TLA Line data Source code
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_OP_COMPLETE_HPP
11 : #define BOOST_COROSIO_NATIVE_DETAIL_REACTOR_REACTOR_OP_COMPLETE_HPP
12 :
13 : #include <boost/corosio/detail/dispatch_coro.hpp>
14 : #include <boost/corosio/native/detail/endpoint_convert.hpp>
15 : #include <boost/corosio/native/detail/make_err.hpp>
16 : #include <boost/corosio/io/io_object.hpp>
17 :
18 : #include <coroutine>
19 : #include <mutex>
20 : #include <utility>
21 :
22 : #include <netinet/in.h>
23 : #include <sys/socket.h>
24 : #include <unistd.h>
25 :
26 : namespace boost::corosio::detail {
27 :
28 : /** Complete a base read/write operation.
29 :
30 : Translates the recorded errno and cancellation state into
31 : an error_code, stores the byte count, then resumes the
32 : caller via symmetric transfer.
33 :
34 : @tparam Op The concrete operation type.
35 : @param op The operation to complete.
36 : */
37 : template <typename Op>
38 : void
39 HIT 101676 : complete_io_op(Op& op)
40 : {
41 101676 : op.stop_cb.reset();
42 101676 : op.socket_impl_->desc_state_.scheduler_->reset_inline_budget();
43 :
44 101676 : if (op.cancelled.load(std::memory_order_acquire))
45 310 : *op.ec_out = capy::error::canceled;
46 101366 : else if (op.errn != 0)
47 MIS 0 : *op.ec_out = make_err(op.errn);
48 HIT 101366 : else if (op.is_read_operation() && op.bytes_transferred == 0)
49 MIS 0 : *op.ec_out = capy::error::eof;
50 : else
51 HIT 101366 : *op.ec_out = {};
52 :
53 101676 : *op.bytes_out = op.bytes_transferred;
54 :
55 101676 : capy::executor_ref saved_ex(op.ex);
56 101676 : std::coroutine_handle<> saved_h(op.h);
57 101676 : auto prevent = std::move(op.impl_ptr);
58 101676 : dispatch_coro(saved_ex, saved_h).resume();
59 101676 : }
60 :
61 : /** Complete a connect operation with endpoint caching.
62 :
63 : On success, queries the local endpoint via getsockname and
64 : caches both endpoints in the socket impl. Then resumes the
65 : caller via symmetric transfer.
66 :
67 : @tparam Op The concrete connect operation type.
68 : @param op The operation to complete.
69 : */
70 : template <typename Op>
71 : void
72 7485 : complete_connect_op(Op& op)
73 : {
74 7485 : op.stop_cb.reset();
75 7485 : op.socket_impl_->desc_state_.scheduler_->reset_inline_budget();
76 :
77 7485 : bool success =
78 7485 : (op.errn == 0 && !op.cancelled.load(std::memory_order_acquire));
79 :
80 7485 : if (success && op.socket_impl_)
81 : {
82 7481 : endpoint local_ep;
83 7481 : sockaddr_storage local_storage{};
84 7481 : socklen_t local_len = sizeof(local_storage);
85 7481 : if (::getsockname(
86 : op.fd,
87 : reinterpret_cast<sockaddr*>(&local_storage),
88 7481 : &local_len) == 0)
89 7481 : local_ep = from_sockaddr(local_storage);
90 7481 : op.socket_impl_->set_endpoints(local_ep, op.target_endpoint);
91 : }
92 :
93 7485 : if (op.cancelled.load(std::memory_order_acquire))
94 MIS 0 : *op.ec_out = capy::error::canceled;
95 HIT 7485 : else if (op.errn != 0)
96 4 : *op.ec_out = make_err(op.errn);
97 : else
98 7481 : *op.ec_out = {};
99 :
100 7485 : capy::executor_ref saved_ex(op.ex);
101 7485 : std::coroutine_handle<> saved_h(op.h);
102 7485 : auto prevent = std::move(op.impl_ptr);
103 7485 : dispatch_coro(saved_ex, saved_h).resume();
104 7485 : }
105 :
106 : /** Construct and register a peer socket from an accepted fd.
107 :
108 : Creates a new socket impl via the acceptor's associated
109 : socket service, registers it with the scheduler, and caches
110 : the local and remote endpoints.
111 :
112 : @tparam SocketImpl The concrete socket implementation type.
113 : @tparam AcceptorImpl The concrete acceptor implementation type.
114 : @param acceptor_impl The acceptor that accepted the connection.
115 : @param accepted_fd The accepted file descriptor (set to -1 on success).
116 : @param peer_storage The peer address from accept().
117 : @param impl_out Output pointer for the new socket impl.
118 : @param ec_out Output pointer for any error.
119 : @return True on success, false on failure.
120 : */
121 : template <typename SocketImpl, typename AcceptorImpl>
122 : bool
123 7481 : setup_accepted_socket(
124 : AcceptorImpl* acceptor_impl,
125 : int& accepted_fd,
126 : sockaddr_storage const& peer_storage,
127 : io_object::implementation** impl_out,
128 : std::error_code* ec_out)
129 : {
130 7481 : auto* socket_svc = acceptor_impl->service().socket_service();
131 7481 : if (!socket_svc)
132 : {
133 MIS 0 : *ec_out = make_err(ENOENT);
134 0 : return false;
135 : }
136 :
137 HIT 7481 : auto& impl = static_cast<SocketImpl&>(*socket_svc->construct());
138 7481 : impl.set_socket(accepted_fd);
139 :
140 7481 : impl.desc_state_.fd = accepted_fd;
141 : {
142 7481 : std::lock_guard lock(impl.desc_state_.mutex);
143 7481 : impl.desc_state_.read_op = nullptr;
144 7481 : impl.desc_state_.write_op = nullptr;
145 7481 : impl.desc_state_.connect_op = nullptr;
146 7481 : }
147 7481 : socket_svc->scheduler().register_descriptor(
148 : accepted_fd, &impl.desc_state_);
149 :
150 7481 : impl.set_endpoints(
151 : acceptor_impl->local_endpoint(),
152 : from_sockaddr(peer_storage));
153 :
154 7481 : if (impl_out)
155 7481 : *impl_out = &impl;
156 7481 : accepted_fd = -1;
157 7481 : return true;
158 : }
159 :
160 : /** Complete an accept operation.
161 :
162 : Sets up the peer socket on success, or closes the accepted
163 : fd on failure. Then resumes the caller via symmetric transfer.
164 :
165 : @tparam SocketImpl The concrete socket implementation type.
166 : @tparam Op The concrete accept operation type.
167 : @param op The operation to complete.
168 : */
169 : template <typename SocketImpl, typename Op>
170 : void
171 7493 : complete_accept_op(Op& op)
172 : {
173 7493 : op.stop_cb.reset();
174 7493 : op.acceptor_impl_->desc_state_.scheduler_->reset_inline_budget();
175 :
176 7493 : bool success =
177 7493 : (op.errn == 0 && !op.cancelled.load(std::memory_order_acquire));
178 :
179 7493 : if (op.cancelled.load(std::memory_order_acquire))
180 12 : *op.ec_out = capy::error::canceled;
181 7481 : else if (op.errn != 0)
182 MIS 0 : *op.ec_out = make_err(op.errn);
183 : else
184 HIT 7481 : *op.ec_out = {};
185 :
186 7493 : if (success && op.accepted_fd >= 0 && op.acceptor_impl_)
187 : {
188 7481 : if (!setup_accepted_socket<SocketImpl>(
189 : op.acceptor_impl_,
190 7481 : op.accepted_fd,
191 7481 : op.peer_storage,
192 : op.impl_out,
193 : op.ec_out))
194 MIS 0 : success = false;
195 : }
196 :
197 HIT 7493 : if (!success || !op.acceptor_impl_)
198 : {
199 12 : if (op.accepted_fd >= 0)
200 : {
201 MIS 0 : ::close(op.accepted_fd);
202 0 : op.accepted_fd = -1;
203 : }
204 HIT 12 : if (op.impl_out)
205 12 : *op.impl_out = nullptr;
206 : }
207 :
208 7493 : capy::executor_ref saved_ex(op.ex);
209 7493 : std::coroutine_handle<> saved_h(op.h);
210 7493 : auto prevent = std::move(op.impl_ptr);
211 7493 : dispatch_coro(saved_ex, saved_h).resume();
212 7493 : }
213 :
214 : } // namespace boost::corosio::detail
215 :
216 : #endif // BOOST_COROSIO_NATIVE_DETAIL_REACTOR_REACTOR_OP_COMPLETE_HPP
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