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Diffstat (limited to 'lib/asio/posix/descriptor.hpp')
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diff --git a/lib/asio/posix/descriptor.hpp b/lib/asio/posix/descriptor.hpp deleted file mode 100644 index d0cee1a..0000000 --- a/lib/asio/posix/descriptor.hpp +++ /dev/null @@ -1,644 +0,0 @@ -// -// posix/descriptor.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_POSIX_DESCRIPTOR_HPP -#define ASIO_POSIX_DESCRIPTOR_HPP - -#if defined(_MSC_VER) && (_MSC_VER >= 1200) -# pragma once -#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) - -#include "asio/detail/config.hpp" - -#if !defined(ASIO_ENABLE_OLD_SERVICES) - -#if defined(ASIO_HAS_POSIX_STREAM_DESCRIPTOR) \ - || defined(GENERATING_DOCUMENTATION) - -#include "asio/async_result.hpp" -#include "asio/basic_io_object.hpp" -#include "asio/detail/handler_type_requirements.hpp" -#include "asio/detail/reactive_descriptor_service.hpp" -#include "asio/detail/throw_error.hpp" -#include "asio/error.hpp" -#include "asio/io_context.hpp" -#include "asio/posix/descriptor_base.hpp" - -#if defined(ASIO_HAS_MOVE) -# include <utility> -#endif // defined(ASIO_HAS_MOVE) - -#define ASIO_SVC_T asio::detail::reactive_descriptor_service - -#include "asio/detail/push_options.hpp" - -namespace asio { -namespace posix { - -/// Provides POSIX descriptor functionality. -/** - * The posix::descriptor class template provides the ability to wrap a - * POSIX descriptor. - * - * @par Thread Safety - * @e Distinct @e objects: Safe.@n - * @e Shared @e objects: Unsafe. - */ -class descriptor - : ASIO_SVC_ACCESS basic_io_object<ASIO_SVC_T>, - public descriptor_base -{ -public: - /// The type of the executor associated with the object. - typedef io_context::executor_type executor_type; - - /// The native representation of a descriptor. -#if defined(GENERATING_DOCUMENTATION) - typedef implementation_defined native_handle_type; -#else - typedef ASIO_SVC_T::native_handle_type native_handle_type; -#endif - - /// A descriptor is always the lowest layer. - typedef descriptor lowest_layer_type; - - /// Construct a descriptor without opening it. - /** - * This constructor creates a descriptor without opening it. - * - * @param io_context The io_context object that the descriptor will use to - * dispatch handlers for any asynchronous operations performed on the - * descriptor. - */ - explicit descriptor(asio::io_context& io_context) - : basic_io_object<ASIO_SVC_T>(io_context) - { - } - - /// Construct a descriptor on an existing native descriptor. - /** - * This constructor creates a descriptor object to hold an existing native - * descriptor. - * - * @param io_context The io_context object that the descriptor will use to - * dispatch handlers for any asynchronous operations performed on the - * descriptor. - * - * @param native_descriptor A native descriptor. - * - * @throws asio::system_error Thrown on failure. - */ - descriptor(asio::io_context& io_context, - const native_handle_type& native_descriptor) - : basic_io_object<ASIO_SVC_T>(io_context) - { - asio::error_code ec; - this->get_service().assign(this->get_implementation(), - native_descriptor, ec); - asio::detail::throw_error(ec, "assign"); - } - -#if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION) - /// Move-construct a descriptor from another. - /** - * This constructor moves a descriptor from one object to another. - * - * @param other The other descriptor 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 descriptor(io_context&) constructor. - */ - descriptor(descriptor&& other) - : basic_io_object<ASIO_SVC_T>(std::move(other)) - { - } - - /// Move-assign a descriptor from another. - /** - * This assignment operator moves a descriptor from one object to another. - * - * @param other The other descriptor 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 descriptor(io_context&) constructor. - */ - descriptor& operator=(descriptor&& other) - { - basic_io_object<ASIO_SVC_T>::operator=(std::move(other)); - return *this; - } -#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION) - -#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(); - } - - /// Get a reference to the lowest layer. - /** - * This function returns a reference to the lowest layer in a stack of - * layers. Since a descriptor 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 descriptor 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; - } - - /// Assign an existing native descriptor to the descriptor. - /* - * This function opens the descriptor to hold an existing native descriptor. - * - * @param native_descriptor A native descriptor. - * - * @throws asio::system_error Thrown on failure. - */ - void assign(const native_handle_type& native_descriptor) - { - asio::error_code ec; - this->get_service().assign(this->get_implementation(), - native_descriptor, ec); - asio::detail::throw_error(ec, "assign"); - } - - /// Assign an existing native descriptor to the descriptor. - /* - * This function opens the descriptor to hold an existing native descriptor. - * - * @param native_descriptor A native descriptor. - * - * @param ec Set to indicate what error occurred, if any. - */ - ASIO_SYNC_OP_VOID assign(const native_handle_type& native_descriptor, - asio::error_code& ec) - { - this->get_service().assign( - this->get_implementation(), native_descriptor, ec); - ASIO_SYNC_OP_VOID_RETURN(ec); - } - - /// Determine whether the descriptor is open. - bool is_open() const - { - return this->get_service().is_open(this->get_implementation()); - } - - /// Close the descriptor. - /** - * This function is used to close the descriptor. Any asynchronous read or - * write 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. - */ - void close() - { - asio::error_code ec; - this->get_service().close(this->get_implementation(), ec); - asio::detail::throw_error(ec, "close"); - } - - /// Close the descriptor. - /** - * This function is used to close the descriptor. Any asynchronous read or - * write 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. - */ - ASIO_SYNC_OP_VOID close(asio::error_code& ec) - { - this->get_service().close(this->get_implementation(), ec); - ASIO_SYNC_OP_VOID_RETURN(ec); - } - - /// Get the native descriptor representation. - /** - * This function may be used to obtain the underlying representation of the - * descriptor. This is intended to allow access to native descriptor - * functionality that is not otherwise provided. - */ - native_handle_type native_handle() - { - return this->get_service().native_handle(this->get_implementation()); - } - - /// Release ownership of the native descriptor implementation. - /** - * This function may be used to obtain the underlying representation of the - * descriptor. After calling this function, @c is_open() returns false. The - * caller is responsible for closing the descriptor. - * - * All outstanding asynchronous read or write operations will finish - * immediately, and the handlers for cancelled operations will be passed the - * asio::error::operation_aborted error. - */ - native_handle_type release() - { - return this->get_service().release(this->get_implementation()); - } - - /// Cancel all asynchronous operations associated with the descriptor. - /** - * This function causes all outstanding asynchronous read or write 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. - */ - 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 descriptor. - /** - * This function causes all outstanding asynchronous read or write 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. - */ - ASIO_SYNC_OP_VOID cancel(asio::error_code& ec) - { - this->get_service().cancel(this->get_implementation(), ec); - ASIO_SYNC_OP_VOID_RETURN(ec); - } - - /// Perform an IO control command on the descriptor. - /** - * This function is used to execute an IO control command on the descriptor. - * - * @param command The IO control command to be performed on the descriptor. - * - * @throws asio::system_error Thrown on failure. - * - * @sa IoControlCommand @n - * asio::posix::descriptor_base::bytes_readable @n - * asio::posix::descriptor_base::non_blocking_io - * - * @par Example - * Getting the number of bytes ready to read: - * @code - * asio::posix::stream_descriptor descriptor(io_context); - * ... - * asio::posix::stream_descriptor::bytes_readable command; - * descriptor.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 descriptor. - /** - * This function is used to execute an IO control command on the descriptor. - * - * @param command The IO control command to be performed on the descriptor. - * - * @param ec Set to indicate what error occurred, if any. - * - * @sa IoControlCommand @n - * asio::posix::descriptor_base::bytes_readable @n - * asio::posix::descriptor_base::non_blocking_io - * - * @par Example - * Getting the number of bytes ready to read: - * @code - * asio::posix::stream_descriptor descriptor(io_context); - * ... - * asio::posix::stream_descriptor::bytes_readable command; - * asio::error_code ec; - * descriptor.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 descriptor. - /** - * @returns @c true if the descriptor'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 descriptor. - /** - * @param mode If @c true, the descriptor'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 descriptor. - /** - * @param mode If @c true, the descriptor'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 descriptor implementation. - /** - * This function is used to retrieve the non-blocking mode of the underlying - * native descriptor. This mode has no effect on the behaviour of the - * descriptor object's synchronous operations. - * - * @returns @c true if the underlying descriptor 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 descriptor object. - * Consequently, the return value may be incorrect if the non-blocking mode - * was set directly on the native descriptor. - */ - bool native_non_blocking() const - { - return this->get_service().native_non_blocking( - this->get_implementation()); - } - - /// Sets the non-blocking mode of the native descriptor implementation. - /** - * This function is used to modify the non-blocking mode of the underlying - * native descriptor. It has no effect on the behaviour of the descriptor - * object's synchronous operations. - * - * @param mode If @c true, the underlying descriptor 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. - */ - 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 descriptor implementation. - /** - * This function is used to modify the non-blocking mode of the underlying - * native descriptor. It has no effect on the behaviour of the descriptor - * object's synchronous operations. - * - * @param mode If @c true, the underlying descriptor 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. - */ - 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); - } - - /// Wait for the descriptor 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 descriptor to enter - * a ready to read, write or error condition state. - * - * @param w Specifies the desired descriptor state. - * - * @par Example - * Waiting for a descriptor to become readable. - * @code - * asio::posix::stream_descriptor descriptor(io_context); - * ... - * descriptor.wait(asio::posix::stream_descriptor::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 descriptor 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 descriptor to enter - * a ready to read, write or error condition state. - * - * @param w Specifies the desired descriptor state. - * - * @param ec Set to indicate what error occurred, if any. - * - * @par Example - * Waiting for a descriptor to become readable. - * @code - * asio::posix::stream_descriptor descriptor(io_context); - * ... - * asio::error_code ec; - * descriptor.wait(asio::posix::stream_descriptor::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 descriptor 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 descriptor to - * enter a ready to read, write or error condition state. - * - * @param w Specifies the desired descriptor 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::posix::stream_descriptor descriptor(io_context); - * ... - * descriptor.async_wait( - * asio::posix::stream_descriptor::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; - - 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(); - } - -protected: - /// Protected destructor to prevent deletion through this type. - /** - * This function destroys the descriptor, cancelling any outstanding - * asynchronous wait operations associated with the descriptor as if by - * calling @c cancel. - */ - ~descriptor() - { - } -}; - -} // namespace posix -} // namespace asio - -#include "asio/detail/pop_options.hpp" - -#undef ASIO_SVC_T - -#endif // defined(ASIO_HAS_POSIX_STREAM_DESCRIPTOR) - // || defined(GENERATING_DOCUMENTATION) - -#endif // !defined(ASIO_ENABLE_OLD_SERVICES) - -#endif // ASIO_POSIX_DESCRIPTOR_HPP |