include/boost/corosio/detail/descriptor_service.hpp

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descriptor_service.hpp

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boost::corosio::detail::descriptor_service::descriptor_service() :57 117x 100.0% – 100.0% boost::corosio::detail::descriptor_service::~descriptor_service() :58 117x 100.0% – 100.0%

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1		//
2		// Copyright (c) 2026 Michael Vandeberg
3		//
4		// Distributed under the Boost Software License, Version 1.0. (See accompanying
5		// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6		//
7		// Official repository: https://github.com/cppalliance/corosio
8		//
9
10		#ifndef BOOST_COROSIO_DETAIL_DESCRIPTOR_SERVICE_HPP
11		#define BOOST_COROSIO_DETAIL_DESCRIPTOR_SERVICE_HPP
12
13		#include <boost/corosio/detail/config.hpp>
14		#include <boost/corosio/detail/platform.hpp>
15
16		#if BOOST_COROSIO_POSIX
17
18		#include <boost/corosio/posix_stream_descriptor.hpp>
19		#include <boost/capy/ex/execution_context.hpp>
20
21		#include <system_error>
22
23		namespace boost::corosio::detail {
24
25		/* Abstract descriptor service base class.
26
27		Concrete implementations (epoll, select, kqueue, uring) inherit
28		from this class. The three reactor backends register the adopted
29		fd with their reactor; uring has no adopt-time registration and
30		only takes ownership of it.
31		posix_stream_descriptor.cpp creates the running backend's service
32		on first use via use_backend_service.
33		*/
34		class BOOST_COROSIO_DECL descriptor_service
35		: public capy::execution_context::service
36		, public io_object::io_service
37		{
38		public:
39		/// Identifies this service for execution_context lookup.
40		using key_type = descriptor_service;
41
42		/** Adopt an existing native descriptor.
43
44		The implementation is closed. On failure it stays closed and
45		the caller retains ownership of @a fd. On success the
46		implementation takes ownership and will close it.
47
48		@param impl The descriptor implementation to assign to.
49		@param fd The native descriptor to adopt.
50		@return Error code on failure, empty on success.
51		*/
52		virtual std::error_code assign_descriptor(
53		posix_stream_descriptor::implementation& impl,
54		native_handle_type fd) = 0;
55
56		protected:
57	117x	descriptor_service() = default;
58	117x	~descriptor_service() override = default;
59		};
60
61		} // namespace boost::corosio::detail
62
63		#endif // BOOST_COROSIO_POSIX
64
65		#endif
66