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Diffstat (limited to 'lib/asio/detail/reactive_socket_service_base.hpp')
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1 files changed, 511 insertions, 0 deletions
diff --git a/lib/asio/detail/reactive_socket_service_base.hpp b/lib/asio/detail/reactive_socket_service_base.hpp new file mode 100644 index 0000000..ccd497e --- /dev/null +++ b/lib/asio/detail/reactive_socket_service_base.hpp @@ -0,0 +1,511 @@ +// +// detail/reactive_socket_service_base.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_BASE_HPP +#define ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_BASE_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) \ + && !defined(ASIO_WINDOWS_RUNTIME) + +#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/reactive_null_buffers_op.hpp" +#include "asio/detail/reactive_socket_recv_op.hpp" +#include "asio/detail/reactive_socket_recvmsg_op.hpp" +#include "asio/detail/reactive_socket_send_op.hpp" +#include "asio/detail/reactive_wait_op.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 { + +class reactive_socket_service_base +{ +public: + // The native type of a socket. + typedef socket_type native_handle_type; + + // The implementation type of the socket. + struct base_implementation_type + { + // The native socket representation. + socket_type socket_; + + // The current state of the socket. + socket_ops::state_type state_; + + // Per-descriptor data used by the reactor. + reactor::per_descriptor_data reactor_data_; + }; + + // Constructor. + ASIO_DECL reactive_socket_service_base( + asio::io_context& io_context); + + // Destroy all user-defined handler objects owned by the service. + ASIO_DECL void base_shutdown(); + + // Construct a new socket implementation. + ASIO_DECL void construct(base_implementation_type& impl); + + // Move-construct a new socket implementation. + ASIO_DECL void base_move_construct(base_implementation_type& impl, + base_implementation_type& other_impl); + + // Move-assign from another socket implementation. + ASIO_DECL void base_move_assign(base_implementation_type& impl, + reactive_socket_service_base& other_service, + base_implementation_type& other_impl); + + // Destroy a socket implementation. + ASIO_DECL void destroy(base_implementation_type& impl); + + // Determine whether the socket is open. + bool is_open(const base_implementation_type& impl) const + { + return impl.socket_ != invalid_socket; + } + + // Destroy a socket implementation. + ASIO_DECL asio::error_code close( + base_implementation_type& impl, asio::error_code& ec); + + // Release ownership of the socket. + ASIO_DECL socket_type release( + base_implementation_type& impl, asio::error_code& ec); + + // Get the native socket representation. + native_handle_type native_handle(base_implementation_type& impl) + { + return impl.socket_; + } + + // Cancel all operations associated with the socket. + ASIO_DECL asio::error_code cancel( + base_implementation_type& impl, asio::error_code& ec); + + // Determine whether the socket is at the out-of-band data mark. + bool at_mark(const base_implementation_type& impl, + asio::error_code& ec) const + { + return socket_ops::sockatmark(impl.socket_, ec); + } + + // Determine the number of bytes available for reading. + std::size_t available(const base_implementation_type& impl, + asio::error_code& ec) const + { + return socket_ops::available(impl.socket_, ec); + } + + // Place the socket into the state where it will listen for new connections. + asio::error_code listen(base_implementation_type& impl, + int backlog, asio::error_code& ec) + { + socket_ops::listen(impl.socket_, backlog, ec); + return ec; + } + + // Perform an IO control command on the socket. + template <typename IO_Control_Command> + asio::error_code io_control(base_implementation_type& impl, + IO_Control_Command& command, asio::error_code& ec) + { + socket_ops::ioctl(impl.socket_, impl.state_, command.name(), + static_cast<ioctl_arg_type*>(command.data()), ec); + return ec; + } + + // Gets the non-blocking mode of the socket. + bool non_blocking(const base_implementation_type& impl) const + { + return (impl.state_ & socket_ops::user_set_non_blocking) != 0; + } + + // Sets the non-blocking mode of the socket. + asio::error_code non_blocking(base_implementation_type& impl, + bool mode, asio::error_code& ec) + { + socket_ops::set_user_non_blocking(impl.socket_, impl.state_, mode, ec); + return ec; + } + + // Gets the non-blocking mode of the native socket implementation. + bool native_non_blocking(const base_implementation_type& impl) const + { + return (impl.state_ & socket_ops::internal_non_blocking) != 0; + } + + // Sets the non-blocking mode of the native socket implementation. + asio::error_code native_non_blocking(base_implementation_type& impl, + bool mode, asio::error_code& ec) + { + socket_ops::set_internal_non_blocking(impl.socket_, impl.state_, mode, ec); + return ec; + } + + // Wait for the socket to become ready to read, ready to write, or to have + // pending error conditions. + asio::error_code wait(base_implementation_type& impl, + socket_base::wait_type w, asio::error_code& ec) + { + switch (w) + { + case socket_base::wait_read: + socket_ops::poll_read(impl.socket_, impl.state_, -1, ec); + break; + case socket_base::wait_write: + socket_ops::poll_write(impl.socket_, impl.state_, -1, ec); + break; + case socket_base::wait_error: + socket_ops::poll_error(impl.socket_, impl.state_, -1, ec); + break; + default: + ec = asio::error::invalid_argument; + break; + } + + return ec; + } + + // Asynchronously wait for the socket to become ready to read, ready to + // write, or to have pending error conditions. + template <typename Handler> + void async_wait(base_implementation_type& impl, + socket_base::wait_type w, Handler& handler) + { + bool is_continuation = + asio_handler_cont_helpers::is_continuation(handler); + + // Allocate and construct an operation to wrap the handler. + typedef reactive_wait_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_wait")); + + int op_type; + switch (w) + { + case socket_base::wait_read: + op_type = reactor::read_op; + break; + case socket_base::wait_write: + op_type = reactor::write_op; + break; + case socket_base::wait_error: + op_type = reactor::except_op; + break; + default: + p.p->ec_ = asio::error::invalid_argument; + reactor_.post_immediate_completion(p.p, is_continuation); + p.v = p.p = 0; + return; + } + + start_op(impl, op_type, p.p, is_continuation, false, false); + p.v = p.p = 0; + } + + // Send the given data to the peer. + template <typename ConstBufferSequence> + size_t send(base_implementation_type& impl, + const ConstBufferSequence& buffers, + socket_base::message_flags flags, asio::error_code& ec) + { + buffer_sequence_adapter<asio::const_buffer, + ConstBufferSequence> bufs(buffers); + + return socket_ops::sync_send(impl.socket_, impl.state_, + bufs.buffers(), bufs.count(), flags, bufs.all_empty(), ec); + } + + // Wait until data can be sent without blocking. + size_t send(base_implementation_type& impl, const null_buffers&, + 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(base_implementation_type& impl, + const ConstBufferSequence& buffers, + 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_send_op<ConstBufferSequence, 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_, buffers, flags, handler); + + ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket", + &impl, impl.socket_, "async_send")); + + start_op(impl, reactor::write_op, p.p, is_continuation, true, + ((impl.state_ & socket_ops::stream_oriented) + && buffer_sequence_adapter<asio::const_buffer, + ConstBufferSequence>::all_empty(buffers))); + p.v = p.p = 0; + } + + // Start an asynchronous wait until data can be sent without blocking. + template <typename Handler> + void async_send(base_implementation_type& impl, const null_buffers&, + 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(null_buffers)")); + + start_op(impl, reactor::write_op, p.p, is_continuation, false, false); + p.v = p.p = 0; + } + + // Receive some data from the peer. Returns the number of bytes received. + template <typename MutableBufferSequence> + size_t receive(base_implementation_type& impl, + const MutableBufferSequence& buffers, + socket_base::message_flags flags, asio::error_code& ec) + { + buffer_sequence_adapter<asio::mutable_buffer, + MutableBufferSequence> bufs(buffers); + + return socket_ops::sync_recv(impl.socket_, impl.state_, + bufs.buffers(), bufs.count(), flags, bufs.all_empty(), ec); + } + + // Wait until data can be received without blocking. + size_t receive(base_implementation_type& impl, const null_buffers&, + socket_base::message_flags, asio::error_code& ec) + { + // Wait for socket to become ready. + socket_ops::poll_read(impl.socket_, impl.state_, -1, ec); + + return 0; + } + + // Start an asynchronous receive. The buffer for the data being received + // must be valid for the lifetime of the asynchronous operation. + template <typename MutableBufferSequence, typename Handler> + void async_receive(base_implementation_type& impl, + const MutableBufferSequence& buffers, + 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_recv_op<MutableBufferSequence, 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_, buffers, flags, handler); + + ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket", + &impl, impl.socket_, "async_receive")); + + start_op(impl, + (flags & socket_base::message_out_of_band) + ? reactor::except_op : reactor::read_op, + p.p, is_continuation, + (flags & socket_base::message_out_of_band) == 0, + ((impl.state_ & socket_ops::stream_oriented) + && buffer_sequence_adapter<asio::mutable_buffer, + MutableBufferSequence>::all_empty(buffers))); + p.v = p.p = 0; + } + + // Wait until data can be received without blocking. + template <typename Handler> + void async_receive(base_implementation_type& impl, const null_buffers&, + 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(null_buffers)")); + + 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; + } + + // Receive some data with associated flags. Returns the number of bytes + // received. + template <typename MutableBufferSequence> + size_t receive_with_flags(base_implementation_type& impl, + const MutableBufferSequence& buffers, + socket_base::message_flags in_flags, + socket_base::message_flags& out_flags, asio::error_code& ec) + { + buffer_sequence_adapter<asio::mutable_buffer, + MutableBufferSequence> bufs(buffers); + + return socket_ops::sync_recvmsg(impl.socket_, impl.state_, + bufs.buffers(), bufs.count(), in_flags, out_flags, ec); + } + + // Wait until data can be received without blocking. + size_t receive_with_flags(base_implementation_type& impl, + const null_buffers&, socket_base::message_flags, + socket_base::message_flags& out_flags, asio::error_code& ec) + { + // Wait for socket to become ready. + socket_ops::poll_read(impl.socket_, impl.state_, -1, ec); + + // Clear out_flags, since we cannot give it any other sensible value when + // performing a null_buffers operation. + out_flags = 0; + + return 0; + } + + // Start an asynchronous receive. The buffer for the data being received + // must be valid for the lifetime of the asynchronous operation. + template <typename MutableBufferSequence, typename Handler> + void async_receive_with_flags(base_implementation_type& impl, + const MutableBufferSequence& buffers, socket_base::message_flags in_flags, + socket_base::message_flags& out_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_recvmsg_op<MutableBufferSequence, Handler> op; + typename op::ptr p = { asio::detail::addressof(handler), + op::ptr::allocate(handler), 0 }; + p.p = new (p.v) op(impl.socket_, buffers, in_flags, out_flags, handler); + + ASIO_HANDLER_CREATION((reactor_.context(), *p.p, "socket", + &impl, impl.socket_, "async_receive_with_flags")); + + start_op(impl, + (in_flags & socket_base::message_out_of_band) + ? reactor::except_op : reactor::read_op, + p.p, is_continuation, + (in_flags & socket_base::message_out_of_band) == 0, false); + p.v = p.p = 0; + } + + // Wait until data can be received without blocking. + template <typename Handler> + void async_receive_with_flags(base_implementation_type& impl, + const null_buffers&, socket_base::message_flags in_flags, + socket_base::message_flags& out_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_with_flags(null_buffers)")); + + // Clear out_flags, since we cannot give it any other sensible value when + // performing a null_buffers operation. + out_flags = 0; + + start_op(impl, + (in_flags & socket_base::message_out_of_band) + ? reactor::except_op : reactor::read_op, + p.p, is_continuation, false, false); + p.v = p.p = 0; + } + +protected: + // Open a new socket implementation. + ASIO_DECL asio::error_code do_open( + base_implementation_type& impl, int af, + int type, int protocol, asio::error_code& ec); + + // Assign a native socket to a socket implementation. + ASIO_DECL asio::error_code do_assign( + base_implementation_type& impl, int type, + const native_handle_type& native_socket, asio::error_code& ec); + + // Start the asynchronous read or write operation. + ASIO_DECL void start_op(base_implementation_type& impl, int op_type, + reactor_op* op, bool is_continuation, bool is_non_blocking, bool noop); + + // Start the asynchronous accept operation. + ASIO_DECL void start_accept_op(base_implementation_type& impl, + reactor_op* op, bool is_continuation, bool peer_is_open); + + // Start the asynchronous connect operation. + ASIO_DECL void start_connect_op(base_implementation_type& impl, + reactor_op* op, bool is_continuation, + const socket_addr_type* addr, size_t addrlen); + + // The io_context that owns this socket service. + io_context& io_context_; + + // The selector that performs event demultiplexing for the service. + reactor& reactor_; +}; + +} // namespace detail +} // namespace asio + +#include "asio/detail/pop_options.hpp" + +#if defined(ASIO_HEADER_ONLY) +# include "asio/detail/impl/reactive_socket_service_base.ipp" +#endif // defined(ASIO_HEADER_ONLY) + +#endif // !defined(ASIO_HAS_IOCP) + // && !defined(ASIO_WINDOWS_RUNTIME) + +#endif // ASIO_DETAIL_REACTIVE_SOCKET_SERVICE_BASE_HPP |