--- /dev/null
+//
+// detail/io_uring_descriptor_service.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2022 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 BOOST_ASIO_DETAIL_IO_URING_DESCRIPTOR_SERVICE_HPP
+#define BOOST_ASIO_DETAIL_IO_URING_DESCRIPTOR_SERVICE_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+
+#if defined(BOOST_ASIO_HAS_IO_URING)
+
+#include <boost/asio/associated_cancellation_slot.hpp>
+#include <boost/asio/buffer.hpp>
+#include <boost/asio/cancellation_type.hpp>
+#include <boost/asio/execution_context.hpp>
+#include <boost/asio/detail/buffer_sequence_adapter.hpp>
+#include <boost/asio/detail/descriptor_ops.hpp>
+#include <boost/asio/detail/io_uring_descriptor_read_at_op.hpp>
+#include <boost/asio/detail/io_uring_descriptor_read_op.hpp>
+#include <boost/asio/detail/io_uring_descriptor_write_at_op.hpp>
+#include <boost/asio/detail/io_uring_descriptor_write_op.hpp>
+#include <boost/asio/detail/io_uring_null_buffers_op.hpp>
+#include <boost/asio/detail/io_uring_service.hpp>
+#include <boost/asio/detail/io_uring_wait_op.hpp>
+#include <boost/asio/detail/memory.hpp>
+#include <boost/asio/detail/noncopyable.hpp>
+#include <boost/asio/posix/descriptor_base.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+class io_uring_descriptor_service :
+ public execution_context_service_base<io_uring_descriptor_service>
+{
+public:
+ // The native type of a descriptor.
+ typedef int native_handle_type;
+
+ // The implementation type of the descriptor.
+ class implementation_type
+ : private boost::asio::detail::noncopyable
+ {
+ public:
+ // Default constructor.
+ implementation_type()
+ : descriptor_(-1),
+ state_(0)
+ {
+ }
+
+ private:
+ // Only this service will have access to the internal values.
+ friend class io_uring_descriptor_service;
+
+ // The native descriptor representation.
+ int descriptor_;
+
+ // The current state of the descriptor.
+ descriptor_ops::state_type state_;
+
+ // Per I/O object data used by the io_uring_service.
+ io_uring_service::per_io_object_data io_object_data_;
+ };
+
+ // Constructor.
+ BOOST_ASIO_DECL io_uring_descriptor_service(execution_context& context);
+
+ // Destroy all user-defined handler objects owned by the service.
+ BOOST_ASIO_DECL void shutdown();
+
+ // Construct a new descriptor implementation.
+ BOOST_ASIO_DECL void construct(implementation_type& impl);
+
+ // Move-construct a new descriptor implementation.
+ BOOST_ASIO_DECL void move_construct(implementation_type& impl,
+ implementation_type& other_impl) BOOST_ASIO_NOEXCEPT;
+
+ // Move-assign from another descriptor implementation.
+ BOOST_ASIO_DECL void move_assign(implementation_type& impl,
+ io_uring_descriptor_service& other_service,
+ implementation_type& other_impl);
+
+ // Destroy a descriptor implementation.
+ BOOST_ASIO_DECL void destroy(implementation_type& impl);
+
+ // Assign a native descriptor to a descriptor implementation.
+ BOOST_ASIO_DECL boost::system::error_code assign(implementation_type& impl,
+ const native_handle_type& native_descriptor,
+ boost::system::error_code& ec);
+
+ // Determine whether the descriptor is open.
+ bool is_open(const implementation_type& impl) const
+ {
+ return impl.descriptor_ != -1;
+ }
+
+ // Destroy a descriptor implementation.
+ BOOST_ASIO_DECL boost::system::error_code close(implementation_type& impl,
+ boost::system::error_code& ec);
+
+ // Get the native descriptor representation.
+ native_handle_type native_handle(const implementation_type& impl) const
+ {
+ return impl.descriptor_;
+ }
+
+ // Release ownership of the native descriptor representation.
+ BOOST_ASIO_DECL native_handle_type release(implementation_type& impl);
+
+ // Cancel all operations associated with the descriptor.
+ BOOST_ASIO_DECL boost::system::error_code cancel(implementation_type& impl,
+ boost::system::error_code& ec);
+
+ // Perform an IO control command on the descriptor.
+ template <typename IO_Control_Command>
+ boost::system::error_code io_control(implementation_type& impl,
+ IO_Control_Command& command, boost::system::error_code& ec)
+ {
+ descriptor_ops::ioctl(impl.descriptor_, impl.state_,
+ command.name(), static_cast<ioctl_arg_type*>(command.data()), ec);
+ return ec;
+ }
+
+ // Gets the non-blocking mode of the descriptor.
+ bool non_blocking(const implementation_type& impl) const
+ {
+ return (impl.state_ & descriptor_ops::user_set_non_blocking) != 0;
+ }
+
+ // Sets the non-blocking mode of the descriptor.
+ boost::system::error_code non_blocking(implementation_type& impl,
+ bool mode, boost::system::error_code& ec)
+ {
+ descriptor_ops::set_user_non_blocking(
+ impl.descriptor_, impl.state_, mode, ec);
+ return ec;
+ }
+
+ // Gets the non-blocking mode of the native descriptor implementation.
+ bool native_non_blocking(const implementation_type& impl) const
+ {
+ return (impl.state_ & descriptor_ops::internal_non_blocking) != 0;
+ }
+
+ // Sets the non-blocking mode of the native descriptor implementation.
+ boost::system::error_code native_non_blocking(implementation_type& impl,
+ bool mode, boost::system::error_code& ec)
+ {
+ descriptor_ops::set_internal_non_blocking(
+ impl.descriptor_, impl.state_, mode, ec);
+ return ec;
+ }
+
+ // Wait for the descriptor to become ready to read, ready to write, or to have
+ // pending error conditions.
+ boost::system::error_code wait(implementation_type& impl,
+ posix::descriptor_base::wait_type w, boost::system::error_code& ec)
+ {
+ switch (w)
+ {
+ case posix::descriptor_base::wait_read:
+ descriptor_ops::poll_read(impl.descriptor_, impl.state_, ec);
+ break;
+ case posix::descriptor_base::wait_write:
+ descriptor_ops::poll_write(impl.descriptor_, impl.state_, ec);
+ break;
+ case posix::descriptor_base::wait_error:
+ descriptor_ops::poll_error(impl.descriptor_, impl.state_, ec);
+ break;
+ default:
+ ec = boost::asio::error::invalid_argument;
+ break;
+ }
+
+ return ec;
+ }
+
+ // Asynchronously wait for the descriptor to become ready to read, ready to
+ // write, or to have pending error conditions.
+ template <typename Handler, typename IoExecutor>
+ void async_wait(implementation_type& impl,
+ posix::descriptor_base::wait_type w,
+ Handler& handler, const IoExecutor& io_ex)
+ {
+ bool is_continuation =
+ boost_asio_handler_cont_helpers::is_continuation(handler);
+
+ typename associated_cancellation_slot<Handler>::type slot
+ = boost::asio::get_associated_cancellation_slot(handler);
+
+ int op_type;
+ int poll_flags;
+ switch (w)
+ {
+ case posix::descriptor_base::wait_read:
+ op_type = io_uring_service::read_op;
+ poll_flags = POLLIN;
+ break;
+ case posix::descriptor_base::wait_write:
+ op_type = io_uring_service::write_op;
+ poll_flags = POLLOUT;
+ break;
+ case posix::descriptor_base::wait_error:
+ op_type = io_uring_service::except_op;
+ poll_flags = POLLPRI | POLLERR | POLLHUP;
+ break;
+ default:
+ op_type = -1;
+ poll_flags = -1;
+ return;
+ }
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef io_uring_wait_op<Handler, IoExecutor> op;
+ typename op::ptr p = { boost::asio::detail::addressof(handler),
+ op::ptr::allocate(handler), 0 };
+ p.p = new (p.v) op(success_ec_, impl.descriptor_,
+ poll_flags, handler, io_ex);
+
+ // Optionally register for per-operation cancellation.
+ if (slot.is_connected() && op_type != -1)
+ {
+ p.p->cancellation_key_ =
+ &slot.template emplace<io_uring_op_cancellation>(
+ &io_uring_service_, &impl.io_object_data_, op_type);
+ }
+
+ BOOST_ASIO_HANDLER_CREATION((io_uring_service_.context(), *p.p,
+ "descriptor", &impl, impl.descriptor_, "async_wait"));
+
+ start_op(impl, op_type, p.p, is_continuation, op_type == -1);
+ p.v = p.p = 0;
+ }
+
+ // Write some data to the descriptor.
+ template <typename ConstBufferSequence>
+ size_t write_some(implementation_type& impl,
+ const ConstBufferSequence& buffers, boost::system::error_code& ec)
+ {
+ typedef buffer_sequence_adapter<boost::asio::const_buffer,
+ ConstBufferSequence> bufs_type;
+
+ if (bufs_type::is_single_buffer)
+ {
+ return descriptor_ops::sync_write1(impl.descriptor_,
+ impl.state_, bufs_type::first(buffers).data(),
+ bufs_type::first(buffers).size(), ec);
+ }
+ else
+ {
+ bufs_type bufs(buffers);
+
+ return descriptor_ops::sync_write(impl.descriptor_, impl.state_,
+ bufs.buffers(), bufs.count(), bufs.all_empty(), ec);
+ }
+ }
+
+ // Wait until data can be written without blocking.
+ size_t write_some(implementation_type& impl,
+ const null_buffers&, boost::system::error_code& ec)
+ {
+ // Wait for descriptor to become ready.
+ descriptor_ops::poll_write(impl.descriptor_, impl.state_, ec);
+
+ return 0;
+ }
+
+ // Start an asynchronous write. The data being sent must be valid for the
+ // lifetime of the asynchronous operation.
+ template <typename ConstBufferSequence, typename Handler, typename IoExecutor>
+ void async_write_some(implementation_type& impl,
+ const ConstBufferSequence& buffers, Handler& handler,
+ const IoExecutor& io_ex)
+ {
+ bool is_continuation =
+ boost_asio_handler_cont_helpers::is_continuation(handler);
+
+ typename associated_cancellation_slot<Handler>::type slot
+ = boost::asio::get_associated_cancellation_slot(handler);
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef io_uring_descriptor_write_op<
+ ConstBufferSequence, Handler, IoExecutor> op;
+ typename op::ptr p = { boost::asio::detail::addressof(handler),
+ op::ptr::allocate(handler), 0 };
+ p.p = new (p.v) op(success_ec_, impl.descriptor_,
+ impl.state_, buffers, 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_, io_uring_service::write_op);
+ }
+
+ BOOST_ASIO_HANDLER_CREATION((io_uring_service_.context(), *p.p,
+ "descriptor", &impl, impl.descriptor_, "async_write_some"));
+
+ start_op(impl, io_uring_service::write_op, p.p, is_continuation,
+ buffer_sequence_adapter<boost::asio::const_buffer,
+ ConstBufferSequence>::all_empty(buffers));
+ p.v = p.p = 0;
+ }
+
+ // Start an asynchronous wait until data can be written without blocking.
+ template <typename Handler, typename IoExecutor>
+ void async_write_some(implementation_type& impl,
+ const null_buffers&, Handler& handler, const IoExecutor& io_ex)
+ {
+ bool is_continuation =
+ boost_asio_handler_cont_helpers::is_continuation(handler);
+
+ typename associated_cancellation_slot<Handler>::type slot
+ = boost::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 = { boost::asio::detail::addressof(handler),
+ op::ptr::allocate(handler), 0 };
+ p.p = new (p.v) op(success_ec_, impl.descriptor_, POLLOUT, 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_, io_uring_service::write_op);
+ }
+
+ BOOST_ASIO_HANDLER_CREATION((io_uring_service_.context(),
+ *p.p, "descriptor", &impl, impl.descriptor_,
+ "async_write_some(null_buffers)"));
+
+ start_op(impl, io_uring_service::write_op, p.p, is_continuation, false);
+ p.v = p.p = 0;
+ }
+
+ // Write some data to the descriptor at the specified offset.
+ template <typename ConstBufferSequence>
+ size_t write_some_at(implementation_type& impl, uint64_t offset,
+ const ConstBufferSequence& buffers, boost::system::error_code& ec)
+ {
+ typedef buffer_sequence_adapter<boost::asio::const_buffer,
+ ConstBufferSequence> bufs_type;
+
+ if (bufs_type::is_single_buffer)
+ {
+ return descriptor_ops::sync_write_at1(impl.descriptor_,
+ impl.state_, offset, bufs_type::first(buffers).data(),
+ bufs_type::first(buffers).size(), ec);
+ }
+ else
+ {
+ bufs_type bufs(buffers);
+
+ return descriptor_ops::sync_write_at(impl.descriptor_, impl.state_,
+ offset, bufs.buffers(), bufs.count(), bufs.all_empty(), ec);
+ }
+ }
+
+ // Wait until data can be written without blocking.
+ size_t write_some_at(implementation_type& impl, uint64_t,
+ const null_buffers& buffers, boost::system::error_code& ec)
+ {
+ return write_some(impl, buffers, ec);
+ }
+
+ // Start an asynchronous write at the specified offset. The data being sent
+ // must be valid for the lifetime of the asynchronous operation.
+ template <typename ConstBufferSequence, typename Handler, typename IoExecutor>
+ void async_write_some_at(implementation_type& impl, uint64_t offset,
+ const ConstBufferSequence& buffers, Handler& handler,
+ const IoExecutor& io_ex)
+ {
+ bool is_continuation =
+ boost_asio_handler_cont_helpers::is_continuation(handler);
+
+ typename associated_cancellation_slot<Handler>::type slot
+ = boost::asio::get_associated_cancellation_slot(handler);
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef io_uring_descriptor_write_at_op<
+ ConstBufferSequence, Handler, IoExecutor> op;
+ typename op::ptr p = { boost::asio::detail::addressof(handler),
+ op::ptr::allocate(handler), 0 };
+ p.p = new (p.v) op(success_ec_, impl.descriptor_,
+ impl.state_, offset, buffers, 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_, io_uring_service::write_op);
+ }
+
+ BOOST_ASIO_HANDLER_CREATION((io_uring_service_.context(), *p.p,
+ "descriptor", &impl, impl.descriptor_, "async_write_some"));
+
+ start_op(impl, io_uring_service::write_op, p.p, is_continuation,
+ buffer_sequence_adapter<boost::asio::const_buffer,
+ ConstBufferSequence>::all_empty(buffers));
+ p.v = p.p = 0;
+ }
+
+ // Start an asynchronous wait until data can be written without blocking.
+ template <typename Handler, typename IoExecutor>
+ void async_write_some_at(implementation_type& impl,
+ const null_buffers& buffers, Handler& handler, const IoExecutor& io_ex)
+ {
+ return async_write_some(impl, buffers, handler, io_ex);
+ }
+
+ // Read some data from the stream. Returns the number of bytes read.
+ template <typename MutableBufferSequence>
+ size_t read_some(implementation_type& impl,
+ const MutableBufferSequence& buffers, boost::system::error_code& ec)
+ {
+ typedef buffer_sequence_adapter<boost::asio::mutable_buffer,
+ MutableBufferSequence> bufs_type;
+
+ if (bufs_type::is_single_buffer)
+ {
+ return descriptor_ops::sync_read1(impl.descriptor_,
+ impl.state_, bufs_type::first(buffers).data(),
+ bufs_type::first(buffers).size(), ec);
+ }
+ else
+ {
+ bufs_type bufs(buffers);
+
+ return descriptor_ops::sync_read(impl.descriptor_, impl.state_,
+ bufs.buffers(), bufs.count(), bufs.all_empty(), ec);
+ }
+ }
+
+ // Wait until data can be read without blocking.
+ size_t read_some(implementation_type& impl,
+ const null_buffers&, boost::system::error_code& ec)
+ {
+ // Wait for descriptor to become ready.
+ descriptor_ops::poll_read(impl.descriptor_, impl.state_, ec);
+
+ return 0;
+ }
+
+ // Start an asynchronous read. The buffer for the data being read must be
+ // valid for the lifetime of the asynchronous operation.
+ template <typename MutableBufferSequence,
+ typename Handler, typename IoExecutor>
+ void async_read_some(implementation_type& impl,
+ const MutableBufferSequence& buffers,
+ Handler& handler, const IoExecutor& io_ex)
+ {
+ bool is_continuation =
+ boost_asio_handler_cont_helpers::is_continuation(handler);
+
+ typename associated_cancellation_slot<Handler>::type slot
+ = boost::asio::get_associated_cancellation_slot(handler);
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef io_uring_descriptor_read_op<
+ MutableBufferSequence, Handler, IoExecutor> op;
+ typename op::ptr p = { boost::asio::detail::addressof(handler),
+ op::ptr::allocate(handler), 0 };
+ p.p = new (p.v) op(success_ec_, impl.descriptor_,
+ impl.state_, buffers, 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_, io_uring_service::read_op);
+ }
+
+ BOOST_ASIO_HANDLER_CREATION((io_uring_service_.context(), *p.p,
+ "descriptor", &impl, impl.descriptor_, "async_read_some"));
+
+ start_op(impl, io_uring_service::read_op, p.p, is_continuation,
+ buffer_sequence_adapter<boost::asio::mutable_buffer,
+ MutableBufferSequence>::all_empty(buffers));
+ p.v = p.p = 0;
+ }
+
+ // Wait until data can be read without blocking.
+ template <typename Handler, typename IoExecutor>
+ void async_read_some(implementation_type& impl,
+ const null_buffers&, Handler& handler, const IoExecutor& io_ex)
+ {
+ bool is_continuation =
+ boost_asio_handler_cont_helpers::is_continuation(handler);
+
+ typename associated_cancellation_slot<Handler>::type slot
+ = boost::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 = { boost::asio::detail::addressof(handler),
+ op::ptr::allocate(handler), 0 };
+ p.p = new (p.v) op(success_ec_, impl.descriptor_, POLLIN, 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_, io_uring_service::read_op);
+ }
+
+ BOOST_ASIO_HANDLER_CREATION((io_uring_service_.context(),
+ *p.p, "descriptor", &impl, impl.descriptor_,
+ "async_read_some(null_buffers)"));
+
+ start_op(impl, io_uring_service::read_op, p.p, is_continuation, false);
+ p.v = p.p = 0;
+ }
+
+ // Read some data at the specified offset. Returns the number of bytes read.
+ template <typename MutableBufferSequence>
+ size_t read_some_at(implementation_type& impl, uint64_t offset,
+ const MutableBufferSequence& buffers, boost::system::error_code& ec)
+ {
+ typedef buffer_sequence_adapter<boost::asio::mutable_buffer,
+ MutableBufferSequence> bufs_type;
+
+ if (bufs_type::is_single_buffer)
+ {
+ return descriptor_ops::sync_read_at1(impl.descriptor_,
+ impl.state_, offset, bufs_type::first(buffers).data(),
+ bufs_type::first(buffers).size(), ec);
+ }
+ else
+ {
+ bufs_type bufs(buffers);
+
+ return descriptor_ops::sync_read_at(impl.descriptor_, impl.state_,
+ offset, bufs.buffers(), bufs.count(), bufs.all_empty(), ec);
+ }
+ }
+
+ // Wait until data can be read without blocking.
+ size_t read_some_at(implementation_type& impl, uint64_t,
+ const null_buffers& buffers, boost::system::error_code& ec)
+ {
+ return read_some(impl, buffers, ec);
+ }
+
+ // Start an asynchronous read. The buffer for the data being read must be
+ // valid for the lifetime of the asynchronous operation.
+ template <typename MutableBufferSequence,
+ typename Handler, typename IoExecutor>
+ void async_read_some_at(implementation_type& impl,
+ uint64_t offset, const MutableBufferSequence& buffers,
+ Handler& handler, const IoExecutor& io_ex)
+ {
+ bool is_continuation =
+ boost_asio_handler_cont_helpers::is_continuation(handler);
+
+ typename associated_cancellation_slot<Handler>::type slot
+ = boost::asio::get_associated_cancellation_slot(handler);
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef io_uring_descriptor_read_at_op<
+ MutableBufferSequence, Handler, IoExecutor> op;
+ typename op::ptr p = { boost::asio::detail::addressof(handler),
+ op::ptr::allocate(handler), 0 };
+ p.p = new (p.v) op(success_ec_, impl.descriptor_,
+ impl.state_, offset, buffers, 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_, io_uring_service::read_op);
+ }
+
+ BOOST_ASIO_HANDLER_CREATION((io_uring_service_.context(), *p.p,
+ "descriptor", &impl, impl.descriptor_, "async_read_some"));
+
+ start_op(impl, io_uring_service::read_op, p.p, is_continuation,
+ buffer_sequence_adapter<boost::asio::mutable_buffer,
+ MutableBufferSequence>::all_empty(buffers));
+ p.v = p.p = 0;
+ }
+
+ // Wait until data can be read without blocking.
+ template <typename Handler, typename IoExecutor>
+ void async_read_some_at(implementation_type& impl, uint64_t,
+ const null_buffers& buffers, Handler& handler, const IoExecutor& io_ex)
+ {
+ return async_read_some(impl, buffers, handler, io_ex);
+ }
+
+private:
+ // Start the asynchronous operation.
+ BOOST_ASIO_DECL void start_op(implementation_type& impl, int op_type,
+ io_uring_operation* op, bool is_continuation, bool noop);
+
+ // 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 boost::system::error_code success_ec_;
+};
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#if defined(BOOST_ASIO_HEADER_ONLY)
+# include <boost/asio/detail/impl/io_uring_descriptor_service.ipp>
+#endif // defined(BOOST_ASIO_HEADER_ONLY)
+
+#endif // defined(BOOST_ASIO_HAS_IO_URING)
+
+#endif // BOOST_ASIO_DETAIL_IO_URING_DESCRIPTOR_SERVICE_HPP
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