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diff --git a/lib/asio/posix/stream_descriptor_service.hpp b/lib/asio/posix/stream_descriptor_service.hpp
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+++ b/lib/asio/posix/stream_descriptor_service.hpp
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+//
+// posix/stream_descriptor_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_POSIX_STREAM_DESCRIPTOR_SERVICE_HPP
+#define ASIO_POSIX_STREAM_DESCRIPTOR_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_ENABLE_OLD_SERVICES)
+
+#if defined(ASIO_HAS_POSIX_STREAM_DESCRIPTOR) \
+  || defined(GENERATING_DOCUMENTATION)
+
+#include <cstddef>
+#include "asio/async_result.hpp"
+#include "asio/error.hpp"
+#include "asio/io_context.hpp"
+#include "asio/detail/reactive_descriptor_service.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace posix {
+
+/// Default service implementation for a stream descriptor.
+class stream_descriptor_service
+#if defined(GENERATING_DOCUMENTATION)
+  : public asio::io_context::service
+#else
+  : public asio::detail::service_base<stream_descriptor_service>
+#endif
+{
+public:
+#if defined(GENERATING_DOCUMENTATION)
+  /// The unique service identifier.
+  static asio::io_context::id id;
+#endif
+
+private:
+  // The type of the platform-specific implementation.
+  typedef detail::reactive_descriptor_service service_impl_type;
+
+public:
+  /// The type of a stream descriptor implementation.
+#if defined(GENERATING_DOCUMENTATION)
+  typedef implementation_defined implementation_type;
+#else
+  typedef service_impl_type::implementation_type implementation_type;
+#endif
+
+  /// The native descriptor type.
+#if defined(GENERATING_DOCUMENTATION)
+  typedef implementation_defined native_handle_type;
+#else
+  typedef service_impl_type::native_handle_type native_handle_type;
+#endif
+
+  /// Construct a new stream descriptor service for the specified io_context.
+  explicit stream_descriptor_service(asio::io_context& io_context)
+    : asio::detail::service_base<stream_descriptor_service>(io_context),
+      service_impl_(io_context)
+  {
+  }
+
+  /// Construct a new stream descriptor implementation.
+  void construct(implementation_type& impl)
+  {
+    service_impl_.construct(impl);
+  }
+
+#if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
+  /// Move-construct a new stream descriptor implementation.
+  void move_construct(implementation_type& impl,
+      implementation_type& other_impl)
+  {
+    service_impl_.move_construct(impl, other_impl);
+  }
+
+  /// Move-assign from another stream descriptor implementation.
+  void move_assign(implementation_type& impl,
+      stream_descriptor_service& other_service,
+      implementation_type& other_impl)
+  {
+    service_impl_.move_assign(impl, other_service.service_impl_, other_impl);
+  }
+#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
+
+  /// Destroy a stream descriptor implementation.
+  void destroy(implementation_type& impl)
+  {
+    service_impl_.destroy(impl);
+  }
+
+  /// Assign an existing native descriptor to a stream descriptor.
+  ASIO_SYNC_OP_VOID assign(implementation_type& impl,
+      const native_handle_type& native_descriptor,
+      asio::error_code& ec)
+  {
+    service_impl_.assign(impl, native_descriptor, ec);
+    ASIO_SYNC_OP_VOID_RETURN(ec);
+  }
+
+  /// Determine whether the descriptor is open.
+  bool is_open(const implementation_type& impl) const
+  {
+    return service_impl_.is_open(impl);
+  }
+
+  /// Close a stream descriptor implementation.
+  ASIO_SYNC_OP_VOID close(implementation_type& impl,
+      asio::error_code& ec)
+  {
+    service_impl_.close(impl, ec);
+    ASIO_SYNC_OP_VOID_RETURN(ec);
+  }
+
+  /// Get the native descriptor implementation.
+  native_handle_type native_handle(implementation_type& impl)
+  {
+    return service_impl_.native_handle(impl);
+  }
+
+  /// Release ownership of the native descriptor implementation.
+  native_handle_type release(implementation_type& impl)
+  {
+    return service_impl_.release(impl);
+  }
+
+  /// Cancel all asynchronous operations associated with the descriptor.
+  ASIO_SYNC_OP_VOID cancel(implementation_type& impl,
+      asio::error_code& ec)
+  {
+    service_impl_.cancel(impl, ec);
+    ASIO_SYNC_OP_VOID_RETURN(ec);
+  }
+
+  /// Perform an IO control command on the descriptor.
+  template <typename IoControlCommand>
+  ASIO_SYNC_OP_VOID io_control(implementation_type& impl,
+      IoControlCommand& command, asio::error_code& ec)
+  {
+    service_impl_.io_control(impl, command, ec);
+    ASIO_SYNC_OP_VOID_RETURN(ec);
+  }
+
+  /// Gets the non-blocking mode of the descriptor.
+  bool non_blocking(const implementation_type& impl) const
+  {
+    return service_impl_.non_blocking(impl);
+  }
+
+  /// Sets the non-blocking mode of the descriptor.
+  ASIO_SYNC_OP_VOID non_blocking(implementation_type& impl,
+      bool mode, asio::error_code& ec)
+  {
+    service_impl_.non_blocking(impl, mode, ec);
+    ASIO_SYNC_OP_VOID_RETURN(ec);
+  }
+
+  /// Gets the non-blocking mode of the native descriptor implementation.
+  bool native_non_blocking(const implementation_type& impl) const
+  {
+    return service_impl_.native_non_blocking(impl);
+  }
+
+  /// Sets the non-blocking mode of the native descriptor implementation.
+  ASIO_SYNC_OP_VOID native_non_blocking(implementation_type& impl,
+      bool mode, asio::error_code& ec)
+  {
+    service_impl_.native_non_blocking(impl, mode, ec);
+    ASIO_SYNC_OP_VOID_RETURN(ec);
+  }
+
+  /// Wait for the descriptor to become ready to read, ready to write, or to
+  /// have pending error conditions.
+  ASIO_SYNC_OP_VOID wait(implementation_type& impl,
+      descriptor_base::wait_type w, asio::error_code& ec)
+  {
+    service_impl_.wait(impl, w, ec);
+    ASIO_SYNC_OP_VOID_RETURN(ec);
+  }
+
+  /// Asynchronously wait for the descriptor to become ready to read, ready to
+  /// write, or to have pending error conditions.
+  template <typename WaitHandler>
+  ASIO_INITFN_RESULT_TYPE(WaitHandler,
+      void (asio::error_code))
+  async_wait(implementation_type& impl, descriptor_base::wait_type w,
+      ASIO_MOVE_ARG(WaitHandler) handler)
+  {
+    async_completion<WaitHandler,
+      void (asio::error_code)> init(handler);
+
+    service_impl_.async_wait(impl, w, init.completion_handler);
+
+    return init.result.get();
+  }
+
+  /// Write the given data to the stream.
+  template <typename ConstBufferSequence>
+  std::size_t write_some(implementation_type& impl,
+      const ConstBufferSequence& buffers, asio::error_code& ec)
+  {
+    return service_impl_.write_some(impl, buffers, ec);
+  }
+
+  /// Start an asynchronous write.
+  template <typename ConstBufferSequence, typename WriteHandler>
+  ASIO_INITFN_RESULT_TYPE(WriteHandler,
+      void (asio::error_code, std::size_t))
+  async_write_some(implementation_type& impl,
+      const ConstBufferSequence& buffers,
+      ASIO_MOVE_ARG(WriteHandler) handler)
+  {
+    asio::async_completion<WriteHandler,
+      void (asio::error_code, std::size_t)> init(handler);
+
+    service_impl_.async_write_some(impl, buffers, init.completion_handler);
+
+    return init.result.get();
+  }
+
+  /// Read some data from the stream.
+  template <typename MutableBufferSequence>
+  std::size_t read_some(implementation_type& impl,
+      const MutableBufferSequence& buffers, asio::error_code& ec)
+  {
+    return service_impl_.read_some(impl, buffers, ec);
+  }
+
+  /// Start an asynchronous read.
+  template <typename MutableBufferSequence, typename ReadHandler>
+  ASIO_INITFN_RESULT_TYPE(ReadHandler,
+      void (asio::error_code, std::size_t))
+  async_read_some(implementation_type& impl,
+      const MutableBufferSequence& buffers,
+      ASIO_MOVE_ARG(ReadHandler) handler)
+  {
+    asio::async_completion<ReadHandler,
+      void (asio::error_code, std::size_t)> init(handler);
+
+    service_impl_.async_read_some(impl, buffers, init.completion_handler);
+
+    return init.result.get();
+  }
+
+private:
+  // Destroy all user-defined handler objects owned by the service.
+  void shutdown()
+  {
+    service_impl_.shutdown();
+  }
+
+  // The platform-specific implementation.
+  service_impl_type service_impl_;
+};
+
+} // namespace posix
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // defined(ASIO_HAS_POSIX_STREAM_DESCRIPTOR)
+       //   || defined(GENERATING_DOCUMENTATION)
+
+#endif // defined(ASIO_ENABLE_OLD_SERVICES)
+
+#endif // ASIO_POSIX_STREAM_DESCRIPTOR_SERVICE_HPP