an option from the socket. + /** + * This function is used to get the current value of an option on the socket. + * + * @param option The option value to be obtained from the socket. + * + * @param ec Set to indicate what error occurred, if any. + * + * @sa GettableSocketOption @n + * asio::socket_base::broadcast @n + * asio::socket_base::do_not_route @n + * asio::socket_base::keep_alive @n + * asio::socket_base::linger @n + * asio::socket_base::receive_buffer_size @n + * asio::socket_base::receive_low_watermark @n + * asio::socket_base::reuse_address @n + * asio::socket_base::send_buffer_size @n + * asio::socket_base::send_low_watermark @n + * asio::ip::multicast::join_group @n + * asio::ip::multicast::leave_group @n + * asio::ip::multicast::enable_loopback @n + * asio::ip::multicast::outbound_interface @n + * asio::ip::multicast::hops @n + * asio::ip::tcp::no_delay + * + * @par Example + * Getting the value of the SOL_SOCKET/SO_KEEPALIVE option: + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::ip::tcp::socket::keep_alive option; + * asio::error_code ec; + * socket.get_option(option, ec); + * if (ec) + * { + * // An error occurred. + * } + * bool is_set = option.value(); + * @endcode + */ + template <typename GettableSocketOption> + ASIO_SYNC_OP_VOID get_option(GettableSocketOption& option, + asio::error_code& ec) const + { + this->get_service().get_option(this->get_implementation(), option, ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Perform an IO control command on the socket. + /** + * This function is used to execute an IO control command on the socket. + * + * @param command The IO control command to be performed on the socket. + * + * @throws asio::system_error Thrown on failure. + * + * @sa IoControlCommand @n + * asio::socket_base::bytes_readable @n + * asio::socket_base::non_blocking_io + * + * @par Example + * Getting the number of bytes ready to read: + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::ip::tcp::socket::bytes_readable command; + * socket.io_control(command); + * std::size_t bytes_readable = command.get(); + * @endcode + */ + template <typename IoControlCommand> + void io_control(IoControlCommand& command) + { + asio::error_code ec; + this->get_service().io_control(this->get_implementation(), command, ec); + asio::detail::throw_error(ec, "io_control"); + } + + /// Perform an IO control command on the socket. + /** + * This function is used to execute an IO control command on the socket. + * + * @param command The IO control command to be performed on the socket. + * + * @param ec Set to indicate what error occurred, if any. + * + * @sa IoControlCommand @n + * asio::socket_base::bytes_readable @n + * asio::socket_base::non_blocking_io + * + * @par Example + * Getting the number of bytes ready to read: + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::ip::tcp::socket::bytes_readable command; + * asio::error_code ec; + * socket.io_control(command, ec); + * if (ec) + * { + * // An error occurred. + * } + * std::size_t bytes_readable = command.get(); + * @endcode + */ + template <typename IoControlCommand> + ASIO_SYNC_OP_VOID io_control(IoControlCommand& command, + asio::error_code& ec) + { + this->get_service().io_control(this->get_implementation(), command, ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Gets the non-blocking mode of the socket. + /** + * @returns @c true if the socket's synchronous operations will fail with + * asio::error::would_block if they are unable to perform the requested + * operation immediately. If @c false, synchronous operations will block + * until complete. + * + * @note The non-blocking mode has no effect on the behaviour of asynchronous + * operations. Asynchronous operations will never fail with the error + * asio::error::would_block. + */ + bool non_blocking() const + { + return this->get_service().non_blocking(this->get_implementation()); + } + + /// Sets the non-blocking mode of the socket. + /** + * @param mode If @c true, the socket's synchronous operations will fail with + * asio::error::would_block if they are unable to perform the requested + * operation immediately. If @c false, synchronous operations will block + * until complete. + * + * @throws asio::system_error Thrown on failure. + * + * @note The non-blocking mode has no effect on the behaviour of asynchronous + * operations. Asynchronous operations will never fail with the error + * asio::error::would_block. + */ + void non_blocking(bool mode) + { + asio::error_code ec; + this->get_service().non_blocking(this->get_implementation(), mode, ec); + asio::detail::throw_error(ec, "non_blocking"); + } + + /// Sets the non-blocking mode of the socket. + /** + * @param mode If @c true, the socket's synchronous operations will fail with + * asio::error::would_block if they are unable to perform the requested + * operation immediately. If @c false, synchronous operations will block + * until complete. + * + * @param ec Set to indicate what error occurred, if any. + * + * @note The non-blocking mode has no effect on the behaviour of asynchronous + * operations. Asynchronous operations will never fail with the error + * asio::error::would_block. + */ + ASIO_SYNC_OP_VOID non_blocking( + bool mode, asio::error_code& ec) + { + this->get_service().non_blocking(this->get_implementation(), mode, ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Gets the non-blocking mode of the native socket implementation. + /** + * This function is used to retrieve the non-blocking mode of the underlying + * native socket. This mode has no effect on the behaviour of the socket + * object's synchronous operations. + * + * @returns @c true if the underlying socket is in non-blocking mode and + * direct system calls may fail with asio::error::would_block (or the + * equivalent system error). + * + * @note The current non-blocking mode is cached by the socket object. + * Consequently, the return value may be incorrect if the non-blocking mode + * was set directly on the native socket. + * + * @par Example + * This function is intended to allow the encapsulation of arbitrary + * non-blocking system calls as asynchronous operations, in a way that is + * transparent to the user of the socket object. The following example + * illustrates how Linux's @c sendfile system call might be encapsulated: + * @code template <typename Handler> + * struct sendfile_op + * { + * tcp::socket& sock_; + * int fd_; + * Handler handler_; + * off_t offset_; + * std::size_t total_bytes_transferred_; + * + * // Function call operator meeting WriteHandler requirements. + * // Used as the handler for the async_write_some operation. + * void operator()(asio::error_code ec, std::size_t) + * { + * // Put the underlying socket into non-blocking mode. + * if (!ec) + * if (!sock_.native_non_blocking()) + * sock_.native_non_blocking(true, ec); + * + * if (!ec) + * { + * for (;;) + * { + * // Try the system call. + * errno = 0; + * int n = ::sendfile(sock_.native_handle(), fd_, &offset_, 65536); + * ec = asio::error_code(n < 0 ? errno : 0, + * asio::error::get_system_category()); + * total_bytes_transferred_ += ec ? 0 : n; + * + * // Retry operation immediately if interrupted by signal. + * if (ec == asio::error::interrupted) + * continue; + * + * // Check if we need to run the operation again. + * if (ec == asio::error::would_block + * || ec == asio::error::try_again) + * { + * // We have to wait for the socket to become ready again. + * sock_.async_wait(tcp::socket::wait_write, *this); + * return; + * } + * + * if (ec || n == 0) + * { + * // An error occurred, or we have reached the end of the file. + * // Either way we must exit the loop so we can call the handler. + * break; + * } + * + * // Loop around to try calling sendfile again. + * } + * } + * + * // Pass result back to user's handler. + * handler_(ec, total_bytes_transferred_); + * } + * }; + * + * template <typename Handler> + * void async_sendfile(tcp::socket& sock, int fd, Handler h) + * { + * sendfile_op<Handler> op = { sock, fd, h, 0, 0 }; + * sock.async_wait(tcp::socket::wait_write, op); + * } @endcode + */ + bool native_non_blocking() const + { + return this->get_service().native_non_blocking(this->get_implementation()); + } + + /// Sets the non-blocking mode of the native socket implementation. + /** + * This function is used to modify the non-blocking mode of the underlying + * native socket. It has no effect on the behaviour of the socket object's + * synchronous operations. + * + * @param mode If @c true, the underlying socket is put into non-blocking + * mode and direct system calls may fail with asio::error::would_block + * (or the equivalent system error). + * + * @throws asio::system_error Thrown on failure. If the @c mode is + * @c false, but the current value of @c non_blocking() is @c true, this + * function fails with asio::error::invalid_argument, as the + * combination does not make sense. + * + * @par Example + * This function is intended to allow the encapsulation of arbitrary + * non-blocking system calls as asynchronous operations, in a way that is + * transparent to the user of the socket object. The following example + * illustrates how Linux's @c sendfile system call might be encapsulated: + * @code template <typename Handler> + * struct sendfile_op + * { + * tcp::socket& sock_; + * int fd_; + * Handler handler_; + * off_t offset_; + * std::size_t total_bytes_transferred_; + * + * // Function call operator meeting WriteHandler requirements. + * // Used as the handler for the async_write_some operation. + * void operator()(asio::error_code ec, std::size_t) + * { + * // Put the underlying socket into non-blocking mode. + * if (!ec) + * if (!sock_.native_non_blocking()) + * sock_.native_non_blocking(true, ec); + * + * if (!ec) + * { + * for (;;) + * { + * // Try the system call. + * errno = 0; + * int n = ::sendfile(sock_.native_handle(), fd_, &offset_, 65536); + * ec = asio::error_code(n < 0 ? errno : 0, + * asio::error::get_system_category()); + * total_bytes_transferred_ += ec ? 0 : n; + * + * // Retry operation immediately if interrupted by signal. + * if (ec == asio::error::interrupted) + * continue; + * + * // Check if we need to run the operation again. + * if (ec == asio::error::would_block + * || ec == asio::error::try_again) + * { + * // We have to wait for the socket to become ready again. + * sock_.async_wait(tcp::socket::wait_write, *this); + * return; + * } + * + * if (ec || n == 0) + * { + * // An error occurred, or we have reached the end of the file. + * // Either way we must exit the loop so we can call the handler. + * break; + * } + * + * // Loop around to try calling sendfile again. + * } + * } + * + * // Pass result back to user's handler. + * handler_(ec, total_bytes_transferred_); + * } + * }; + * + * template <typename Handler> + * void async_sendfile(tcp::socket& sock, int fd, Handler h) + * { + * sendfile_op<Handler> op = { sock, fd, h, 0, 0 }; + * sock.async_wait(tcp::socket::wait_write, op); + * } @endcode + */ + void native_non_blocking(bool mode) + { + asio::error_code ec; + this->get_service().native_non_blocking( + this->get_implementation(), mode, ec); + asio::detail::throw_error(ec, "native_non_blocking"); + } + + /// Sets the non-blocking mode of the native socket implementation. + /** + * This function is used to modify the non-blocking mode of the underlying + * native socket. It has no effect on the behaviour of the socket object's + * synchronous operations. + * + * @param mode If @c true, the underlying socket is put into non-blocking + * mode and direct system calls may fail with asio::error::would_block + * (or the equivalent system error). + * + * @param ec Set to indicate what error occurred, if any. If the @c mode is + * @c false, but the current value of @c non_blocking() is @c true, this + * function fails with asio::error::invalid_argument, as the + * combination does not make sense. + * + * @par Example + * This function is intended to allow the encapsulation of arbitrary + * non-blocking system calls as asynchronous operations, in a way that is + * transparent to the user of the socket object. The following example + * illustrates how Linux's @c sendfile system call might be encapsulated: + * @code template <typename Handler> + * struct sendfile_op + * { + * tcp::socket& sock_; + * int fd_; + * Handler handler_; + * off_t offset_; + * std::size_t total_bytes_transferred_; + * + * // Function call operator meeting WriteHandler requirements. + * // Used as the handler for the async_write_some operation. + * void operator()(asio::error_code ec, std::size_t) + * { + * // Put the underlying socket into non-blocking mode. + * if (!ec) + * if (!sock_.native_non_blocking()) + * sock_.native_non_blocking(true, ec); + * + * if (!ec) + * { + * for (;;) + * { + * // Try the system call. + * errno = 0; + * int n = ::sendfile(sock_.native_handle(), fd_, &offset_, 65536); + * ec = asio::error_code(n < 0 ? errno : 0, + * asio::error::get_system_category()); + * total_bytes_transferred_ += ec ? 0 : n; + * + * // Retry operation immediately if interrupted by signal. + * if (ec == asio::error::interrupted) + * continue; + * + * // Check if we need to run the operation again. + * if (ec == asio::error::would_block + * || ec == asio::error::try_again) + * { + * // We have to wait for the socket to become ready again. + * sock_.async_wait(tcp::socket::wait_write, *this); + * return; + * } + * + * if (ec || n == 0) + * { + * // An error occurred, or we have reached the end of the file. + * // Either way we must exit the loop so we can call the handler. + * break; + * } + * + * // Loop around to try calling sendfile again. + * } + * } + * + * // Pass result back to user's handler. + * handler_(ec, total_bytes_transferred_); + * } + * }; + * + * template <typename Handler> + * void async_sendfile(tcp::socket& sock, int fd, Handler h) + * { + * sendfile_op<Handler> op = { sock, fd, h, 0, 0 }; + * sock.async_wait(tcp::socket::wait_write, op); + * } @endcode + */ + ASIO_SYNC_OP_VOID native_non_blocking( + bool mode, asio::error_code& ec) + { + this->get_service().native_non_blocking( + this->get_implementation(), mode, ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Get the local endpoint of the socket. + /** + * This function is used to obtain the locally bound endpoint of the socket. + * + * @returns An object that represents the local endpoint of the socket. + * + * @throws asio::system_error Thrown on failure. + * + * @par Example + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::ip::tcp::endpoint endpoint = socket.local_endpoint(); + * @endcode + */ + endpoint_type local_endpoint() const + { + asio::error_code ec; + endpoint_type ep = this->get_service().local_endpoint( + this->get_implementation(), ec); + asio::detail::throw_error(ec, "local_endpoint"); + return ep; + } + + /// Get the local endpoint of the socket. + /** + * This function is used to obtain the locally bound endpoint of the socket. + * + * @param ec Set to indicate what error occurred, if any. + * + * @returns An object that represents the local endpoint of the socket. + * Returns a default-constructed endpoint object if an error occurred. + * + * @par Example + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::error_code ec; + * asio::ip::tcp::endpoint endpoint = socket.local_endpoint(ec); + * if (ec) + * { + * // An error occurred. + * } + * @endcode + */ + endpoint_type local_endpoint(asio::error_code& ec) const + { + return this->get_service().local_endpoint(this->get_implementation(), ec); + } + + /// Get the remote endpoint of the socket. + /** + * This function is used to obtain the remote endpoint of the socket. + * + * @returns An object that represents the remote endpoint of the socket. + * + * @throws asio::system_error Thrown on failure. + * + * @par Example + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::ip::tcp::endpoint endpoint = socket.remote_endpoint(); + * @endcode + */ + endpoint_type remote_endpoint() const + { + asio::error_code ec; + endpoint_type ep = this->get_service().remote_endpoint( + this->get_implementation(), ec); + asio::detail::throw_error(ec, "remote_endpoint"); + return ep; + } + + /// Get the remote endpoint of the socket. + /** + * This function is used to obtain the remote endpoint of the socket. + * + * @param ec Set to indicate what error occurred, if any. + * + * @returns An object that represents the remote endpoint of the socket. + * Returns a default-constructed endpoint object if an error occurred. + * + * @par Example + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::error_code ec; + * asio::ip::tcp::endpoint endpoint = socket.remote_endpoint(ec); + * if (ec) + * { + * // An error occurred. + * } + * @endcode + */ + endpoint_type remote_endpoint(asio::error_code& ec) const + { + return this->get_service().remote_endpoint(this->get_implementation(), ec); + } + + /// Disable sends or receives on the socket. + /** + * This function is used to disable send operations, receive operations, or + * both. + * + * @param what Determines what types of operation will no longer be allowed. + * + * @throws asio::system_error Thrown on failure. + * + * @par Example + * Shutting down the send side of the socket: + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * socket.shutdown(asio::ip::tcp::socket::shutdown_send); + * @endcode + */ + void shutdown(shutdown_type what) + { + asio::error_code ec; + this->get_service().shutdown(this->get_implementation(), what, ec); + asio::detail::throw_error(ec, "shutdown"); + } + + /// Disable sends or receives on the socket. + /** + * This function is used to disable send operations, receive operations, or + * both. + * + * @param what Determines what types of operation will no longer be allowed. + * + * @param ec Set to indicate what error occurred, if any. + * + * @par Example + * Shutting down the send side of the socket: + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::error_code ec; + * socket.shutdown(asio::ip::tcp::socket::shutdown_send, ec); + * if (ec) + * { + * // An error occurred. + * } + * @endcode + */ + ASIO_SYNC_OP_VOID shutdown(shutdown_type what, + asio::error_code& ec) + { + this->get_service().shutdown(this->get_implementation(), what, ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Wait for the socket to become ready to read, ready to write, or to have + /// pending error conditions. + /** + * This function is used to perform a blocking wait for a socket to enter + * a ready to read, write or error condition state. + * + * @param w Specifies the desired socket state. + * + * @par Example + * Waiting for a socket to become readable. + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * socket.wait(asio::ip::tcp::socket::wait_read); + * @endcode + */ + void wait(wait_type w) + { + asio::error_code ec; + this->get_service().wait(this->get_implementation(), w, ec); + asio::detail::throw_error(ec, "wait"); + } + + /// Wait for the socket to become ready to read, ready to write, or to have + /// pending error conditions. + /** + * This function is used to perform a blocking wait for a socket to enter + * a ready to read, write or error condition state. + * + * @param w Specifies the desired socket state. + * + * @param ec Set to indicate what error occurred, if any. + * + * @par Example + * Waiting for a socket to become readable. + * @code + * asio::ip::tcp::socket socket(io_context); + * ... + * asio::error_code ec; + * socket.wait(asio::ip::tcp::socket::wait_read, ec); + * @endcode + */ + ASIO_SYNC_OP_VOID wait(wait_type w, asio::error_code& ec) + { + this->get_service().wait(this->get_implementation(), w, ec); + ASIO_SYNC_OP_VOID_RETURN(ec); + } + + /// Asynchronously wait for the socket to become ready to read, ready to + /// write, or to have pending error conditions. + /** + * This function is used to perform an asynchronous wait for a socket to enter + * a ready to read, write or error condition state. + * + * @param w Specifies the desired socket state. + * + * @param handler The handler to be called when the wait 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 + * ); @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_context::post(). + * + * @par Example + * @code + * void wait_handler(const asio::error_code& error) + * { + * if (!error) + * { + * // Wait succeeded. + * } + * } + * + * ... + * + * asio::ip::tcp::socket socket(io_context); + * ... + * socket.async_wait(asio::ip::tcp::socket::wait_read, wait_handler); + * @endcode + */ + template <typename WaitHandler> + ASIO_INITFN_RESULT_TYPE(WaitHandler, + void (asio::error_code)) + async_wait(wait_type w, ASIO_MOVE_ARG(WaitHandler) handler) + { + // If you get an error on the following line it means that your handler does + // not meet the documented type requirements for a WaitHandler. + ASIO_WAIT_HANDLER_CHECK(WaitHandler, handler) type_check; + +#if defined(ASIO_ENABLE_OLD_SERVICES) + return this->get_service().async_wait(this->get_implementation(), + w, ASIO_MOVE_CAST(WaitHandler)(handler)); +#else // defined(ASIO_ENABLE_OLD_SERVICES) + async_completion<WaitHandler, + void (asio::error_code)> init(handler); + + this->get_service().async_wait(this->get_implementation(), + w, init.completion_handler); + + return init.result.get(); +#endif // defined(ASIO_ENABLE_OLD_SERVICES) + } + +protected: + /// Protected destructor to prevent deletion through this type. + /** + * This function destroys the socket, cancelling any outstanding asynchronous + * operations associated with the socket as if by calling @c cancel. + */ + ~basic_socket() + { + } + +private: + // Disallow copying and assignment. + basic_socket(const basic_socket&) ASIO_DELETED; + basic_socket& operator=(const basic_socket&) ASIO_DELETED; +}; + +} // namespace asio + +#include "asio/detail/pop_options.hpp" + +#if !defined(ASIO_ENABLE_OLD_SERVICES) +# undef ASIO_SVC_T +#endif // !defined(ASIO_ENABLE_OLD_SERVICES) + +#endif // ASIO_BASIC_SOCKET_HPP |