664 lines
22 KiB
C++
664 lines
22 KiB
C++
//
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// detail/io_uring_socket_service_base.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_DETAIL_IO_URING_SOCKET_SERVICE_BASE_HPP
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#define ASIO_DETAIL_IO_URING_SOCKET_SERVICE_BASE_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#if defined(ASIO_HAS_IO_URING)
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#include "asio/associated_cancellation_slot.hpp"
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#include "asio/buffer.hpp"
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#include "asio/cancellation_type.hpp"
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#include "asio/error.hpp"
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#include "asio/execution_context.hpp"
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#include "asio/socket_base.hpp"
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#include "asio/detail/buffer_sequence_adapter.hpp"
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#include "asio/detail/memory.hpp"
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#include "asio/detail/io_uring_null_buffers_op.hpp"
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#include "asio/detail/io_uring_service.hpp"
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#include "asio/detail/io_uring_socket_recv_op.hpp"
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#include "asio/detail/io_uring_socket_recvmsg_op.hpp"
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#include "asio/detail/io_uring_socket_send_op.hpp"
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#include "asio/detail/io_uring_wait_op.hpp"
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#include "asio/detail/socket_holder.hpp"
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#include "asio/detail/socket_ops.hpp"
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#include "asio/detail/socket_types.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace detail {
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class io_uring_socket_service_base
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{
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public:
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// The native type of a socket.
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typedef socket_type native_handle_type;
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// The implementation type of the socket.
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struct base_implementation_type
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{
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// The native socket representation.
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socket_type socket_;
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// The current state of the socket.
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socket_ops::state_type state_;
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// Per I/O object data used by the io_uring_service.
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io_uring_service::per_io_object_data io_object_data_;
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};
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// Constructor.
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ASIO_DECL io_uring_socket_service_base(execution_context& context);
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// Destroy all user-defined handler objects owned by the service.
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ASIO_DECL void base_shutdown();
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// Construct a new socket implementation.
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ASIO_DECL void construct(base_implementation_type& impl);
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// Move-construct a new socket implementation.
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ASIO_DECL void base_move_construct(base_implementation_type& impl,
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base_implementation_type& other_impl) ASIO_NOEXCEPT;
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// Move-assign from another socket implementation.
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ASIO_DECL void base_move_assign(base_implementation_type& impl,
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io_uring_socket_service_base& other_service,
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base_implementation_type& other_impl);
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// Destroy a socket implementation.
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ASIO_DECL void destroy(base_implementation_type& impl);
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// Determine whether the socket is open.
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bool is_open(const base_implementation_type& impl) const
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{
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return impl.socket_ != invalid_socket;
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}
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// Destroy a socket implementation.
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ASIO_DECL asio::error_code close(
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base_implementation_type& impl, asio::error_code& ec);
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// Release ownership of the socket.
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ASIO_DECL socket_type release(
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base_implementation_type& impl, asio::error_code& ec);
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// Get the native socket representation.
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native_handle_type native_handle(base_implementation_type& impl)
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{
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return impl.socket_;
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}
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// Cancel all operations associated with the socket.
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ASIO_DECL asio::error_code cancel(
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base_implementation_type& impl, asio::error_code& ec);
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// Determine whether the socket is at the out-of-band data mark.
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bool at_mark(const base_implementation_type& impl,
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asio::error_code& ec) const
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{
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return socket_ops::sockatmark(impl.socket_, ec);
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}
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// Determine the number of bytes available for reading.
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std::size_t available(const base_implementation_type& impl,
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asio::error_code& ec) const
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{
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return socket_ops::available(impl.socket_, ec);
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}
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// Place the socket into the state where it will listen for new connections.
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asio::error_code listen(base_implementation_type& impl,
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int backlog, asio::error_code& ec)
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{
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socket_ops::listen(impl.socket_, backlog, ec);
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return ec;
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}
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// Perform an IO control command on the socket.
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template <typename IO_Control_Command>
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asio::error_code io_control(base_implementation_type& impl,
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IO_Control_Command& command, asio::error_code& ec)
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{
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socket_ops::ioctl(impl.socket_, impl.state_, command.name(),
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static_cast<ioctl_arg_type*>(command.data()), ec);
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return ec;
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}
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// Gets the non-blocking mode of the socket.
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bool non_blocking(const base_implementation_type& impl) const
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{
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return (impl.state_ & socket_ops::user_set_non_blocking) != 0;
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}
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// Sets the non-blocking mode of the socket.
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asio::error_code non_blocking(base_implementation_type& impl,
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bool mode, asio::error_code& ec)
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{
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socket_ops::set_user_non_blocking(impl.socket_, impl.state_, mode, ec);
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return ec;
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}
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// Gets the non-blocking mode of the native socket implementation.
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bool native_non_blocking(const base_implementation_type& impl) const
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{
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return (impl.state_ & socket_ops::internal_non_blocking) != 0;
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}
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// Sets the non-blocking mode of the native socket implementation.
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asio::error_code native_non_blocking(base_implementation_type& impl,
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bool mode, asio::error_code& ec)
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{
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socket_ops::set_internal_non_blocking(impl.socket_, impl.state_, mode, ec);
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return ec;
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}
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// Wait for the socket to become ready to read, ready to write, or to have
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// pending error conditions.
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asio::error_code wait(base_implementation_type& impl,
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socket_base::wait_type w, asio::error_code& ec)
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{
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switch (w)
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{
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case socket_base::wait_read:
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socket_ops::poll_read(impl.socket_, impl.state_, -1, ec);
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break;
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case socket_base::wait_write:
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socket_ops::poll_write(impl.socket_, impl.state_, -1, ec);
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break;
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case socket_base::wait_error:
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socket_ops::poll_error(impl.socket_, impl.state_, -1, ec);
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break;
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default:
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ec = asio::error::invalid_argument;
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break;
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}
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return ec;
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}
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// Asynchronously wait for the socket to become ready to read, ready to
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// write, or to have pending error conditions.
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template <typename Handler, typename IoExecutor>
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void async_wait(base_implementation_type& impl,
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socket_base::wait_type w, Handler& handler, const IoExecutor& io_ex)
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{
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bool is_continuation =
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asio_handler_cont_helpers::is_continuation(handler);
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typename associated_cancellation_slot<Handler>::type slot
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= asio::get_associated_cancellation_slot(handler);
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int op_type;
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int poll_flags;
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switch (w)
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{
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case socket_base::wait_read:
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op_type = io_uring_service::read_op;
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poll_flags = POLLIN;
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break;
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case socket_base::wait_write:
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op_type = io_uring_service::write_op;
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poll_flags = POLLOUT;
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break;
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case socket_base::wait_error:
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op_type = io_uring_service::except_op;
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poll_flags = POLLPRI | POLLERR | POLLHUP;
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break;
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default:
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op_type = -1;
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poll_flags = -1;
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return;
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}
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// Allocate and construct an operation to wrap the handler.
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typedef io_uring_wait_op<Handler, IoExecutor> op;
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typename op::ptr p = { asio::detail::addressof(handler),
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op::ptr::allocate(handler), 0 };
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p.p = new (p.v) op(success_ec_, impl.socket_,
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poll_flags, handler, io_ex);
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ASIO_HANDLER_CREATION((io_uring_service_.context(), *p.p,
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"socket", &impl, impl.socket_, "async_wait"));
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// Optionally register for per-operation cancellation.
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if (slot.is_connected())
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{
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p.p->cancellation_key_ =
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&slot.template emplace<io_uring_op_cancellation>(
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&io_uring_service_, &impl.io_object_data_, op_type);
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}
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start_op(impl, op_type, p.p, is_continuation, op_type == -1);
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p.v = p.p = 0;
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}
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// Send the given data to the peer.
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template <typename ConstBufferSequence>
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size_t send(base_implementation_type& impl,
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const ConstBufferSequence& buffers,
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socket_base::message_flags flags, asio::error_code& ec)
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{
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typedef buffer_sequence_adapter<asio::const_buffer,
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ConstBufferSequence> bufs_type;
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if (bufs_type::is_single_buffer)
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{
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return socket_ops::sync_send1(impl.socket_,
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impl.state_, bufs_type::first(buffers).data(),
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bufs_type::first(buffers).size(), flags, ec);
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}
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else
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{
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bufs_type bufs(buffers);
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return socket_ops::sync_send(impl.socket_, impl.state_,
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bufs.buffers(), bufs.count(), flags, bufs.all_empty(), ec);
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}
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}
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// Wait until data can be sent without blocking.
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size_t send(base_implementation_type& impl, const null_buffers&,
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socket_base::message_flags, asio::error_code& ec)
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{
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// Wait for socket to become ready.
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socket_ops::poll_write(impl.socket_, impl.state_, -1, ec);
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return 0;
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}
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// Start an asynchronous send. The data being sent must be valid for the
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// lifetime of the asynchronous operation.
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template <typename ConstBufferSequence, typename Handler, typename IoExecutor>
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void async_send(base_implementation_type& impl,
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const ConstBufferSequence& buffers, socket_base::message_flags flags,
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Handler& handler, const IoExecutor& io_ex)
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{
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bool is_continuation =
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asio_handler_cont_helpers::is_continuation(handler);
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typename associated_cancellation_slot<Handler>::type slot
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= asio::get_associated_cancellation_slot(handler);
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// Allocate and construct an operation to wrap the handler.
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typedef io_uring_socket_send_op<
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ConstBufferSequence, Handler, IoExecutor> op;
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typename op::ptr p = { asio::detail::addressof(handler),
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op::ptr::allocate(handler), 0 };
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p.p = new (p.v) op(success_ec_, impl.socket_,
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impl.state_, buffers, flags, handler, io_ex);
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// Optionally register for per-operation cancellation.
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if (slot.is_connected())
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{
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p.p->cancellation_key_ =
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&slot.template emplace<io_uring_op_cancellation>(&io_uring_service_,
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&impl.io_object_data_, io_uring_service::write_op);
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}
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ASIO_HANDLER_CREATION((io_uring_service_.context(), *p.p,
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"socket", &impl, impl.socket_, "async_send"));
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start_op(impl, io_uring_service::write_op, p.p, is_continuation,
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((impl.state_ & socket_ops::stream_oriented)
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&& buffer_sequence_adapter<asio::const_buffer,
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ConstBufferSequence>::all_empty(buffers)));
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p.v = p.p = 0;
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}
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// Start an asynchronous wait until data can be sent without blocking.
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template <typename Handler, typename IoExecutor>
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void async_send(base_implementation_type& impl, const null_buffers&,
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socket_base::message_flags, Handler& handler, const IoExecutor& io_ex)
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{
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bool is_continuation =
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asio_handler_cont_helpers::is_continuation(handler);
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typename associated_cancellation_slot<Handler>::type slot
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= asio::get_associated_cancellation_slot(handler);
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// Allocate and construct an operation to wrap the handler.
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typedef io_uring_null_buffers_op<Handler, IoExecutor> op;
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typename op::ptr p = { asio::detail::addressof(handler),
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op::ptr::allocate(handler), 0 };
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p.p = new (p.v) op(success_ec_, impl.socket_, POLLOUT, handler, io_ex);
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// Optionally register for per-operation cancellation.
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if (slot.is_connected())
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{
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p.p->cancellation_key_ =
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&slot.template emplace<io_uring_op_cancellation>(&io_uring_service_,
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&impl.io_object_data_, io_uring_service::write_op);
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}
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ASIO_HANDLER_CREATION((io_uring_service_.context(), *p.p,
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"socket", &impl, impl.socket_, "async_send(null_buffers)"));
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start_op(impl, io_uring_service::write_op, p.p, is_continuation, false);
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p.v = p.p = 0;
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}
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// Receive some data from the peer. Returns the number of bytes received.
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template <typename MutableBufferSequence>
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size_t receive(base_implementation_type& impl,
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const MutableBufferSequence& buffers,
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socket_base::message_flags flags, asio::error_code& ec)
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{
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typedef buffer_sequence_adapter<asio::mutable_buffer,
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MutableBufferSequence> bufs_type;
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if (bufs_type::is_single_buffer)
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{
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return socket_ops::sync_recv1(impl.socket_,
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impl.state_, bufs_type::first(buffers).data(),
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bufs_type::first(buffers).size(), flags, ec);
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}
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else
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{
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bufs_type bufs(buffers);
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return socket_ops::sync_recv(impl.socket_, impl.state_,
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bufs.buffers(), bufs.count(), flags, bufs.all_empty(), ec);
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}
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}
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// Wait until data can be received without blocking.
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size_t receive(base_implementation_type& impl, const null_buffers&,
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socket_base::message_flags, asio::error_code& ec)
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{
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// Wait for socket to become ready.
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socket_ops::poll_read(impl.socket_, impl.state_, -1, ec);
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return 0;
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}
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// Start an asynchronous receive. The buffer for the data being received
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// must be valid for the lifetime of the asynchronous operation.
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template <typename MutableBufferSequence,
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typename Handler, typename IoExecutor>
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void async_receive(base_implementation_type& impl,
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const MutableBufferSequence& buffers, socket_base::message_flags flags,
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Handler& handler, const IoExecutor& io_ex)
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{
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bool is_continuation =
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asio_handler_cont_helpers::is_continuation(handler);
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int op_type = (flags & socket_base::message_out_of_band)
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? io_uring_service::except_op : io_uring_service::read_op;
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typename associated_cancellation_slot<Handler>::type slot
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= asio::get_associated_cancellation_slot(handler);
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// Allocate and construct an operation to wrap the handler.
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typedef io_uring_socket_recv_op<
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MutableBufferSequence, Handler, IoExecutor> op;
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typename op::ptr p = { asio::detail::addressof(handler),
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op::ptr::allocate(handler), 0 };
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p.p = new (p.v) op(success_ec_, impl.socket_,
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impl.state_, buffers, flags, handler, io_ex);
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// Optionally register for per-operation cancellation.
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if (slot.is_connected())
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{
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p.p->cancellation_key_ =
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&slot.template emplace<io_uring_op_cancellation>(
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&io_uring_service_, &impl.io_object_data_, op_type);
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}
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ASIO_HANDLER_CREATION((io_uring_service_.context(), *p.p,
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"socket", &impl, impl.socket_, "async_receive"));
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start_op(impl, op_type, p.p, is_continuation,
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((impl.state_ & socket_ops::stream_oriented)
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&& buffer_sequence_adapter<asio::mutable_buffer,
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MutableBufferSequence>::all_empty(buffers)));
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p.v = p.p = 0;
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}
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// Wait until data can be received without blocking.
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template <typename Handler, typename IoExecutor>
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void async_receive(base_implementation_type& impl,
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const null_buffers&, socket_base::message_flags flags,
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Handler& handler, const IoExecutor& io_ex)
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{
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bool is_continuation =
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asio_handler_cont_helpers::is_continuation(handler);
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int op_type;
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int poll_flags;
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if ((flags & socket_base::message_out_of_band) != 0)
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{
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op_type = io_uring_service::except_op;
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poll_flags = POLLPRI;
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}
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else
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{
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op_type = io_uring_service::read_op;
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poll_flags = POLLIN;
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}
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typename associated_cancellation_slot<Handler>::type slot
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= asio::get_associated_cancellation_slot(handler);
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// Allocate and construct an operation to wrap the handler.
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typedef io_uring_null_buffers_op<Handler, IoExecutor> op;
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typename op::ptr p = { asio::detail::addressof(handler),
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op::ptr::allocate(handler), 0 };
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p.p = new (p.v) op(success_ec_, impl.socket_, poll_flags, handler, io_ex);
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|
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// Optionally register for per-operation cancellation.
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if (slot.is_connected())
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{
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p.p->cancellation_key_ =
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&slot.template emplace<io_uring_op_cancellation>(
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&io_uring_service_, &impl.io_object_data_, op_type);
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}
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ASIO_HANDLER_CREATION((io_uring_service_.context(), *p.p,
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"socket", &impl, impl.socket_, "async_receive(null_buffers)"));
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start_op(impl, op_type, p.p, is_continuation, false);
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p.v = p.p = 0;
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}
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// Receive some data with associated flags. Returns the number of bytes
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// received.
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template <typename MutableBufferSequence>
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size_t receive_with_flags(base_implementation_type& impl,
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const MutableBufferSequence& buffers,
|
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socket_base::message_flags in_flags,
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socket_base::message_flags& out_flags, asio::error_code& ec)
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{
|
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buffer_sequence_adapter<asio::mutable_buffer,
|
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MutableBufferSequence> bufs(buffers);
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|
|
return socket_ops::sync_recvmsg(impl.socket_, impl.state_,
|
|
bufs.buffers(), bufs.count(), in_flags, out_flags, ec);
|
|
}
|
|
|
|
// Wait until data can be received without blocking.
|
|
size_t receive_with_flags(base_implementation_type& impl,
|
|
const null_buffers&, socket_base::message_flags,
|
|
socket_base::message_flags& out_flags, asio::error_code& ec)
|
|
{
|
|
// Wait for socket to become ready.
|
|
socket_ops::poll_read(impl.socket_, impl.state_, -1, ec);
|
|
|
|
// Clear out_flags, since we cannot give it any other sensible value when
|
|
// performing a null_buffers operation.
|
|
out_flags = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Start an asynchronous receive. The buffer for the data being received
|
|
// must be valid for the lifetime of the asynchronous operation.
|
|
template <typename MutableBufferSequence,
|
|
typename Handler, typename IoExecutor>
|
|
void async_receive_with_flags(base_implementation_type& impl,
|
|
const MutableBufferSequence& buffers, socket_base::message_flags in_flags,
|
|
socket_base::message_flags& out_flags, Handler& handler,
|
|
const IoExecutor& io_ex)
|
|
{
|
|
bool is_continuation =
|
|
asio_handler_cont_helpers::is_continuation(handler);
|
|
|
|
int op_type = (in_flags & socket_base::message_out_of_band)
|
|
? io_uring_service::except_op : io_uring_service::read_op;
|
|
|
|
typename associated_cancellation_slot<Handler>::type slot
|
|
= asio::get_associated_cancellation_slot(handler);
|
|
|
|
// Allocate and construct an operation to wrap the handler.
|
|
typedef io_uring_socket_recvmsg_op<
|
|
MutableBufferSequence, Handler, IoExecutor> op;
|
|
typename op::ptr p = { asio::detail::addressof(handler),
|
|
op::ptr::allocate(handler), 0 };
|
|
p.p = new (p.v) op(success_ec_, impl.socket_, impl.state_,
|
|
buffers, in_flags, out_flags, handler, io_ex);
|
|
|
|
// Optionally register for per-operation cancellation.
|
|
if (slot.is_connected())
|
|
{
|
|
p.p->cancellation_key_ =
|
|
&slot.template emplace<io_uring_op_cancellation>(
|
|
&io_uring_service_, &impl.io_object_data_, op_type);
|
|
}
|
|
|
|
ASIO_HANDLER_CREATION((io_uring_service_.context(), *p.p,
|
|
"socket", &impl, impl.socket_, "async_receive_with_flags"));
|
|
|
|
start_op(impl, op_type, p.p, is_continuation, false);
|
|
p.v = p.p = 0;
|
|
}
|
|
|
|
// Wait until data can be received without blocking.
|
|
template <typename Handler, typename IoExecutor>
|
|
void async_receive_with_flags(base_implementation_type& impl,
|
|
const null_buffers&, socket_base::message_flags in_flags,
|
|
socket_base::message_flags& out_flags, Handler& handler,
|
|
const IoExecutor& io_ex)
|
|
{
|
|
bool is_continuation =
|
|
asio_handler_cont_helpers::is_continuation(handler);
|
|
|
|
int op_type;
|
|
int poll_flags;
|
|
if ((in_flags & socket_base::message_out_of_band) != 0)
|
|
{
|
|
op_type = io_uring_service::except_op;
|
|
poll_flags = POLLPRI;
|
|
}
|
|
else
|
|
{
|
|
op_type = io_uring_service::read_op;
|
|
poll_flags = POLLIN;
|
|
}
|
|
|
|
typename associated_cancellation_slot<Handler>::type slot
|
|
= asio::get_associated_cancellation_slot(handler);
|
|
|
|
// Allocate and construct an operation to wrap the handler.
|
|
typedef io_uring_null_buffers_op<Handler, IoExecutor> op;
|
|
typename op::ptr p = { asio::detail::addressof(handler),
|
|
op::ptr::allocate(handler), 0 };
|
|
p.p = new (p.v) op(success_ec_, impl.socket_, poll_flags, handler, io_ex);
|
|
|
|
// Optionally register for per-operation cancellation.
|
|
if (slot.is_connected())
|
|
{
|
|
p.p->cancellation_key_ =
|
|
&slot.template emplace<io_uring_op_cancellation>(
|
|
&io_uring_service_, &impl.io_object_data_, op_type);
|
|
}
|
|
|
|
ASIO_HANDLER_CREATION((io_uring_service_.context(), *p.p, "socket",
|
|
&impl, impl.socket_, "async_receive_with_flags(null_buffers)"));
|
|
|
|
// Clear out_flags, since we cannot give it any other sensible value when
|
|
// performing a null_buffers operation.
|
|
out_flags = 0;
|
|
|
|
start_op(impl, op_type, p.p, is_continuation, false);
|
|
p.v = p.p = 0;
|
|
}
|
|
|
|
protected:
|
|
// Open a new socket implementation.
|
|
ASIO_DECL asio::error_code do_open(
|
|
base_implementation_type& impl, int af,
|
|
int type, int protocol, asio::error_code& ec);
|
|
|
|
// Assign a native socket to a socket implementation.
|
|
ASIO_DECL asio::error_code do_assign(
|
|
base_implementation_type& impl, int type,
|
|
const native_handle_type& native_socket, asio::error_code& ec);
|
|
|
|
// Start the asynchronous read or write operation.
|
|
ASIO_DECL void start_op(base_implementation_type& impl, int op_type,
|
|
io_uring_operation* op, bool is_continuation, bool noop);
|
|
|
|
// Start the asynchronous accept operation.
|
|
ASIO_DECL void start_accept_op(base_implementation_type& impl,
|
|
io_uring_operation* op, bool is_continuation, bool peer_is_open);
|
|
|
|
// Helper class used to implement per-operation cancellation
|
|
class io_uring_op_cancellation
|
|
{
|
|
public:
|
|
io_uring_op_cancellation(io_uring_service* s,
|
|
io_uring_service::per_io_object_data* p, int o)
|
|
: io_uring_service_(s),
|
|
io_object_data_(p),
|
|
op_type_(o)
|
|
{
|
|
}
|
|
|
|
void operator()(cancellation_type_t type)
|
|
{
|
|
if (!!(type &
|
|
(cancellation_type::terminal
|
|
| cancellation_type::partial
|
|
| cancellation_type::total)))
|
|
{
|
|
io_uring_service_->cancel_ops_by_key(*io_object_data_, op_type_, this);
|
|
}
|
|
}
|
|
|
|
private:
|
|
io_uring_service* io_uring_service_;
|
|
io_uring_service::per_io_object_data* io_object_data_;
|
|
int op_type_;
|
|
};
|
|
|
|
// The io_uring_service that performs event demultiplexing for the service.
|
|
io_uring_service& io_uring_service_;
|
|
|
|
// Cached success value to avoid accessing category singleton.
|
|
const asio::error_code success_ec_;
|
|
};
|
|
|
|
} // namespace detail
|
|
} // namespace asio
|
|
|
|
#include "asio/detail/pop_options.hpp"
|
|
|
|
#if defined(ASIO_HEADER_ONLY)
|
|
# include "asio/detail/impl/io_uring_socket_service_base.ipp"
|
|
#endif // defined(ASIO_HEADER_ONLY)
|
|
|
|
#endif // defined(ASIO_HAS_IO_URING)
|
|
|
|
#endif // ASIO_DETAIL_IO_URING_SOCKET_SERVICE_BASE_HPP
|