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Diffstat (limited to 'lib/asio/detail/reactive_socket_service.hpp')
| -rw-r--r-- | lib/asio/detail/reactive_socket_service.hpp | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/lib/asio/detail/reactive_socket_service.hpp b/lib/asio/detail/reactive_socket_service.hpp new file mode 100644 index 0000000..15a4fdb --- /dev/null +++ b/lib/asio/detail/reactive_socket_service.hpp @@ -0,0 +1,526 @@ +// +// detail/reactive_socket_service.hpp +// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com) +// +// Distributed under the Boost Software License, Version 1.0. (See accompanying +// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) +// + +#ifndef ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP +#define ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP + +#if defined(_MSC_VER) && (_MSC_VER >= 1200) +# pragma once +#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) + +#include "asio/detail/config.hpp" + +#if !defined(ASIO_HAS_IOCP) + +#include "asio/buffer.hpp" +#include "asio/error.hpp" +#include "asio/io_context.hpp" +#include "asio/socket_base.hpp" +#include "asio/detail/buffer_sequence_adapter.hpp" +#include "asio/detail/memory.hpp" +#include "asio/detail/noncopyable.hpp" +#include "asio/detail/reactive_null_buffers_op.hpp" +#include "asio/detail/reactive_socket_accept_op.hpp" +#include "asio/detail/reactive_socket_connect_op.hpp" +#include "asio/detail/reactive_socket_recvfrom_op.hpp" +#include "asio/detail/reactive_socket_sendto_op.hpp" +#include "asio/detail/reactive_socket_service_base.hpp" +#include "asio/detail/reactor.hpp" +#include "asio/detail/reactor_op.hpp" +#include "asio/detail/socket_holder.hpp" +#include "asio/detail/socket_ops.hpp" +#include "asio/detail/socket_types.hpp" + +#include "asio/detail/push_options.hpp" + +namespace asio { +namespace detail { + +template <typename Protocol> +class reactive_socket_service : + public service_base<reactive_socket_service<Protocol> >, + public reactive_socket_service_base +{ +public: + // The protocol type. + typedef Protocol protocol_type; + + // The endpoint type. + typedef typename Protocol::endpoint endpoint_type; + + // The native type of a socket. + typedef socket_type native_handle_type; + + // The implementation type of the socket. + struct implementation_type : + reactive_socket_service_base::base_implementation_type + { + // Default constructor. + implementation_type() + : protocol_(endpoint_type().protocol()) + { + } + + // The protocol associated with the socket. + protocol_type protocol_; + }; + + // Constructor. + reactive_socket_service(asio::io_context& io_context) + : service_base<reactive_socket_service<Protocol> >(io_context), + reactive_socket_service_base(io_context) + { + } + + // Destroy all user-defined handler objects owned by the service. + void shutdown() + { + this->base_shutdown(); + } + + // Move-construct a new socket implementation. + void move_construct(implementation_type& impl, + implementation_type& other_impl) + { + this->base_move_construct(impl, other_impl); + + impl.protocol_ = other_impl.protocol_; + other_impl.protocol_ = endpoint_type().protocol(); + } + + // Move-assign from another socket implementation. + void move_assign(implementation_type& impl, + reactive_socket_service_base& other_service, + implementation_type& other_impl) + { + this->base_move_assign(impl, other_service, other_impl); + + impl.protocol_ = other_impl.protocol_; + other_impl.protocol_ = endpoint_type().protocol(); + } + + // Move-construct a new socket implementation from another protocol type. + template <typename Protocol1> + void converting_move_construct(implementation_type& impl, + reactive_socket_service<Protocol1>&, + typename reactive_socket_service< + Protocol1>::implementation_type& other_impl) + { + this->base_move_construct(impl, other_impl); + + impl.protocol_ = protocol_type(other_impl.protocol_); + other_impl.protocol_ = typename Protocol1::endpoint().protocol(); + } + + // Open a new socket implementation. + asio::error_code open(implementation_type& impl, + const protocol_type& protocol, asio::error_code& ec) + { + if (!do_open(impl, protocol.family(), + protocol.type(), protocol.protocol(), ec)) + impl.protocol_ = protocol; + return ec; + } + + // Assign a native socket to a socket implementation. + asio::error_code assign(implementation_type& impl, + const protocol_type& protocol, const native_handle_type& native_socket, + asio::error_code& ec) + { + if (!do_assign(impl, protocol.type(), native_socket, ec)) + impl.protocol_ = protocol; + return ec; + } + + // Get the native socket representation. + native_handle_type native_handle(implementation_type& impl) + { + return impl.socket_; + } + + // Bind the socket to the specified local endpoint. + asio::error_code bind(implementation_type& impl, + const endpoint_type& endpoint, asio::error_code& ec) + { + socket_ops::bind(impl.socket_, endpoint.data(), endpoint.size(), ec); + return ec; + } + + // Set a socket option. + template <typename Option> + asio::error_code set_option(implementation_type& impl, + const Option& option, asio::error_code& ec) + { + socket_ops::setsockopt(impl.socket_, impl.state_, + option.level(impl.protocol_), option.name(impl.protocol_), + option.data(impl.protocol_), option.size(impl.protocol_), ec); + return ec; + } + + // Set a socket option. + template <typename Option> + asio::error_code get_option(const implementation_type& impl, + Option& option, asio::error_code& ec) const + { + std::size_t size = option.size(impl.protocol_); + socket_ops::getsockopt(impl.socket_, impl.state_, + option.level(impl.protocol_), option.name(impl.protocol_), + option.data(impl.protocol_), &size, ec); + if (!ec) + option.resize(impl.protocol_, size); + return ec; + } + + // Get the local endpoint. + endpoint_type local_endpoint(const implementation_type& impl, + asio::error_code& ec) const + { + endpoint_type endpoint; + std::size_t addr_len = endpoint.capacity(); + if (socket_ops::getsockname(impl.socket_, endpoint.data(), &addr_len, ec)) + return endpoint_type(); + endpoint.resize(addr_len); + return endpoint; + } + + // Get the remote endpoint. + endpoint_type remote_endpoint(const implementation_type& impl, + asio::error_code& ec) const + { + endpoint_type endpoint; + std::size_t addr_len = endpoint.capacity(); + if (socket_ops::getpeername(impl.socket_, + endpoint.data(), &addr_len, false, ec)) + return endpoint_type(); + endpoint.resize(addr_len); + return endpoint; + } + + // Disable sends or receives on the socket. + asio::error_code shutdown(base_implementation_type& impl, + socket_base::shutdown_type what, asio::error_code& ec) + { + socket_ops::shutdown(impl.socket_, what, ec); + return ec; + } + + // Send a datagram to the specified endpoint. Returns the number of bytes + // sent. + template <typename ConstBufferSequence> + size_t send_to(implementation_type& impl, const ConstBufferSequence& buffers, + const endpoint_type& destination, socket_base::message_flags flags, + asio::error_code& ec) + { + buffer_sequence_adapter<asio::const_buffer, + ConstBufferSequence> bufs(buffers); + + return socket_ops::sync_sendto(impl.socket_, impl.state_, + bufs.buffers(), bufs.count(), flags, + destination.data(), destination.size(), ec); + } + + // Wait until data can be sent without blocking. + size_t send_to(implementation_type& impl, const null_buffers&, + const endpoint_type&, socket_base::message_flags, + asio::error_code& ec) + { + // Wait for socket to become ready. + socket_ops::poll_write(impl.socket_, impl.state_, -1, ec); + + return 0; + } + + // Start an asynchronous send. The data being sent must be valid for the + // lifetime of the asynchronous operation. + template <typename ConstBufferSequence, typename Handler> + void async_send_to(implementation_type& impl, + const ConstBufferSequence& buffers, + const endpoint_type& destination, socket_base::message_flags flags, + Handler& handler) + { + bool is_continuation = + asio_handler_cont_helpers::is_continuation(handler); + + // Allocate and construct an operation to wrap the handler. + typedef reactive_socket_sendto_op<ConstBufferSequence, + endpoint_type, Handler> op; + typename op::ptr p = { asio::detail::addressof(handler), + op::ptr::allocate(handler), 0 }; + p.p = new (p.v) op(impl.socket_, buffers, destination, flags, handler); + + ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket", + &impl, impl.socket_, "async_send_to")); + + start_op(impl, reactor::write_op, p.p, is_continuation, true, false); + p.v = p.p = 0; + } + + // Start an asynchronous wait until data can be sent without blocking. + template <typename Handler> + void async_send_to(implementation_type& impl, const null_buffers&, + const endpoint_type&, socket_base::message_flags, Handler& handler) + { + bool is_continuation = + asio_handler_cont_helpers::is_continuation(handler); + + // Allocate and construct an operation to wrap the handler. + typedef reactive_null_buffers_op<Handler> op; + typename op::ptr p = { asio::detail::addressof(handler), + op::ptr::allocate(handler), 0 }; + p.p = new (p.v) op(handler); + + ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket", + &impl, impl.socket_, "async_send_to(null_buffers)")); + + start_op(impl, reactor::write_op, p.p, is_continuation, false, false); + p.v = p.p = 0; + } + + // Receive a datagram with the endpoint of the sender. Returns the number of + // bytes received. + template <typename MutableBufferSequence> + size_t receive_from(implementation_type& impl, + const MutableBufferSequence& buffers, + endpoint_type& sender_endpoint, socket_base::message_flags flags, + asio::error_code& ec) + { + buffer_sequence_adapter<asio::mutable_buffer, + MutableBufferSequence> bufs(buffers); + + std::size_t addr_len = sender_endpoint.capacity(); + std::size_t bytes_recvd = socket_ops::sync_recvfrom( + impl.socket_, impl.state_, bufs.buffers(), bufs.count(), + flags, sender_endpoint.data(), &addr_len, ec); + + if (!ec) + sender_endpoint.resize(addr_len); + + return bytes_recvd; + } + + // Wait until data can be received without blocking. + size_t receive_from(implementation_type& impl, const null_buffers&, + endpoint_type& sender_endpoint, socket_base::message_flags, + asio::error_code& ec) + { + // Wait for socket to become ready. + socket_ops::poll_read(impl.socket_, impl.state_, -1, ec); + + // Reset endpoint since it can be given no sensible value at this time. + sender_endpoint = endpoint_type(); + + return 0; + } + + // Start an asynchronous receive. The buffer for the data being received and + // the sender_endpoint object must both be valid for the lifetime of the + // asynchronous operation. + template <typename MutableBufferSequence, typename Handler> + void async_receive_from(implementation_type& impl, + const MutableBufferSequence& buffers, endpoint_type& sender_endpoint, + socket_base::message_flags flags, Handler& handler) + { + bool is_continuation = + asio_handler_cont_helpers::is_continuation(handler); + + // Allocate and construct an operation to wrap the handler. + typedef reactive_socket_recvfrom_op<MutableBufferSequence, + endpoint_type, Handler> op; + typename op::ptr p = { asio::detail::addressof(handler), + op::ptr::allocate(handler), 0 }; + int protocol = impl.protocol_.type(); + p.p = new (p.v) op(impl.socket_, protocol, + buffers, sender_endpoint, flags, handler); + + ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket", + &impl, impl.socket_, "async_receive_from")); + + start_op(impl, + (flags & socket_base::message_out_of_band) + ? reactor::except_op : reactor::read_op, + p.p, is_continuation, true, false); + p.v = p.p = 0; + } + + // Wait until data can be received without blocking. + template <typename Handler> + void async_receive_from(implementation_type& impl, + const null_buffers&, endpoint_type& sender_endpoint, + socket_base::message_flags flags, Handler& handler) + { + bool is_continuation = + asio_handler_cont_helpers::is_continuation(handler); + + // Allocate and construct an operation to wrap the handler. + typedef reactive_null_buffers_op<Handler> op; + typename op::ptr p = { asio::detail::addressof(handler), + op::ptr::allocate(handler), 0 }; + p.p = new (p.v) op(handler); + + ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket", + &impl, impl.socket_, "async_receive_from(null_buffers)")); + + // Reset endpoint since it can be given no sensible value at this time. + sender_endpoint = endpoint_type(); + + start_op(impl, + (flags & socket_base::message_out_of_band) + ? reactor::except_op : reactor::read_op, + p.p, is_continuation, false, false); + p.v = p.p = 0; + } + + // Accept a new connection. + template <typename Socket> + asio::error_code accept(implementation_type& impl, + Socket& peer, endpoint_type* peer_endpoint, asio::error_code& ec) + { + // We cannot accept a socket that is already open. + if (peer.is_open()) + { + ec = asio::error::already_open; + return ec; + } + + std::size_t addr_len = peer_endpoint ? peer_endpoint->capacity() : 0; + socket_holder new_socket(socket_ops::sync_accept(impl.socket_, + impl.state_, peer_endpoint ? peer_endpoint->data() : 0, + peer_endpoint ? &addr_len : 0, ec)); + + // On success, assign new connection to peer socket object. + if (new_socket.get() != invalid_socket) + { + if (peer_endpoint) + peer_endpoint->resize(addr_len); + peer.assign(impl.protocol_, new_socket.get(), ec); + if (!ec) + new_socket.release(); + } + + return ec; + } + +#if defined(ASIO_HAS_MOVE) + // Accept a new connection. + typename Protocol::socket accept(implementation_type& impl, + io_context* peer_io_context, endpoint_type* peer_endpoint, + asio::error_code& ec) + { + typename Protocol::socket peer( + peer_io_context ? *peer_io_context : io_context_); + + std::size_t addr_len = peer_endpoint ? peer_endpoint->capacity() : 0; + socket_holder new_socket(socket_ops::sync_accept(impl.socket_, + impl.state_, peer_endpoint ? peer_endpoint->data() : 0, + peer_endpoint ? &addr_len : 0, ec)); + + // On success, assign new connection to peer socket object. + if (new_socket.get() != invalid_socket) + { + if (peer_endpoint) + peer_endpoint->resize(addr_len); + peer.assign(impl.protocol_, new_socket.get(), ec); + if (!ec) + new_socket.release(); + } + + return peer; + } +#endif // defined(ASIO_HAS_MOVE) + + // Start an asynchronous accept. The peer and peer_endpoint objects must be + // valid until the accept's handler is invoked. + template <typename Socket, typename Handler> + void async_accept(implementation_type& impl, Socket& peer, + endpoint_type* peer_endpoint, Handler& handler) + { + bool is_continuation = + asio_handler_cont_helpers::is_continuation(handler); + + // Allocate and construct an operation to wrap the handler. + typedef reactive_socket_accept_op<Socket, Protocol, Handler> op; + typename op::ptr p = { asio::detail::addressof(handler), + op::ptr::allocate(handler), 0 }; + p.p = new (p.v) op(impl.socket_, impl.state_, peer, + impl.protocol_, peer_endpoint, handler); + + ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket", + &impl, impl.socket_, "async_accept")); + + start_accept_op(impl, p.p, is_continuation, peer.is_open()); + p.v = p.p = 0; + } + +#if defined(ASIO_HAS_MOVE) + // Start an asynchronous accept. The peer_endpoint object must be valid until + // the accept's handler is invoked. + template <typename Handler> + void async_accept(implementation_type& impl, + asio::io_context* peer_io_context, + endpoint_type* peer_endpoint, Handler& handler) + { + bool is_continuation = + asio_handler_cont_helpers::is_continuation(handler); + + // Allocate and construct an operation to wrap the handler. + typedef reactive_socket_move_accept_op<Protocol, Handler> op; + typename op::ptr p = { asio::detail::addressof(handler), + op::ptr::allocate(handler), 0 }; + p.p = new (p.v) op(peer_io_context ? *peer_io_context : io_context_, + impl.socket_, impl.state_, impl.protocol_, peer_endpoint, handler); + + ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket", + &impl, impl.socket_, "async_accept")); + + start_accept_op(impl, p.p, is_continuation, false); + p.v = p.p = 0; + } +#endif // defined(ASIO_HAS_MOVE) + + // Connect the socket to the specified endpoint. + asio::error_code connect(implementation_type& impl, + const endpoint_type& peer_endpoint, asio::error_code& ec) + { + socket_ops::sync_connect(impl.socket_, + peer_endpoint.data(), peer_endpoint.size(), ec); + return ec; + } + + // Start an asynchronous connect. + template <typename Handler> + void async_connect(implementation_type& impl, + const endpoint_type& peer_endpoint, Handler& handler) + { + bool is_continuation = + asio_handler_cont_helpers::is_continuation(handler); + + // Allocate and construct an operation to wrap the handler. + typedef reactive_socket_connect_op<Handler> op; + typename op::ptr p = { asio::detail::addressof(handler), + op::ptr::allocate(handler), 0 }; + p.p = new (p.v) op(impl.socket_, handler); + + ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket", + &impl, impl.socket_, "async_connect")); + + start_connect_op(impl, p.p, is_continuation, + peer_endpoint.data(), peer_endpoint.size()); + p.v = p.p = 0; + } +}; + +} // namespace detail +} // namespace asio + +#include "asio/detail/pop_options.hpp" + +#endif // !defined(ASIO_HAS_IOCP) + +#endif // ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_HPP |