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+//
+// detail/winrt_ssocket_service_base.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2021 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_WINRT_SSOCKET_SERVICE_BASE_HPP
+#define ASIO_DETAIL_WINRT_SSOCKET_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_WINDOWS_RUNTIME)
+
+#include "asio/buffer.hpp"
+#include "asio/error.hpp"
+#include "asio/execution_context.hpp"
+#include "asio/socket_base.hpp"
+#include "asio/detail/buffer_sequence_adapter.hpp"
+#include "asio/detail/memory.hpp"
+#include "asio/detail/socket_types.hpp"
+#include "asio/detail/winrt_async_manager.hpp"
+#include "asio/detail/winrt_socket_recv_op.hpp"
+#include "asio/detail/winrt_socket_send_op.hpp"
+
+#if defined(ASIO_HAS_IOCP)
+# include "asio/detail/win_iocp_io_context.hpp"
+#else // defined(ASIO_HAS_IOCP)
+# include "asio/detail/scheduler.hpp"
+#endif // defined(ASIO_HAS_IOCP)
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+class winrt_ssocket_service_base
+{
+public:
+ // The native type of a socket.
+ typedef Windows::Networking::Sockets::StreamSocket^ native_handle_type;
+
+ // The implementation type of the socket.
+ struct base_implementation_type
+ {
+ // Default constructor.
+ base_implementation_type()
+ : socket_(nullptr),
+ next_(0),
+ prev_(0)
+ {
+ }
+
+ // The underlying native socket.
+ native_handle_type socket_;
+
+ // Pointers to adjacent socket implementations in linked list.
+ base_implementation_type* next_;
+ base_implementation_type* prev_;
+ };
+
+ // Constructor.
+ ASIO_DECL winrt_ssocket_service_base(execution_context& 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&);
+
+ // Move-construct a new socket implementation.
+ ASIO_DECL void base_move_construct(base_implementation_type& impl,
+ base_implementation_type& other_impl) ASIO_NOEXCEPT;
+
+ // Move-assign from another socket implementation.
+ ASIO_DECL void base_move_assign(base_implementation_type& impl,
+ winrt_ssocket_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_ != nullptr;
+ }
+
+ // 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 native_handle_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::error_code cancel(base_implementation_type&,
+ asio::error_code& ec)
+ {
+ ec = asio::error::operation_not_supported;
+ return ec;
+ }
+
+ // Determine whether the socket is at the out-of-band data mark.
+ bool at_mark(const base_implementation_type&,
+ asio::error_code& ec) const
+ {
+ ec = asio::error::operation_not_supported;
+ return false;
+ }
+
+ // Determine the number of bytes available for reading.
+ std::size_t available(const base_implementation_type&,
+ asio::error_code& ec) const
+ {
+ ec = asio::error::operation_not_supported;
+ return 0;
+ }
+
+ // Perform an IO control command on the socket.
+ template <typename IO_Control_Command>
+ asio::error_code io_control(base_implementation_type&,
+ IO_Control_Command&, asio::error_code& ec)
+ {
+ ec = asio::error::operation_not_supported;
+ return ec;
+ }
+
+ // Gets the non-blocking mode of the socket.
+ bool non_blocking(const base_implementation_type&) const
+ {
+ return false;
+ }
+
+ // Sets the non-blocking mode of the socket.
+ asio::error_code non_blocking(base_implementation_type&,
+ bool, asio::error_code& ec)
+ {
+ ec = asio::error::operation_not_supported;
+ return ec;
+ }
+
+ // Gets the non-blocking mode of the native socket implementation.
+ bool native_non_blocking(const base_implementation_type&) const
+ {
+ return false;
+ }
+
+ // Sets the non-blocking mode of the native socket implementation.
+ asio::error_code native_non_blocking(base_implementation_type&,
+ bool, asio::error_code& ec)
+ {
+ ec = asio::error::operation_not_supported;
+ return ec;
+ }
+
+ // Send the given data to the peer.
+ template <typename ConstBufferSequence>
+ std::size_t send(base_implementation_type& impl,
+ const ConstBufferSequence& buffers,
+ socket_base::message_flags flags, asio::error_code& ec)
+ {
+ return do_send(impl,
+ buffer_sequence_adapter<asio::const_buffer,
+ ConstBufferSequence>::first(buffers), flags, ec);
+ }
+
+ // Wait until data can be sent without blocking.
+ std::size_t send(base_implementation_type&, const null_buffers&,
+ socket_base::message_flags, asio::error_code& ec)
+ {
+ ec = asio::error::operation_not_supported;
+ 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, typename IoExecutor>
+ void async_send(base_implementation_type& impl,
+ const ConstBufferSequence& buffers, socket_base::message_flags flags,
+ Handler& handler, const IoExecutor& io_ex)
+ {
+ bool is_continuation =
+ asio_handler_cont_helpers::is_continuation(handler);
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef winrt_socket_send_op<ConstBufferSequence, Handler, IoExecutor> op;
+ typename op::ptr p = { asio::detail::addressof(handler),
+ op::ptr::allocate(handler), 0 };
+ p.p = new (p.v) op(buffers, handler, io_ex);
+
+ ASIO_HANDLER_CREATION((scheduler_.context(),
+ *p.p, "socket", &impl, 0, "async_send"));
+
+ start_send_op(impl,
+ buffer_sequence_adapter<asio::const_buffer,
+ ConstBufferSequence>::first(buffers),
+ flags, p.p, is_continuation);
+ p.v = p.p = 0;
+ }
+
+ // Start an asynchronous wait until data can be sent without blocking.
+ template <typename Handler, typename IoExecutor>
+ void async_send(base_implementation_type&, const null_buffers&,
+ socket_base::message_flags, Handler& handler, const IoExecutor& io_ex)
+ {
+ asio::error_code ec = asio::error::operation_not_supported;
+ const std::size_t bytes_transferred = 0;
+ asio::post(io_ex,
+ detail::bind_handler(handler, ec, bytes_transferred));
+ }
+
+ // Receive some data from the peer. Returns the number of bytes received.
+ template <typename MutableBufferSequence>
+ std::size_t receive(base_implementation_type& impl,
+ const MutableBufferSequence& buffers,
+ socket_base::message_flags flags, asio::error_code& ec)
+ {
+ return do_receive(impl,
+ buffer_sequence_adapter<asio::mutable_buffer,
+ MutableBufferSequence>::first(buffers), flags, ec);
+ }
+
+ // Wait until data can be received without blocking.
+ std::size_t receive(base_implementation_type&, const null_buffers&,
+ socket_base::message_flags, asio::error_code& ec)
+ {
+ ec = asio::error::operation_not_supported;
+ 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, typename IoExecutor>
+ void async_receive(base_implementation_type& impl,
+ const MutableBufferSequence& buffers, socket_base::message_flags flags,
+ Handler& handler, const IoExecutor& io_ex)
+ {
+ bool is_continuation =
+ asio_handler_cont_helpers::is_continuation(handler);
+
+ // Allocate and construct an operation to wrap the handler.
+ typedef winrt_socket_recv_op<MutableBufferSequence, Handler, IoExecutor> op;
+ typename op::ptr p = { asio::detail::addressof(handler),
+ op::ptr::allocate(handler), 0 };
+ p.p = new (p.v) op(buffers, handler, io_ex);
+
+ ASIO_HANDLER_CREATION((scheduler_.context(),
+ *p.p, "socket", &impl, 0, "async_receive"));
+
+ start_receive_op(impl,
+ buffer_sequence_adapter<asio::mutable_buffer,
+ MutableBufferSequence>::first(buffers),
+ flags, p.p, is_continuation);
+ p.v = p.p = 0;
+ }
+
+ // Wait until data can be received without blocking.
+ template <typename Handler, typename IoExecutor>
+ void async_receive(base_implementation_type&, const null_buffers&,
+ socket_base::message_flags, Handler& handler, const IoExecutor& io_ex)
+ {
+ asio::error_code ec = asio::error::operation_not_supported;
+ const std::size_t bytes_transferred = 0;
+ asio::post(io_ex,
+ detail::bind_handler(handler, ec, bytes_transferred));
+ }
+
+protected:
+ // Helper function to obtain endpoints associated with the connection.
+ ASIO_DECL std::size_t do_get_endpoint(
+ const base_implementation_type& impl, bool local,
+ void* addr, std::size_t addr_len, asio::error_code& ec) const;
+
+ // Helper function to set a socket option.
+ ASIO_DECL asio::error_code do_set_option(
+ base_implementation_type& impl,
+ int level, int optname, const void* optval,
+ std::size_t optlen, asio::error_code& ec);
+
+ // Helper function to get a socket option.
+ ASIO_DECL void do_get_option(
+ const base_implementation_type& impl,
+ int level, int optname, void* optval,
+ std::size_t* optlen, asio::error_code& ec) const;
+
+ // Helper function to perform a synchronous connect.
+ ASIO_DECL asio::error_code do_connect(
+ base_implementation_type& impl,
+ const void* addr, asio::error_code& ec);
+
+ // Helper function to start an asynchronous connect.
+ ASIO_DECL void start_connect_op(
+ base_implementation_type& impl, const void* addr,
+ winrt_async_op<void>* op, bool is_continuation);
+
+ // Helper function to perform a synchronous send.
+ ASIO_DECL std::size_t do_send(
+ base_implementation_type& impl, const asio::const_buffer& data,
+ socket_base::message_flags flags, asio::error_code& ec);
+
+ // Helper function to start an asynchronous send.
+ ASIO_DECL void start_send_op(base_implementation_type& impl,
+ const asio::const_buffer& data, socket_base::message_flags flags,
+ winrt_async_op<unsigned int>* op, bool is_continuation);
+
+ // Helper function to perform a synchronous receive.
+ ASIO_DECL std::size_t do_receive(
+ base_implementation_type& impl, const asio::mutable_buffer& data,
+ socket_base::message_flags flags, asio::error_code& ec);
+
+ // Helper function to start an asynchronous receive.
+ ASIO_DECL void start_receive_op(base_implementation_type& impl,
+ const asio::mutable_buffer& data, socket_base::message_flags flags,
+ winrt_async_op<Windows::Storage::Streams::IBuffer^>* op,
+ bool is_continuation);
+
+ // The scheduler implementation used for delivering completions.
+#if defined(ASIO_HAS_IOCP)
+ typedef class win_iocp_io_context scheduler_impl;
+#else
+ typedef class scheduler scheduler_impl;
+#endif
+ scheduler_impl& scheduler_;
+
+ // The manager that keeps track of outstanding operations.
+ winrt_async_manager& async_manager_;
+
+ // Mutex to protect access to the linked list of implementations.
+ asio::detail::mutex mutex_;
+
+ // The head of a linked list of all implementations.
+ base_implementation_type* impl_list_;
+};
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#if defined(ASIO_HEADER_ONLY)
+# include "asio/detail/impl/winrt_ssocket_service_base.ipp"
+#endif // defined(ASIO_HEADER_ONLY)
+
+#endif // defined(ASIO_WINDOWS_RUNTIME)
+
+#endif // ASIO_DETAIL_WINRT_SSOCKET_SERVICE_BASE_HPP