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include/asio/detail/impl/reactive_descriptor_service.ipp
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232
include/asio/detail/impl/reactive_descriptor_service.ipp
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//
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// detail/impl/reactive_descriptor_service.ipp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2025 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_IMPL_REACTIVE_DESCRIPTOR_SERVICE_IPP
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#define ASIO_DETAIL_IMPL_REACTIVE_DESCRIPTOR_SERVICE_IPP
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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_WINDOWS) \
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&& !defined(ASIO_WINDOWS_RUNTIME) \
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&& !defined(__CYGWIN__) \
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&& !defined(ASIO_HAS_IO_URING_AS_DEFAULT)
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#include "asio/error.hpp"
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#include "asio/detail/reactive_descriptor_service.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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reactive_descriptor_service::reactive_descriptor_service(
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execution_context& context)
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: execution_context_service_base<reactive_descriptor_service>(context),
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reactor_(asio::use_service<reactor>(context))
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{
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reactor_.init_task();
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}
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void reactive_descriptor_service::shutdown()
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{
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}
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void reactive_descriptor_service::construct(
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reactive_descriptor_service::implementation_type& impl)
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{
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impl.descriptor_ = -1;
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impl.state_ = 0;
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impl.reactor_data_ = reactor::per_descriptor_data();
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}
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void reactive_descriptor_service::move_construct(
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reactive_descriptor_service::implementation_type& impl,
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reactive_descriptor_service::implementation_type& other_impl)
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noexcept
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{
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impl.descriptor_ = other_impl.descriptor_;
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other_impl.descriptor_ = -1;
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impl.state_ = other_impl.state_;
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other_impl.state_ = 0;
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reactor_.move_descriptor(impl.descriptor_,
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impl.reactor_data_, other_impl.reactor_data_);
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}
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void reactive_descriptor_service::move_assign(
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reactive_descriptor_service::implementation_type& impl,
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reactive_descriptor_service& other_service,
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reactive_descriptor_service::implementation_type& other_impl)
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{
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destroy(impl);
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impl.descriptor_ = other_impl.descriptor_;
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other_impl.descriptor_ = -1;
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impl.state_ = other_impl.state_;
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other_impl.state_ = 0;
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other_service.reactor_.move_descriptor(impl.descriptor_,
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impl.reactor_data_, other_impl.reactor_data_);
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}
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void reactive_descriptor_service::destroy(
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reactive_descriptor_service::implementation_type& impl)
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{
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if (is_open(impl))
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{
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ASIO_HANDLER_OPERATION((reactor_.context(),
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"descriptor", &impl, impl.descriptor_, "close"));
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reactor_.deregister_descriptor(impl.descriptor_, impl.reactor_data_,
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(impl.state_ & descriptor_ops::possible_dup) == 0);
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asio::error_code ignored_ec;
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descriptor_ops::close(impl.descriptor_, impl.state_, ignored_ec);
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reactor_.cleanup_descriptor_data(impl.reactor_data_);
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}
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}
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asio::error_code reactive_descriptor_service::assign(
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reactive_descriptor_service::implementation_type& impl,
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const native_handle_type& native_descriptor, asio::error_code& ec)
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{
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if (is_open(impl))
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{
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ec = asio::error::already_open;
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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if (int err = reactor_.register_descriptor(
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native_descriptor, impl.reactor_data_))
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{
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ec = asio::error_code(err,
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asio::error::get_system_category());
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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impl.descriptor_ = native_descriptor;
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impl.state_ = descriptor_ops::possible_dup;
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ec = asio::error_code();
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return ec;
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}
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asio::error_code reactive_descriptor_service::close(
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reactive_descriptor_service::implementation_type& impl,
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asio::error_code& ec)
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{
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if (is_open(impl))
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{
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ASIO_HANDLER_OPERATION((reactor_.context(),
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"descriptor", &impl, impl.descriptor_, "close"));
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reactor_.deregister_descriptor(impl.descriptor_, impl.reactor_data_,
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(impl.state_ & descriptor_ops::possible_dup) == 0);
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descriptor_ops::close(impl.descriptor_, impl.state_, ec);
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reactor_.cleanup_descriptor_data(impl.reactor_data_);
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}
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else
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{
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ec = asio::error_code();
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}
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// The descriptor is closed by the OS even if close() returns an error.
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//
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// (Actually, POSIX says the state of the descriptor is unspecified. On
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// Linux the descriptor is apparently closed anyway; e.g. see
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// http://lkml.org/lkml/2005/9/10/129
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// We'll just have to assume that other OSes follow the same behaviour.)
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construct(impl);
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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reactive_descriptor_service::native_handle_type
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reactive_descriptor_service::release(
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reactive_descriptor_service::implementation_type& impl)
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{
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native_handle_type descriptor = impl.descriptor_;
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if (is_open(impl))
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{
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ASIO_HANDLER_OPERATION((reactor_.context(),
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"descriptor", &impl, impl.descriptor_, "release"));
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reactor_.deregister_descriptor(impl.descriptor_, impl.reactor_data_, false);
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reactor_.cleanup_descriptor_data(impl.reactor_data_);
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construct(impl);
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}
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return descriptor;
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}
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asio::error_code reactive_descriptor_service::cancel(
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reactive_descriptor_service::implementation_type& impl,
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asio::error_code& ec)
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{
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if (!is_open(impl))
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{
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ec = asio::error::bad_descriptor;
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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ASIO_HANDLER_OPERATION((reactor_.context(),
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"descriptor", &impl, impl.descriptor_, "cancel"));
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reactor_.cancel_ops(impl.descriptor_, impl.reactor_data_);
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ec = asio::error_code();
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return ec;
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}
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void reactive_descriptor_service::do_start_op(implementation_type& impl,
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int op_type, reactor_op* op, bool is_continuation,
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bool allow_speculative, bool noop, bool needs_non_blocking,
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void (*on_immediate)(operation* op, bool, const void*),
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const void* immediate_arg)
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{
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if (!noop)
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{
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if ((impl.state_ & descriptor_ops::non_blocking)
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|| !needs_non_blocking
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|| descriptor_ops::set_internal_non_blocking(
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impl.descriptor_, impl.state_, true, op->ec_))
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{
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reactor_.start_op(op_type, impl.descriptor_, impl.reactor_data_, op,
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is_continuation, allow_speculative, on_immediate, immediate_arg);
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return;
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}
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}
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on_immediate(op, is_continuation, immediate_arg);
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}
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} // namespace detail
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // !defined(ASIO_WINDOWS)
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// && !defined(ASIO_WINDOWS_RUNTIME)
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// && !defined(__CYGWIN__)
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// && !defined(ASIO_HAS_IO_URING_AS_DEFAULT)
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#endif // ASIO_DETAIL_IMPL_REACTIVE_DESCRIPTOR_SERVICE_IPP
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