include/boost/corosio/native/detail/reactor/reactor_acceptor_service.hpp

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reactor_acceptor_service.hpp

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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_NATIVE_DETAIL_REACTOR_REACTOR_ACCEPTOR_SERVICE_HPP
11		#define BOOST_COROSIO_NATIVE_DETAIL_REACTOR_REACTOR_ACCEPTOR_SERVICE_HPP
12
13		#include <boost/corosio/io/io_object.hpp>
14		#include <boost/corosio/detail/object_ref.hpp>
15		#include <boost/corosio/detail/scheduler_op.hpp>
16		#include <boost/corosio/native/detail/reactor/reactor_service_state.hpp>
17		#include <boost/capy/ex/execution_context.hpp>
18
19		#include <memory>
20
21		namespace boost::corosio::detail {
22
23		/* CRTP base for reactor-backed acceptor service implementations.
24
25		Provides the shared construct/destroy/shutdown/close/post/work
26		logic that is identical across all reactor backends and acceptor
27		types (TCP and local stream). Derived classes add only
28		protocol-specific open/bind/listen/stream_service.
29
30		@tparam Derived The concrete service type (CRTP).
31		@tparam ServiceBase The abstract service base
32		(tcp_acceptor_service or
33		local_stream_acceptor_service).
34		@tparam Scheduler The backend's scheduler type.
35		@tparam Impl The backend's acceptor impl type.
36		@tparam StreamService The concrete stream service type returned
37		by stream_service().
38		*/
39		template<
40		class Derived,
41		class ServiceBase,
42		class Scheduler,
43		class Impl,
44		class StreamService>
45		class reactor_acceptor_service : public ServiceBase
46		{
47		friend Derived;
48
49		// The intermediate CRTP template below (not Impl itself) is what
50		// actually reaches into state_->pool_ from retire() -- see
51		// reactor_socket_finals.hpp.
52		template<class, class, class, class, class, class>
53		friend class reactor_acceptor_impl;
54
55		using state_type = reactor_service_state<Scheduler, Impl>;
56
57		protected:
58		// NOLINTNEXTLINE(bugprone-crtp-constructor-accessibility)
59	1483x	explicit reactor_acceptor_service(capy::execution_context& ctx)
60	1483x	: ctx_(ctx)
61	1483x	, state_(
62		std::make_unique<state_type>(
63	1483x	ctx.template use_service<Scheduler>()))
64		{
65	1483x	}
66
67		public:
68	1483x	~reactor_acceptor_service() override = default;
69
70	1483x	void shutdown() override
71		{
72	1483x	state_->pool_.shutdown([](Impl* impl) { impl->close_socket(); });
73
74		// See reactor_socket_service::shutdown(): queued ops hold their
75		// own reference; the scheduler's drain releases them after us,
76		// and shutting-down mode deletes rather than recycles at zero.
77	1483x	}
78
79	3751x	io_object::implementation* construct() override
80		{
81	3751x	return state_->pool_.acquire(static_cast<Derived&>(*this));
82		}
83
84	3751x	void destroy(io_object::implementation* impl) override
85		{
86	3751x	auto* typed = static_cast<Impl*>(impl);
87	3751x	typed->close_socket();
88	3751x	release(typed);
89	3751x	}
90
91	6500x	void close(io_object::handle& h) override
92		{
93	6500x	static_cast<Impl*>(h.get())->close_socket();
94	6500x	}
95
96	16709x	Scheduler& scheduler() const noexcept
97		{
98	16709x	return state_->sched_;
99		}
100
101	190x	void post(scheduler_op* op)
102		{
103	190x	state_->sched_.post(op);
104	190x	}
105
106	9597x	void work_started() noexcept
107		{
108	9597x	state_->sched_.work_started();
109	9597x	}
110
111	9372x	StreamService* stream_service() const noexcept
112		{
113	9372x	return stream_svc_;
114		}
115
116		protected:
117		capy::execution_context& ctx_;
118		std::unique_ptr<state_type> state_;
119		StreamService* stream_svc_ = nullptr;
120
121		private:
122		reactor_acceptor_service(reactor_acceptor_service const&) = delete;
123		reactor_acceptor_service&
124		operator=(reactor_acceptor_service const&) = delete;
125		};
126
127		} // namespace boost::corosio::detail
128
129		#endif // BOOST_COROSIO_NATIVE_DETAIL_REACTOR_REACTOR_ACCEPTOR_SERVICE_HPP
130