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

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1		//
2		// Copyright (c) 2026 Steve Gerbino
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_SOCKET_SERVICE_HPP
11		#define BOOST_COROSIO_NATIVE_DETAIL_REACTOR_REACTOR_SOCKET_SERVICE_HPP
12
13		#include <boost/corosio/io/io_object.hpp>
14		#include <boost/corosio/detail/scheduler_op.hpp>
15		#include <boost/corosio/native/detail/reactor/reactor_service_state.hpp>
16		#include <boost/capy/ex/execution_context.hpp>
17
18		#include <memory>
19		#include <mutex>
20
21		namespace boost::corosio::detail {
22
23		/** CRTP base for reactor-backed socket/datagram service implementations.
24
25		Provides the shared construct/destroy/shutdown/close/post/work
26		logic that is identical across all reactor backends and socket
27		types. Derived classes add only protocol-specific open/bind.
28
29		@tparam Derived The concrete service type (CRTP).
30		@tparam ServiceBase The abstract service base (tcp_service
31		or udp_service).
32		@tparam Scheduler The backend's scheduler type.
33		@tparam Impl The backend's socket/datagram impl type.
34		*/
35		template<class Derived, class ServiceBase, class Scheduler, class Impl>
36		class reactor_socket_service : public ServiceBase
37		{
38		friend Derived;
39		using state_type = reactor_service_state<Scheduler, Impl>;
40
41	1068x	explicit reactor_socket_service(capy::execution_context& ctx)
42	1068x	: state_(
43		std::make_unique<state_type>(
44	1068x	ctx.template use_service<Scheduler>()))
45		{
46	1068x	}
47
48		public:
49	1068x	~reactor_socket_service() override = default;
50
51	1068x	void shutdown() override
52		{
53	1068x	std::lock_guard lock(state_->mutex_);
54
55	1068x	while (auto* impl = state_->impl_list_.pop_front())
56		{
57	✗	static_cast<Derived*>(this)->pre_shutdown(impl);
58	✗	impl->close_socket();
59		}
60
61		// Don't clear impl_ptrs_ here. The scheduler shuts down after us
62		// and drains completed_ops_, calling destroy() on each queued op.
63		// Letting ~state_ release the ptrs (during service destruction,
64		// after scheduler shutdown) keeps every impl alive until all ops
65		// have been drained.
66	1068x	}
67
68	30385x	io_object::implementation* construct() override
69		{
70	30385x	auto impl = std::make_shared<Impl>(static_cast<Derived&>(*this));
71	30385x	auto* raw = impl.get();
72
73		{
74	30385x	std::lock_guard lock(state_->mutex_);
75	30385x	state_->impl_ptrs_.emplace(raw, std::move(impl));
76	30385x	state_->impl_list_.push_back(raw);
77	30385x	}
78
79	30385x	return raw;
80	30385x	}
81
82	30385x	void destroy(io_object::implementation* impl) override
83		{
84	30385x	auto* typed = static_cast<Impl*>(impl);
85	30385x	static_cast<Derived*>(this)->pre_destroy(typed);
86	30385x	typed->close_socket();
87	30385x	std::lock_guard lock(state_->mutex_);
88	30385x	state_->impl_list_.remove(typed);
89	30385x	state_->impl_ptrs_.erase(typed);
90	30385x	}
91
92	50611x	void close(io_object::handle& h) override
93		{
94	50611x	static_cast<Impl*>(h.get())->close_socket();
95	50611x	}
96
97	522528x	Scheduler& scheduler() const noexcept
98		{
99	522528x	return state_->sched_;
100		}
101
102	94586x	void post(scheduler_op* op)
103		{
104	94586x	state_->sched_.post(op);
105	94586x	}
106
107	12792x	void work_started() noexcept
108		{
109	12792x	state_->sched_.work_started();
110	12792x	}
111
112	1012x	void work_finished() noexcept
113		{
114	1012x	state_->sched_.work_finished();
115	1012x	}
116
117		protected:
118		// Override in derived to add pre-close logic (e.g. kqueue linger reset)
119	✗	void pre_shutdown(Impl*) noexcept {}
120	30385x	void pre_destroy(Impl*) noexcept {}
121
122		std::unique_ptr<state_type> state_;
123
124		private:
125		reactor_socket_service(reactor_socket_service const&) = delete;
126		reactor_socket_service& operator=(reactor_socket_service const&) = delete;
127		};
128
129		} // namespace boost::corosio::detail
130
131		#endif // BOOST_COROSIO_NATIVE_DETAIL_REACTOR_REACTOR_SOCKET_SERVICE_HPP
132